Todorov Rosen, Hristova-Vasileva Temenuga
Institute of Optical Materials and Technologies "Acad. J. Malinowski", Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 109, 1113 Sofia, Bulgaria.
Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria.
ACS Omega. 2025 May 7;10(19):19243-19255. doi: 10.1021/acsomega.5c01439. eCollection 2025 May 20.
This mini-review presents recent trends in the field of surface-enhanced spectroscopies, which are increasingly gaining ground for biomolecule detection. The paper discusses the role of electromagnetic and chemical bonding mechanisms for an explanation of Raman scattering and fluorescence enhancement. The charge transfer (CT) effect, which is involved in the chemical mechanism, plays an important role in changing the polarizability and is decisive in enhancing certain Raman scattering bands and fluorescence emission. The CT effect is determined by the band structure and the energy of the excitation radiation by which photoelectrons and holes with different energies are generated. Here we analyze the changes in the band structure of silver by adding p-block metals as well as the possibility to control CT and to enhance specific Raman bands through their engineering.
本综述介绍了表面增强光谱学领域的最新趋势，该技术在生物分子检测方面越来越受到关注。本文讨论了电磁和化学键合机制在解释拉曼散射和荧光增强方面的作用。电荷转移（CT）效应参与了化学机制，在改变极化率方面起着重要作用，并且对某些拉曼散射带和荧光发射的增强起决定性作用。CT效应由能带结构和激发辐射的能量决定，激发辐射会产生具有不同能量的光电子和空穴。在这里，我们分析了通过添加p区金属来改变银的能带结构的变化，以及通过工程手段控制CT和增强特定拉曼带的可能性。
