Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/51068
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dc.titleVolatile electrical switching in a functional polyimide containing electron-donor and -acceptor moieties
dc.contributor.authorLiu, Y.-L.
dc.contributor.authorLing, Q.-D.
dc.contributor.authorKang, E.-T.
dc.contributor.authorNeoh, K.-G.
dc.contributor.authorLiaw, D.-J.
dc.contributor.authorWang, K.-L.
dc.contributor.authorLiou, W.-T.
dc.contributor.authorZhu, C.-X.
dc.contributor.authorChan, D.S.-H.
dc.date.accessioned2014-04-24T07:25:36Z
dc.date.available2014-04-24T07:25:36Z
dc.date.issued2009
dc.identifier.citationLiu, Y.-L., Ling, Q.-D., Kang, E.-T., Neoh, K.-G., Liaw, D.-J., Wang, K.-L., Liou, W.-T., Zhu, C.-X., Chan, D.S.-H. (2009). Volatile electrical switching in a functional polyimide containing electron-donor and -acceptor moieties. Journal of Applied Physics 105 (4) : -. ScholarBank@NUS Repository.
dc.identifier.issn00218979
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/51068
dc.description.abstractA solution-processable functional polyimide (PYTPA-PI), containing triphenylamine-substituted diphenylpyridine moieties (PYTPA, electron donors) and phthalimide moieties (PI, electron acceptors), was synthesized. The copolymer exhibits a high glass transition temperature of 342 °C. A switching device, based on a solution-cast thin film of PYTPA-PI sandwiched between an indium-tin oxide (ITO) bottom electrode and an Al top electrode, exhibits two accessible conductivity states and can be switched from the low-conductivity (OFF) state to the high-conductivity (ON) state, with an ON/OFF current ratio of more than 103, at the threshold voltage of about 2.7 V. The ON state is volatile and relaxes readily to the OFF state. However, it can be electrically sustained by a refreshing voltage pulse of 2 V. The ON state can also be reset to the initial OFF state by a reverse bias of -0.9 V. The ability to write, erase, read, and refresh the electrical states fulfills the functionality of a dynamic random access memory. The electronic transitions and transport mechanisms associated with the memory effect were elucidated from molecular simulation. In comparison with that of other functional polyimides, the electrical switching performance in PYTPA-PI illustrates the possibility of tuning memory properties in imide polymers via molecular design and synthesis. © 2009 American Institute of Physics.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1063/1.3077286
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentELECTRICAL & COMPUTER ENGINEERING
dc.contributor.departmentCHEMICAL & BIOMOLECULAR ENGINEERING
dc.description.sourcetitleJournal of Applied Physics
dc.description.volume105
dc.description.issue4
dc.description.page-
dc.description.codenJAPIA
dc.identifier.isiut000263803300080
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