Mechanically controllable break junction device with multilevel control electrode spacing continuously changed as well as method

Abstract

The invention discloses a mechanically controllable break junction (MCBJ) device with multilevel control electrode spacing continuously changed as well as a method, applied to the field of molecular electronics. The mechanically controllable break junction device mainly comprises the following devices: a hydraulic cylinder, a piston push rod, an X axis linear displacement platform, a multichannelhydraulic valve, a support, a motor, a spiral push rod, a steel disc, a strut and a base, the hydraulic cylinder is divided into five hydraulic cylinders with different cross-sectional areas, a hydraulic cylinder with the largest cross-sectional area is pushed by moving pistons in four hydraulic cylinders with smaller cross-sectional areas and closing the valve, large cross-sectional area and small displacement are controlled by small cross-sectional area and large displacement, and high thrust is controlled by low thrust. When the mechanically controllable break junction device disclosed by the invention is acted on a nano break junction device chip, sub-femtometer-level precision control on distance between two electrodes can be realized, so that a molecular junction is precisely constructed. The mechanically controllable break junction device disclosed by the invention is a novel mechanically controllable break junction device and has longer displacement and more precise distance control compared with the traditional break junction device.

Description

technical field [0001] The invention relates to a mechanical device for constructing single-molecule junctions by using a mechanically controllable nano-fission method. It mainly involves hydraulic principles, including five hydraulic cylinders with different cross-sectional areas, and is specifically applied to the fields of molecular electronics and the like. Background technique [0002] The research and manufacture of molecular devices are inseparable from molecular electronics. The current main technical means for molecular research and measurement include electrochemical corrosion, electromigration, scanning tunneling microscope split junction (STM-BJ), atomic force microscope split Junction method (AFM-BJ), mechanically controlled split junction method (MCBJ), etc., among which mechanically controlled split junction method is widely used for its stability and precision. However, the mechanically controllable cracking device mainly used at present is mainly a piezoelec...

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