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Improved stabilities on surface-enhanced Raman scattering-active Ag/Al(2)O(3) films on substrates.
MedLine Citation:
PMID:  23115774     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
As is shown in the literature, surface-enhanced Raman scattering (SERS)-active Ag films obtained by the salting-out of Ag colloids from solutions with some salts, are popularly used to examine the structure of analytes. SERS-active Ag nanoparticles (NPs) demonstrate more significant SERS effects than Au NPs, however, problems regarding the stabilities of SERS-active Ag NPs remain to be overcome. In this work, Ag/Al(2)O(3) colloids were prepared in 0.1 M HNO(3) solutions containing Al(2)O(3) NPs with higher heat capacity by sonoelectrochemical methods. SERS-active Ag/Al(2)O(3) films deposited on glass slides were prepared by the addition of a saturated NaCl solution in the prepared Ag/Al(2)O(3) colloids-containing solution. In an acceptable sacrifice of Raman intensity by ca. 30% magnitude, the prepared Ag/Al(2)O(3) films markedly improved thermal stability by raising the operation temperature over 100 °C, compared to Ag films. Meanwhile, aging of SERS enhancement capability in an atmosphere of relative humidity (RH) of 50% and 20% (v/v) O(2) at 30 °C is significantly depressed using Ag/Al(2)O(3) films.
Authors:
Fu-Der Mai; Kuang-Hsuan Yang; Yu-Chuan Liu; Ting-Chu Hsu
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-31
Journal Detail:
Title:  The Analyst     Volume:  -     ISSN:  1364-5528     ISO Abbreviation:  Analyst     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-11-1     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372652     Medline TA:  Analyst     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Biochemistry, School of Medicine, College of Medicine, Taipei Medical University, No. 250, Wu-Hsing St, Taipei 11031, Taiwan. liuyc@tmu.edu.tw.
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