83,112 results match your criteria Nanotechnology Science and Applications [Journal]


The Overview of Methods of Nanoparticle Exposure Assessment.

Methods Mol Biol 2019 ;1894:353-367

Key Laboratory of Occupational Safety and Health, Beijing Municipal Institute of Labour Protection, Beijing, People's Republic of China.

Nanotechnology is now widely used in industry as well as consumer products, such as electrical devices, cosmetics, medicine, and household appliances. In the life cycle of the nano-products, including production, use, and disposal, nanoparticles may be released to the environment. However, there is no current consensus on the best method for evaluating and characterizing nanoparticle exposure. Read More

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January 2019
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Advanced applications of nanotechnology in veterinary medicine.

Environ Sci Pollut Res Int 2018 Dec 13. Epub 2018 Dec 13.

Faculty of Veterinary Medicine, Department of Medicine and Infectious Diseases, Cairo University, Giza, Egypt.

The invention of new techniques to manipulate materials at their nanoscale had an evolutionary effect on various medical sciences. At the time, there are thousands of nanomaterials which can be divided according to their shape, origin, or their application. The nanotechnology provided new solutions for old problems. Read More

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December 2018
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A nanocrystalline monoclinic CaCO precursor of metastable aragonite.

Sci Adv 2018 Dec 12;4(12):eaau6178. Epub 2018 Dec 12.

Institute of Geology, University of Innsbruck, Innrain 52, Innsbruck 6020, Austria.

Despite its thermodynamical metastability at near-surface conditions, aragonite is widespread in marine and terrestrial sediments. It abundantly forms in living organisms, and its abiotic formation is favored in waters of a Mg/Ca ratio > 1.5. Read More

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December 2018

Nanoparticle Delivery of RIG-I Agonist Enables Effective and Safe Adjuvant Therapy in Pancreatic Cancer.

Mol Ther 2018 Nov 17. Epub 2018 Nov 17.

Division of Pharmacoengineering and Molecular Pharmaceutics, Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA; UNC & NCSU Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA. Electronic address:

Local immunomodulation can be a promising strategy to augment the efficacy and decrease off-target toxicities associated with cancer treatment. Pancreatic cancer is resistant to immunotherapies due to the immunosuppressive tumor microenvironment. Herein, we investigated a therapeutic approach involving delivery of a short interfering double-stranded RNA (dsRNA), specific to Bcl2, with 5' triphosphate ends, by lipid calcium phosphate nanoparticles, in an orthotopic allograft KPC model of pancreatic cancer. Read More

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November 2018
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Significant Carrier Extraction Enhancement at the Interface of an InN/p-GaN Heterojunction under Reverse Bias Voltage.

Nanomaterials (Basel) 2018 Dec 12;8(12). Epub 2018 Dec 12.

Institute of Photonics and Nanotechnology, Faculty of Physics, Vilnius University, Sauletekio 3, 10257 Vilnius, Lithuania.

In this paper, a superior-quality InN/p-GaN interface grown using pulsed metalorganic vapor-phase epitaxy (MOVPE) is demonstrated. The InN/p-GaN heterojunction interface based on high-quality InN (electron concentration 5.19 × 10 cm and mobility 980 cm²/(V s)) showed good rectifying behavior. Read More

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December 2018

Magnetic Nanoparticle-Based Biosensing Assay Quantitatively Enhances Acid-Fast Bacilli Count in Paucibacillary Pulmonary Tuberculosis.

Biosensors (Basel) 2018 Dec 12;8(4). Epub 2018 Dec 12.

Global Alliance for Rapid Diagnostics. Michigan State University, East Lansing, MI 48824, USA.

A new method using a magnetic nanoparticle-based colorimetric biosensing assay (NCBA) was compared with sputum smear microscopy (SSM) for the detection of pulmonary tuberculosis (PTB) in sputum samples. Studies were made to compare the NCBA against SSM using sputum samples collected from PTB patients prior to receiving treatment. Experiments were also conducted to determine the appropriate concentration of glycan-functionalized magnetic nanoparticles (GMNP) used in the NCBA and to evaluate the optimal digestion/decontamination solution to increase the extraction, concentration and detection of acid-fast bacilli (AFB). Read More

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December 2018

Blood-Brain Delivery Methods Using Nanotechnology.

Pharmaceutics 2018 Dec 11;10(4). Epub 2018 Dec 11.

Emergency University Hospital, Bucharest, Romania, "Carol Davila" University of Medicine and Pharmacy, 050474 Bucharest, Romania.

Pathologies of the brain, of which brain cancer, Alzheimer's disease, Parkinson's disease, stroke, and multiple sclerosis, are some of the most prevalent, and that presently are poorly treated due to the difficulties associated with drug development, administration, and targeting to the brain. The existence of the blood-brain barrier, a selective permeability system which acts as a local gateway against circulating foreign substances, represents the key challenge for the delivery of therapeutic agents to the brain. However, the development of nanotechnology-based approaches for brain delivery, such as nanoparticles, liposomes, dendrimers, micelles, and carbon nanotubes, might be the solution for improved brain therapies. Read More

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December 2018

Development of Pranoprofen Loaded Nanostructured Lipid Carriers to Improve Its Release and Therapeutic Efficacy in Skin Inflammatory Disorders.

Nanomaterials (Basel) 2018 Dec 7;8(12). Epub 2018 Dec 7.

Department of Chemical and Instrumental Analysis, Faculty of Chemistry and Pharmacy, University of El Salvador, Ciudad Universitaria, 3026 San Salvador, El Salvador.

Pranoprofen (PF)-loaded nanostructured lipid carriers (NLCs), prepared using a high-pressure homogenization method, have been optimized and characterized to improve the biopharmaceutical profile of the drug. The optimized PF-NLCs exhibited physicochemical characteristics and morphological properties that were suitable for dermal application. Stability assays revealed good physical stability, and the release behavior of PF from these NLCs showed a sustained release pattern. Read More

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December 2018

Development of Highly Sensitive Immunosensor for Clenbuterol Detection by Using Poly(3,4-ethylenedioxythiophene)/Graphene Oxide Modified Screen-Printed Carbon Electrode.

Sensors (Basel) 2018 Dec 7;18(12). Epub 2018 Dec 7.

Functional Devices Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia.

Clenbuterol (CLB) is an antibiotic and illegal growth promoter drug that has a long half-life and easily remains as residue and contaminates the animal-based food product that leads to various health problems. In this work, electrochemical immunosensor based on poly(3,4-ethylenedioxythiophene)/graphene oxide (PEDOT/GO) modified screen-printed carbon electrode (SPCE) for CLB detection was developed for antibiotic monitoring in a food product. The modification of SPCE with PEDOT/GO as a sensor platform was performed through electropolymerization, while the electrochemical assay was accomplished while using direct competitive format in which the free CLB and clenbuterol-horseradish peroxidase (CLB-HRP) in the solution will compete to form binding with the polyclonal anti-clenbuterol antibody (Ab) immobilized onto the modified electrode surface. Read More

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December 2018

The Power of Fish Models to Elucidate Skin Cancer Pathogenesis and Impact the Discovery of New Therapeutic Opportunities.

Int J Mol Sci 2018 Dec 7;19(12). Epub 2018 Dec 7.

Department of Chemistry, Chung Yuan Christian University, Chung-Li 32023, Taiwan.

Animal models play important roles in investigating the pathobiology of cancer, identifying relevant pathways, and developing novel therapeutic tools. Despite rapid progress in the understanding of disease mechanisms and technological advancement in drug discovery, negative trial outcomes are the most frequent incidences during a Phase III trial. Skin cancer is a potential life-threatening disease in humans and might be medically futile when tumors metastasize. Read More

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December 2018

Photoelectrocatalytic decolorization of azo dyes with nano-composite oxide layers of ZnO nanorods decorated with Ag nanoparticles.

Chemosphere 2018 Dec 3;219:296-304. Epub 2018 Dec 3.

Universidad Nacional De Ingeniería, Lima, Peru.

Photoelectrocatalysis provides an excellent frame for the application of photocatalytic nanostructured materials on easy recoverable supports. This study reports the two-step synthesis of hierarchically nanostructured ZnO/Ag composite photoelectrodes. Wurtzite ZnO was selectively electronucleated as spheroidal seeds on fluor doped tin oxide substrates and nanodecorated with Ag nanoclusters under electrochemical control. Read More

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December 2018

Cholinergic Receptor Nicotinic Alpha 5 (CHRNA5) RNAi is associated with cell cycle inhibition, apoptosis, DNA damage response and drug sensitivity in breast cancer.

PLoS One 2018 13;13(12):e0208982. Epub 2018 Dec 13.

Department of Molecular Biology and Genetics, Faculty of Science, Bilkent University, Ankara, Turkey.

Cholinergic Receptor Nicotinic Alpha 5 (CHRNA5) is an important susceptibility locus for nicotine addiction and lung cancer. Depletion of CHRNA5 has been associated with reduced cell viability, increased apoptosis and alterations in cellular motility in different cancers yet not in breast cancer. Herein we first showed the expression of CHRNA5 was variable and positively correlated with the fraction of total genomic alterations in breast cancer cell lines and tumors indicating its potential role in DNA damage response (DDR). Read More

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December 2018

[Tc-HYNIC-N-dodecylamide]: a new hydrophobic tracer for labelling reconstituted high-density lipoproteins (rHDL) for radioimaging.

Nanoscale 2018 Dec 13. Epub 2018 Dec 13.

Dept. of Physiology and Anatomy, University of North Texas Health Science Center, Fort Worth, TX 76107, USA.

Despite the widespread use of nanotechnology in radio-imaging applications, lipoprotein based delivery systems have received only limited attention so far. These studies involve the synthesis of a novel hydrophobic radio-imaging tracer consisting of a hydrazinonicotinic acid (HYNIC)-N-dodecylamide and 99mTc conjugate that can be encapsulated into rHDL nanoparticles (NPs). These rHDL NPs can selectively target the Scavenger Receptor type B1 (SR-B1) that is overexpressed on most cancer cells due to excess demand for cholesterol for membrane biogenesis and thus can target tumors in vivo. Read More

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December 2018

A self-assembly study of PNA-porphyrin and PNA-BODIPY hybrids in mixed solvent systems.

Nanoscale 2018 Dec 13. Epub 2018 Dec 13.

Department of Chemistry, University of Crete, Laboratory of Bioinorganic Chemistry, Voutes Campus, 70013 Heraklion, Crete, Greece.

In this work a peptide nucleic acid (PNA) was covalently connected with two different chromophores, namely porphyrin and boron-dipyrromethene. To the best of our knowledge, this is the first example in the literature where a PNA unit is covalently linked to such chromophores. The self-assembly properties of the hybrids were examined through electron microscopy experiments by adopting the "good-bad" solvent self-assembly protocol. Read More

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December 2018

PVP intercalated metallic WSe as NIR photothermal agents for efficient tumor ablation.

Nanotechnology 2018 Dec 13;30(6):065102. Epub 2018 Dec 13.

National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, People's Republic of China.

Transition metal dichalogenides (TMDCs) with unique layered structures hold promising potential as transducers for photothermal therapy. However, the low photothermal conversion efficiency and poor stability in some cases limit their practical applications. Herein, we demonstrate the fabrication of ultrathin homogeneous hybridized TMDC nanosheets and their use for highly efficient photothermal tumor ablation. Read More

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December 2018

Exploring an interesting dual functionality of anacardic acid for efficient paclitaxel delivery in breast cancer therapy.

Nanomedicine (Lond) 2018 Dec 13. Epub 2018 Dec 13.

Department of Pharmaceutics, Centre for Pharmaceutical Nanotechnology, National Institute of Pharmaceutical Education & Research (NIPER), Sector 67, S.A.S. Nagar (Mohali), Punjab 160062, India.

Aim: To explore the potential of paclitaxel (PTX)-loaded anacardic acid conjugated hydrophobized gelatin nanoparticles.

Materials & Methods: Nanoparticles prepared by nanoprecipitation technique were evaluated for various quality attributes (particle size, % entrapment efficiency) in vitro drug release, MCF-7 cell uptake, cell cytotoxicity, in vivo pharmacokinetics, antitumor efficacy and toxicity.

Results: The nanoparticles (250-300 nm, 74% entrapment efficiency) showed approximately 2. Read More

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December 2018

Enhanced combination cancer therapy using lipid-calcium carbonate/phosphate nanoparticles as a targeted delivery platform.

Nanomedicine (Lond) 2018 Dec 13. Epub 2018 Dec 13.

Australian Institute for Bioengineering & Nanotechnology, The University of Queensland, St Lucia, QLD 4072, Australia.

Aim: Melanoma, the most life-threatening skin cancer, requires more effective therapies.

Methodology: A new folic acid (FA) receptor-targeted lipid-coated calcium carbonate/phosphate (LCCP) nanoparticle was synthesized, incorporating two often-used therapeutics, cell death siRNA and α-tocopheryl succinate.

Results: The nanoparticles were spherical, with an average size of 40 nm. Read More

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December 2018

Targeting Inflammation With Nanosized Drug Delivery Platforms in Cardiovascular Diseases: Immune Cell Modulation in Atherosclerosis.

Front Bioeng Biotechnol 2018 27;6:177. Epub 2018 Nov 27.

NEST Laboratory, Scuola Normale Superiore, Pisa, Italy.

Atherosclerosis (AS) is a disorder of large and medium-sized arteries; it consists in the formation of lipid-rich plaques in the intima and inner media, whose pathophysiology is mostly driven by inflammation. Currently available interventions and therapies for treating atherosclerosis are not always completely effective; side effects associated with treatments, mainly caused by immunodepression for anti-inflammatory molecules, limit the systemic administration of these and other drugs. Given the high degree of freedom in the design of nanoconstructs, in the last decades researchers have put high effort in the development of nanoparticles (NPs) formulations specifically designed for either drug delivery, visualization of atherosclerotic plaques, or possibly the combination of both these and other functionalities. Read More

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November 2018

Enzyme-free synthesis of cyclic single-stranded DNA constructs containing a single triazole, amide or phosphoramidate backbone linkage and their use as templates for rolling circle amplification and nanoflower formation.

Chem Sci 2018 Nov 24;9(42):8110-8120. Epub 2018 Aug 24.

Chemistry Research Laboratory , University of Oxford , Oxford , OX1 3TA , UK . Email:

Cyclic oligonucleotides are valuable targets with a broad range of potential applications spanning molecular biology and nanotechnology. Of particular importance is their role as templates in the rolling circle amplification (RCA) reaction. We describe three different chemical cyclisation methods for the preparation of single-stranded cyclic DNA constructs. Read More

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November 2018

Unravelling the origins of ice nucleation on organic crystals.

Chem Sci 2018 Nov 27;9(42):8077-8088. Epub 2018 Aug 27.

Thomas Young Centre , London Centre for Nanotechnology and Department of Physics and Astronomy , University College London , London WC1E 6BT , UK.

Organic molecules such as steroids or amino acids form crystals that can facilitate the formation of ice - arguably the most important phase transition on earth. However, the origin of the ice nucleating ability of organic crystals is still largely unknown. Here, we combine experiments and simulations to unravel the microscopic details of ice formation on cholesterol, a prototypical organic crystal widely used in cryopreservation. Read More

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November 2018

Role of Endocrine-Disrupting Engineered Nanomaterials in the Pathogenesis of Type 2 Diabetes Mellitus.

Front Endocrinol (Lausanne) 2018 26;9:704. Epub 2018 Nov 26.

TERI Deakin Nanobiotechnology Centre, The Energy and Resources Institute, New Delhi, India.

Nanotechnology has enabled the development of innovative technologies and products for several industrial sectors. Their unique physicochemical and size-dependent properties make the engineered nanomaterials (ENMs) superior for devising solutions for various research and development sectors, which are otherwise unachievable by their bulk forms. However, the remarkable advantages mediated by ENMs and their applications have also raised concerns regarding their possible toxicological impacts on human health. Read More

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November 2018

Electric-field induced structural transition in vertical MoTe- and MoWTe-based resistive memories.

Nat Mater 2019 Jan 10;18(1):55-61. Epub 2018 Dec 10.

Birck Nanotechnology Center, Purdue University, West Lafayette, IN, USA.

Transition metal dichalcogenides have attracted attention as potential building blocks for various electronic applications due to their atomically thin nature and polymorphism. Here, we report an electric-field-induced structural transition from a 2H semiconducting to a distorted transient structure (2H) and orthorhombic T conducting phase in vertical 2H-MoTe- and MoWTe-based resistive random access memory (RRAM) devices. RRAM programming voltages are tunable by the transition metal dichalcogenide thickness and show a distinctive trend of requiring lower electric fields for MoWTe alloys versus MoTe compounds. Read More

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January 2019

MicroRNA amplification and detection technologies: opportunities and challenges for point of care diagnostics.

Lab Invest 2018 Dec 12. Epub 2018 Dec 12.

Laboratory of Applied Micro and Nanotechnology (LAMINATE), Division of Microbiology and Production, National Food Institute, Technical University of Denmark, 2800 Kgs, Lyngby, Denmark.

The volume of point of care (POC) testing continues to grow steadily due to the increased availability of easy-to-use devices, thus making it possible to deliver less costly care closer to the patient site in a shorter time relative to the central laboratory services. A novel class of molecules called microRNAs have recently gained attention in healthcare management for their potential as biomarkers for human diseases. The increasing interest of miRNAs in clinical practice has led to an unmet need for assays that can rapidly and accurately measure miRNAs at the POC. Read More

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December 2018

CoP Nanoparticles Wrapped in Amorphous Porous Carbon as an Efficient and Stable Catalyst for Water Oxidation.

Front Chem 2018 22;6:580. Epub 2018 Nov 22.

Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Hubei Nuclear Solid Physics Key Laboratory, Wuhan University, Wuhan, China.

Exploring highly active, enduringly stable, and low-cost oxygen evolution reaction catalysts continues to be a dominant challenge to commercialize renewable electrochemical water-splitting technology. High-active and earth-abundant cobalt phosphides are recently considered as promising candidates. However, the poor inherent electron transfer efficiency and instability hinder its further development. Read More

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November 2018

Anticancer Activity and Cisplatin Binding Ability of -Quinoline and -Isoquinoline Derived [PdL] Metallosupramolecular Cages.

Front Chem 2018 22;6:563. Epub 2018 Nov 22.

Department of Chemistry, University of Otago, Dunedin, New Zealand.

New quinoline () and isoquinoline-based () ligands have been synthesized, along with their respective homoleptic [Pd( or )] cages ( and ). The ligands and cages were characterized by H, C and diffusion ordered (DOSY) NMR spectroscopies, high resolution electrospray ionization mass spectrometry (HR-ESIMS) and in the case of the -quinoline cage, X-ray crystallography. The crystal structure of the architecture showed that the [Pd()] cage formed a twisted isomer where the [Pd()] units at either end of the cage architecture adopt the opposite twists (left and right handed). Read More

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November 2018

Aberrant Metabolism in Hepatocellular Carcinoma Provides Diagnostic and Therapeutic Opportunities.

Oxid Med Cell Longev 2018 4;2018:7512159. Epub 2018 Nov 4.

Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy.

Hepatocellular carcinoma (HCC) accounts for over 80% of liver cancer cases and is highly malignant, recurrent, drug-resistant, and often diagnosed in the advanced stage. It is clear that early diagnosis and a better understanding of molecular mechanisms contributing to HCC progression is clinically urgent. Metabolic alterations clearly characterize HCC tumors. Read More

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November 2018

Resveratrol Brain Delivery for Neurological Disorders Prevention and Treatment.

Front Pharmacol 2018 20;9:1261. Epub 2018 Nov 20.

LEPABE, Department of Chemical Engineering, Faculty of Engineering of the University of Porto, Porto, Portugal.

Resveratrol (RES) is a natural polyphenolic non-flavonoid compound present in grapes, mulberries, peanuts, rhubarb and in several other plants. Numerous health effects have been related with its intake, such as anti-carcinogenic, anti-inflammatory and brain protective effects. The neuroprotective effects of RES in neurological diseases, such as Alzheimer's (AD) and Parkinson's (PD) diseases, are related to the protection of neurons against oxidative damage and toxicity, and to the prevention of apoptotic neuronal death. Read More

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November 2018

GaP Nanowire Betavoltaic Device.

Nanotechnology 2018 Nov 22. Epub 2018 Nov 22.

Department of Engineering Physics, McMaster University, Office: JHE A324 , 1280 Main Street West, John Hodgins Engineering Building, Room A315, Hamilton, Ontario, L8S 4L7 CANADA, Hamilton, Ontario, L8S4L7, CANADA.

A betavoltaic device is reported that directly converts beta energy from a 63Ni radioisotope into electrical energy by impact ionization in a GaP nanowire array. The GaP nanowires are grown in a periodic array by molecular beam epitaxy on silicon using the self-assisted vapor-liquid-solid method. By growing GaP nanowires with large packing fraction and length on the order of the maximum beta range, the nanowires can efficiently capture the betas with high energy conversion efficiency while using inexpensive Si substrates. Read More

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November 2018

Phonon thermal conduction in a graphene-C3N heterobilayer using molecular dynamics simulations.

Nanotechnology 2018 Nov 28. Epub 2018 Nov 28.

Institute of Thermal Science and Technology, Shandong University, Jinan, Shandong, CHINA.

Two-dimensional (2D) graphene (GRA) and polyaniline (C<sub>3</sub>N) monolayers are attracting the growing research interest due to its excellent electrical and thermal properties. In this work, in-plane and out-of-plane phonon thermal conduction of GRA-C<sub>3</sub>N heterobilayer are systematically investigated using classical molecular dynamics simulations. Effects of system size, temperature and interlayer coupling strength on the in-plane thermal conductivity (<i>k</i>) and out-of-plane interfacial thermal resistance (<i>R</i>) are evaluated. Read More

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November 2018

Facet-selective group-III incorporation in InGaAs Template Assisted Selective Epitaxy.

Nanotechnology 2018 Nov 30. Epub 2018 Nov 30.

Science and Technology, IBM Zurich Research Laboratories, Rüschlikon, SWITZERLAND.

InGaAs is a potential candidate for Si replacement in upcoming advanced technological nodes because of its excellent electron transport properties and relatively low interface defect density in dielectric gate stacks. Therefore, integrating InGaAs devices with the established Si platforms is highly important. Using template-assisted selective epitaxy (TASE), InGaAs nanowires can be monolithically integrated with high crystal quality, although the mechanisms of group III incorporation in this ternary material have not been thoroughly investigated. Read More

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November 2018

Tuning the electronic structure of single-walled carbon nanotube by high-pressure H exposure.

Nanotechnology 2018 Dec 7;30(6):065201. Epub 2018 Dec 7.

Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea.

We report on an electronic structure change of single-walled carbon nanotube (SWNT) on hexagonal boron nitride due to electron doping via high-pressure H exposure. The fractional coverage of hydrogenated carbon atom is estimated to be at least θ = 0.163 from the in situ I -V measurements of the release process. Read More

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December 2018

Tunable dual emission in Mn2+-doped CsPbX3 (X=Cl, Br) quantum dots for high efficiency white light-emitting diodes.

Nanotechnology 2018 Nov 21. Epub 2018 Nov 21.

State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China, Shanghai, CHINA.

Doping of Mn2+ into semiconductor nanocrystals has been demonstrated to endow them with novel electronic, optical and magnetic functionalities. In this paper, the Mn doped CsPbX3 (X=Br, Cl) quantum dots (QDs) were synthesized at room temperature via a facile strategy by introducing dimethyl sulfoxide (DMSO)-MnBr2/PbX2 composite as precursor. The excitonic emission spectra of the as-obtained Mn doped CsPbX3 QDs can be tuned from 517 nm to 418 nm by adjusting the ratio of PbBr2/PbCl2 precisely, and the luminescence mechanism of the doped QDs is discussed detailedly. Read More

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November 2018

Enhanced light extraction from organic light-emitting diodes using a quasi-periodic nano-structure.

Nanotechnology 2018 Nov 30. Epub 2018 Nov 30.

Department of Electrical Engineering, Korea University, #204, 5-1 Anam-Dong, Seongbuk-Gu, Seoul 136-713, KOREA, Seoul, KOREA, REPUBLIC OF.

Organic light-emitting diodes (OLEDs) with a quasi-periodic nano-structure (QPS) were fabricated via a combination of laser interference lithography (LIL) and reactive ion etching (RIE). The LIL process was used to generate a periodic pattern, whereas the RIE process was used as a supplement to add randomness to the periodic pattern. The period of the fabricated periodic pattern was determined by finite difference time domain (FDTD) solutions. Read More

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November 2018

Radioluminescence in biomedicine: physics, applications, and models.

Phys Med Biol 2018 Nov 29. Epub 2018 Nov 29.

Radiation Oncology, Stanford University, 300 Pasteur Dr, MC 5132, Grant S277, Stanford, California, 94305, UNITED STATES.

The electromagnetic spectrum contains different frequency bands useful for medical imaging and therapy. Short wavelengths (ionizing radiation) are commonly used for radiological and radionuclide imaging and for cancer radiation therapy. Intermediate wavelengths (optical radiation) are useful for more localized imaging and for photodynamic therapy. Read More

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November 2018

CdSe tetrapod interfacial layer for improving electron extraction in planar heterojunction perovskite solar cells.

Nanotechnology 2019 Feb;30(6):065401

Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea.

We demonstrate the improvement in the efficiency of planar heterojunction perovskite solar cells by employing cadmium selenide tetrapods (CdSe TPs) as an electron extraction layer. The insertion of the CdSe TP layer between the titanium oxide (TiO) and perovskite film facilitates electron transfer at the TiO/perovskite interface, as indicated by the significantly quenched steady-state photoluminescence of the perovskite film. Furthermore, we observed a conductivity enhancement of the perovskite film by introducing the CdSe TP layer. Read More

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February 2019

Enrichment of semiconducting single-walled carbon nanotubes by simple equipment and solar radiation.

Nanotechnology 2019 Feb;30(6):06LT01

CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, People's Republic of China. University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.

High-purity semiconducting (s-) single-walled carbon nanotubes (SWCNTs) have great potential to replace silicon-based materials for microelectronic devices. However, the enrichment methods of s-SWCNTs usually required complex devices and non-renewable energy. In this study, instead of a traditional heating method, renewable solar was employed to dramatically increase the heating rate and improve the reaction to be simple and more controllable, thereby water was successfully used to selectively etch metallic (m-) SWCNTs. Read More

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February 2019

Growth of germanium nanowires with isobuthyl germane.

Nanotechnology 2018 Dec 4. Epub 2018 Dec 4.

Consiglio Nazionale delle Ricerche, Parco Area delle Scienze 37/A, I-43124 Parma, Parma, 43124, ITALY.

We demonstrate the feasibility of the use of isobutyl germane, a novel germanium source, for the vapor-liquid-solid growth of germanium nanowires on Si (111) substrates, using a thin gold layer as catalyst. The density and the diameter of the nanowires were controlled by varying the Au layer thickness and the isobutyl germane flow. The nanowires show perfect crystallinity and lengths from several hundreds of nm to 3-4 m. Read More

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December 2018

Enhanced interaction in TiO2/BiVO4 heterostructures via MXene Ti3C2 derived 2D-Carbon for highly efficient visible-light photocatalysis.

Nanotechnology 2018 Nov 22. Epub 2018 Nov 22.

College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, CHINA.

Heterostructured photocatalysts play a significant role in contaminants removal by decreasing the recombination of the photo-induced charges. Herein, we presented novel TiO2/C/BiVO4 ternary hybrids employing a two-dimensional (2D) layered Ti3C2 MXene precursor, overcoming lattice mismatching of TiO2/BiVO4 binary heterostructures simultaneously. Raman and XPS analyses proved the strongly coupling effects of TiO2, carbon and BiVO4 components, and the heterostructures were identified by HRTEM results. Read More

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November 2018

Volume holographic recording in Al nanoparticles dispersed phenanthrenequinone-doped poly(methyl methacrylate) photopolymer.

Nanotechnology 2018 Nov 13. Epub 2018 Nov 13.

Institute of Industrial Science, The University of Tokyo, Tokyo, JAPAN.

High-performance material plays a crucial role on holographic data storage which is a potential technology in area of high capacity data storage. We report a new kind of holographic storage material that is aluminum nanoparticles (Al NPs) dispersed phenanthrenequinone-doped poly(methyl methacrylate) (PQ/PMMA) material. Al NPs are synthesized in monomer solvent immediately and efficiently by method of laser ablation in liquids without chemical precursors. Read More

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November 2018

Microbial synthesis of Pd-Pt alloy nanoparticles using Shewanella oneidensis MR-1 with enhanced catalytic activity for nitrophenol and azo dyes reduction.

Nanotechnology 2019 Feb;30(6):065607

School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, People's Republic of China. State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangzhou 510070, People's Republic of China.

Bimetallic nanoparticles (NPs) often exhibit improved catalytic performance due to the electronic and spatial structure changes. Herein, a novel green biosynthesis method for Pd-Pt alloy NPs using Shewanella oneidensis MR-1 was proposed. The morphology, size and crystal structure of Pd-Pt alloy NPs were studied by a suite of characterization techniques. Read More

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February 2019

Extraction of p-n junction properties and series resistance in GaAs nanowire based solar cells using light concentration.

Nanotechnology 2018 Dec 5. Epub 2018 Dec 5.

Ecole Polytechnique Federale de Lausanne, Institut des Materiaux, BM 2138 (Batiment BM), Station 17, CH-1015 Lausanne, Lausanne, SWITZERLAND.

Series resistance in solar cells limit their maximum conversion efficiency and thus should be minimized. Generally, such losses originate from deficiencies at the contact or absorber level. Quantifying them is the first step for tacking its reduction. Read More

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December 2018

Ga-SBA-3 A novel nanostructured material: synthesis, characterization and application.

Nanotechnology 2019 Feb;30(6):065703

Centro de Investigación en Nanociencia y Nanotecnología (NANOTEC), Facultad Regional Córdoba, Universidad Tecnológica Nacional, Maestro López y Cruz Roja Argentina, 5016, Córdoba, Argentina.

This paper reports for the first time the incorporation of gallium into the structure of the mesoporous SBA-3 material in order to modify the intrinsic acidity of the material. The study indicates the effective incorporation of Ga into a network in tetrahedral form, with most in the interior of the lodging and a low proportion on the external surface. Gallium was introduced via post-synthesis using Ga-nitrate in appropriate conditions. Read More

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February 2019

SnO2-rGO nanocomposite as an efficient electron transport layer for stable perovskite solar cells on AZO substrate.

Nanotechnology 2018 Nov 21. Epub 2018 Nov 21.

Peking University Shenzhen Graduate School, Shenzhen, Guangdong, CHINA.

Electron transport layer (ETL) plays an important role in realizing efficient and stable perovskite solar cells. There are continuous efforts in developing new types of low cost ETLs with improved conductivity and compatibility with perovskite and the conducting electrode. Here, in order to obtain high efficient and stable perovskite solar cells on ZnO: Al (AZO) substrate, reduced graphene oxide (rGO) is incorporated into SnO2 nanoparticles to form composite ETL. Read More

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November 2018

MEH-PPV photophysics: insights from the influence of a nearby 2D quencher.

Nanotechnology 2019 Feb;30(6):065702

Dept of Electrical Engineering, Yuan Ze University, Chung-Li, Taoyuan City, Taiwan.

The effect of 2D quenching on single chain photophysics was investigated by spin coating 13 nm thick films of polystyrene lightly doped with MEH-PPV onto CVD grown graphene and observing the changes in several photoluminescent (PL) observables. With 99% of the PL quenched, we found a 60% drop in the PL lifetime, along with a significant blue-shift of the PL emission due to the preferential quenching of emission at longer wavelengths. During photo-bleaching, the blue spectral shift observed for isolated polymers was eliminated in the presence of the quencher up until 70% of the polymer was photo-bleached. Read More

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February 2019

Graphene and graphene nanomesh supported nickel clusters: Electronic, magnetic, and hydrogen storage properties.

Nanotechnology 2018 Nov 5. Epub 2018 Nov 5.

Department of Biophysics, Institute for Research and Medical Consultations, Imam Abdulrahman Bin Faisal University, Dammam, SAUDI ARABIA.

Small-sized nanoparticles are widely used in applications, such as catalysis, nanoelectronics, and hydrogen storage. However, the small size causes a common problem: agglomeration on the support template. One solution is to use templates that limit the mobility of the nanoparticles. Read More

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November 2018

Probing static discharge of polymer surfaces with nanoscale resolution.

Nanotechnology 2018 Nov 1. Epub 2018 Nov 1.

Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, UNITED STATES.

Triboelectric charging strongly affects the operation cycle and handling of materials and can be used to harvest mechanical energy through triboelectric nanogenerator set-up. Despite ubiquity of triboelectric effects, a lot of mechanisms surrounding the relevant phenomena remain to be understood. Continued progress will rely on the development of rapid and reliable methods to probe accumulation and dynamics of static charges. Read More

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November 2018

Tuning the electronic structure of single-walled carbon nanotube by high-pressure H2 exposure.

Nanotechnology 2018 Nov 15. Epub 2018 Nov 15.

Department of Physics, Seoul National University, Seoul 151-747, KOREA, Seoul, KOREA, REPUBLIC OF.

We report on an electronic structure change of single-walled carbon nanotube (SWNT) on hexagonal boron nitride (h-BN) due to electron doping via high-pressure H<sub>2</sub> exposure. The fractional coverage of hydrogenated carbon atom is estimated to be at least <i>θ</i> = 0.163 from the in situ <i>I</i><sub>ds</sub>-<i>V</i><sub>g</sub> measurements of the release process. Read More

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November 2018

Efficient metallic nanowire welding using the Eddy current method.

Nanotechnology 2019 Feb;30(6):065708

School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea.

In this study, metallic nanowires (M-NWs) such as silver nanowires (AgNWs) and copper nanowires (CuNWs) were welded only at junctions resistively by a novel method using an indirect Eddy current through an inductive power transfer. By applying an inductive power of 45 kHz alternating current power indirectly for 6 s to the M-NW network deposited on polymer substrates, a decrease of sheet resistance up to ∼67.9% for AgNWs and ∼49. Read More

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February 2019

High Temperature, Transparent, Superhydrophobic Teflon AF-2400/Indium Tin Oxide Nanocomposite Thin Films.

Nanotechnology 2018 Nov 20. Epub 2018 Nov 20.

Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, 2801 S University, Little Rock, AR 72204-1099, USA, Little Rock, 72204, UNITED STATES.

The outstanding properties of Teflon AF-2400-chemical, optical, etc.-inspired us to make modifications to enhance its hydrophobicity. The AF-2400/Indium Tin Oxide Nanoparticles Nanocomposite was prepared by a spin coating technique at room temperature, using the AF-2400 polymer as the matrix and indium tin oxide (ITO) nanoparticles as the filler. Read More

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November 2018