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Issue 10, 2018
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Design rules for carbazole derivatized n-alkyl methacrylate polymeric memristors

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Abstract

The alternating current (AC) and direct current (DC) electrical response of a number of n-alkyl methacrylate polymers with a charge transporting pendant carbazole ring were studied. The electrical properties of the polymers were studied as a function of the n-alkyl length with n ranging from 2 to 11. The DC current (I)–voltage (V) response of the polymers was characterized by an erratic and bistable response, while their AC IV response was a pinched hysteresis loop when measured between 1–100 Hz. For polymers with n < 9, their pinched hysteresis loop was characterized by “jump transitions” indicative of bistability, while polymers with n ≥ 9 had a pinched hysteresis loop that was smooth in appearance. Dielectric spectroscopy on the polymers indicated that as the n-alkyl length is increased, the rotation flexibility of the carbazole moiety is enhanced. The n-alkyl methacrylate polymers with a pendant carbazole ring spaced n ≥ 9 exhibited a lower activation energy and temperature for the onset of ring motion and resulted in polymer-based memristors that exhibited electrical characteristics, such as incrementally adjustable conductivity and are potential candidates for mimicking synaptic plasticity.

Graphical abstract: Design rules for carbazole derivatized n-alkyl methacrylate polymeric memristors

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Article information


Submitted
02 Nov 2017
Accepted
28 Jan 2018
First published
02 Feb 2018

J. Mater. Chem. C, 2018,6, 2533-2545
Article type
Paper

Design rules for carbazole derivatized n-alkyl methacrylate polymeric memristors

T. M. McFarlane, B. Zdyrko, Y. Bandera, D. Worley, O. Klep, M. Jurča, C. Tonkin, S. H. Foulger, J. Vilčáková, P. Sáha and J. Pfleger, J. Mater. Chem. C, 2018, 6, 2533
DOI: 10.1039/C7TC05001A

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