使用镀银多孔微晶玻璃基板的表面增强拉曼光谱

Surface-enhanced Raman spectroscopy using silver-coated porous glass-ceramic substrates.

作者信息

Pan Z, Zavalin A, Ueda A, Guo M, Groza M, Burger A, Mu R, Morgan S H

机构信息

Department of Physics, Fisk University, Nashville, Tennessee 37208, USA.

出版信息

Appl Spectrosc. 2005 Jun;59(6):782-6. doi: 10.1366/0003702054280658.

DOI:10.1366/0003702054280658

PMID:16053545

Abstract

Surface-enhanced Raman scattering (SERS) has been studied using a silver-coated porous glass-ceramic material as a new type of substrate. The porous glass-ceramic is in the CaO-TiO2-P2O5 system prepared by controlled crystallization and subsequent chemical leaching of the dense glass-ceramic, leaving a solid skeleton with pores ranging in size from 50 nm to submicrometer. Silver was coated on the surface of the porous glass-ceramic by radio frequency (RF) sputtering or e-beam evaporation in vacuum. SERS spectra of excellent quality were obtained from several dyes and carboxylic acid molecules, including rhodamine 6G, crystal violet, isonicotinic acid, and benzoic acid, using this new substrate. This new substrate showed a good compatibility with these molecules. The porous glass ceramic with a nanometer-structured surface accommodated both test molecules and silver film. The absorbed molecules were therefore better interfaced with silver for surface-enhanced Raman scattering.

摘要

利用一种镀银的多孔微晶玻璃材料作为新型基底，对表面增强拉曼散射（SERS）进行了研究。该多孔微晶玻璃属于CaO-TiO₂-P₂O₅体系，通过对致密微晶玻璃进行控制晶化和后续化学浸蚀制备而成，留下尺寸范围从50纳米到亚微米的带有孔隙的固体骨架。通过射频（RF）溅射或真空电子束蒸发将银镀覆在多孔微晶玻璃表面。使用这种新型基底，从若丹明6G、结晶紫、异烟酸和苯甲酸等几种染料和羧酸分子中获得了高质量的SERS光谱。这种新型基底与这些分子表现出良好的相容性。具有纳米结构表面的多孔微晶玻璃容纳了测试分子和银膜。因此，被吸收的分子与银的界面更好，有利于表面增强拉曼散射。