摘要
Self-assembled monolayers（SAMs） of thiol-derivatized porphyrin molecules on Au substrate have attracted extensively interest for use in sensing,optoelectronic devices and molecular electronics.In this paper,tetra-[p-（3-mercaptopropyloxy）-phenyl]porphyrin was synthesized and self-assembled with thiol on Au substrate for porphyrin SAMs（PPS 4）.The electrochemical results demonstrated that PPS 4 could form excellent SAMs on gold surface.Self-assembled nanojunctions of PPS 4 were fabricated by using gold nanogap electrodes（gap width：ca.100 nm）.With the light on/off,the nanojunctions showed current high/low as nanometer scaled photo switch.
Self-assembled monolayers（SAMs） of thiol-derivatized porphyrin molecules on Au substrate have attracted extensively interest for use in sensing,optoelectronic devices and molecular electronics.In this paper,tetra-[p-（3-mercaptopropyloxy）-phenyl]porphyrin was synthesized and self-assembled with thiol on Au substrate for porphyrin SAMs（PPS 4）.The electrochemical results demonstrated that PPS 4 could form excellent SAMs on gold surface.Self-assembled nanojunctions of PPS 4 were fabricated by using gold nanogap electrodes（gap width：ca.100 nm）.With the light on/off,the nanojunctions showed current high/low as nanometer scaled photo switch.
基金
supported by the funds of the National Natural Science Foundation of China (Nos.21175108 and 21165016)
the project of education department of Gansu Province (No. 0928B-02)
