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Highly Sensitive SERS Platforms Based on Silver Nanostructures Fabricated on Polyaniline Membrane Surfaces.
MedLine Citation:
PMID:  22548473     Owner:  NLM     Status:  Publisher    
Here we demonstrate a facile synthesis of homogeneous Ag nanostructures fully covering the polyaniline (PANI) membrane surface simply by introducing organic acid in the AgNO3 reaction solution, as an improved technique to fabricate well-defined Ag nanostructures on PANI substrates through direct chemical deposition method (Langmuir, 2010, 26, 8882). It is found that the chemical nature of acid is crucial to create a homogeneous nucleation environment for Ag growth, where in this case homogeneous Ag nanostructures that are assembled by Ag nanosheets are produced with the assistance of succinic acid and lactic acid, but only scattered Ag particles with camphorsulfonic acid. Improved surface wettability of PANI membranes after acid doping may also account for the higher surface coverage of Ag nanostructures. The Ag nanostructures fully covering the PANI surface are extremely sensitive in detection of a target analyte, 4-mercaptobenzoic acid (4-MBA) using surface enhanced Raman spectroscopy (SERS), with a detection limit of 10-12 M. We believe the facilely fabricated SERS-active substrates based on conducting polymer-mediated growth of Ag nanostructures can be promising in trace detection of chemical and biological molecules.
Jun Yan; Xijiang Han; Jiaojiao He; Leilei Kang; Bin Zhang; Yunchen Du; Hongtao Zhao; Cunku Dong; Hsing-Lin Wang; Ping Xu
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-1
Journal Detail:
Title:  ACS applied materials & interfaces     Volume:  -     ISSN:  1944-8252     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-2     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101504991     Medline TA:  ACS Appl Mater Interfaces     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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