Document Detail


Evaluation of Colloids and Activation Agents for Determination of Melamine Using UV-SERS.
MedLine Citation:
PMID:  22428076     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
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, K(2)SO(4)) 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.
Authors:
Evelyn Kämmer; Thomas Dörfer; Andrea Csáki; Wilm Schumacher; Paulo Augusto Da Costa Filho; Nicolae Tarcea; Wolfgang Fritzsche; Petra Rösch; Michael Schmitt; Jürgen Popp
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-2-14
Journal Detail:
Title:  The journal of physical chemistry. C, Nanomaterials and interfaces     Volume:  116     ISSN:  1932-7455     ISO Abbreviation:  -     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-3-19     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101299949     Medline TA:  J Phys Chem C Nanomater Interfaces     Country:  -    
Other Details:
Languages:  ENG     Pagination:  6083-6091     Citation Subset:  -    
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