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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 substrates have attracted extensive interest for use in sensing, optoelectronic devices and molecular electronics. In this paper, tetra- [p- (3-mercaptopropyloxy) -phenyl] synthesized and self-assembled with thiol on Au substrate for porphyrin SAMs (PPS 4). The electrochemical results of that PPS 4 could form excellent SAMs on gold surface. Self-assembled nanojunctions of PPS 4 were fabricated by using gold nanogap electrodes : ca.100 nm) .With the light on / off, the nanojunctions showed current high / low as nanometer scaled photo switch.