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Multifunctional magnetic and fluorescent core–shell nanoparticles for bioimaging

Yanjiao Lu、Bicheng He、Jie Shen 等 6 位作者2014-11-28Nanoscale

Novel magnetic and fluorescent core-shell nanoparticles have been fabricated, which exhibit superparamagnetic behavior and emit strong near-infrared fluorescence. The nanoparticles are highly biocompatible and can be internalized into cells with nucleic accumulation via strong interaction with nucleic acids, implying…

Nanoparticle-Based Drug DeliveryQuantum Dots Synthesis And PropertiesPolymer Surface Interaction Studies

First-Principles Characterization of the Critical Thickness for Forming Metallic States in Strained LaAlO3/SrTiO3(001) Heterostructure

Safdar Nazir、Kesong Yang2014-11-28ACS Applied Materials & Interfaces

The emerging two-dimensional electron gas (2DEG) at the interface between polar LaAlO3 (LAO) and nonpolar SrTiO3 (STO) provides potential applications in low-dimensional nanoelectronic devices because of its exceptional electron transport property. To form 2DEG in the LAO/STO heterostructure (HS), a minimum thickness…

Semiconductor materials and devicesElectronic and Structural Properties of OxidesFerroelectric and Negative Capacitance Devices

MAP_CHANNELS: a computation tool to aid in the visualization and characterization of solvent channels in macromolecular crystals

D.H. Juers、Jon Ruffin2014-11-28Journal of Applied Crystallography

A computation tool is described that facilitates visualization and characterization of solvent channels or pores within macromolecular crystals. A scalar field mapping the shortest distance to protein surfaces is calculated on a grid covering the unit cell and is written as a map file. The map provides a multiscale re…

Protein Structure and DynamicsProtein purification and stabilityEnzyme Structure and Function

Effect of nanocrystalline cellulose on morphological, thermal, and mechanical properties of Nylon 6 composites

Hajar Yousefian、Denis Rodrigue2014-11-28Polymer Composites

In this study, nanocomposites based on Nylon 6 and nanocrystalline cellulose (NCC) were prepared by melt compounding. Then, morphological, thermal, and mechanical properties were analyzed for NCC content between 0 and 7 wt%. Morphological analyses showed different roughness in fractured surface of neat Nylon and its n…

Natural Fiber Reinforced CompositesAdvanced Cellulose Research Studiesbiodegradable polymer synthesis and properties

A binary A x B 1−x ionic alkaline pseudocapacitor system involving manganese, iron, cobalt, and nickel: formation of electroactive colloids via in situ electric field assisted coprecipitation

Kunfeng Chen、Shu Yin、Dongfeng Xue2014-11-28Nanoscale

A new "combinatorial transition-metal cation pseudocapacitor" was demonstrated by designing combinatorial transition-metal cation pseudocapacitors with binary AxB1-x salt electrodes involving manganese, iron, cobalt, and nickel cations in an alkaline aqueous electrolyte. Binary multi-valence cations were crystallized…

Supercapacitor Materials and FabricationConducting polymers and applicationsAdvanced battery technologies research

β-Cyclodextrin coated SiO 2 @Au@Ag core–shell nanoparticles for SERS detection of PCBs

Yilin Lu、Guohua Yao、Kexi Sun 等 4 位作者2014-11-28Physical Chemistry Chemical Physics

A new type of surface-enhanced Raman scattering (SERS) substrate consisting of β-cyclodextrin (β-CD) coated SiO2@Au@Ag nanoparticles (SiO2@Au@Ag@CD NPs) has been achieved. Our protocol was a simplified approach as the fabrication and modification of the silver shell were realized in a single-step reaction by taking ad…

Gold and Silver Nanoparticles Synthesis and ApplicationsAdvanced biosensing and bioanalysis techniquesBiosensors and Analytical Detection

Triticale crop residue: a cheap material for high performance nanofibrillated cellulose

Sami Boufi、Alessandro Gandini2014-11-28RSC Advances

Nanofibrillated cellulose from triticale straws were produced using high-pressure homogenization and conventional high-speed blender for the disintegration process. The energy demand for the disintegration process was shown to depend on delignification and pretreatment.

Biofuel production and bioconversionAdvanced Cellulose Research StudiesLignin and Wood Chemistry

Silicon dioxide nanoparticles increase macrophage atherogenicity: Stimulation of cellular cytotoxicity, oxidative stress, and triglycerides accumulation

Lauren Petrick、Mira Rosenblat、Nicole Paland 等 4 位作者2014-11-28Environmental Toxicology

Nanoparticle research has focused on their toxicity in general, while increasing evidence points to additional specific adverse effects on atherosclerosis development. Arterial macrophage cholesterol and triglyceride (TG) accumulation and foam cell formation are the hallmark of early atherogenesis, leading to cardiova…

Nanoparticles: synthesis and applicationsAir Quality and Health ImpactsAntioxidant Activity and Oxidative Stress

Tuning the reorganization energy of electron transfer in supramolecular ensembles – metalloporphyrin, oligophenylenevinylenes, and fullerene – and the impact on electron transfer kinetics

Christina Stangel、Christina Schubert、Susanne Kuhri 等 11 位作者2014-11-28Nanoscale

Oligo(p-phenylenevinylene) (oPPV) wires of various lengths featuring pyridyls at one terminal and C60 moieties at the other, have been used as molecular building blocks in combination with porphyrins to construct a novel class of electron donor-acceptor architectures. These architectures, which are based on non-covale…

Porphyrin and Phthalocyanine ChemistryFullerene Chemistry and ApplicationsPhotochemistry and Electron Transfer Studies

Preparation of multi-coloured different sized fluorescent gold clusters from blue to NIR, structural analysis of the blue emitting Au 7 cluster, and cell-imaging by the NIR gold cluster

Subhasish Roy、Abhishek Baral、Rameswar Bhattacharjee 等 7 位作者2014-11-28Nanoscale

Blue, green, orange-red, red and NIR emitting gold quantum clusters have been prepared in aqueous media by using a bioactive peptide glutathione (reduced) at physiological pH. Matrix-assisted laser desorption ionization-time-of-flight mass spectrometry (MALDI-TOF MS) analyses show that the core structure sizes of the…

Quantum Dots Synthesis And PropertiesNanocluster Synthesis and ApplicationsAdvanced Nanomaterials in Catalysis

Conjugated Polymer Dots-on-Electrospun Fibers as a Fluorescent Nanofibrous Sensor for Nerve Gas Stimulant

Seonyoung Jo、Jong‐Ho Kim、Jaeguk Noh 等 8 位作者2014-11-28ACS Applied Materials & Interfaces

A novel chemical warfare agent sensor based on conjugated polymer dots (CPdots) immobilized on the surface of poly(vinyl alcohol) (PVA)-silica nanofibers was prepared with a dots-on-fibers (DoF) hybrid nanostructure via simple electrospinning and subsequent immobilization processes. We synthesized a polyquinoxaline (P…

Electrochemical sensors and biosensorsConducting polymers and applicationsLuminescence and Fluorescent Materials

Remarkable improvement in microwave absorption by cloaking a micro-scaled tetrapod hollow with helical carbon nanofibers

Xian Jian、Xiangnan Chen、Zuowan Zhou 等 11 位作者2014-11-28Physical Chemistry Chemical Physics

Helical nanofibers are prepared through in situ growth on the surface of a tetrapod-shaped ZnO whisker (T-ZnO), by employing a precursor decomposition method then adding substrate. After heat treatment at 900 °C under argon, this new composite material, named helical nanofiber-T-ZnO, undergoes a significant change in…

Metamaterials and Metasurfaces ApplicationsElectromagnetic wave absorption materialsAdvanced Antenna and Metasurface Technologies

Graphene-GaN Schottky diodes

Seongjun Kim、Tae Hoon Seo、Myung Jong Kim 等 6 位作者2014-11-28Nano Research

The electrical characteristics of graphene Schottky contacts formed on undoped GaN semiconductors were investigated. Excellent rectifying behavior with a rectification ratio of ∼10 7 at ±2 V and a low reverse leakage current of 1.0 × 10 −8 A/cm 2 at −5 V were observed. The Schottky barrier heights, as determined by th…

Graphene research and applicationsGaN-based semiconductor devices and materialsSemiconductor materials and interfaces

Doping of single-walled carbon nanotubes controlled via chemical transformation of encapsulated nickelocene

Marianna V. Kharlamova、Markus Sauer、Takeshi Saito 等 7 位作者2014-11-28Nanoscale

Controlled doping of carbon nanotubes is elemental for their electronic applications. Here we report an approach to tune the polarity and degree of doping of single-walled carbon nanotubes via filling with nickelocene followed by encapsulated reactions. Using Raman, photoemission spectroscopy and transmission electron…

Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications

Mechanical, thermal, and morphological properties of graphene reinforced polycarbonate/acrylonitrile butadiene styrene nanocomposites

Raheleh Heidar Pour、Azman Hassan、Mohammad Soheilmoghaddam 等 4 位作者2014-11-28Polymer Composites

Nanocomposites of polycarbonate/acrylonitrile butadiene styrene (PC/ABS) with (70/30) composition containing different amounts of graphene nanoplates (GNPs) (1, 3, and 5 wt%) were prepared by melt‐blending in a twin‐screw extruder. The structural, morphological, mechanical, and thermal properties of the nanocomposites…

Graphene research and applicationsPolymer Nanocomposites and PropertiesPolymer Nanocomposite Synthesis and Irradiation

The rheology of three-phase suspensions at low bubble capillary number

J. Truby、S. P. Mueller、Edward W. Llewellin 等 4 位作者2014-11-28Proceedings of the Royal Society A Mathematical Physical and Engineering Sciences

We develop a model for the rheology of a three-phase suspension of bubbles and particles in a Newtonian liquid undergoing steady flow. We adopt an 'effective-medium' approach in which the bubbly liquid is treated as a continuous medium which suspends the particles. The resulting three-phase model combines separate two…

Enhanced Oil Recovery TechniquesLattice Boltzmann Simulation StudiesPickering emulsions and particle stabilization

Actinobacteria mediated synthesis of nanoparticles and their biological properties: A review

Panchanathan Manivasagan、Jayachandran Venkatesan、Kannan Sivakumar 等 4 位作者2014-11-28Critical Reviews in Microbiology

Nanotechnology is gaining tremendous attention in the present century due to its expected impact on many important areas such as medicine, energy, electronics, and space industries. In this context, actinobacterial biosynthesis of nanoparticles is a reliable, eco-friendly, and important aspect of green chemistry appro…

Nanoparticles: synthesis and applicationsGraphene and Nanomaterials ApplicationsNanotechnology research and applications

Polymer foaming with chemical blowing agents: Experiment and modeling

José Antonio Reglero Ruiz、Michel Vincent、Jean‐François Agassant 等 6 位作者2014-11-28Polymer Engineering and Science

An experimental and theoretical analysis of the polypropylene foaming process using three different chemical blowing agents (CBA) was performed. A simple experiment was designed to analyze the foaming process of polypropylene (PP)/CO 2 system under two different pressure conditions. The expansion ratio and final foam…

Injection Molding Process and PropertiesPolymer Foaming and Composites