Electrical bistability is demonstrated in a polymer memory device using polystyrene containing an organic conjugated compound (8-hydroxyquinoline) and gold nanoparticles (Au NPs) capped with different alkanethiols of carbon chain lengths as the active layer between two metal electrodes. Au NPs capped with three different alkanethiols [1-octanethiol (C8), 1-dodecanethiol (C12), and 1-octadecanethiol (C18)] are investigated for the correlation with the memory performance. Above a threshold voltage, the as-fabricated device can transit from low conductivity state to high conductivity state. By applying a certain positive voltage, the high conductivity state can return to the low conductivity state. The switch-on voltages of thiol-derivatized Au NPs based organic memory devices are almost the same. Current fluctuations appeared in the static current–voltage characteristic of Au NPs capped with a 1-octadecanethiol (C18) based memory device. This feature is related to quantized charging and discharging of Au NPs because of the Coulomb repulsion between electrons confined in nanocrystals.
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July 2008
54th International AVS Symposium
14-19 October 2007
Seattle, Washington (USA)
Research Article|
July 01 2008
Programmable memory devices using gold nanoparticles capped with alkanethiols of different carbon chain lengths
Pei Ying Lai;
Pei Ying Lai
Department of Materials Science and Engineering,
National Cheng Kung University
, Tainan, Taiwan
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J. S. Chen
J. S. Chen
a)
Department of Materials Science and Engineering,
National Cheng Kung University
, Tainan, Taiwan
Search for other works by this author on:
a)
Electronic mail: jenschen@mail.ncku.edu.tw
J. Vac. Sci. Technol. A 26, 1062–1067 (2008)
Article history
Received:
October 11 2007
Accepted:
December 27 2007
Citation
Pei Ying Lai, J. S. Chen; Programmable memory devices using gold nanoparticles capped with alkanethiols of different carbon chain lengths. J. Vac. Sci. Technol. A 1 July 2008; 26 (4): 1062–1067. https://doi.org/10.1116/1.2836426
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