High surface enhanced Raman scattering activity of BN nanosheets–Ag nanoparticles hybrids
High surface enhanced Raman scattering activity of BN nanosheets–Ag nanoparticles hybrids
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DOI：
10.1016/j.jallcom.2013.08.178
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发表时间：
2014-01
影响因子：
6.2
通讯作者：
Shanshan Yang;Zhaochun Zhang;Jun Zhao;Houli Zheng
中科院分区：
文献类型：
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作者：
Shanshan Yang;Zhaochun Zhang;Jun Zhao;Houli Zheng
开发了一种简便的液相还原路线，用银纳米粒子（AgNP）修饰氮化硼（BN）纳米片，以制造具有高表面增强拉曼散射（SERS）活性的BN-AgNPs杂化物。通过透射电子显微镜和原子力显微镜对BN-AgNPs纳米杂化物的层状结构和形貌进行了表征，同时利用傅里叶变换红外光谱和紫外-可见光研究了光学性能和应用于光学传感器的表面等离子体共振。对吸附的 2-巯基苯并咪唑 (MBI) 分子的 SERS 进行了研究，结果表明 BN-AgNPs 基底表现出非常强的 SERS 活性，在分子探针传感器中提供了巨大的潜在应用。根据SERS和拉曼表面选择规则的分析，我们可以得出结论：MBI分子通过硫和氮原子垂直吸附在AgNPs表面上。更重要的是，循环伏安实验表明BN-AgNPs纳米杂化物在KCl溶液中具有电化学不可逆行为。
A facile liquid-phase reducing route was developed to modify boron nitride (BN) nanosheets with silver nanoparticles (AgNPs) in order to fabricate BN–AgNPs hybrids with high surface enhanced Raman scattering (SERS) activity. The layered structure and morphology of BN–AgNPs nanohybrids were characterized by transmission electron microscopy and atomic force microscopy, meanwhile, Fourier transform infrared spectroscopy and ultraviolet–visible were used for studying optical properties and surface plasmon resonance applied to the optical sensor. The SERS of adsorbed 2-mercaptobenzimidazole (MBI) molecule was investigated which shown that the BN–AgNPs substrate exhibited a very strong SERS activity, offering a great potential application in molecular probe sensor. On the basis of the analysis of SERS and the Raman surface selection rules, we could draw a conclusion that the MBI molecule was adsorbed upright on the AgNPs surface through the sulphur and nitrogen atoms. What is more, the cyclic voltammetry experiment indicated the electrochemically irreversible behavior of BN–AgNPs nanohybrids in KCl solution.