【摘要】 金属纳米结构的表面等离激元共振效应能够显著提高金属对光的吸收。表面等离激元效应在金属表面产生增强电场的同时,产生大量的热和高于费米能级的热电子。这些效应可以极大的提高表面化学反应速率,甚至提高选择性,实现传统方法难以实现的反应。本文回顾了表面等离激元辅助反应中各种效应(包括光电场、热和热电子)对反应的作用,总结了高效表面等离激元辅助反应的原则。等离激元增强拉曼光谱由于具有既能通过表面等离激元引发反应,又能通过光谱观测反应的特点,因此在表征等离激元辅助反应方面具有独特的优势。最后从原位表征、界面调控和多外场协同等方面提出了展望。更多还原

【Abstract】 The surface plasmon resonance effect of metal nanostructures is able to significantly improve the absorption of light for metals.Consequently,the electric field can be enhanced on the surface,as well as the generation of heat and hot electrons with an energy higher than Fermi level.All of these effects can increase the rate of surface chemical reactions,even improve the selectivity and realize some reactions that cannot be achieved with conventional ways.Here we review the roles of various effects(including electric field,heat,and hot electrons)in the process of surface plasmon assisted reactions,and summarize the principle to realize surface plasmon assisted reactions with a high efficiency.Plasmon-enhanced Raman spectroscopies are of advantageous in characterizing surface plasmon assisted reactions,since they can both initiate the reaction and monitor the process.Finally we conclude by discussing the future from the aspects of in-situ characterization,control of interface and synergistic modulation of multiple external fields.更多还原