skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Electron tunnelling through single azurin molecules can be on/off switched by voltage pulses

Abstract

Redox metalloproteins are emerging as promising candidates for future bio-optoelectronic and nano-biomemory devices, and the control of their electron transfer properties through external signals is still a crucial task. Here, we show that a reversible on/off switching of the electron current tunnelling through a single protein can be achieved in azurin protein molecules adsorbed on gold surfaces, by applying appropriate voltage pulses through a scanning tunnelling microscope tip. The observed changes in the hybrid system tunnelling properties are discussed in terms of long-sustained charging of the protein milieu.

Authors:
 [1];  [2]; ; ;  [1]
  1. Biophysics and Nanoscience Centre, DEB-CNISM, Università della Tuscia, I-01100 Viterbo (Italy)
  2. (Italy)
Publication Date:
OSTI Identifier:
22399023
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 106; Journal Issue: 18; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CONTROL; ELECTRIC POTENTIAL; ELECTRON TRANSFER; ELECTRONS; GOLD; METALLOPROTEINS; MOLECULES; SCANNING TUNNELING MICROSCOPY; SURFACES; TUNNEL EFFECT

Citation Formats

Baldacchini, Chiara, Institute of Agro-Environmental and Forest Biology, CNR, I-05010 Porano, Kumar, Vivek, Bizzarri, Anna Rita, and Cannistraro, Salvatore, E-mail: cannistr@unitus.it. Electron tunnelling through single azurin molecules can be on/off switched by voltage pulses. United States: N. p., 2015. Web. doi:10.1063/1.4919911.
Baldacchini, Chiara, Institute of Agro-Environmental and Forest Biology, CNR, I-05010 Porano, Kumar, Vivek, Bizzarri, Anna Rita, & Cannistraro, Salvatore, E-mail: cannistr@unitus.it. Electron tunnelling through single azurin molecules can be on/off switched by voltage pulses. United States. doi:10.1063/1.4919911.
Baldacchini, Chiara, Institute of Agro-Environmental and Forest Biology, CNR, I-05010 Porano, Kumar, Vivek, Bizzarri, Anna Rita, and Cannistraro, Salvatore, E-mail: cannistr@unitus.it. Mon . "Electron tunnelling through single azurin molecules can be on/off switched by voltage pulses". United States. doi:10.1063/1.4919911.
@article{osti_22399023,
title = {Electron tunnelling through single azurin molecules can be on/off switched by voltage pulses},
author = {Baldacchini, Chiara and Institute of Agro-Environmental and Forest Biology, CNR, I-05010 Porano and Kumar, Vivek and Bizzarri, Anna Rita and Cannistraro, Salvatore, E-mail: cannistr@unitus.it},
abstractNote = {Redox metalloproteins are emerging as promising candidates for future bio-optoelectronic and nano-biomemory devices, and the control of their electron transfer properties through external signals is still a crucial task. Here, we show that a reversible on/off switching of the electron current tunnelling through a single protein can be achieved in azurin protein molecules adsorbed on gold surfaces, by applying appropriate voltage pulses through a scanning tunnelling microscope tip. The observed changes in the hybrid system tunnelling properties are discussed in terms of long-sustained charging of the protein milieu.},
doi = {10.1063/1.4919911},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 18,
volume = 106,
place = {United States},
year = {2015},
month = {5}
}