909 Result(s)
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Open AccessBioconjugated silica nanoparticles: Development and applications
Advanced bioanalysis, including accurate quantitation, has driven the need to understand biology and medicine at the molecular level. Bioconjugated silica nanoparticles have the potential to address this emerg...
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Open AccessComputational model of edge effects in graphene nanoribbon transistors
We present a semi-analytical model incorporating the effects of edge bond relaxation, the third nearest neighbor interactions, and edge scattering in graphene nanoribbon field-effect transistors (GNRFETs) with...
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Open AccessTwo-photon luminescence imaging of Bacillus spores using peptide-functionalized gold nanorods
Bacillus subtilis spores (a simulant of Bacillus anthracis) have been imaged by two-photon luminescence (TPL) microscopy, using gold nanorods (GNRs) functionalized with a cysteine-terminated homing peptide. Contr...
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Open AccessA nano- and micro- integrated protein chip based on quantum dot probes and a microfluidic network
A novel nano- and micro-integrated protein chip (NMIPC) that can detect proteins with ultrahigh sensitivity has been fabricated. A microfluidic network (µFN) was used to construct the protein chips, which allo...
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Open AccessFacile fabrication of hierarchically porous carbonaceous monoliths with ordered mesostructure via an organic organic self-assembly
A simple strategy for the synthesis of macro-mesoporous carbonaceous monolith materials has been demonstrated through an organic-organic self-assembly at the interface of an organic scaffold such as polyuretha...
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Open AccessFabrication of ordered magnetite-doped rare earth fluoride nanotube arrays by nanocrystal self-assembly
We describe a nanocrystal self-assembly method for the preparation of rare earth fluoride nanotube (ReF-NT) arrays and magnetite-doped rare earth fluoride nanotubes (Fe3O4-ReF-NTs) by using porous anodic aluminum...
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Open AccessSelf-assembly of luminescent twisted fibers based on achiral quinacridone derivatives
It is a great challenge to spontaneously assemble achiral molecules into twisted nanostructures in the absence of chiral substances. Here we show that two achiral centrosymmetric quinacridone (QA) derivatives, N,...
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Open AccessProcess intensification by CO2 for high quality carbon nanotube forest growth: Double-walled carbon nanotube convexity or single-walled carbon nanotube bowls?
Introduction of CO2 is a facile way to tune the growth of vertically aligned double- or single-walled carbon nanotube (CNT) forests on wafers. In the absence of CO2, a double-walled CNT convexity was obtained. Wi...
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Open AccessPullulan acetate coated magnetite nanoparticles for hyper-thermia: Preparation, characterization and in vitro experiments
Amphipathic polymer pullulan acetate (PA)-coated magnetic nanoparticles were prepared and characterized by various physicochemical means. The cytotoxicity and cellular uptake of the magnetic nanoparticles were...
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Open AccessEfficient synthesis of graphene nanoribbons sonochemically cut from graphene sheets
We report a facile approach to synthesize narrow and long graphene nanoribbons (GNRs) by sonochemically cutting chemically derived graphene sheets (GSs). The yield of GNRs can reach ∼5 wt% of the starting GSs....
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Open AccessLithography-free fabrication of high quality substrate-supported and freestanding graphene devices
We present a lithography-free technique for fabrication of clean, high quality graphene devices. This technique is based on evaporation through hard Si shadow masks, and eliminates contaminants introduced by l...
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Open AccessExchange-biased NiFe2O4/NiO nanocomposites derived from NiFe-layered double hydroxides as a single precursor
NiFe2O4 nanoparticles (<10 nm) embedded in a NiO matrix have been fabricated by calcining the corresponding NiIIFeIII-layered double hydroxide (LDH) precursors at high temperature (500 °C). Compared with the NiFe
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Open AccessHierarchical silver indium tungsten oxide mesocrystals with morphology-, pressure-, and temperature-dependent luminescence properties
Highly hierarchical structures of silver indium tungsten oxide (AgIn(WO4)2) mesocrystals can be rationally fabricated via the microwave-assisted synthesis method by tuning the initial concentrations of the precur...
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Open AccessBiosynthesis of biocompatible cadmium telluride quantum dots using yeast cells
We demonstrate a simple and efficient biosynthesis method to prepare easily harvested biocompatible cadmium telluride (CdTe) quantum dots (QDs) with tunable fluorescence emission using yeast cells. Ultraviolet...
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Open AccessFacile synthesis of porous carbon nitride spheres with hierarchical three-dimensional mesostructures for CO2 capture
Porous carbon nitride (CN) spheres with partially crystalline frameworks have been successfully synthesized via a nanocasting approach by using spherical mesoporous cellular silica foams (MCFs) as a hard templ...
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Open AccessSynthesis of porous NiO nanocrystals with controllable surface area and their application as supercapacitor electrodes
We report a facile way to grow various porous NiO nanostructures including nanoslices, nanoplates, and nanocolumns, which show a structure-dependence in their specific charge capacitances. The formation of con...
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Open AccessTowards flexible all-carbon electronics: Flexible organic field-effect transistors and inverter circuits using solution-processed all-graphene source/drain/gate electrodes
Flexible organic field-effect transistors (OFETs) using solution-processable functionalized graphene for all the electrodes (source, drain, and gate) have been fabricated for the first time. These OFETs show p...
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Article
Linear strain-gradient effect on the energy bandgap in bent CdS nanowires
Although possible non-homogeneous strain effects in semiconductors have been investigated for over a half century and the strain-gradient can be over 1% per micrometer in flexible nanostructures, we still lack...
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Scanning tunneling microscope observations of non-AB stacking of graphene on Ni films
Microscopic features of graphene segregated on Ni films prior to chemical transfer—including atomic structures of monolayers and bilayers, Moiré patterns due to non-AB stacking, as well as wrinkles and ripples...
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Tunable separation of single-walled carbon nanotubes by dual-surfactant density gradient ultracentrifugation
We present a systematic study of the effects of surfactants in the separation of single-walled carbon nanotubes (SWNTs) by density gradient ultracentrifugation (DGU). Through analysis of the buoyant densities,...
