1,939 results match your criteria Beilstein Journal Of Nanotechnology[Journal]


Microwave photon detection by an Al Josephson junction.

Beilstein J Nanotechnol 2020 23;11:960-965. Epub 2020 Jun 23.

Center of Cryogenic Nanoelectronics, Nizhny Novgorod State Technical University, Nizhny Novgorod, Russia.

An aluminium Josephson junction (JJ), with a critical current suppressed by a factor of three compared with the maximal value calculated from the gap, is experimentally investigated for application as a threshold detector for microwave photons. We present the preliminary results of measurements of the lifetime of the superconducting state and the probability of switching by a 9 GHz external signal. We found an anomalously large lifetime, not described by the Kramers' theory for the escape time over a barrier under the influence of fluctuations. Read More

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http://dx.doi.org/10.3762/bjnano.11.80DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7323616PMC

Atomic layer deposition for efficient oxygen evolution reaction at Pt/Ir catalyst layers.

Beilstein J Nanotechnol 2020 22;11:952-959. Epub 2020 Jun 22.

Friedrich-Alexander-Universität Erlangen-Nürnberg, Chair 'Chemistry of Thin Film Materials', IZNF, Cauerstr. 3, 91058 Erlangen, Germany.

We provide a direct comparison of two distinct methods of Ti felt surface treatment and Pt/Ir electrocatalyst deposition for the positive electrode of regenerative fuel cells and vanadium-air redox flow batteries. Each method is well documented in the literature, and this paper provides a direct comparison under identical experimental conditions of electrochemical measurements and in identical units. In the first method, based on classical engineering, the bimetallic catalyst is deposited by dip-coating in a precursor solution of the salts followed by their thermal decomposition. Read More

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http://dx.doi.org/10.3762/bjnano.11.79DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7323626PMC

A 3D-polyphenylalanine network inside porous alumina: Synthesis and characterization of an inorganic-organic composite membrane.

Beilstein J Nanotechnol 2020 17;11:938-951. Epub 2020 Jun 17.

Technische Universität Darmstadt, Fachbereich Chemie, Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Alarich-Weiss Str. 12, 64287 Darmstadt, Germany.

Surface functionalization of porous materials allows for the introduction of additional functionality coupled with high mechanical stability of functionalized inner pores. Herein, we investigate the surface-initiated ring-opening polymerization (SI-ROP) of phenylalanine--carboxyanhydride (PA-NCA) in porous alumina membranes (ALOX-membranes) with respect to different solvent mixtures (tetrahydrofuran (THF) and dichloromethane (DCM)). It was found that increasing the volume fraction of DCM leads to an increasing amount of fibrillar polymer structures within the porous ALOX-membrane. Read More

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http://dx.doi.org/10.3762/bjnano.11.78DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7308615PMC

Extracting viscoelastic material parameters using an atomic force microscope and static force spectroscopy.

Beilstein J Nanotechnol 2020 16;11:922-937. Epub 2020 Jun 16.

Department of Mechanical and Aerospace Engineering, The George Washington University School of Engineering and Applied Science, 800 22nd St. NW, Suite 3000, Washington, DC 20052, United States.

Atomic force microscopy (AFM) techniques have provided and continue to provide increasingly important insights into surface morphology, mechanics, and other critical material characteristics at the nanoscale. One attractive implementation involves extracting meaningful material properties, which demands physically accurate models specifically designed for AFM experimentation and simulation. The AFM community has pursued the precise quantification and extraction of rate-dependent material properties, in particular, for a significant period of time, attempting to describe the standard viscoelastic response of materials. Read More

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http://dx.doi.org/10.3762/bjnano.11.77DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7308608PMC

Measurement of electrostatic tip-sample interactions by time-domain Kelvin probe force microscopy.

Beilstein J Nanotechnol 2020 15;11:911-921. Epub 2020 Jun 15.

Nanotechnology Group, ETH Zürich, Säumerstrasse 4, 8803 Rüschlikon, Switzerland.

Kelvin probe force microscopy is a scanning probe technique used to quantify the local electrostatic potential of a surface. In common implementations, the bias voltage between the tip and the sample is modulated. The resulting electrostatic force or force gradient is detected via lock-in techniques and canceled by adjusting the dc component of the tip-sample bias. Read More

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http://dx.doi.org/10.3762/bjnano.11.76DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7308609PMC

Band tail state related photoluminescence and photoresponse of ZnMgO solid solution nanostructured films.

Beilstein J Nanotechnol 2020 12;11:899-910. Epub 2020 Jun 12.

National Center for Materials Study and Testing, Technical University of Moldova, Chisinau MD-2004, Republic of Moldova.

A series of Zn Mg O thin films with the composition range = 0.00-0.40 has been prepared by sol-gel spin coating on Si substrates with a post-deposition thermal treatment in the temperature range of 400-650 °C. Read More

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http://dx.doi.org/10.3762/bjnano.11.75DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7296199PMC

Three-dimensional solvation structure of ethanol on carbonate minerals.

Beilstein J Nanotechnol 2020 10;11:891-898. Epub 2020 Jun 10.

Physical Chemistry I, Faculty of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.

Calcite and magnesite are important mineral constituents of the earth's crust. In aqueous environments, these carbonates typically expose their most stable cleavage plane, the (10.4) surface. Read More

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http://dx.doi.org/10.3762/bjnano.11.74DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7296196PMC

Simulations of the 2D self-assembly of tripod-shaped building blocks.

Beilstein J Nanotechnol 2020 8;11:884-890. Epub 2020 Jun 8.

Department for Theoretical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University in Lublin, Poland.

We introduce a molecular dynamics (MD) coarse-grained model for the description of tripod building blocks. This model has been used by us already for linear, V-shape, and tetratopic molecules. We wanted to further extend its possibilities to trifunctional molecules to prove its versatility. Read More

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http://dx.doi.org/10.3762/bjnano.11.73DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7296195PMC

Key for crossing the BBB with nanoparticles: the rational design.

Beilstein J Nanotechnol 2020 4;11:866-883. Epub 2020 Jun 4.

MyBiotech GmbH; Industriestraße 1B, 66802 Überherrn, Germany.

Central nervous system diseases are a heavy burden on society and health care systems. Hence, the delivery of drugs to the brain has gained more and more interest. The brain is protected by the blood-brain barrier (BBB), a selective barrier formed by the endothelial cells of the cerebral microvessels, which at the same time acts as a bottleneck for drug delivery by preventing the vast majority of drugs to reach the brain. Read More

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http://dx.doi.org/10.3762/bjnano.11.72DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7277618PMC

A Josephson junction based on a highly disordered superconductor/low-resistivity normal metal bilayer.

Beilstein J Nanotechnol 2020 2;11:858-865. Epub 2020 Jun 2.

Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhny Novgorod, 603950, Russia.

We calculate the current-phase relation (CPR) of a SN-S-SN Josephson junction based on a SN bilayer of variable thickness composed of a highly disordered superconductor (S) and a low-resistivity normal metal (N) with proximity-induced superconductivity. In such a junction, the N layer provides both a large concentration of phase in the weak link and good heat dissipation. We find that when the thickness of the S and the N layer and the length of the S constriction are about the superconducting coherence length the CPR is single-valued and can be close to a sinusoidal shape. Read More

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http://dx.doi.org/10.3762/bjnano.11.71DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7277701PMC

Agglomerates of nanoparticles.

Authors:
Dieter Vollath

Beilstein J Nanotechnol 2020 2;11:854-857. Epub 2020 Jun 2.

NanoConsulting, Primelweg 3, Stutensee 76297, Germany.

Nanoparticles tend to agglomerate. The process of agglomeration is ruled by thermodynamics. Depending on the sign of the enthalpy of interaction, ensembles consist of (repelling) poorly agglomerated or (attracting) highly agglomerated particles. Read More

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http://dx.doi.org/10.3762/bjnano.11.70DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7277778PMC

Transition from freestanding SnO nanowires to laterally aligned nanowires with a simulation-based experimental design.

Beilstein J Nanotechnol 2020 28;11:843-853. Epub 2020 May 28.

Laboratory for Nanotechnology, Department of Microsystems Engineering (IMTEK), University of Freiburg, Georges-Köhler-Allee 103, 79110 Freiburg, Germany.

In this study, we used simulations as a guide for experiments in order to switch freestanding nanowire growth to a laterally aligned growth mode. By means of finite element simulations, we determined that a higher volumetric flow and a reduced process pressure will result in a preferred laterally aligned nanowire growth. Furthermore, increasing the volumetric flow leads to a higher species dilution. Read More

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http://dx.doi.org/10.3762/bjnano.11.69DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7277887PMC

Integrated photonics multi-waveguide devices for optical trapping and Raman spectroscopy: design, fabrication and performance demonstration.

Beilstein J Nanotechnol 2020 27;11:829-842. Epub 2020 May 27.

Department of Imaging Physics, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, Netherlands.

We realized integrated photonics multi-waveguide devices for optical trapping and Raman spectroscopy of particles in a fluid. In these devices, multiple beams directed towards the device center lead to a local field enhancement around this center and thus counteract the effect of light concentration near the facets, which is a disadvantage of dual-waveguide traps. Thus, a trapping region is created around the center, where a single particle of a size in a wide range can be trapped and studied spectroscopically, free from the influence of surfaces. Read More

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http://dx.doi.org/10.3762/bjnano.11.68DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7277546PMC

Adsorption behavior of tin phthalocyanine onto the (110) face of rutile TiO.

Beilstein J Nanotechnol 2020 26;11:821-828. Epub 2020 May 26.

Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, ul. S. Lojasiewicza 11, 30-348 Krakow, Poland.

The adsorption behavior of tin phthalocyanine (SnPc) molecules on rutile TiO(110) was studied by scanning tunneling microscopy (STM). Low-temperature STM measurements of single molecules reveal the coexistence of two conformations of molecules on the TiO surface. Density functional theory-based simulations (DFT) indicate that the difference originates from the position of the tin atom protruding from the molecule plane. Read More

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http://dx.doi.org/10.3762/bjnano.11.67DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7277932PMC

Templating effect of single-layer graphene supported by an insulating substrate on the molecular orientation of lead phthalocyanine.

Beilstein J Nanotechnol 2020 19;11:814-820. Epub 2020 May 19.

Centre for Nano and Soft Matter Sciences, Jalahalli, Bengaluru 560 013, India.

The influence of single-layer graphene on top of a SiO/Si surface on the orientation of nonplanar lead phthalocyanine (PbPc) molecules is studied using two-dimensional grazing incidence X-ray diffraction. The studies indicate the formation of a mixture of polymorphs, i.e. Read More

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http://dx.doi.org/10.3762/bjnano.11.66DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7277535PMC

Epitaxial growth and superconducting properties of thin-film PdFe/VN and VN/PdFe bilayers on MgO(001) substrates.

Beilstein J Nanotechnol 2020 15;11:807-813. Epub 2020 May 15.

Kazan Federal University, Kremlyovskaya str. 18, 420008 Kazan, Russia.

Single-layer vanadium nitride (VN) and bilayer PdFe/VN and VN/PdFe thin-film heterostructures for possible spintronics applications were synthesized on (001)-oriented single-crystalline magnesium oxide (MgO) substrates utilizing a four-chamber ultrahigh vacuum deposition and analysis system. The VN layers were reactively magnetron sputtered from a metallic vanadium target in Ar/N plasma, while the Pd Fe layers were deposited by co-evaporation of metallic Pd and Fe pellets from calibrated effusion cells in a molecular beam epitaxy chamber. The VN stoichiometry and Pd Fe composition were controlled by X-ray photoelectron spectroscopy. Read More

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http://dx.doi.org/10.3762/bjnano.11.65DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7237814PMC

A set of empirical equations describing the observed colours of metal-anodic aluminium oxide-Al nanostructures.

Beilstein J Nanotechnol 2020 13;11:798-806. Epub 2020 May 13.

Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Mechanics of Materials and Nanostructures, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland.

Structural colours have received a lot of attention regarding the reproduction of the vivid colours found in nature. In this study, metal-anodic aluminium oxide (AAO)-Al nanostructures were deposited using a two-step anodization and sputtering process to produce self-ordered anodic aluminium oxide films and a metal layer (8 nm Cr and 25, 17.5 and 10 nm of Au), respectively. Read More

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http://dx.doi.org/10.3762/bjnano.11.64DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7237813PMC

Light-matter interactions in two-dimensional layered WSe for gauging evolution of phonon dynamics.

Beilstein J Nanotechnol 2020 12;11:782-797. Epub 2020 May 12.

Department of Electrical Engineering, University of North Texas, Denton, TX 76203, United States.

Phonon dynamics is explored in mechanically exfoliated two-dimensional WSe using temperature-dependent and laser-power-dependent Raman and photoluminescence (PL) spectroscopy. From this analysis, phonon lifetime in the Raman active modes and phonon concentration, as correlated to the energy parameter , were calculated as a function of the laser power, , and substrate temperature, . For monolayer WSe, from the power dependence it was determined that the phonon lifetime for the in-plane vibrational mode was twice that of the out-of-plane vibrational mode for in the range from 0. Read More

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http://dx.doi.org/10.3762/bjnano.11.63DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7237805PMC

Nickel nanoparticles supported on a covalent triazine framework as electrocatalyst for oxygen evolution reaction and oxygen reduction reactions.

Beilstein J Nanotechnol 2020 11;11:770-781. Epub 2020 May 11.

Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany.

Covalent triazine frameworks (CTFs) are little investigated, albeit they are promising candidates for electrocatalysis, especially for the oxygen evolution reaction (OER). In this work, nickel nanoparticles (from Ni(COD)) were supported on CTF-1 materials, which were synthesized from 1,4-dicyanobenzene at 400 °C and 600 °C by the ionothermal method. CTF-1-600 and Ni/CTF-1-600 show high catalytic activity towards OER and a clear activity for the electrochemical oxygen reduction reaction (ORR). Read More

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http://dx.doi.org/10.3762/bjnano.11.62DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7237812PMC

Hexagonal boron nitride: a review of the emerging material platform for single-photon sources and the spin-photon interface.

Beilstein J Nanotechnol 2020 8;11:740-769. Epub 2020 May 8.

Mechanical Engineering Department, College of Engineering, Prince Mohammad Bin Fahd University, Al Khobar 31952, Kingdom of Saudi Arabia.

Single-photon sources and their optical spin readout are at the core of applications in quantum communication, quantum computation, and quantum sensing. Their integration in photonic structures such as photonic crystals, microdisks, microring resonators, and nanopillars is essential for their deployment in quantum technologies. While there are currently only two material platforms (diamond and silicon carbide) with proven single-photon emission from the visible to infrared, a quantum spin-photon interface, and ancilla qubits, it is expected that other material platforms could emerge with similar characteristics in the near future. Read More

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http://dx.doi.org/10.3762/bjnano.11.61DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7214868PMC

Quantitative determination of the interaction potential between two surfaces using frequency-modulated atomic force microscopy.

Beilstein J Nanotechnol 2020 6;11:729-739. Epub 2020 May 6.

Department of Mechanical and Manufacturing Engineering, University of Calgary, 40 Research Place NW, Calgary, Alberta T2L 1Y6, Canada.

The interaction potential between two surfaces determines the adhesive and repulsive forces between them. It also determines interfacial properties, such as adhesion and friction, and is a key input into mechanics models and atomistic simulations of contacts. We have developed a novel methodology to experimentally determine interaction potential parameters, given a particular potential form, using frequency-modulated atomic force microscopy (AFM). Read More

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http://dx.doi.org/10.3762/bjnano.11.60DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7214878PMC

Effect of Ag loading position on the photocatalytic performance of TiO nanocolumn arrays.

Beilstein J Nanotechnol 2020 5;11:717-728. Epub 2020 May 5.

Beijing Engineering Research Center of Laser Technology, Research Institute of Laser Engineering, Beijing University of Technology, No. 100 Pingle Park, Chaoyang District, Beijing 100124, People's Republic of China.

Plasmonic metal/semiconductor composites have attracted great attention for efficient solar energy harvesting in photovoltaic and photocatalytic applications owing to their extremely high visible-light absorption and tuned effective band gap. In this work, Ag-loaded TiO nanocolumn (Ag-TNC) arrays were fabricated based on anodic aluminum oxide (AAO) template by combining atomic layer deposition (ALD) and vacuum evaporation. The effects of the Ag loading position and deposition thickness, and the morphology, structure and composition of Ag-deposited TNC arrays on its optical and photocatalytic properties were studied. Read More

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http://dx.doi.org/10.3762/bjnano.11.59DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7214874PMC

Stochastic excitation for high-resolution atomic force acoustic microscopy imaging: a system theory approach.

Beilstein J Nanotechnol 2020 4;11:703-716. Epub 2020 May 4.

CINVESTAV. Libramiento Norponiente #2000 C.P. 76230, Fracc. Real de Juriquilla, Querétaro, Querétaro, México.

In this work, a high-resolution atomic force acoustic microscopy imaging technique is developed in order to obtain the local indentation modulus at the nanoscale level. The technique uses a model that gives a qualitative relationship between a set of contact resonance frequencies and the indentation modulus. It is based on white-noise excitation of the tip-sample interaction and uses system theory for the extraction of the resonance modes. Read More

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http://dx.doi.org/10.3762/bjnano.11.58DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7214876PMC

Structural optical and electrical properties of a transparent conductive ITO/Al-Ag/ITO multilayer contact.

Beilstein J Nanotechnol 2020 27;11:695-702. Epub 2020 Apr 27.

Microelectronic and Nanotechnology Shamsuddin Research Centre (MiNT-SRC), Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, Malaysia.

Indium tin oxide (ITO) is a widely used material for transparent conductive oxide (TCO) films due to its good optical and electrical properties. Improving the optoelectronic properties of ITO films with reduced thickness is crucial and quite challenging. ITO-based multilayer films with an aluminium-silver (Al-Ag) interlayer (ITO/Al-Ag/ITO) and a pure ITO layer (as reference) were prepared by RF and DC sputtering. Read More

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http://dx.doi.org/10.3762/bjnano.11.57DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7214864PMC
April 2020
2.326 Impact Factor

Effect of substitutional defects on resonant tunneling diodes based on armchair graphene and boron nitride nanoribbons lateral heterojunctions.

Authors:
Majid Sanaeepur

Beilstein J Nanotechnol 2020 24;11:688-694. Epub 2020 Apr 24.

Department of Electrical Engineering, Faculty of Engineering, Arak University, Arak, 3815688349, Iran.

A nanometer-scaled resonant tunneling diode based on lateral heterojunctions of armchair graphene and boron nitride nanoribbons, exhibiting negative differential resistance is proposed. Low-bandgap armchair graphene nanoribbons and high-bandgap armchair boron nitride nanoribbons are used to design the well and the barrier region, respectively. The effect of all possible substitutional defects (including B, N, C, and C) at the interface of graphene and boron nitride nanoribbons on the negative differential resistance behavior of the proposed resonant tunneling diode is investigated. Read More

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http://dx.doi.org/10.3762/bjnano.11.56DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7188999PMC

Electromigration-induced directional steps towards the formation of single atomic Ag contacts.

Beilstein J Nanotechnol 2020 22;11:680-687. Epub 2020 Apr 22.

Institut für Festkörperphysik, Leibniz Universität Hannover, Appelstraße 2, 30167 Hannover, Germany.

Even though there have been many experimental attempts and theoretical approaches to understand the process of electromigration (EM), it has not been quantitatively understood for ultrathin structures and at grain boundaries. Nevertheless, we showed recently that it can be used reliably for the formation of single atomic point contacts after careful pre-structuring of the initial Ag nanostructures. The process of formation of nanocontacts by EM down to a single-atom point contact was investigated for ultrathin (5 nm) Ag structures at 100 K by measuring the conductance as a function of the time during EM. Read More

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http://dx.doi.org/10.3762/bjnano.11.55DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7188988PMC

Correction: An advanced structural characterization of templated meso-macroporous carbon monoliths by small- and wide-angle scattering techniques.

Beilstein J Nanotechnol 2020 22;11:678-679. Epub 2020 Apr 22.

Institute of Physical Chemistry, Justus Liebig University, Heinrich-Buff-Rung 17, 35492 Giessen, Germany.

[This corrects the article DOI: 10.3762/bjnano.11. Read More

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http://dx.doi.org/10.3762/bjnano.11.54DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7188985PMC

A novel dry-blending method to reduce the coefficient of thermal expansion of polymer templates for OTFT electrodes.

Beilstein J Nanotechnol 2020 20;11:671-677. Epub 2020 Apr 20.

School of Mechanical and Electrical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.

Among the patterning technologies for organic thin-film transistors (OTFTs), the fabrication of OTFT electrodes using polymer templates has attracted much attention. However, deviations in the electrode alignment occur because the coefficient of thermal expansion (CTE) of the polymer template is much higher than the CTE of the dielectric layer. Here, a novel dry-blending method is described in which SiO nanoparticles are filled into a grooved silicon template, followed by permeation of polydimethylsiloxane (PDMS) into the SiO nanoparticle gaps. Read More

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http://dx.doi.org/10.3762/bjnano.11.53DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7188987PMC

Exfoliation in a low boiling point solvent and electrochemical applications of MoO.

Beilstein J Nanotechnol 2020 17;11:662-670. Epub 2020 Apr 17.

Energy Materials Laboratory, Centre for Nano and Soft Matter Sciences, Jalahalli, Bengaluru 560013, India.

MoO is a versatile two-dimensional transition metal oxide having applications in areas such as energy storage devices, electronic devices and catalysis. To efficiently utilize the properties of MoO arising from its two-dimensional nature exfoliation is necessary. In this work, the exfoliation of MoO is carried out in 2-butanone for the first time. Read More

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http://dx.doi.org/10.3762/bjnano.11.52DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7176920PMC

Observation of unexpected uniaxial magnetic anisotropy in LaSrMnO films by a BaTiO overlayer in an artificial multiferroic bilayer.

Beilstein J Nanotechnol 2020 16;11:651-661. Epub 2020 Apr 16.

Departamento de Física de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain.

We studied in detail the in-plane magnetic properties of heterostructures based on a ferroelectric BaTiO overlayer deposited on a ferromagnetic LaSrMnO film grown epitaxially on pseudocubic (001)-oriented SrTiO, (LaAlO)(SrTaAlO) and LaAlO substrates. In this configuration, the combination of both functional perovskites constitutes an artificial multiferroic system with potential applications in spintronic devices based on the magnetoelectric effect. LaSrMnO single layers and BaTiO/LaSrMnO bilayers using the pulsed-laser deposition technique. Read More

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http://dx.doi.org/10.3762/bjnano.11.51DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7176924PMC

Preparation, characterization and photocatalytic performance of heterostructured CuO-ZnO-loaded composite nanofiber membranes.

Beilstein J Nanotechnol 2020 15;11:631-650. Epub 2020 Apr 15.

National Engineering Laboratory for Modern Silk, College of Textile and Engineering, Soochow University, 199 Ren-ai Road, Suzhou 215123, China.

Inorganic semiconductor oxides loaded on composite nanofibers (CNFs) have been widely applied in environmental monitoring, industry, aviation, and transportation. In this paper, heterostructured CuO-ZnO-loaded CNF membranes (CNFMs) were prepared successfully by a combination of electrospinning, heat treatment, and hydrothermal synthesis. The influence of the synthesis parameters on morphology, structure, and properties of the CNFMs was investigated, and the optimal process parameters were determined. Read More

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http://dx.doi.org/10.3762/bjnano.11.50DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7177000PMC

Silver-decorated gel-shell nanobeads: physicochemical characterization and evaluation of antibacterial properties.

Beilstein J Nanotechnol 2020 14;11:620-630. Epub 2020 Apr 14.

University of Warsaw, Department of Chemistry, Pasteura 1, 02-093 Warsaw, Poland.

We report on the synthesis of composite nanobeads with antibacterial properties. The particles consist of polystyrene cores that are surrounded by sulfonic gel shells with embedded silver nanoparticles. The nanocomposite beads are prepared by sulfonation of polystyrene particles followed by accumulation of silver ions in the shell layer and subsequent reduction with sodium borohydride. Read More

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http://dx.doi.org/10.3762/bjnano.11.49DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7176999PMC

Soybean-derived blue photoluminescent carbon dots.

Beilstein J Nanotechnol 2020 9;11:606-619. Epub 2020 Apr 9.

Materials Program, Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, United States.

Biomass-derived carbon dots (CDs) are biocompatible and have potential for a variety of applications, including bioimaging and biosensing. In this work, we use ground soybean residuals to synthesize carbon nanoparticles by hydrothermal carbonization (HTC), annealing at high temperature, and laser ablation (LA) in a NHOH solution. The carbon nanoparticles synthesized with the HTC process (HTC-CDs) exhibit photoluminescent characteristics with strong blue emission. Read More

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http://dx.doi.org/10.3762/bjnano.11.48DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7155895PMC

Adsorptive removal of bulky dye molecules from water with mesoporous polyaniline-derived carbon.

Beilstein J Nanotechnol 2020 8;11:597-605. Epub 2020 Apr 8.

Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41566, Republic of Korea.

Polyaniline-derived carbon (PDC) was obtained via pyrolysis of polyaniline under different temperatures and applied for the purification of water contaminated with dye molecules of different sizes and charge by adsorption. With increasing pyrolysis temperature, it was found that the hydrophobicity, pore size and mesopore volume increased. A mesoporous PDC sample obtained via pyrolysis at 900 °C showed remarkable performance in the adsorption of dye molecules, irrespective of dye charge, especially in the removal of bulky dye molecules, such as acid red 1 (AR1) and Janus green B (JGB). Read More

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http://dx.doi.org/10.3762/bjnano.11.47DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7155913PMC

Comparison of fresh and aged lithium iron phosphate cathodes using a tailored electrochemical strain microscopy technique.

Beilstein J Nanotechnol 2020 7;11:583-596. Epub 2020 Apr 7.

German Aerospace Center (DLR), Institute of Engineering Thermodynamics, Pfaffenwaldring 38-40, 70569 Stuttgart, Germany.

Electrochemical strain microscopy (ESM) is a powerful atomic force microscopy (AFM) mode for the investigation of ion dynamics and activities in energy storage materials. Here we compare the changes in commercial LiFePO cathodes due to ageing and its influence on the measured ESM signal. Additionally, the ESM signal dynamics are analysed to generate characteristic time constants of the diffusion process, induced by a dc-voltage pulse, which changes the ionic concentration in the material volume under the AFM tip. Read More

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http://dx.doi.org/10.3762/bjnano.11.46DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7155899PMC

Examination of the relationship between viscoelastic properties and the invasion of ovarian cancer cells by atomic force microscopy.

Beilstein J Nanotechnol 2020 6;11:568-582. Epub 2020 Apr 6.

Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou 350007, China.

The mechanical properties of cells could serve as an indicator for disease progression and early cancer diagnosis. This study utilized atomic force microscopy (AFM) to measure the viscoelastic properties of ovarian cancer cells and then examined the association with the invasion of ovarian cancer at the level of living single cells. Elasticity and viscosity of the ovarian cancer cells OVCAR-3 and HO-8910 are significantly lower than those of the human ovarian surface epithelial cell (HOSEpiC) control. Read More

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http://dx.doi.org/10.3762/bjnano.11.45DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7155897PMC

Identification of physicochemical properties that modulate nanoparticle aggregation in blood.

Beilstein J Nanotechnol 2020 3;11:550-567. Epub 2020 Apr 3.

Department of Chemistry, University of Torino, 10125 Torino, Italy.

Inorganic materials are receiving significant interest in medicine given their usefulness for therapeutic applications such as targeted drug delivery, active pharmaceutical carriers and medical imaging. However, poor knowledge of the side effects related to their use is an obstacle to clinical translation. For the development of molecular drugs, the concept of safe-by-design has become an efficient pharmaceutical strategy with the aim of reducing costs, which can also accelerate the translation into the market. Read More

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http://dx.doi.org/10.3762/bjnano.11.44DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7136551PMC

Correction: Photocatalytic antibacterial performance of TiO and Ag-doped TiO against and .

Beilstein J Nanotechnol 2020;11:547-549. Epub 2020 Apr 3.

Nanotechnology & Molecular Biology Lab, Centre of Biotechnology, University of Allahabad, Allahabad, Prayagraj, 211002, U.P., India.

[This corrects the article DOI: 10.3762/bjnano.4. Read More

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http://dx.doi.org/10.3762/bjnano.11.43DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7136558PMC

Luminescent gold nanoclusters for bioimaging applications.

Authors:
Nonappa

Beilstein J Nanotechnol 2020 30;11:533-546. Epub 2020 Mar 30.

Department of Applied Physics, Aalto University School of Science, Puumiehenkuja 2, FI-02150, Espoo, Finland.

Luminescent nanomaterials have emerged as attractive candidates for sensing, catalysis and bioimaging applications in recent years. For practical use in bioimaging, nanomaterials with high photoluminescence, quantum yield, photostability and large Stokes shifts are needed. While offering high photoluminescence and quantum yield, semiconductor quantum dots suffer from toxicity and are susceptible to oxidation. Read More

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http://dx.doi.org/10.3762/bjnano.11.42DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7136552PMC

Multilayer capsules made of weak polyelectrolytes: a review on the preparation, functionalization and applications in drug delivery.

Beilstein J Nanotechnol 2020 27;11:508-532. Epub 2020 Mar 27.

SRM Research Institute, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603203, India.

Multilayer capsules have been of great interest for scientists and medical communities in multidisciplinary fields of research, such as drug delivery, sensing, biomedicine, theranostics and gene therapy. The most essential attributes of a drug delivery system are considered to be multi-functionality and stimuli responsiveness against a range of external and internal stimuli. Apart from the highly explored strong polyelectrolytes, weak polyelectrolytes offer great versatility with a highly controllable architecture, unique stimuli responsiveness and easy tuning of the properties for intracellular delivery of cargo. Read More

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http://dx.doi.org/10.3762/bjnano.11.41DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7113543PMC

Evolution of Ag nanostructures created from thin films: UV-vis absorption and its theoretical predictions.

Beilstein J Nanotechnol 2020 25;11:494-507. Epub 2020 Mar 25.

Faculty of Applied Physics and Mathematics, Department of Solid State Physics, Gdansk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdansk, Poland.

Ag-based plasmonic nanostructures were manufactured by thermal annealing of thin metallic films. Structure and morphology were studied using scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS). SEM images show that the formation of nanostructures is influenced by the initial layer thickness as well as the temperature and the time of annealing. Read More

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http://dx.doi.org/10.3762/bjnano.11.40DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7113554PMC

Preparation and in vivo evaluation of glyco-gold nanoparticles carrying synthetic mycobacterial hexaarabinofuranoside.

Beilstein J Nanotechnol 2020 19;11:480-493. Epub 2020 Mar 19.

Laboratory of Immunochemistry, Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov 13, Saratov, 410049, Russia.

A number of bacterial glycans are specific markers for the detection and the serological identification of microorganisms and are also widely used as antigenic components of vaccines. The use of gold nanoparticles as carriers for glyco-epitopes is becoming an important alternative to the traditional conjugation with proteins and synthetic polymers. In this study, we aimed to prepare and evaluate in vivo glyco-gold nanoparticles (glyco-GNPs) bearing the terminal-branched hexaarabinofuranoside fragment (Ara) of arabinan domains of lipoarabinomannan and arabinogalactan, which are principal polysaccharides of the cell wall of , the causative agent of tuberculosis. Read More

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http://dx.doi.org/10.3762/bjnano.11.39DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7113550PMC
March 2020
2.326 Impact Factor

Interfacial charge transfer processes in 2D and 3D semiconducting hybrid perovskites: azobenzene as photoswitchable ligand.

Beilstein J Nanotechnol 2020 17;11:466-479. Epub 2020 Mar 17.

University of Konstanz, Universitätsstrasse 10, 78467 Konstanz, Germany.

In the vast majority of studies on semiconductor particles ligands or capping agents are used that bind to the surface of the particles covering them with an electrically insulating shell. Since the transport of charge carriers and/or energy across interfaces is desirable for a variety of applications, the use of π-conjugated ligands becomes increasingly interesting. Among them are compounds that react to external stimuli. Read More

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http://dx.doi.org/10.3762/bjnano.11.38DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7113553PMC

Current measurements in the intermittent-contact mode of atomic force microscopy using the Fourier method: a feasibility analysis.

Beilstein J Nanotechnol 2020 13;11:453-465. Epub 2020 Mar 13.

The George Washington University, Department of Mechanical and Aerospace Engineering, 800 22nd St. NW, Suite 3000, Washington, DC 20052, USA.

Atomic force microscopy (AFM) is an important tool for measuring a variety of nanoscale surface properties, such as topography, viscoelasticity, electrical potential and conductivity. Some of these properties are measured using contact methods (static contact or intermittent contact), while others are measured using noncontact methods. Some properties can be measured using different approaches. Read More

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http://dx.doi.org/10.3762/bjnano.11.37DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7082697PMC

Nanoarchitectonics: bottom-up creation of functional materials and systems.

Authors:
Katsuhiko Ariga

Beilstein J Nanotechnol 2020 12;11:450-452. Epub 2020 Mar 12.

WPI-MANA, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.

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http://dx.doi.org/10.3762/bjnano.11.36DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7082705PMC

Atomic-resolution imaging of rutile TiO(110)-(1 × 2) reconstructed surface by non-contact atomic force microscopy.

Beilstein J Nanotechnol 2020 10;11:443-449. Epub 2020 Mar 10.

Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan.

The structure of the rutile TiO(110)-(1 × 2) reconstructed surface is a phase induced by oxygen reduction. There is ongoing debate about the (1 × 2) reconstruction, because it cannot be clarified whether the (1 × 2) structure is formed over a wide area or only locally using macroscopic analysis methods such as diffraction. We used non-contact atomic force microscopy, scanning tunneling microscopy, and low-energy electron diffraction at room temperature to characterize the surface. Read More

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http://dx.doi.org/10.3762/bjnano.11.35DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7082707PMC

Electrochemically derived functionalized graphene for bulk production of hydrogen peroxide.

Beilstein J Nanotechnol 2020 9;11:432-442. Epub 2020 Mar 9.

Tata Institute of Fundamental Research - Hyderabad, Sy. No. 36/P, Gopanapally Village, Serilingampally Mandal, Hyderabad 500107, India.

On-site peroxide generation via electrochemical reduction is gaining tremendous attention due to its importance in many fields, including water treatment technologies. Oxidized graphitic carbon-based materials have been recently proposed as an alternative to metal-based catalysts in the electrochemical oxygen reduction reaction (ORR), and in this work we unravel the role of C=O groups in graphene towards sustainable peroxide formation. We demonstrate a versatile single-step electrochemical exfoliation of graphite to graphene with a controllable degree of oxygen functionalities and thickness, leading to the formation of large quantities of functionalized graphene with tunable rate parameters, such as the rate constant and exchange current density. Read More

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http://dx.doi.org/10.3762/bjnano.11.34DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7082696PMC
March 2020
2.326 Impact Factor

Nanoparticles based on the zwitterionic pillar[5]arene and Ag: synthesis, self-assembly and cytotoxicity in the human lung cancer cell line A549.

Beilstein J Nanotechnol 2020 5;11:421-431. Epub 2020 Mar 5.

Kazan Federal University, A.M. Butlerov Chemistry Institute, 420008 Kremlevskaya, 18, Kazan, Russian Federation.

For the first time, stable pillar[5]arene/Ag nanoparticles, consisting of water-soluble pillar[5]arene containing γ-sulfobetaine fragments and Ag ions without Ag-Ag bonds, were synthesized and characterized. The pillar[5]arene/Ag (ratio 1:10) nanoparticles obtained were cubic with a rib length of 100 nm and are less cytotoxic than Ag ions. The survival of the A549 model cells in the presence of pillar[5]arene/Ag (1:10) nanoparticles at a concentration of 30 and 40 μM was 76% and 55%, while in the absence of pillar[5]arene, the cell survival for free Ag ions at the same concentration was 30% and 10%, respectively. Read More

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http://dx.doi.org/10.3762/bjnano.11.33DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7082700PMC

High dynamic resistance elements based on a Josephson junction array.

Beilstein J Nanotechnol 2020 3;11:417-420. Epub 2020 Mar 3.

VTT Technical Research Centre of Finland Ltd., 02150 Espoo, Finland.

A chain of superconductor-insulator-superconductor junctions based on Al-AlO -Al nanostructures and fabricated using conventional lift-off lithography techniques was measured at ultra-low temperatures. At zero magnetic field, the low current bias dynamic resistance can reach values of ≈10 Ω. It was demonstrated that the system can provide a decent quality current biasing circuit, enabling the observation of Coulomb blockade and Bloch oscillations in ultra-narrow Ti nanowires associated with the quantum phase-slip effect. Read More

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http://dx.doi.org/10.3762/bjnano.11.32DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7082698PMC

Synthesis and enhanced photocatalytic performance of 0D/2D CuO/tourmaline composite photocatalysts.

Beilstein J Nanotechnol 2020 2;11:407-416. Epub 2020 Mar 2.

Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221, USA.

Photocatalysis is considered to be a green and promising technology for transforming organic contaminants into nontoxic products. In this work, a CuO/tourmaline composite with zero-dimensional/two-dimensional (0D/2D) CuO architecture was successfully obtained via a facile hydrothermal process, and its photocatalytic activity was evaluated by the degradation of methylene blue (MB). Surface element valence state and molecular vibration characterization revealed that CuO chemically interacted with tourmaline via Si-O-Cu bonds. Read More

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http://dx.doi.org/10.3762/bjnano.11.31DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7082706PMC