Silver-coated zeolite crystal films as surface-enhanced Raman scattering substrates

被引：22
|
作者：
Yan, WF [1 ]
Bao, LL [1 ]
Mahurin, SM [1 ]
Dai, S [1 ]
机构：
[1] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA
来源：
APPLIED SPECTROSCOPY | 2004年 / 58卷 / 01期
关键词：
surface-enhanced Raman scattering; SERS; zeolites; films; nanocrystals;
D O I：
10.1366/000370204322729423
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
Silver-coated zeolite A and zeolite NaX crystal films prepared by vacuum deposition were investigated as surface-enhanced Raman scattering (SERS) substrates. The substrates were active for the enhancement of Raman scattering from uranyl ions. A detection limit of 10(-5) M for uranyl was obtained using silver-coated zeolite A films. One advantage of these zeolite-based substrates is that the negatively charged microporous framework provides the selectivity for adsorption based on static electric charges. The SERS effects of positively charged uranyl ions and neutrally charged benzoic acid were compared. For the zeolite A substrate, there was a 100-times-greater sensitivity.
引用
收藏
页码：18 / 25
页数：8
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