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Electrical charging of Au nanoparticles embedded by streptavidin-biotin biomolecular binding in organic memory device

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6 Author(s)
Jung, Sung Mok ; Department of Chemical Engineering, Myongji University, Gyeonggi 449-728, Republic of Korea ; Kim, Hyung-Jun ; Kim, Bong-Jin ; Kim, Yong-Sang
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In this study, electrical charging phenomena in an organic memory structure using Au nanoparticles (NPs) conjugated with a specific binding mechanism were demonstrated. Monolayer of streptavidin-passivated Au NPs was incorporated on biotin-coated SiO2 in structure of metal-pentacene-insulator-silicon (MPIS) device. Clockwise and counter-clockwise capacitance-voltage (C-V) hysteresis loops were measured depending on the oxide thickness. For 30 nm, a clockwise C-V hysteresis having memory window of 0.68 V was obtained under (+/-)12 V sweep range, while a counter-clockwise C-V hysteresis having memory window of 6.47 V was obtained under (+/-)7 V sweep range for 10 nm thick oxide.

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Applied Physics Letters  (Volume:97 ,  Issue: 15 )