Kim Yoonhee, Cha Seungsang, Kim Jae-Ho, Oh Jeong-Wook, Nam Jwa-Min
Department of Chemistry, Seoul National University, Seoul 151-747, South Korea.
Nanoscale. 2021 Jun 3;13(21):9541-9552. doi: 10.1039/d1nr01055g.
Plasmonic electrochromism, the dependence of the colour of plasmonic materials on the applied electrical potential, has been under the spotlight recently as a key element for the development of optoelectronic devices and spectroscopic tools. In this review, we focus on the electrochromic behaviour and underlying mechanistic principles of plasmonic metal nanoparticles, whose localised surface plasmon resonance occurs in the visible part of the electromagnetic spectrum, and present a comprehensive review on the recent progress in understanding and controlling plasmonic electrochromism. The mechanisms underlying the electrochromism of plasmonic metal nanoparticles could be divided into four categories, based on the origin of the LSPR shift: (1) capacitive charging model accompanying variation in the Fermi level, (2) faradaic reactions, (3) non-faradaic reactions, and (4) electrochemically active functional molecule-mediated mechanism. We also review recent attempts to synchronise the simulation with the experimental results and the strategies to overcome the intrinsically diminutive LSPR change of the plasmonic metal nanoparticles. A better understanding and controllability of plasmonic electrochromism provides new insights into and means of the connection between photoelectrochemistry and plasmonics as well as future directions for producing advanced optoelectronic materials and devices.
等离子体电致变色，即等离子体材料的颜色随外加电势的变化而变化，作为光电器件和光谱工具发展的关键要素，近年来备受关注。在本综述中，我们聚焦于等离子体金属纳米颗粒的电致变色行为及其潜在的机理原理，这些纳米颗粒的局域表面等离子体共振发生在电磁光谱的可见光部分，并对理解和控制等离子体电致变色的最新进展进行全面综述。基于局域表面等离子体共振（LSPR）位移的起源，等离子体金属纳米颗粒电致变色的机理可分为四类：（1）伴随费米能级变化的电容充电模型；（2）法拉第反应；（3）非法拉第反应；（4）电化学活性功能分子介导的机制。我们还综述了近期将模拟与实验结果同步的尝试以及克服等离子体金属纳米颗粒固有微小LSPR变化的策略。对等离子体电致变色有更好的理解和可控性，为光电化学与等离子体学之间的联系提供了新的见解和方法，也为生产先进的光电子材料和器件指明了未来方向。
