Graphene nanoribbons, methods of making same, and uses thereof

A technology of graphene nanobelts and equipment, applied in the preparation of GNR, the field of preparation of GNR

Active Publication Date: 2014-03-12
CORNELL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inability to obtain high molecular weight polymers, and the difficulty in modifying the structure of said polymers, severely limits the application of this method

Method used

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  • Graphene nanoribbons, methods of making same, and uses thereof
  • Graphene nanoribbons, methods of making same, and uses thereof
  • Graphene nanoribbons, methods of making same, and uses thereof

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Embodiment 1

[0080] Photoemission and excitation spectra were recorded on a Horiba Jobin Yvon Fluorolog-3 fluorescence spectrophotometer equipped with a 450WXe lamp, dual excitation and dual emission monochromators, digital photon counting photomultiplier tubes and a secondary InGaAs detector for the NIR range. A solid-state silicon photodiode was used as a control to correct for changes in lamp intensity with time and wavelength. Spectra were further corrected using instrument-generated emission calibration curve multiplication to correct for variations in photomultiplier tube response with wavelength and for path differences between samples and controls.

[0081] Raman spectra were recorded on a Renishaw InVia confocal Raman microscope with an excitation wavelength of 488 nm. The samples were drop coated on Si wafers.

[0082] in N 2 In the atmosphere, under the condition of 10°C / min temperature increase and no equilibrium delay, the thermogravimetric analysis was carried out in the TA...

Embodiment 2

[0125] Results and discussion. p-Terphenyl-alt-phenyl PPE1 was obtained by copolymerizing the appropriate terphenyldiyne monomer and 1,4-diiodobenzene under Sonogashira cross-coupling conditions. A substoichiometric monofunctional aryl iodide (4-iodoanisole) was used to control the molecular weight of the polymer and the nature of the end groups. Nevertheless, 1 was insoluble in the reaction mixture with a molecular weight of about 100 kDa, and it partially precipitated during the polymerization. Results Bimodal molecular weight distribution (M n =7.85kDa; M w =27.7kDa; PDI=3.53), which consists of a low molecular weight main peak and a high molecular weight shoulder ( Figure 13 ). These molecular weights are determined by multi-angle light scattering, which directly detects the mass of the polymer and does not rely on comparisons to polymer standards of unreliable applicability. Despite its broad molecular weight distribution, 1 was not split into high and low molecular...

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Abstract

Provided are graphene nanoribbons (GNR), methods of making GNR, and uses of the GNR. The methods can provide control over GNR parameters such as, for example, length, width, and edge composition (e.g., edge functional groups). The methods are based on a metal catalyzed cycloaddition reaction at the carbon-carbon triple bonds of a poly(phenylene ethynylene) polymer. The GNR can be used in devices such as microelectronic devices.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Patent Application No. 61 / 479,998, filed April 28, 2011, which is incorporated herein by reference. [0003] Statement Regarding Federally Funded Research [0004] This invention was made with government support under grant number CHE-1124574 funded by the National Science Foundation of the United States. The US Government has certain rights in this invention. technical field [0005] The present invention mainly relates to graphene nanoribbon (GNR) and a preparation method of GNR. More specifically, the present invention relates to a method for the preparation of GNRs using a metal-catalyzed cycloaddition reaction to aromatically annulate the carbon-carbon triple bonds of polyphenylene acetylene polymers. Background technique [0006] Graphene nanoribbons are long, narrow single-layer graphene, which is one of the most promising alternatives to silicon in MOSFETs. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C08G61/12H01L51/50H01L31/042B82B3/00B82Y40/00
CPCC08G2261/95C08G61/02H01L29/1606Y10S977/842C01B2204/065C01B2204/06C08G2261/91B82Y10/00C08G2261/3422C08G2261/92H01B1/04C01B31/0446C08G2261/148Y02E10/52B82Y30/00Y10S977/932H01L51/0045H01L21/02527C07C2/84C08G61/10C07C15/20H01L21/0262C08G2261/72H01L31/1884B82Y40/00Y10S977/734Y02E10/549C01B32/184Y10T428/2982H10K85/20Y02E10/50
Inventor W·R·迪希特尔H·阿斯兰F·J·乌里贝-罗莫
Owner CORNELL UNIVERSITY
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