光谱学与光谱分析 |
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Study on Adsorption of Nonpolar R-Side Amino Acids on Silver Nanoparticles by FT-SERS |
LI Si, ZHOU Guang-ming*,YANG Da-cheng, YU Dan-ni, PENG Hong-jun, WU Xin-jun, WANG Ning |
Southwest University,School of Chemistry and Chemical Engineering,Chongqing 400715, China |
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Abstract The adsorption orientation and adsorption characteristics of aliphatic-nonpolar amino acids represented by L-methionine on silver nanoparticles were studied by FT-surface-enhanced Raman spectroscopy (FT-SERS) method with different pH and concentrations. According to the experiments,in order to get the best FT-SERS effects,the optimal concentration range of the L-methionine on silver sol is between 10-3 mol·L-1-10-4 mol·L-1. The FT-SERS effects and adsorption model change with pH;The SERS are poor when pH is near the isoelectric point or over 11 or 3. The interaction of L-methionine with Ag nanoparticles is the physical and chemical adsorption by NH3,COO-,S,which could also be effected by pH. From the results and previous reports on this aspect, the general rules of the adsorption model and the orientation of the aliphatic-nonpolar amino acids on silver nanoparticles were speculated, which would be useful for the study of amino acids, protein, peptide, enzyme etc.
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Received: 2006-02-06
Accepted: 2006-05-18
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Corresponding Authors:
ZHOU Guang-ming
E-mail: gmzhou@swu.edu.cn
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Cite this article: |
LI Si,ZHOU Guang-ming,YANG Da-cheng, et al. Study on Adsorption of Nonpolar R-Side Amino Acids on Silver Nanoparticles by FT-SERS[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(04): 711-715.
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https://www.gpxygpfx.com/EN/Y2007/V27/I04/711 |
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