Jump to main content
Jump to site search

Issue 43, 2016
Previous Article Next Article

Controllable stationary photocurrents generated from a bacteriorhodopsin/upconversion nanoparticle-based bionanosystem under NIR illumination

Author affiliations

Abstract

In the past few decades, tremendous effort has been dedicated to develop bacteriorhodopsin (bR)-based photo-electronic devices for generating a stationary photocurrent and further for use as a component of artificial retinas in constant illumination sensing. However, an IR-triggered stationary photocurrent with controllable amplitudes has never been realized to date. Herein, NaYF4:Yb,Er and NaYF4:Yb,Tm upconversion nanoparticles (UCNPs) with green and blue emissions, respectively, were synthesized and further incorporated with bR to build a bionanosystem. Under 980 nm NIR irradiation the UCNPs function as internal green and blue light sources to initiate the photocycle and speed up the transition of bR from M410 to the ground state, consequently accelerating the bR photocycle for the generation of a stationary photocurrent. Moreover, the photocurrent profile could be tailored by changing the blue/green emission intensity ratio. The mechanism is analysed to explore the scientific insights. The system consisting of controllable blue and green light sources may not only hold great promise to construct new types of bR-based optical devices, but also offers a useful setup to investigate the fundamental science underlying the bR photoresponse.

Graphical abstract: Controllable stationary photocurrents generated from a bacteriorhodopsin/upconversion nanoparticle-based bionanosystem under NIR illumination

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 01 Sep 2016, accepted on 11 Oct 2016 and first published on 12 Oct 2016


Article type: Paper
DOI: 10.1039/C6NR06930D
Citation: Nanoscale, 2016,8, 18524-18530
  •   Request permissions

    Controllable stationary photocurrents generated from a bacteriorhodopsin/upconversion nanoparticle-based bionanosystem under NIR illumination

    Z. Lu, J. Wang, R. Li, Y. Qiao, M. Zhou and C. M. Li, Nanoscale, 2016, 8, 18524
    DOI: 10.1039/C6NR06930D

Search articles by author