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Computing with carbon nanotubes: optimization of threshold logic gates using disordered nanotube/polymer composites

Massey, M.K.; Kotsialos, A.; Qaiser, F.; Zeze, D.A.; Pearson, C.; Volpati, D.; Bowen, L.; Petty, M.C.

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Authors

M.K. Massey

A. Kotsialos

F. Qaiser

C. Pearson

D. Volpati

Leon Bowen leon.bowen@durham.ac.uk
Senior Manager (Electron Microscopy)

M.C. Petty



Abstract

This paper explores the use of single-walled carbon nanotube (SWCNT)/poly(butyl methacrylate) composites as a material for use in unconventional computing. The mechanical and electrical properties of the materials are investigated. The resulting data reveal a correlation between the SWCNT concentration/viscosity/conductivity and the computational capability of the composite. The viscosity increases significantly with the addition of SWCNTs to the polymer, mechanically reinforcing the host material and changing the electrical properties of the composite. The electrical conduction is found to depend strongly on the nanotube concentration; Poole-Frenkel conduction appears to dominate the conductivity at very low concentrations (0.11% by weight). The viscosity and conductivity both show a threshold point around 1% SWCNT concentration; this value is shown to be related to the computational performance of the material. A simple optimization of threshold logic gates shows that satisfactory computation is only achieved above a SWCNT concentration of 1%. In addition, there is some evidence that further above this threshold the computational efficiency begins to decrease.

Citation

Massey, M., Kotsialos, A., Qaiser, F., Zeze, D., Pearson, C., Volpati, D., …Petty, M. (2015). Computing with carbon nanotubes: optimization of threshold logic gates using disordered nanotube/polymer composites. Journal of Applied Physics, 117(13), Article 134903. https://doi.org/10.1063/1.4915343

Journal Article Type Article
Acceptance Date Mar 7, 2015
Online Publication Date Apr 7, 2015
Publication Date Apr 7, 2015
Deposit Date Apr 17, 2015
Publicly Available Date Mar 29, 2024
Journal Journal of Applied Physics
Print ISSN 0021-8979
Electronic ISSN 1089-7550
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 117
Issue 13
Article Number 134903
DOI https://doi.org/10.1063/1.4915343

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Copyright Statement
© 2015 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Applied Physics 117, 134903 (2015) and may be found at http://dx.doi.org/10.1063/1.4915343.





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