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用电化学循环伏安法和电化学扫描隧道显微镜(STM)研究了0.1mol/L HClO_4溶液中偶氮分子4-(4-硝基苯基偶氮)-1-萘酚(NPAN)在Au(111)电极上的吸附。结果表明,相对于基底NPAN分子在电极上可以形成稳定的(6×4)单分子结构,吸附的分子平面与基底相平行。另一方面,NPAN分子的吸附也可以阻止发生在电极表面上的氧化还原反应。根据实验结果提出了分子的吸附模型,解释了分子的STM图像。
The effects of the concentration of azo-molecule 4- (4-nitrophenylazo) -1-naphthol (NPAN) in 0.1mol / L HClO_4 solution on the electrochemical properties of Au (111) electrode adsorption. The results show that the NPAN molecule can form a stable (6 × 4) monomolecular structure on the electrode, and the adsorbed molecular plane is parallel to the substrate. On the other hand, the adsorption of NPAN molecules can also prevent redox reactions that occur on the surface of the electrode. Based on the experimental results, the adsorption model of the molecule is proposed, which explains the STM image of the molecule.