Inner Filter Effect on Surface Enhanced Raman Spectroscopic Measurement

被引：18
作者：
Ameer, Fathima S. [1 ]
Ansar, Siyam M. [1 ]
Hu, Wenfang [2 ]
Zou, Shengli [2 ]
Zhang, Dongmao [1 ]
机构：
[1] Mississippi State Univ, Dept Chem, Mississippi State, MS 39762 USA
[2] Univ Cent Florida, Dept Chem, Orlando, FL 32816 USA
来源：
ANALYTICAL CHEMISTRY | 2012年 / 84卷 / 20期
基金：
美国国家科学基金会;
关键词：
SCATTERING; SILVER; NANOPARTICLES; MOLECULE; SERS;
D O I：
10.1021/ac302073f
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Presented herein is a combined experimental and computational study of the gold nanopartide (AuNP) inner filter effect on surface enhanced Raman spectroscopic (SERS) measurements. Using a bianalyte strategy in which dithiopurine (DTP) and ethanol were employed as the model analytes, we demonstrated that AuNPs enhance DTP's Raman signal but attenuate ethanol's Raman intensity. Combined time-resolved UV-vis and Raman measurements showed that AuNP aggregation has significant and an exactly opposite impact on the AuNP inner filter effect and SERS enhancement. This research provides critical new insights regarding SEAS signal variation and offers a simple methodology for reliable determination of the SERS enhancement factors.
引用
收藏
页码：8437 / 8441
页数：5
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