Evaluation of Colloids and Activation Agents for Determination of Melamine Using UV-SERS

被引：41

作者：

Kaemmer, Evelyn ^{[1
,2
,4
]}

Doerfer, Thomas ^{[1
,2
,4
]}

Csaki, Andrea ^{[4
]}

Schumacher, Wilm ^{[1
,2
]}

Da Costa Filho, Paulo Augusto ^{[3
]}

Tarcea, Nicolae ^{[1
,2
]}

Fritzsche, Wolfgang ^{[4
]}

Roesch, Petra ^{[1
,2
]}

Schmitt, Michael ^{[1
,2
]}

Popp, Juergen ^{[1
,2
,4
]}

机构：

[1] Univ Jena, Inst Phys Chem, D-07743 Jena, Germany

[2] Univ Jena, Abbe Ctr Photon, D-07743 Jena, Germany

[3] Nestle Res Ctr, Qual & Safety Dept, CH-1000 Lausanne 26, Switzerland

[4] Inst Photon Technol, D-07745 Jena, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 10期

关键词：

ENHANCED RAMAN-SCATTERING; RENAL-FAILURE; CYANURIC ACID; SURFACE; NANOPARTICLES; SPECTROSCOPY; ADSORPTION; SPECTRUM; FORMULA; MILK;

D O I：

10.1021/jp211863y

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

UV-SERS measurements offer a great potential for environmental or food (detection of food contaminats) analytics. Here, the UV-SERS enhancement potential of various kinds of metal colloids, such as Pd, Pt, Au, Ag, Au-Ag core-shell, and Ag-Au core-shell with different shapes and sizes, were studied using melamine as a test molecule. The influence of different activation (KF, KCl, KBr, K2SO4) agents onto the SERS activity of the nanomaterials was investigated, showing that the combination of a particular nanoparticle with a special activation agent is extremely crucial for the observed SERS enhancement. In particular, the size dependence of spherical nanoparticles of one particular metal on the activator has been exploited. By doing so, it could be shown that the SERS enhancement increases or decreases for increasing or decreasing size of a nanoparticle, respectively. Overall, the presented results demonstrate the necessity to adjust the nanoparticle size and the activation agent for different experiments in order to achieve the best possible UV-SERS results.

引用

页码：6083 / 6091

页数：9

共 43 条

[1] Optical properties and growth aspects of silver nanoprisms produced by a highly reproducible and rapid synthesis at room temperature [J].