Tunable photocycle kinetics of a hybrid bacteriorhodopsin/quantum dot system  

作　　者：Terianna J. Wax Jordan A. Greco Shutang Chen Nicole L. Wagner Jing Zhao Robert R. Birge 

机构地区：[1]55 North Eagleville Rd, Department of Chemistry, University of Connecticut, Storrs, CT, 06269-3060, USA

出　　处：《Nano Research》2019年第2期365-373,共9页纳米研究（英文版）

基　　金：the National Institutes of Health (GM-34548);the National Science Foundation (No. CAREER-1554800).

摘　　要：The inclusion of inorganic nanoparticles in biological environments has led to the creation of hybrid nanosystems that are employed in a variety of applications. One such system includes quantum dots (QDs) coupled with the photoactive protein, bacteriorhodopsin (BR), which has been explored in developing enhanced photovoltaic devices. In this work, we have discovered that the kinetics of the BR photocycle can be manipulated using CdSe/CdS (core/shell) QDs. The photocycle lifetime of protein samples with varying QD amounts were monitored using time-resolved absorption spectroscopy. Concentration-dependent elongations of the bR and M state lifetimes were observed in the kinetic traces, thus suggesting that excitonic coupling occurs between BR and QDs. We propose that the pairing of BR with QDs has the potential to be utilized in protein-based computing applications, specifically for real-time holographic processors, which depend on the temporal dynamics of the bR and M photointermediates.

关 键 词：BACTERIORHODOPSIN PHOTOCYCLE BIONANOTECHNOLOGY PHOTOCHROMISM quantum DOT HYBRID materials 

分 类 号：O4[理学—物理]