Issue 37, 2012

Memory devices based on functionalized copolymers exhibiting a linear dependence of switch threshold voltage with the pendant nitro-azobenzene moiety content change

Abstract

A nonvolatile nanoscale memory device based on pendent copolymer exhibits write-once-read-many-times (WORM) characteristics with the highest ON/OFF current ratio up to 104 and a long retention time. Moreover, it was observed that switch threshold voltages of the device varied almost linearly with the functional moiety content in the copolymer. The cyclic voltammetry (CV) curves and UV-vis spectra of the copolymer's nanofilms were investigated and the obtained results associated with the linear decreasing memory behavior. The mechanisms of the device exhibiting WORM characteristics were elucidated from molecular simulation results showing that the electron density transition from the HOMO to LUMO surfaces is permanently under electric field and would not revert to the original state after the external voltage was removed.

Graphical abstract: Memory devices based on functionalized copolymers exhibiting a linear dependence of switch threshold voltage with the pendant nitro-azobenzene moiety content change

Article information

Article type
Paper
Submitted
28 May 2012
Accepted
13 Aug 2012
First published
13 Aug 2012

J. Mater. Chem., 2012,22, 19957-19963

Memory devices based on functionalized copolymers exhibiting a linear dependence of switch threshold voltage with the pendant nitro-azobenzene moiety content change

N. Fan, H. Liu, Q. Zhou, H. Zhuang, Y. Li, H. Li, Q. Xu, N. Li and J. Lu, J. Mater. Chem., 2012, 22, 19957 DOI: 10.1039/C2JM33426G

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