Yan Wenfu, Bao Lili, Mahurin Shannon M, Dai Sheng
Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
Appl Spectrosc. 2004 Jan;58(1):18-25. doi: 10.1366/000370204322729423.
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.
通过真空沉积制备的镀银A型沸石和NaX型沸石晶体薄膜作为表面增强拉曼散射（SERS）基底进行了研究。这些基底对铀酰离子的拉曼散射增强具有活性。使用镀银A型沸石薄膜获得了铀酰的检测限为10^(-5) M。这些基于沸石的基底的一个优点是带负电荷的微孔骨架基于静电荷提供吸附选择性。比较了带正电荷的铀酰离子和中性电荷的苯甲酸的SERS效应。对于A型沸石基底，灵敏度提高了100倍。
