Double-self-assembly molecular layer molecular junction device and preparation method and application thereof

Abstract

The invention discloses a double-self-assembly molecular layer molecular junction device and a preparation method and application thereof. The double-self-assembly molecular layer molecular junction device comprises a bottom electrode, a first to-be-detected molecular layer and gold nanowires. The bottom electrode comprises a silicon wafer, a silicon dioxide layer attached to the silicon wafer, amain skeleton, a peripheral frame and floating island electrodes, wherein the main skeleton and the floating island electrodes are located in the peripheral frame, protruding tips are formed on the main skeleton, the number of the tips is the same as that of the floating island electrodes, and each tip is opposite to one floating island electrode; the main skeleton, the peripheral frame and the floating island electrode have the same composition; the gold layer is connected with a first to-be-detected molecular layer; a gold nanowire is connected between each tip and the corresponding floatingisland electrode opposite to the tip; and the gold nanowire is coated with a second to-be-detected molecular layer. The upper electrode and the lower electrode are both made of solid metal gold, which belongs to solid devices, and are high in stability, so that the problem of electric leakage caused by liquid metal or liquid environment is avoided, and it is ensured that the test can be carried out in various environments.

Description

technical field [0001] The invention belongs to the technical field of organic electronics, and specifically relates to a double self-assembled molecular layer molecular junction device and its preparation method and application. Background technique [0002] Molecular electronics studies the transport mechanism of charges in molecules by constructing "electrode-molecule-electrode" structural devices. It is used to reveal the electron transfer process at the microscopic scale, which is of great significance in the study of chemical reaction mechanisms and charge transfer in life systems. Due to the limitations of microfabrication technology and microscale manipulation technology, traditional molecular electronic devices are based on single-layer self-assembled molecular layer devices. When studying the charge transport process of complex systems, it is limited by the difficulty of molecular synthesis and cannot be systematically In-depth study of charge transport mechanisms....

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Problems solved by technology

However, all the dual self-assembled structure devices reported so far have the problems of difficult construction of the top electrode, poor repeatability, and poor stability, and without exception, it is impossible to realize variable temperature research, which greatly limits the development of molecular electronics. , it still needs continuous research and exploration by researchers in related fields

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