Nanowire structures comprising carbon

A nanostructure and nanowire technology, applied in structural parts, nanotechnology, nanotechnology, etc., can solve the problem that nanowires are not disclosed

Active Publication Date: 2009-10-21
ONED MATERIAL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] So far, structures combining nanowires such as semiconductor nanowires and graphene layers have not been disclosed
Furthermore, nanowires composed of carbon or covered with a carbon-based layer have not been disclosed so far

Method used

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  • Nanowire structures comprising carbon
  • Nanowire structures comprising carbon
  • Nanowire structures comprising carbon

Examples

Experimental program
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Effect test

preparation example Construction

[0192] In another embodiment, such as Figure 23 As shown in the flowchart 2300 of the present invention, the preparation method of the membrane electrode assembly of the present invention further includes: before disposing the first composition 2404 of the catalyst metal-associated nanowire (for example, a nanowire solution containing an ionomer) in step 2304 , in step 2310, a masking layer (eg, a metal film or foil) is disposed adjacent to the gas diffusion layer 2402 to cover at least the edges of the gas diffusion layer. mask layer in Figure 24 Not shown in , but suitably, the masking layer is prepared so that it covers the edges of the gas diffusion layer 2402 but leaves an open, unmasked portion in the center of the gas diffusion layer 2402 . Such as Figure 24 As shown, arranging a first composition containing catalyst metal-associated nanowires (e.g., a nanowire solution containing an ionomer) produces an assembly in which the center of the gas diffusion layer is co...

Embodiment 1

[0215] Embodiment 1: Preparation of nanowire structure

[0216] will be coated with WO 3 The silicon nanowires were heated at 650°C for 30 minutes, and then heated at 1250°C for 6 minutes in the presence of a flowing gas mixture containing Ar (430cc / min), H 2 (130cc / min) and CH in Ar 4 (228cc / min). After fabrication for cooling, an interconnected nanowire network 300 comprising interconnected nanowire structures 100 is formed. The nanowire structure 100 includes a Si nanowire core 102 , a carbon-based layer 104 (SiC / WC interface carbide layer) and a carbon-based structure 106 (graphene nanographite sheet) connecting the nanowire structure 100 .

Embodiment 2

[0217] Example 2: Deposition of nanoparticles on nanowires

[0218] Approximately 10 mg of Si nanowires were dispersed in ethanol by sonication to form a nanowire suspension. By vacuum filtering the nanowire suspension on a polyvinylidene fluoride (PVDF) membrane and vacuum drying, then adding 2cc of 0.1% polylysine solution to the filter funnel to adsorb polylysine on On the surface of the nanowires, a network of interconnected nanowires is produced. After 5 minutes, all liquid in the funnel was removed by vacuum, and the nanowire network was separated from the PVDF membrane. After drying in an oven at 100° C. for 15 minutes, the nanowire network was immersed in 10 cc of Au colloid solution (10 nm colloid) and soaked for 20 minutes to adsorb Au nanoparticles on the surface of the nanowires. Finally, the nanowire network was removed from the Au colloid solution, rinsed with isopropanol (IPA), and dried at 100° C. to obtain a nanowire network coated with gold nanoparticles. ...

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Abstract

The present invention is directed to nanowire structures and interconnected nanowire networks comprising such structures, as well as methods for their production. The nanowire structures comprise a nanowire core, a carbon-based layer, and in additional embodiments, carbon-based structures such as nanographitic plates consisting of graphenes formed on the nanowire cores, interconnecting the nanowire structures in the networks. The networks are porous structures that can be formed into membranes or particles. The nanowire structures and the networks formed using them are useful in catalyst and electrode applications, including fuel cells, as well as field emission devices, support substrates and chromatographic applications.

Description

technical field [0001] The present invention relates to various nanowire structures, and to interconnected nanowire networks comprising such structures. The invention also relates to the use of these nanowire structures and interconnected nanowire networks in fuel cells, as field emission elements and other applications such as chromatography materials. Background of the invention [0002] Nanomaterials, especially nanowires, have the potential to drive a whole new generation of electronic devices. For example, in some cases the use of nanomaterials has been proposed, thus exploiting the unique and interesting properties of these materials as monolithic materials rather than as individual components requiring various combinations. For example, Duan et al., Nature 425:274-278 (September 2003) disclose a nanowire-based transistor for large-area electronic substrates such as displays, antennas, etc., using a monolithically processed, oriented semiconductor nanowire film or la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M8/10H01M4/92H01M4/88H01M4/583
CPCY02E60/12Y02E60/523B82Y30/00H01M4/583Y02E60/13H01M4/8605H01M4/8807H01M8/1002H01G11/36H01M10/52H01M4/92H01M4/8657H01M8/1007Y02E60/10Y02E60/50Y02P70/50H01M4/86
Inventor 牛春明
Owner ONED MATERIAL INC
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