推荐主题
查看: 1871|回复: 0

近红外与中红外等离子体纳米晶薄膜的增强光吸收

[复制链接] qrcode

41

主题

42

帖子

223

积分

超级版主

Rank: 8Rank: 8

积分
223
发表于 2018-9-19 13:35:17 | 显示全部楼层 |阅读模式
Enhanced photodesorption from near- and mid-infrared plasmonic nanocrystal thin films
近红外与中红外等离子体纳米晶薄膜的增强光吸收
Journal of Vacuum Science & Technology A 36, 061401 (2018);

https://doi.org/10.1116/1.5046381

Weize Hu and Michael A. Fillera)
Hide Affiliations
School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332
a)Electronic mail: mfiller@gatech.edu

ABSTRACT
摘要

The authors show that the desorption rate of two model molecules, indole and benzoic acid, from thin films of indium tin oxide nanocrystals supporting near- and mid-infrared (0.33–0.48 eV) localized surface plasmon resonances (LSPRs) is enhanced by as much as 60% upon illumination with broadband infrared light. The desorption rate increases linearly with light intensity. No increase in the desorption rate is detected for undoped In2O3 nanocrystal thin films or when photons resonant with the LSPR are blocked. The authors study the desorption rate enhancement as a function of illumination intensity, LSPR energy, and isotopic substitution. Importantly, the authors demonstrate the accelerated desorption via in-coupling of light to LSPRs with energies well within the mid-infrared. Their work opens the door to using these low energy photons as choreographers of chemical processes and sets the stage for future mechanistic studies.

本文作者展示,在用宽带红外光照射下两种模型分子吲哚和苯甲酸的解吸率增强了60%,这两种分子取自支持近红外和中红外(0.33-0.48 eV)局域表面等离子体共振(LSPRs)的氧化铟锡纳米晶薄膜。解吸率随光强度线性增加。对于未掺杂的In2O3纳米晶体薄膜,或者当与LSPR共振的光子被阻挡时,未检测到解吸速率的增加。作者研究了解吸速率增强对光照强度,LSPR能量和同位素替代的依赖关系。重要的是,作者证明了通过将光耦合到LSPR的加速解吸,条件是能量在中红外线之内。他们的工作为使用这些低能光子来设计化学过程打开了大门,并为未来的机理研究创造了条件。

回复

使用道具 举报

您需要登录后才可以回帖 登录 | 立即注册

本版积分规则

快速回复 返回顶部 返回列表