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Jaafar, AH, O'Neill, M 
ORCID: https://orcid.org/0000-0002-0232-5250, Kelly, SM, Verrelli, E and Kemp, NT,
2019.
Percolation threshold enables optical resistive‐memory switching and light‐tuneable synaptic learning in segregated nanocomposites.
Advanced Electronic Materials, 5 (7): 1900197.
ISSN 2199-160X
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Abstract
An optical memristor where the electrical resistance memory depends on the history of both the current flowing through the device and the irradiance of incident light onto it is demonstrated. It is based on a nanocomposite consisting of functionalized gold nanoparticles in an optically active azobenzene polymer matrix. The composite has an extremely low percolation threshold of 0.04% by volume for conductivity because of the aggregation of the conducting nanoparticles into filamentary nanochannels. Optical irradiation results in photomechanical switching through expansion of the thin film from above to below the percolation threshold, giving a large LOW/HIGH resistance ratio of 103. The device acts as an artificial synapse, the conductivity or plasticity of which can be independently modulated, either electrically or optically, to enable tunable and reconfigurable synaptic circuits for brain‐inspired artificial intelligent or visual memory arrays. The lifetime of the resistive‐memory states is also optically controllable, which enables spatial modulation of long‐ and short‐term memory.
| Item Type: | Journal article |
|---|---|
| Publication Title: | Advanced Electronic Materials |
| Creators: | Jaafar, A.H., O'Neill, M., Kelly, S.M., Verrelli, E. and Kemp, N.T. |
| Publisher: | Wiley‐VCH Verlag |
| Date: | July 2019 |
| Volume: | 5 |
| Number: | 7 |
| ISSN: | 2199-160X |
| Identifiers: | Number Type 10.1002/aelm.201900197 DOI |
| Divisions: | Schools > School of Science and Technology |
| Record created by: | Linda Sullivan |
| Date Added: | 08 Aug 2019 08:05 |
| Last Modified: | 27 Sep 2019 15:20 |
| URI: | https://irep.ntu.ac.uk/id/eprint/37189 |
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