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Preparation method of single-layer graphene single molecule junction with mechanically controllable nanometer gap

A single-layer graphene, nano-gap technology, applied in the fields of chemistry, molecular electronics, and nanomaterials, can solve the problems of consuming manpower, material and financial resources, the results may not be achieved, and the success rate is low, achieving good stability and The effect of conductivity

Inactive Publication Date: 2017-10-20
NANKAI UNIV
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Problems solved by technology

[0004] Usually, even if some methods use single-layer graphene as an electrode to prepare single-molecule junctions, the success rate is low, consuming a lot of manpower, material and financial resources, and the results may not be realized.

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  • Preparation method of single-layer graphene single molecule junction with mechanically controllable nanometer gap
  • Preparation method of single-layer graphene single molecule junction with mechanically controllable nanometer gap
  • Preparation method of single-layer graphene single molecule junction with mechanically controllable nanometer gap

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Embodiment Construction

[0024] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] A copper foil (1) with a length of 44mm, a width of 12mm, and a thickness of about 50μm is used as a substrate, and a single-layer graphene (2) is grown by CVD; SiO is prepared on a copper sheet (5) 2 (4) Coating: add a certain amount of silicic acid (SiO 2 xH2O), constant temperature magnetic stirring at room temperature, to obtain SiO 2 Saturated fluorosilicic acid solution; take a certain volume of saturated solution, add deionized water, stir at a constant temperature and magnetic force for a period of time at 30°C, and prepare SiO with a certain concentration of fluorosilicic acid 2 supersaturated solution, that is, the preparation of SiO 2 Film growth solution; put the cleaned copper substrate into a beaker. After a certain period of time, take out the sample piece, dry it with a fan, and place it in a desiccator ...

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Abstract

The invention discloses a method for a single-layer graphene electrode capable of precisely controlling the nanometer gap, as well as a technology and process flow for constructing a single-molecule junction with graphene as an electrode. The invention is realized by utilizing the single-layer thin film preparation technology, micro-nano processing related technology and mechanical controllable cracking technology. By placing the prepared single-layer graphene chip on a mechanically controllable three-point bending device, the substrate is continuously bent to break the single-layer graphene to form a single-layer graphene electrode pair with a controllable nanometer gap. Finally, single-layer graphene single-molecule junctions are formed by linking organic molecules between the gaps using amide covalent bonds. Since this method can precisely adjust the size of the nano-gap to match the molecular length at the picometer level, it can achieve high-efficiency mass production of single-layer graphene single-molecule junctions. Moreover, single-layer graphene has stable properties, which improves the stability of single-molecule junction devices, lays the foundation for the industrialization of molecular devices, and has great significance in the development of molecular electronics.

Description

technical field [0001] The invention belongs to a single-molecule junction with a mechanically controllable nano-gap using single-layer graphene as an electrode, and relates to molecular electronics, nanomaterials, chemistry and many other fields. Background technique [0002] In the trend of miniaturization of electronic devices, molecular electronics has developed rapidly in recent years, and various molecular junction technologies have emerged as the times require. Moreover, compared with the multi-molecular junction, the unimolecular junction is smaller but does not lose its original characteristics, so the unimolecular junction has been greatly developed. So far, there are many techniques for constructing unimolecular junctions, including electromigration, electrochemical deposition, surface expansion-mediated deposition, scanning probe microscopy, and mechanically controlled fracture junctions. Compared with other technologies, the mechanically controlled fracture jun...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B81C1/00
CPCB81C1/00349B81C1/00134B81C1/00912
Inventor 向东倪立发张伟强郭晨阳王璐王玲赵智凯张天
Owner NANKAI UNIV
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