SERS Not To Be Taken for Granted in the Presence of Oxygen

被引：158

作者：

Erol, Melek ^{[2
]}

Han, Yun ^{[1
]}

Stanley, Scott K. ^{[3
]}

Stafford, Christopher M. ^{[3
]}

Du, Henry ^{[1
]}

Sukhishvili, Svetlana ^{[2
]}

机构：

[1] Stevens Inst Technol, Dept Chem Engn & Mat Sci, Hoboken, NJ 07030 USA

[2] Stevens Inst Technol, Dept Chem Chem Biol & Biomed Engn, Hoboken, NJ 07030 USA

[3] NIST, Div Polymers, Gaithersburg, MD 20899 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 22期

关键词：

SURFACE-ENHANCED RAMAN; DENSITY-FUNCTIONAL THEORY; SILVER NANOPARTICLES; AG NANOPARTICLES; SCATTERING; SPECTROSCOPY; ADSORPTION; OXIDATION; MOLECULES;

D O I：

10.1021/ja807458x

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Oxidation of the Ag nanoparticle surface has a dramatic effect on the adsorption, orientation, and SERS detection limit of nitroaromatic molecules in aqueous solutions. Ultrasensitive SERS detection of p-nitrophenol can be achieved when oxidation of surface-immobilized Ag nanoparticles is inhibited by replacing the oxygen dissolved in water with argon gas. The presence of silver oxide at the nanoparticle surface hinders charge transfer between the aromatic ring and the underlying Ag metal surface and drastically decreases the overall detection sensitivity.

引用

页码：7480 / +

页数：3

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