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Traveling Hot Spots in Plasmonic Photocatalysis: Manipulating Interparticle Spacing for Real‐Time Control of Electron Injection
ChemCatChem ( IF 4.5 ) Pub Date : 2018-02-27 , DOI: 10.1002/cctc.201702053
Yoel Negrín-Montecelo 1 , Miguel Comesaña-Hermo 1 , Xiang-Tian Kong 2 , Benito Rodríguez-González 1 , Zhiming Wang 3 , Moisés Pérez-Lorenzo 1 , Alexander O. Govorov 2 , Miguel A. Correa-Duarte 1
Affiliation  

Herein, we introduce a novel approach to achieve real‐time control over the hot‐electron injection process in metal–semiconductor photocatalysts. Such functionality is attained through the design of a hybrid nanocomposite in which plasmonic Au nanorods and TiO2 nanoparticles are synergistically integrated with a thermoresponsive polymer. In this manner, modifying the temperature of the system allows 1) precise regulation of the interparticle distance between the catalyst and the plasmonic component and 2) the reversible formation of plasmonic hot spots on the semiconductor. Both features can be simultaneously exploited to modulate the injection of hot electrons, thus boosting/inhibiting at will the photocatalytic activity of these heterostructures. This innovative conception enables dynamically adjustable performance of semiconductors, hence opening the door to the development of a new generation of plasmon‐operated photocatalytic devices.

中文翻译:

在等离子光催化中移动热点:操纵粒子间的间距,以实时控制电子注入。

在这里,我们介绍一种新颖的方法来实现金属半导体光催化剂中热电子注入过程的实时控制。这种功能是通过设计一种杂化纳米复合材料来实现的,在该杂化纳米复合材料中,等离子体Au纳米棒和TiO 2纳米颗粒与热响应性聚合物协同整合。以这种方式,改变系统的温度允许1)精确调节催化剂和等离子体组分之间的粒子间距离,以及2)在半导体上可逆地形成等离子体热点。可以同时利用这两个功能来调节热电子的注入,从而随意增强/抑制这些异质结构的光催化活性。这种创新的概念可动态调节半导体的性能,从而为新一代等离激元操作的光催化设备的开发打开了大门。
更新日期:2018-02-27
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