Effects of plasmonic field due to gold nanoparticles and magnetic field on photocurrents of zinc porphyrin-viologen linked compound-gold nanoparticle composite films

被引：7

作者：

Yonemura, Hiroaki ^{[1
]}

Niimi, Tomoki ^{[2
]}

Yamada, Sunao ^{[1
]}

机构：

[1] Kyushu Univ, Fac Engn, Dept Appl Chem, Fukuoka 8190395, Japan

[2] Kyushu Univ, Grad Sch Engn, Dept Mat Phys & Chem, Fukuoka 8190395, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2016年 / 55卷 / 03期

关键词：

INTRAMOLECULAR ELECTRON-TRANSFER; TIME-RESOLVED EPR; SILVER NANOPARTICLES; PHOTOELECTROCHEMICAL RESPONSES; DECAY-RATES; POLYTHIOPHENE PHOTOELECTRODES; CHAIN-LENGTH; GENERATION; MECHANISM; PHOTOCONDUCTIVITY;

D O I：

10.7567/JJAP.55.03DD05

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Composite films of zinc-porphyrin-viologen (ZnP-V2+) linked compound containing six methylene group [ZnP(6)V]-gold nanoparticles (AuNP) were fabricated by combining electrostatic layer-by-layer adsorption and the Langmuir-Blodgett method. The anodic photocurrents of the ZnP(6)V-AuNP composite films are higher than those of the ZnP(6)V films. The large photocurrents in ZnP(6)V-AuNP composite films are most likely attributable to the combination of localized surface plasmon resonance due to AuNP and photoinduced intramolecular electron transfer from excited state of ZnP to V2+. The photocurrents of the ZnP(6)V-AuNP composite films increase in the presence of magnetic field. The photocurrents increase with low magnetic fields (B <= 150 mT) and are almost constant under high magnetic fields (B; 150 mT). Magnetic field effects (MFEs) were clearly observed for both ZnP(6)V-AuNP composite films and ZnP(6)V films. The MFEs can be explained by a radical pair mechanism. (C) 2016 The Japan Society of Applied Physics

引用

页数：8

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