文献类型：期刊文献

英文题名：Multi-color Reversible Photochromisms via Tunable Light-Dependent Responses

作者：Smith, Andrew T.[1,2];Ding, Hao[1,2];Gorski, Alicia[1];Zhang, Monica[1];Gitman, Philip A.[1];Park, Chanhyun[1];Hao, Zirui[1];Jiang, Yejia[3];Williams, Brandon L.[1,2];Zeng, Songshan[1,2];Kokkula, Akhil[1];Yu, Qingkai[4];Ding, Guqiao[5];Zeng, Huidan[3];Sun, Luyi[1,2,6]

机构：[1]Univ Connecticut, Dept Chem & Biomol Engn, Storrs, CT 06269 USA;[2]Univ Connecticut, Inst Mat Sci, Polymer Program, Storrs, CT 06269 USA;[3]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[4]Texas State Univ, Ingram Sch Engn, San Marcos, TX 78666 USA;[5]Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China;[6]Univ Connecticut, Dept Biomed Engn, Storrs, CT 06269 USA

年份：2020

卷号：2

期号：3

起止页码：680

外文期刊名：MATTER

收录：;EI(收录号：20212210429894);WOS:【SCI-EXPANDED(收录号:WOS:000519852700014)】；

基金：The authors acknowledge the free PVA samples provided by Kuraray. A.T.S. acknowledges the GAANN Fellowship (no. P200A150330).

语种：英文

外文关键词：Photochromism - Semiconductor devices - Color - Graphene - Cryptography - Magnetic semiconductors

摘要：Reversible multi-color chromic systems are critical for the development of advanced sensors, encryption devices, and rewritable media. While many systems show chromic responses to applied stimuli, few show distinct multi-colored states within the same system and exhibit limited flexibility in manipulation of the stimuli source. Light-responsive materials have shown promise because of high precision and controllable parameters of the incident light but suffer from slow kinetics limiting the versatility of the photochromic systems. Here, we report a highly active oxygen vacant titanium oxide/reduced graphene oxide photocatalyst that significantly accelerates the color switching of commercial redox dyes. With the improved catalyst, four photochromic devices are realized: (1) multi-wavelength photochromism, (2) intensity-dependent photochromism, (3) time-dependent photochromism, and (4) dual-response hydro-/photochromism. These devices are based on manipulating the interactions between the light and semiconductor and exhibit a broad range of photochromic behaviors with multi-color states and high reversibility.