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231224s2011 xx |||||o 00| ||eng c |
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|a 10.1021/la203049k
|2 doi
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|a pubmed24n0708.xml
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|a (DE-627)NLM212344064
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|a (NLM)22011076
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|a DE-627
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|e rakwb
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|a eng
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|a Li, Ju-Mei
|e verfasserin
|4 aut
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|a Detecting trace melamine in solution by SERS using Ag nanoparticle coated poly(styrene-co-acrylic acid) nanospheres as novel active substrates
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|c 2011
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 27.03.2012
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|a Date Revised 21.11.2013
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2011 American Chemical Society
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|a A systematic study for the preparation of Ag nanoparticle (Ag-NP) coated poly(styrene-co-acrylic acid) (PSA) composite nanospheres by in situ chemical reduction is reported. The experimental results showed that the reaction temperature and the surface coverage of the -COOH determined the surface coverage and grain size of Ag nanoparticles on the PSA nanospheres. The surface enhanced Raman spectroscopy (SERS) sensitivity was investigated using 4-hydroxythiophenol (4-HBT) as the model probe in the solution of composite nanospheres stabilized by polyvinylpyrrolidone (PSA/Ag-NPs/PVP), with the detection limit of about 1 × 10(-6) M. Potential application of the new SERS substrate was demonstrated with the detection of melamine, and the detection limit was about 1 × 10(-3) M. Chemical noises from PVP and other impurities were observed and attributed mainly to the competitive adsorption of PVP on the surfaces of Ag-NPs. After tetrahydrofuran washing of the PSA/Ag-NPs/PVP substrates that removed the PVP and other residuals, the signal/noise levels of SERS were greatly improved and the detection limit of melamine was determined to be 1 × 10(-7) M. This result indicated that the new PSA/Ag-NPs system is highly effective and can be used as the SERS-active substrate for trace analysis of a variety of drugs and food additives
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Acrylates
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|a Polystyrenes
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|a Solutions
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|a Triazines
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|a poly(styrene-b-acrylic acid)
|2 NLM
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|a Silver
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|a 3M4G523W1G
|2 NLM
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|a melamine
|2 NLM
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|a N3GP2YSD88
|2 NLM
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| 700 |
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|a Ma, Wan-Fu
|e verfasserin
|4 aut
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|a Wei, Chuan
|e verfasserin
|4 aut
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|a You, Li-Jun
|e verfasserin
|4 aut
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|a Guo, Jia
|e verfasserin
|4 aut
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|a Hu, Jun
|e verfasserin
|4 aut
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|a Wang, Chang-Chun
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 27(2011), 23 vom: 06. Dez., Seite 14539-44
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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|g volume:27
|g year:2011
|g number:23
|g day:06
|g month:12
|g pages:14539-44
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|u http://dx.doi.org/10.1021/la203049k
|3 Volltext
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