State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2012 Sep;95:213-7. doi: 10.1016/j.saa.2012.04.101. Epub 2012 May 7.
TiO(2) and Mn-doped TiO(2) (1%, 3% and 5%) nanoparticles (NPs) were synthesized by a sol-hydrothermal method for surface-enhanced Raman spectroscopy study. When using the 4-mercaptobenzoic acid (4-MBA) as the probing molecule, optimum SERS signals were observed on the Mn-TiO(2) (3%) samples. On the 3% Mn doped TiO(2) substrate, 4-MBA molecules exhibit a higher SERS intensity by a factor of six as compared with the native enhancement of 4-MBA adsorbed on pure TiO(2) NPs. The possible mechanism for the phenomena is also discussed. This study opens up a new dimension for the family of SERS substrates.
采用溶胶-水热法合成了 TiO(2) 和 Mn 掺杂的 TiO(2)(1%、3%和 5%)纳米粒子(NPs)，用于表面增强拉曼光谱研究。当使用 4-巯基苯甲酸(4-MBA)作为探测分子时，在 Mn-TiO(2)(3%)样品上观察到最佳的 SERS 信号。在 3%Mn 掺杂的 TiO(2)衬底上，与纯 TiO(2) NPs 吸附的 4-MBA 的本征增强相比，4-MBA 分子表现出高 6 倍的 SERS 强度。还讨论了这种现象的可能机制。这项研究为 SERS 衬底家族开辟了一个新的维度。
