Zhang, Wenyu and DeIonno, Erica and Dichtel, William R. and Fang, Lei and Trabolsi, Ali and Olsen, John-Carl and Benítez, Diego and Heath, James R. and Stoddart, J. Fraser (2011) A solid-state switch containing an electrochemically switchable bistable poly[n]rotaxane. Journal of Materials Chemistry, 21 (5). pp. 1487-1495. ISSN 0959-9428 http://resolver.caltech.edu/CaltechAUTHORS:20110223-104207586
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Electrochemically switchable bistable main-chain poly[n]rotaxanes have been synthesised using a threading-followed-by-stoppering approach and were incorporated into solid-state, molecular switch tunnel junction devices. In contrast to single-station poly[n]rotaxanes of similar structure, the bistable polymers do not fold into compact conformations held together by donor–acceptor interactions between alternating stacked p-electron rich and p-electron deficient aromatic systems. Films of the poly[n]rotaxane were incorporated into the devices by spin-coating, and their thickness was easily controlled. The switching functionality was characterised both (1) in solution by cyclic voltammetry and (2) in devices containing either two metal electrodes or one metal and one silicon electrode. Devices with one silicon electrode displayed hysteretic responses with applied voltage, allowing the devices to be switched between two conductance states, whereas devices containing two metal electrodes did not exhibit switching behaviour. The electrochemically switchable bistable poly[n]rotaxanes offer significant advantages in synthetic efficiency and ease of device fabrication as compared to bistable small-molecule rotaxanes.
|Additional Information:||© 2011 The Royal Society of Chemistry. Received 14th July 2010, Accepted 3rd October 2010. This paper is part of a Journal of Materials Chemistry themed issue in celebration of the 70th birthday of Professor Fred Wudl. This work was supported under the Semiconductor Research Corporation (SRC) through its focus centers on Functional Engineered NanoArchitectonics (FENA) and Materials, Structures, and Devices (MSD), the MolApps Program funded by the Defence Advanced Research Projects Agency (DARPA), and The Aerospace Corporation’s Independent Research and Development Program. The authors gratefully acknowledge Brendan Foran of The Aerospace Corporation for the transmission electron microscopy.|
|Group:||Kavli Nanoscience Institute|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||25 Feb 2011 22:00|
|Last Modified:||26 Nov 2012 03:56|
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