84,656 results match your criteria Nanotechnology Science and Applications [Journal]


Effect of symmetry and metal nanoparticles on the photophysicochemical and photodynamic therapy properties of cinnamic acid zinc phthalocyanine.

Spectrochim Acta A Mol Biomol Spectrosc 2019 Feb 5;214:49-57. Epub 2019 Feb 5.

Centre for Nanotechnology Innovation, Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa. Electronic address:

In this study, a novel asymmetric cinnamic acid zinc phthalocyanine (ZnPc, 1) containing three tert-butyl substituents is reported. The asymmetric ZnPc (1) is further linked to amino functionalized magnetic nanoparticles (AMNPs) (1-AMNPs) and to cysteine functionalized silver nanoparticles (cys-AgNPs) (1-cys-AgNPs) through an amide bond. 1-AMNPs and 1-cys-AgNPs improved the triplet and singlet oxygen quantum yields of complex 1, this was also observed with the previously reported 2-AMNPs when compared to 2 while 3-AMNPs yielded an unexpected decrease in triplet quantum yield as compared to 3. Read More

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http://dx.doi.org/10.1016/j.saa.2019.02.005DOI Listing
February 2019

Enhanced fluoride removal by hierarchically porous carbon foam monolith with high loading of UiO-66.

J Colloid Interface Sci 2019 Feb 7;542:269-280. Epub 2019 Feb 7.

Key Laboratory of Materials Physics, Centre for Environmental and Energy Nanomaterials, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Centre for Excellence in Nanoscience, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China. Electronic address:

Environmental concern associated with excess fluoride has intrigued the unceasing exploration of new multifunctional hybrid materials to mitigate any undesirable consequence to human health. Herein, a novel hybrid monolith has been successfully fabricated via a facile in-situ growth strategy for highly efficient defluoridation from contaminated waters, in which homogeneously dispersed UiO-66 particles are perfectly anchored on three dimensional (3D) porous carbon foam (CF). Benefiting from fully exposed active sites, excellent pore accessibility and efficient mass transport, the integrated UiO-66/CF hybrid monolith exhibits fast adsorption kinetics, and outstanding uptake capacity toward fluoride as high as 295 mg g, which greatly outperforms the previously reported adsorbents. Read More

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http://dx.doi.org/10.1016/j.jcis.2019.02.027DOI Listing
February 2019

Aptamer-functionalized liposomes for targeted cancer therapy.

Cancer Lett 2019 Feb 11. Epub 2019 Feb 11.

Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Neurogenic Inflammation Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran. Electronic address:

Accumulation of chemotherapeutic agents in the tumor tissue while reducing adverse effects and drug resistance are among the major goals in cancer therapy. Among nanocarriers, liposomes have been found to be more effective in the passive targeting of cancer cells. A promising recent development in targeted drug delivery is the use of aptamer-functionalized liposomes for cancer therapy. Read More

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http://dx.doi.org/10.1016/j.canlet.2019.01.045DOI Listing
February 2019

Core-matched nanoassemblies for targeted co-delivery of Chemotherapy and Photosensitizer to treat drug-resistant cancer.

Acta Biomater 2019 Feb 11. Epub 2019 Feb 11.

Department of Pharmacy, Pudong Hospital, Fudan University, 2800 Gongwei Road, Shanghai 201399, PR China; Key Laboratory of Smart Drug Delivery, Ministry of Education, School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, PR China. Electronic address:

Emergence of drug resistance in tumors causes therapeutic failure or tumor relapse. Combination of chemotherapy and photodynamic therapy holds significant promise to treat drug-resistant tumors. However, stubborn hydrophobicity of photosensitizer (PS), low encapsulation efficiency and leaking problem of PS in organic carrier, and disparate physicochemical properties of PS and chemotherapeutics make the combination unachievable. Read More

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http://dx.doi.org/10.1016/j.actbio.2019.02.009DOI Listing
February 2019

Involvement of planned cell death of necroptosis in cancer treatment by nanomaterials: Recent advances and future perspectives.

J Control Release 2019 Feb 11. Epub 2019 Feb 11.

Department of Nanotechnology, Faculty of Advanced Sciences and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran. Electronic address:

With the expansion of the field of nanomedicine, the use of nanomaterials in cancer treatment has raised questions about their safety and unpredictable adverse effects. To date, the hazardous effects of nanomaterials have been investigated based on cell survival and cellular functionality, such as membrane integrity, mitochondrial activity and cell morphology. It is increasingly noted that more detailed analysis of regulated cell death pathways (RCD) triggered by nanomaterials is essential to understand their full mechanism of action. Read More

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http://dx.doi.org/10.1016/j.jconrel.2019.02.007DOI Listing
February 2019

Blue light-dependent human magnetoreception in geomagnetic food orientation.

PLoS One 2019 14;14(2):e0211826. Epub 2019 Feb 14.

Department of Electrical and Electronic Engineering, Institute for IT Convergence, Hankyong National University, Anseong, Republic of Korea.

The Earth's geomagnetic field (GMF) is known to influence magnetoreceptive creatures, from bacteria to mammals as a sensory cue or a physiological modulator, despite it is largely thought that humans cannot sense the GMF. Here, we show that humans sense the GMF to orient their direction toward food in a self-rotatory chair experiment. Starved men, but not women, significantly oriented toward the ambient/modulated magnetic north or east, directions which had been previously food-associated, without any other helpful cues, including sight and sound. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0211826PLOS
February 2019

Synthesis of Cyclopenta-HBCs and their Regioselective Chlorination During Oxidative Cyclodehydrogenation.

Chem Asian J 2019 Feb 14. Epub 2019 Feb 14.

MacDiarmid Institute for Advanced Materials and Nanotechnology, Department of Chemistry, University of Otago, Dunedin, 9016, New Zealand.

Hexa-peri-hexabenzocoronenes with a bay-fused five-membered ring are synthesized from fluorenyl precursors. The key oxidative cyclodehydrogenation step is accompanied by regioselective chlorination that is enhanced by methylation at the cyclopenta-ring or increased reaction concentration. The CpHBC products undergo mild electrophilic aromatic bromination, without catalyst, to afford adducts suitable for π-extension by cross-coupling. Read More

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http://dx.doi.org/10.1002/asia.201801812DOI Listing
February 2019

Recent Progress in Aromatic Polyimide Dielectrics for Organic Electronic Devices and Circuits.

Adv Mater 2019 Feb 14:e1806070. Epub 2019 Feb 14.

Physikalisches Institut, Westfälische Wilhelms-Universität, Wilhelm-Klemm-Straße 10, 48149, Münster, Germany.

Polymeric dielectrics play a key role in the realization of flexible organic electronics, especially for the fabrication of scalable device arrays and integrated circuits. Among a wide variety of polymeric dielectric materials, aromatic polyimides (PIs) are flexible, lightweight, and strongly resistant to high-temperature processing and corrosive etchants and, therefore, have become promising candidates as gate dielectrics with good feasibility in manufacturing organic electronic devices. More significantly, the characteristics of PIs can be conveniently modulated by the design of their chemical structures. Read More

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http://dx.doi.org/10.1002/adma.201806070DOI Listing
February 2019

Molecular Imprinting with Functional DNA.

Small 2019 Feb 13:e1805246. Epub 2019 Feb 13.

Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada.

Molecular imprinting refers to templated polymerization with rationally designed monomers, and this is a general method to prepare stable and cost-effective ligands. This attractive concept however suffers from low affinity, low specificity, and limited signaling mechanisms for binding. Acrydite-modified DNA oligonucleotides can be readily copolymerized into acrylic polymers. Read More

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http://dx.doi.org/10.1002/smll.201805246DOI Listing
February 2019

Pulsed Laser Modulated Shock Transition from Liquid Metal Nanoparticles to Mechanically and Thermally Robust Solid-Liquid Patterns.

Adv Mater 2019 Feb 13:e1807811. Epub 2019 Feb 13.

School of Industrial Engineering, Purdue University, West Lafayette, IN, 47907, USA.

In this work, a general mechanism is discovered to form liquid-metal-based, stable and stretchable conductive patterns on rigid and soft substrates. It is discovered that pulsed laser irradiation of liquid metal nanoparticles (LMNPs) with tunable conditions can induce transformation to stable and stretchable solid-liquid (S-L) dual phases on various surfaces. Formation of this unique solid-liquid composite phase is the key to change the wetting behavior of the conductive patterns on various substrates and enables mechanically stable patterns on various substrates. Read More

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http://dx.doi.org/10.1002/adma.201807811DOI Listing
February 2019

Oral administration of nanomicelle curcumin in the prevention of radiotherapy-induced mucositis in head and neck cancers.

Spec Care Dentist 2019 Feb 14. Epub 2019 Feb 14.

Department of New Science and Technologies, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.

Oral mucositis (OM) is a complication of head and neck cancer (HNC) therapy with negative impact on the quality of life. Although definitive treatment has not yet been established, there is interest towards the use of natural compounds owing to their few side effects. Curcumin has a variety of biological and pharmacological properties including anticancer and anti-inflammatory effects. Read More

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http://dx.doi.org/10.1111/scd.12358DOI Listing
February 2019

Xylan from Pineapple Stem Waste: a Potential Biopolymer for Colonic Targeting of Anti-inflammatory Agent Mesalamine.

AAPS PharmSciTech 2019 Feb 13;20(3):112. Epub 2019 Feb 13.

School of Pharmacy, Research Center for Nanosciences and Nanotechnology, Bandung Institute of Technology, Ganesha 10, Bandung, 40132, Indonesia.

We have successfully conjugated mesalamine (5-aminosalicylic acid, 5-ASA) with xylan, a biopolymer isolated from pineapple stem waste, to form xylan-5-ASA conjugate. The biopolymer was used to provide colon-targeting properties for 5-ASA, a golden standard anti-inflammatory agent commonly used for ulcerative colitis treatment. A series of data from FTIR spectroscopy, UV-Vis spectrophotometry, and HPLC confirmed the xylan-5-ASA conjugate formation. Read More

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http://dx.doi.org/10.1208/s12249-018-1205-yDOI Listing
February 2019

Emerging approaches and technologies in transplantation: the potential game changers.

Cell Mol Immunol 2019 Feb 13. Epub 2019 Feb 13.

Division of Nephrology, Department of Medicine, Duke University Medical Center, Durham, NC, USA.

Newly emerging technologies are rapidly changing conventional approaches to organ transplantation. In the modern era, the key challenges to transplantation include (1) how to best individualize and possibly eliminate the need for life-long immunosuppression and (2) how to expand the donor pool suitable for human transplantation. This article aims to provide readers with an updated review of three new technologies that address these challenges. Read More

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http://dx.doi.org/10.1038/s41423-019-0207-3DOI Listing
February 2019

The cyclic peptide labaditin does not alter the outer membrane integrity of Salmonella enterica serovar Typhimurium.

Sci Rep 2019 Feb 13;9(1):1993. Epub 2019 Feb 13.

São Carlos Institute of Physics, University of São Paulo, CP 369, 13560-970, São Carlos-SP, Brazil.

Antimicrobial peptides are a promising class of new antibiotics with the ability to kill bacteria by disrupting their cell membrane, which is especially difficult for Gram-negative bacteria whose cell wall contains an outer layer of lipopolysaccharides (LPS). Here we show that the cyclic decapeptide Labaditin (Lo), with proven activity against the Gram-positive Staphylococcus aureus and Streptococcus mutans, is not able to kill the Gram-negative Salmonella enterica serovar Typhimurium (S.e. Read More

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http://www.nature.com/articles/s41598-019-38551-5
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http://dx.doi.org/10.1038/s41598-019-38551-5DOI Listing
February 2019
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Field-Tunable 0-π-Transitions in SnTe Topological Crystalline Insulator SQUIDs.

Sci Rep 2019 Feb 13;9(1):1987. Epub 2019 Feb 13.

Institut Néel, CNRS and University Grenoble-Alpes, 25 Rue des Martyrs, F-38042, Grenoble, France.

The manifestation of spin-orbit interactions, long known to dramatically affect the band structure of heavy-element compounds, governs the physics in the surging class of topological matter. A particular example is found in the new family of topological crystalline insulators. In this systems transport occurs at the surfaces and spin-momentum locking yields crystal-symmetry protected spin-polarized transport. Read More

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http://dx.doi.org/10.1038/s41598-018-38008-1DOI Listing
February 2019

Nanotoxicity of engineered nanomaterials (ENMs) to environmentally relevant beneficial soil bacteria - a critical review.

Nanotoxicology 2019 Feb 14:1-37. Epub 2019 Feb 14.

a Rhizosphere Science Laboratory, Department of Plant and Soil Sciences , University of Kentucky , Lexington , KY , USA.

Deposition of engineered nanomaterials (ENMs) in various environmental compartments is projected to continue rising exponentially. Terrestrial environments are expected to be the largest repository for environmentally released ENMs. Because ENMs are enriched in biosolids during wastewater treatment, agriculturally applied biosolids facilitate ENM exposure of key soil micro-organisms, such as plant growth-promoting rhizobacteria (PGPR). Read More

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http://dx.doi.org/10.1080/17435390.2018.1530391DOI Listing
February 2019

Conventional Rehabilitation Therapy Versus Telerehabilitation in Cardiac Patients: A Comparison of Motivation, Psychological Distress, and Quality of Life.

Int J Environ Res Public Health 2019 Feb 12;16(3). Epub 2019 Feb 12.

Laboratory of Welfare Technologies - Telehealth and Telerehabilitation, Department of Health Science and Technology, Aalborg University, 9200 Aalborg East, Denmark.

Telerehabilitation (TR) has gained attention as a promising rehabilitation format. Our study examined how patients responded to TR and whether it provided adequate support for their lifestyle changes and self-care efforts when compared to conventional rehabilitation (CR). Cardiac patients ( = 136) were randomly assigned to a TR or CR group. Read More

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http://dx.doi.org/10.3390/ijerph16030512DOI Listing
February 2019

Early development of apoplastic barriers and molecular mechanisms in juvenile maize roots in response to LaO nanoparticles.

Sci Total Environ 2019 Feb 30;653:675-683. Epub 2018 Oct 30.

Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, United States. Electronic address:

The increasing occurrence of engineered nanoparticles (NPs) in soils may decrease water uptake in crops, followed by lower crop yield and quality. As one of the most common rare earth oxide NPs, lanthanum oxide (LaO) NPs may inhibit the relative expressions of aquaporin genes, thus reduce water uptake. In the present study, maize plants were exposed to different LaO NPs concentrations (0, 5, 50 mg L) for 72 h and 144 h right after the first leaf extended completely. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2018.10.320DOI Listing
February 2019

Modification of block copolymer lithography masks by O2/Ar plasma treatment: Insights from lift-off experiments, nanopore etching and free membranes.

Nanotechnology 2019 Feb 13. Epub 2019 Feb 13.

Dept. of Physics, Universitat Paderborn, Paderborn, Nordrhein-Westfalen, GERMANY.

Block copolymer (BCP) lithography allows for the large-area patterning of surfaces with self-assembled nanoscale features. The created nanostructured polymer films can be applied as masks in common lithography processing steps, such as lift-off and etching for pattern replication and transfer. In this work, we discuss an approach to improve the pattern replication efficiency by modification of the polymer mask prior to lithographical use by means of an O<sub>2</sub>/Ar plasma treatment. Read More

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http://dx.doi.org/10.1088/1361-6528/ab06ddDOI Listing
February 2019

Effects of surface and twinning energies on twining-superlattice formation in group III-V semiconductor nanowires: a first-principles study.

Nanotechnology 2019 Feb 13. Epub 2019 Feb 13.

Department of Physics Engineering, Mie University, Tsu, JAPAN.

The formation of twin plane superlattice in group III-V semiconductor nanowires (NWs) is analyzed by considering two dimensional nucleation using surface and twinning energies obtained by performing electronic structure calculations within density functional theory. The calculations for GaP, GaAs, InP, and InAs demonstrate that surface energies strongly depend on the growth conditions such as temperature and pressure during the epitaxial growth. Furthermore, the calculated twinning energies are found to be much smaller than previously estimated values by the dissociation width of edge dislocations, which lead to smaller segment length. Read More

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http://dx.doi.org/10.1088/1361-6528/ab06d0DOI Listing
February 2019

When Evolution Works Against the Future: Disgust's Contributions to the Acceptance of New Food Technologies.

Risk Anal 2019 Feb 13. Epub 2019 Feb 13.

Institute for Environmental Decisions, Consumer Behaviour, ETH Zurich, Zurich, Switzerland.

New food technologies have a high potential to transform the current resource-consuming food system to a more efficient and sustainable one, but public acceptance of new food technologies is rather low. Such an avoidance might be maintained by a deeply preserved risk avoidance system called disgust. In an online survey, participants (N = 313) received information about a variety of new food technology applications (i. Read More

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http://dx.doi.org/10.1111/risa.13279DOI Listing
February 2019

Comparative RNA editing profile of mitochondrial transcripts in cytoplasmic male sterile and fertile pigeonpea reveal significant changes at the protein level.

Mol Biol Rep 2019 Feb 13. Epub 2019 Feb 13.

ICAR-National Research Centre on Plant Biotechnology, New Delhi, 110012, India.

RNA editing is a process which leads to post-transcriptional alteration of the nucleotide sequence of the corresponding mRNA molecule which may or may not lead to changes at the protein level. Apart from its role in providing variability at the transcript and protein levels, sometimes, such changes may lead to abnormal expression of the mitochondrial gene leading to a cytoplasmic male sterile phenotype. Here we report the editing status of 20 major mitochondrial transcripts in both male sterile (AKCMS11) and male fertile (AKPR303) pigeonpea genotypes. Read More

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http://dx.doi.org/10.1007/s11033-019-04657-2DOI Listing
February 2019

Photobleaching Comparison of R-Phycoerythrin-Streptavidin and Streptavidin-Alexa Fluor 568 in a Breast Cancer Cell Line.

Monoclon Antib Immunodiagn Immunother 2019 Feb 13. Epub 2019 Feb 13.

1 Nanotechnology Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.

Fluorescent dyes are excited by light and emit light at a longer wavelength. Photobleaching is one the most important obstacles in fluorescent image capturing. Photochemical alteration of a fluorescent dye caused by several excitation/emission cycles results in a fluorophore to be unable to emit light. Read More

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http://dx.doi.org/10.1089/mab.2018.0046DOI Listing
February 2019

Engineering Nanowire-Mediated Cell Lysis for Microbial Cell Identification.

ACS Nano 2019 Feb 13. Epub 2019 Feb 13.

Health Research Institute , National Institute of Advanced Industrial Science and Technology (AIST) , Takamatsu 761-0395 , Japan.

Researchers have demonstrated great promise for inorganic nanowire use in analyzing cells or intracellular components. Although a stealth effect of nanowires toward cell surfaces allows preservation of the living intact cells when analyzing cells, as a completely opposite approach, the applicability to analyze intracellular components through disrupting cells is also central to understanding cellular information. However, the reported lysis strategy is insufficient for microbial cell lysis due to the cell robustness and wrong approach taken so far ( i. Read More

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http://dx.doi.org/10.1021/acsnano.8b08959DOI Listing
February 2019

An All-Optical Excitonic Switch Operated in the Liquid and Solid Phases.

ACS Nano 2019 Feb 13. Epub 2019 Feb 13.

The excitonic circuitry found in photosynthetic organisms suggests an alternative to electronic circuits, but the assembly of optically active molecules to fabricate even simple excitonic devices has been hampered by the limited availability of suitable molecular scale assembly technologies. Here we have designed and operated a hybrid all-optical excitonic switch comprised of donor/acceptor chromophores and photochromic nucleotide modulators assembled with nanometer scale precision using DNA nanotechnology. The all-optical excitonic switch was operated successfully in both liquid and solid phases, exhibiting high ON/OFF switching contrast with no apparent cyclic fatigue through nearly 200 cycles. Read More

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http://dx.doi.org/10.1021/acsnano.8b07504DOI Listing
February 2019

Small heat shock proteins: multifaceted proteins with important implications for life.

Cell Stress Chaperones 2019 Feb 13. Epub 2019 Feb 13.

Laboratory of Cell and Developmental Genetics, IBIS, and Department of Molecular Biology, Medical Biochemistry and Pathology, Medical School, Université Laval, QC, Québec, G1V 0A6, Canada.

Small Heat Shock Proteins (sHSPs) evolved early in the history of life; they are present in archaea, bacteria, and eukaryota. sHSPs belong to the superfamily of molecular chaperones: they are components of the cellular protein quality control machinery and are thought to act as the first line of defense against conditions that endanger the cellular proteome. In plants, sHSPs protect cells against abiotic stresses, providing innovative targets for sustainable agricultural production. Read More

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http://dx.doi.org/10.1007/s12192-019-00979-zDOI Listing
February 2019

Two dimensional MoS meets porphyrins via intercalation to enhance the electrocatalytic activity toward hydrogen evolution.

Nanoscale 2019 Feb 13. Epub 2019 Feb 13.

Department of Nano and Advanced Materials, Jeonju University, Chonju, Chonbuk 55069, Republic of Korea.

Two-dimensional MoS2 meets porphyrin molecules to form unique 1T' phase intercalated complexes via a one-step procedure of hydrothermal reactions. The resultant Mn-porphyrin-MoS2 exhibits excellent electrocatalytic activity toward the hydrogen evolution reaction, with a Tafel slope of 35 mV dec-1 and 10 mA cm-2 at an overpotential of 0.125 V. Read More

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http://dx.doi.org/10.1039/c8nr10165eDOI Listing
February 2019

Biological applications of terahertz technology based on nanomaterials and nanostructures.

Nanoscale 2019 Feb 13. Epub 2019 Feb 13.

College of Biosystems Engineering and Food Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, P.R. China.

Terahertz (THz) technology is now drawing increasing attention around the world; it has been considered as an efficient non-destructive, non-contact and label-free optical method for biological detection. In this field, nanomaterials and nanostructures have been constantly advancing the development of THz technology. Here, we proposed some latest applications of nanotechnology to improve THz biological detection capability for providing progressive THz systems, thus enabling outstanding detection performance utilizing THz spectroscopy and imaging; these will encourage broader interest in various fields. Read More

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http://dx.doi.org/10.1039/c8nr08676aDOI Listing
February 2019

Macrophages restrict the nephrogenic field and promote endothelial connections during kidney development.

Elife 2019 Feb 13;8. Epub 2019 Feb 13.

Centre for Discovery Brain Sciences, The University of Edinburgh, Edinburgh, United Kingdom.

The origins and functions of kidney macrophages in the adult have been explored, but their roles during development remain largely unknown. Here we characterise macrophage arrival, localisation, heterogeneity, and functions during kidney organogenesis. Using genetic approaches to ablate macrophages, we identify a role for macrophages in nephron progenitor cell clearance as mouse kidney development begins. Read More

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http://dx.doi.org/10.7554/eLife.43271DOI Listing
February 2019

Water adsorption, dissociation and oxidation on SrTiO and ferroelectric surfaces revealed by ambient pressure X-ray photoelectron spectroscopy.

Phys Chem Chem Phys 2019 Feb 13. Epub 2019 Feb 13.

Institut de Ciència de Materials de Barcelona ICMAB-CSIC, Campus de la UAB, E-08193 Bellaterra, Spain.

Water dissociation on oxides is of great interest because its fundamental aspects are still not well understood and it has implications in many processes, from ferroelectric polarization screening phenomena to surface catalysis and surface chemistry on oxides. In situ water dissociation and redox processes on metal oxide perovskites which easily expose TiO2-terminated surfaces, such as SrTiO3, BaTiO3 or Pb(Zr,Ti)O3, are studied by ambient pressure XPS, as a function of water vapour pressure. From the analysis of the O1s spectrum, we determine the presence of different types of oxygen based species, from hydroxyl groups, either bound to Ti4+ and metal sites or lattice oxygen, to different peroxide compounds, and propose a model for the adsorbate layer composition, valid for environmental conditions. Read More

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http://dx.doi.org/10.1039/c8cp07632dDOI Listing
February 2019

Probing a dipeptide-based supramolecular assembly as an efficient camptothecin delivering carrier for cancer therapy: computational simulations and experimental validations.

Nanoscale 2019 Feb 13. Epub 2019 Feb 13.

Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, Liaoning 110016, P. R. China.

Short peptide-based supramolecular assemblies have drawn much attention in the field of drug delivery. However, the progress still remains limited owing to the inefficient drug loading capacity of conventional short peptide-based materials. In this study, based on coordinated intramolecular π-π stacking, we customize a dipeptide-based rhein derivative (rhein-diphenylalanine peptide, RDP), which could spontaneously form spherical nanoassemblies for drug delivery. Read More

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http://dx.doi.org/10.1039/c8nr07014hDOI Listing
February 2019

Effect of Br content on phase stability and performance of HN=CHNHPb(I Br ) perovskite thin films.

Nanotechnology 2019 Apr 13;30(16):165402. Epub 2019 Feb 13.

State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, People's Republic of China.

Pristine and Br-doped HN = CHNHPb(I Br ) (FAPb(I Br ), Br content x = 0, 0.05, 0.15, 0. Read More

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http://dx.doi.org/10.1088/1361-6528/aafeb6DOI Listing

Use of cerium oxide nanoparticles: a good candidate to improve skin tissue engineering.

Biomed Mater 2019 Feb 12. Epub 2019 Feb 12.

Ferdowsi University of Mashhad, Mashhad, Razavi Khorasan, Iran (the Islamic Republic of).

Today advancements in nanotechnology have made extensive progress in tissue engineering. Application of cerium oxide nanoparticles (CeO2) has improved regenerative medicine due to their antioxidant properties. In this study, nanoparticles were used to increase the efficacy of skin substitutes. Read More

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http://dx.doi.org/10.1088/1748-605X/ab0679DOI Listing
February 2019

Nanoplasmonic response of porous Au-TiO2 thin films prepared by oblique angle deposition.

Nanotechnology 2019 Feb 12. Epub 2019 Feb 12.

Physics Department, Universidade do Minho, Braga, PORTUGAL.

In this work, a versatile method is proposed to increase the sensitivity of optical sensors based on the localized surface plasmon resonance (LSPR) phenomenon. It combines a physical deposition method with the Oblique Angle Deposition (OAD) technique, allowing the preparation of plasmonic thin films with tailored porosity. Thin films of Au-TiO<sub>2</sub> were deposited by reactive magnetron sputtering in a 3D nanostructure (zigzag growth), at different incidence angles (0º ≤ α ≤ 80º), followed by in-air thermal annealing at 400 ºC to induce the growth of the Au nanoparticles. Read More

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http://dx.doi.org/10.1088/1361-6528/ab068eDOI Listing
February 2019
2 Reads

Novel mesoporous electrode materials for symmetric, asymmetric and hybrid supercapacitors.

Nanotechnology 2019 Feb 12. Epub 2019 Feb 12.

NanoScience Technology Center, University of Central Florida - College of Optics and Photonics, Orlando, UNITED STATES.

Electrochemical capacitors or supercapacitors have achieved great interest in the recent past due to their potential applications ranging from microelectronic devices to hybrid electric vehicles. Supercapacitors can provide high power densities but their inherently low energy density remains a great challenge. The high-performance supercapacitors utilize large electrode surface area for electrochemical double-layer capacitance and/or pseudocapacitance. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0685DOI Listing
February 2019

Synthesis and colloidal characterization of folic acid-modified PEG-b-PCL Micelles for methotrexate delivery.

Colloids Surf B Biointerfaces 2019 Feb 6;177:228-234. Epub 2019 Feb 6.

Department of Physical Chemistry, Institute of Chemistry, São Paulo State University (UNESP), Araraquara, SP, 14801-970, Brazil.

Hydrophobic drugs, such as methotrexate, are not easily delivered into the human body. Therefore, the use of amphiphilic nanoplatforms to the transport of these drugs through the bloodstream is a challenge. While the hydrophobic region interacts with the drug, the hydrophilic outer layer enhances its bioavailability and circulation time. Read More

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http://dx.doi.org/10.1016/j.colsurfb.2019.02.008DOI Listing
February 2019

A novel nanoformulation of α-eleostearic acid restores molecular pathogenesis of hypersensitivity.

Nanomedicine (Lond) 2019 Feb 12. Epub 2019 Feb 12.

Laboratory of Food Science & Technology, Food & Nutrition Division, University of Calcutta, 20 B Judges Court Road, Kolkata 700 027, West Bengal, India.

Aim: The present work provides first-time empirical and molecular interaction evidence to establish the higher biofunctionality of a therapeutic lipid, α-eleostearic acid (ESA), encapsulated in a novel and thoroughly characterized biocompatible nanoemulsion (NE) system (particle size <200 nm).

Materials & Methods: A novel methodology was employed to fabricate novel formulations of ESA. Molecular biological tools and assays were used to arrive at definite conclusions. Read More

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http://dx.doi.org/10.2217/nnm-2018-0450DOI Listing
February 2019
5.413 Impact Factor

P-N Junction Diode Using Plasma Boron-Doped Black Phosphorus for High-Performance Photovoltaic Devices.

ACS Nano 2019 Feb 14. Epub 2019 Feb 14.

Department of Physics , Yonsei University , Seoul 03722 , Republic of Korea.

This study used a spatially controlled boron-doping technique that enables a p-n junction diode to be realized within a single 2D black phosphorus (BP) nanosheet for high-performance photovoltaic application. The reliability of the BP surface and state-of-the-art 2D p-n heterostructure's gated junctions was obtained using the controllable pulsed-plasma process technique. Chemical and structural analyses of the boron-doped BP were performed using X-ray photoelectron spectroscopy, transmission electron microscopy, and first-principles density functional theory (DFT) calculations, and the electrical characteristics of a field-effect transistor based on the p-n heterostructure were determined. Read More

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http://dx.doi.org/10.1021/acsnano.8b07730DOI Listing
February 2019

Assembly, disassembly and reassembly: a "top-down" synthetic strategy towards hybrid, mixed-metal {MoCo} POM clusters.

Dalton Trans 2019 Feb 12. Epub 2019 Feb 12.

School of Chemistry and CRANN, Trinity College Dublin, College Green, Dublin 2, Ireland.

Polyoxometalates (POMs) are commonly prepared using a "bottom-up" synthetic procedure. The alternative "top-down" approach of disassembling a pre-formed POM unit to generate new synthetic intermediates is promising, but relatively comparatively underused. In this paper, a rationale for the top-down method is provided, demonstrating that this approach can generate compounds that are fundamentally inaccessible from simple bottom-up assembly. Read More

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http://dx.doi.org/10.1039/c9dt00075eDOI Listing
February 2019

Observation of uncompensated bound charges at improper ferroelectric domain walls.

Nano Lett 2019 Feb 12. Epub 2019 Feb 12.

Low-temperature electrostatic force microscopy (EFM) is used to probe unconventional domain walls in the improper ferroelectric semiconductor Er$_{0.99}$Ca$_{0.01}$MnO$_3$ down to cryogenic temperatures. Read More

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http://dx.doi.org/10.1021/acs.nanolett.8b04608DOI Listing
February 2019

A High-throughput Off-chip Microdroplet Generator Enabled by a Spinning Conical Frustum.

Anal Chem 2019 Feb 12. Epub 2019 Feb 12.

Despite that droplet-based microfluidics has been broadly used as a versatile tool in biology, chemistry and nanotechnology, its rather complicated microfabrication process and the requirement of specialized hardware and operating skills hinder researchers to fully unleash the potential of this powerful platform. Here, we develop an integrated microdroplet generator enabled by a spinning conical frustum for the versatile production of near-monodisperse microdroplets in a high-throughput and off-chip manner. The construction and operation of this generator are simple and straightforward without the need of microfabrication, and we demonstrate that the generator is able to passively and actively control the size of the produced microdroplets. Read More

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http://dx.doi.org/10.1021/acs.analchem.9b00093DOI Listing
February 2019

Impact of gold nanoparticles shape on their cytotoxicity against human osteoblast and osteosarcoma in in vitro model. Evaluation of the safety of use and anti-cancer potential.

J Mater Sci Mater Med 2019 Feb 12;30(2):22. Epub 2019 Feb 12.

Department of Medical Chemistry, Medical University of Gdansk, Debinki 1, 80-211, Gdansk, Poland.

Due to development of nanotechnology and gold nanoparticles (AuNPs) increasing use in different areas of medicine, especially in oncology, better understanding of their potential cytotoxicity is necessary to protect patients safety. Shape and size of AuNPs is an important modulator of their cytotoxicity. Therefore, we investigated the cytotoxicity of AuNPs rods (≈39 nm length, 18 nm width), AuNPs stars (≈ 215 nm) and AuNPs spheres (≈ 6. Read More

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http://dx.doi.org/10.1007/s10856-019-6221-2DOI Listing
February 2019

Cancer Therapy Based on Smart Drug Delivery with Advanced Nanoparticles.

Anticancer Agents Med Chem 2019 Feb 12. Epub 2019 Feb 12.

Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, 410013. China.

Background: Cancer, as one of the most dangerous disease, had caused millions of deaths every year. The main reason is the vacancy of an effective and thorough treatment. The avocations of drug delivery systems had significantly reduced the side-effect of chemotherapy. Read More

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http://dx.doi.org/10.2174/1871520619666190212124944DOI Listing
February 2019

Electrospun triple-layered PLLA/gelatin. PRGF/PLLA scaffold induces fibroblast migration.

J Cell Biochem 2019 Feb 11. Epub 2019 Feb 11.

Department of Tissue engineering and Applied Cell Sciences, School Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

The function of fibroblast cells in wounded areas results in reconstruction of the extra cellular matrix and consequently resolution of granulation tissue. It is suggested that the use of platelet-rich plasma can accelerate the healing process in nonhealing or slow-healing wounds. In this study, a simple and novel method has been used to fabricate an electrospun three-layered scaffold containing plasma rich in growth factor with the aim of increasing the proliferation and migration of fibroblast cells in vitro. Read More

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http://dx.doi.org/10.1002/jcb.28422DOI Listing
February 2019

Effect of 3-D distribution of ZVI nanoparticles confined in polymeric anion exchanger on EDTA-chelated Cu(II) removal.

Environ Sci Pollut Res Int 2019 Feb 11. Epub 2019 Feb 11.

State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, People's Republic of China.

Millispherical nanocomposites are promising for water decontamination combining the high reactivity of the confined nanoparticles and the excellent hydrodynamic properties of the supporting host. However, the effect of three-dimensional (3-D) distribution of the nanoparticles inside the host on the performance of the nanocomposite was highly dependent on the specific decontamination process. In this study, four D201-ZVI nanocomposites from peripheral to uniform 3-D distributions of nZVI were prepared to evaluate the effect of 3-D distribution of the confined nanoparticles inside the host beads on the removal of EDTA-chelated Cu(II). Read More

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http://dx.doi.org/10.1007/s11356-019-04451-4DOI Listing
February 2019

Polymorphism of bulk boron nitride.

Sci Adv 2019 Jan 18;5(1):eaau5832. Epub 2019 Jan 18.

Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, QLD 4111, Australia.

Boron nitride (BN) is a material with outstanding technological promise due to its exceptional thermochemical stability, structural, electronic, and thermal conductivity properties, and extreme hardness. Yet, the relative thermodynamic stability of its most common polymorphs (diamond-like cubic and graphite-like hexagonal) has not been resolved satisfactorily because of the crucial role played by kinetic factors in the formation of BN phases at high temperatures and pressures (experiments) and by competing bonding and electrostatic and many-body dispersion forces in BN cohesion (theory). This lack of understanding hampers the development of potential technological applications and challenges the boundaries of fundamental science. Read More

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http://dx.doi.org/10.1126/sciadv.aau5832DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6357755PMC
January 2019

Nitrogen regulator GlnR directly controls transcription of operon involved in methylcitrate cycle in .

J Bacteriol 2019 Feb 11. Epub 2019 Feb 11.

Lab of Biosystems and Microanalysis, Biomedical Nanotechnology Center, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China

utilizes fatty acids of the host as the carbon source. Metabolism of odd chain fatty acids by produces propionyl-CoA. Methylcitrate cycle is essential for Mycobacteria to utilize the propionyl-CoA to persist and grow on these fatty acids. Read More

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http://dx.doi.org/10.1128/JB.00099-19DOI Listing
February 2019

Single-Crystalline Nanosheets of Hybrid Perovskite Fabricated by a Vapor-Solution Sequential Deposition Route.

J Nanosci Nanotechnol 2019 Jun;19(6):3669-3672

National Research Center for Molecular Sciences, Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Organic-inorganic hybrid perovskite single crystals have attracted much attention due to their superior optoelectronic properties. Herein, we report a facile vapor-solution sequential route to prepare single-crystalline nanosheets of hybrid lead triiodide perovskite. It is found that this two-step deposition is able to fabricate sizeable high-quality single-crystalline nanosheets with no need of delicate control of crystallization conditions such as concentration or temperature for normal single crystal growth. Read More

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http://dx.doi.org/10.1166/jnn.2019.16107DOI Listing
June 2019
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Preparation of Ga₂O₃ Doped Sulfonated Tin Oxides as a Highly Active and Recyclable Heterogeneous Solid Acid Catalyst for Aldol Reactions.

J Nanosci Nanotechnol 2019 Jun;19(6):3658-3662

Beijing National Laboratory for Molecular Sciences, Laboratory of Molecular Nanostructures and Nanotechnology, Chinese Academy of Sciences Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

Ga₂O₃ doped sulfonated tin oxide catalysts were prepared via co-condensation method in ethanol solvent, followed by sulfonation and calcination. The samples were characterized by isothermal nitrogen adsorption/desorption, powder X-ray diffraction (XRD), thermal gravimetric analysis (TG), Raman spectra and DRIFT spectra. The number of acid sites on the catalysts was measured with the potentiometric titration of butyl amine. Read More

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http://dx.doi.org/10.1166/jnn.2019.16101DOI Listing
June 2019
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Evidence of Tetrahedrally Coordinated Nickel Cations in Nanostructured NiFe₂O₄.

J Nanosci Nanotechnol 2019 Jun;19(6):3654-3657

VŠB-Technical University of Ostrava, Institute of Physics, Faculty of Mining and Geology, 17. listopadu 15, 708 33 Ostrava, Czech Republic š.

Nanostructured nickel ferrite (NiFe₂O₄) is prepared via high-energy ball milling of the bulk counterpart at ambient temperature. The structure of the as-prepared nanoferrite is characterized by Raman spectroscopy and Fe Mössbauer spectroscopy. Due to the ability of these spectroscopic techniques to probe the local environment of ions, valuable complementary insight into the nature of the local structural disorder of nanosized NiFe₂O₄ is provided. Read More

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http://dx.doi.org/10.1166/jnn.2019.16492DOI Listing