321 Result(s)
within
**-**a Ding
Condensed Matter Physics
Materials Science, general
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Article
Enhanced ethanol production inside carbon-nanotube reactors containing catalytic particles
Carbon nanotubes (CNTs) have well-defined hollow interiors and exhibit unusual mechanical and thermal stability as well as electron conductivity1. This opens intriguing possibilities to introduce other matter int...
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Article
Open AccessControlled nanocutting of graphene
Rapid progress in graphene-based applications is calling for new processing techniques for creating graphene components with different shapes, sizes, and edge structures. Here we report a controlled cutting pr...
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Multi-quantum-well nanowire heterostructures for wavelength-controlled lasers
Nanowire lasers have so far consisted of homogeneous semiconductor structures. The achievement of lasing from a multi-quantum-well heterostructure deposited on a nanowire demonstrates a new complexity in nanop...
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Article
Open AccessAu-Ag alloy nanoporous nanotubes
Metallic nanostructures with hollow interiors or tailored porosity represent a special class of attractive materials with intriguing chemicophysical properties. This paper presents the fabrication of a new typ...
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Open AccessRole of catalysts in the surface synthesis of single-walled carbon nanotubes
We demonstrate the role of catalysts in the surface growth of single-walled carbon nanotubes (SWNTs) by reviewing recent progress in the surface synthesis of SWNTs. Three effects of catalysts on surface synthe...
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Article
Open AccessDirect observation of the strong interaction between carbon nanotubes and quartz substrate
We present a chemical vapor deposition (CVD) method for the growth of uniform single-walled carbon nanotube (SWNT) arrays on a stable temperature (ST)-cut single crystal quartz substrate using a mixture of met...
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Article
Open AccessAligned graphene nanoribbons and crossbars from unzipped carbon nanotubes
Aligned graphene nanoribbon (GNR) arrays have been made by unzip** of aligned single-walled and few-walled carbon nanotube (CNT) arrays. Nanotube unzip** was achieved by a polymer-protected Ar plasma etchi...
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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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Article
Open AccessEfficient synthesis of PbTe nanoparticle networks
The synthesis of semiconductor nanocrystalline networks using weak cap** ligands in aqueous media has been demonstrated. Carbohydrates, including ?-cyclodextrin, D-(+)-glucose, D-glucosamine, lactobionic acid, ...
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Article
Gene libraries open up
By combining gene cloning and amplification techniques, a new one-pot, parallel synthesis method for the generation of long, repetitive genes is realized. The method promises to open up the discovery of protei...
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Article
Open AccessHierarchical manganese oxide/carbon nanocomposites for supercapacitor electrodes
MnO2/carbon nanocomposites with hierarchical pore structure and controllable MnO2 loading have been synthesized using a self-limiting growth method. This was achieved by the redox reactions of KMnO4 with sacrific...
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Article
Resha** the tips of ZnO nanowires by pulsed laser irradiation
Vertically aligned ZnO nanowires have been synthesized by a hydrothermal method. After being irradiated by a short laser pulse, the tips of the as-synthesized ZnO nanowires can be tailored into a spherical sha...
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Article
Nanostructured high-strength molybdenum alloys with unprecedented tensile ductility
The high-temperature stability and mechanical properties of refractory molybdenum alloys are highly desirable for a wide range of critical applications. However, a long-standing problem for these alloys is tha...
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Article
Deriving the three-dimensional structure of ZnO nanowires/nanobelts by scanning transmission electron microscope tomography
Characterizing the three-dimensional (3D) shape of a nanostructure by conventional imaging techniques in scanning electron microscopy and transmission electron microscopy can be limited or complicated by vario...
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Article
Symmetric and antisymmetric nonlinear modes supported by dual local gain in lossy lattices
We introduce a discrete lossy system, into which a double “hot spot” (HS) is inserted, i.e., two mutually symmetric sites carrying linear gain and cubic nonlinearity. The system can be implemented as an array ...
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Article
Piezoresistive effect in MoO3 nanobelts and its application in strain-enhanced oxygen sensors
MoO3 nanobelts (NBs) having different properties have been synthesized via a physical vapor deposition (PVD) method. The crystallographic structures and morphologies of the NBs were characterized by X-ray diffrac...
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Article
Combinatorial development of bulk metallic glasses
The identification of multicomponent alloys out of a vast compositional space is a daunting task, especially for bulk metallic glasses composed of three or more elements. Despite an increasing theoretical unde...
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Article
Ultra-thin layer structured anodes for highly durable low-Pt direct formic acid fuel cells
Direct formic acid fuel cells (DFAFCs) allow highly efficient low temperature conversion of chemical energy into electricity and are expected to play a vital role in our future sustainable society. However, th...
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Article
Preparation and electrocatalytic properties of triuranium octoxide supported on reduced graphene oxide
Triuranium octoxide-reduced graphene oxide (U3O8/rGO) hybrids have been prepared by a two-step solution-phase method. The presence of GO is essential in order to obtain pure phase U3O8. The U3O8/rGO hybrids exhib...
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Article
Transient response of carbon nanotube integrated circuits
The speed of frequency response of all published carbon nanotube (CNT) integrated circuits (ICs) is far from that predicted. The transient response of CNT ICs is explored systematically through the combination...
