Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance upgrade on Thursday 4th of May 2017 from 8.00am to 9.00am (BST).

During this time our websites will be offline temporarily. If you have any questions please use the feedback button on this page. We apologise for any inconvenience this might cause and thank you for your patience.

An optically-gated AuNP–DNA protonic transistor

Author affiliations


Bio-interface transistors, which manipulate the transportation of ions (i.e. protons), play an important role in bridging physical devices with biological functionalities, because electrical signals are carried by ions/protons in biological systems. All available ionic transistors use electrostatic gates to tune the ionic carrier density, which requires complicated interconnect wires. In contrast, an optical gate, which offers the advantages of remote control as well as multiple light wavelength selections, has never been explored for ionic devices. Here, we demonstrate a light-gated protonic transistor fabricated from an Au nanoparticle and DNA (AuNP–DNA) hybrid membrane. The device can be turned on and off completely by using light, with a high on/off current ratio of up to 2 orders of magnitude. Moreover, the device only responds to specific light wavelengths due to the plasmonic effect from the AuNPs, which enables the capability of wavelength selectivity. Our results open up new avenues for exploring remotely controlled ionic circuits, in vivo protonic switches, and other biomedical applications.

Graphical abstract: An optically-gated AuNP–DNA protonic transistor

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 16 Nov 2016, accepted on 10 Apr 2017 and first published on 12 Apr 2017

Article type: Communication
DOI: 10.1039/C6NR08944E
Citation: Nanoscale, 2017, Advance Article
  •   Request permissions

    An optically-gated AuNP–DNA protonic transistor

    S. Peng, A. Lal, D. Luo and Y. Lu, Nanoscale, 2017, Advance Article , DOI: 10.1039/C6NR08944E

Search articles by author