Laser-induced temperature jump electrochemistry on gold nanoparticle-coated electrodes

被引：39

作者：

Lowe, LB ^{[1
]}

Brewer, SH ^{[1
]}

Krämer, S ^{[1
]}

Fuierer, RR ^{[1
]}

Qian, GG ^{[1
]}

Agbasi-Porter, CO ^{[1
]}

Moses, S ^{[1
]}

Franzen, S ^{[1
]}

Feldheim, DL ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2003年 / 125卷 / 47期

关键词：

D O I：

10.1021/ja036672h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Laser-induced temperature jumps (LITJs) at gold nanoparticle-coated indium tin oxide (ITO) electrodes in contact with electrolyte solutions have been measured using temperature-sensitive redox probes and an infrared charge-coupled device. Upon irradiation with 532 nm light, interfacial temperature changes of ca. 20 °C were recorded for particle coverages of ca. 1 × 1010 cm-2. In the presence of a redox molecule, LITJ yields open-circuit photovoltages and photocurrents that are proportional to the number of particles on the surface. When ssDNA was used to chemisorb nanoparticles to the ITO surface, solution concentrations as low as 100 fM of target ssDNA-modified nanoparticles could be detected at the electrode surface. Copyright © 2003 American Chemical Society.

引用

页码：14258 / 14259

页数：2

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