Diamond, commonly known as diamond. In addition to being a precious jewel that we know about daily, diamond also has excellent physical and chemical properties. The diamond surface can be artificially modified to form stable surface terminals, such as hydrogen terminals, fluorine terminals, etc., which has great application prospects in the field of bioelectronics.
A few days ago, a team led by Professor Wang Hongxing of Xi’an Jiaotong University published research results on the manufacturing method of diamond fluorine terminal surface. The results are published in the Carbon Journal in the form of a paper, entitled "Electrochemical route to bio-compatible fluorine-terminated diamond surface" (Electrochemical route to bio-compatible fluorine-terminated diamond surface).
In the research, the team proposed a new method to electrochemically modify the surface of the hydrogen-side diamond in the LiF dielectric MISFET at room temperature. The chemical reaction is 2F-+C-H+2h+→C-F+HF.
According to the measurement result of X-ray photoelectron spectroscopy of diamond, C-F bond is produced after electrochemical modification. A model is proposed to explain the electrochemical modification on MISFET. In this model, the theoretical electrolysis voltage of F- is calculated to be -3.8V, which is consistent with the experimental value -5V.
This study successfully used electrochemical methods to manufacture fluorine-terminated diamonds, and proposed a model to explain the electrochemical modification process. The research results have opened up new directions for the application of diamond in the fields of biological detection and biosensing.
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