title: Charging effect in Au nanoparticle memory device with biomolecule binding mechanism.
abstract: Organic memory device having gold nanoparticle (Au NPs) has been introduced in the structure of metal-pentacene-insulator-silicon (MPIS) capacitor device, where the Au NPs layer was formed by a new bonding method. Biomolecule binding mechanism between streptavidin and biotin was used as a strong binding method for the formation of monolayered Au NPs on polymeric dielectric of poly vinyl alcohol (PVA). The self-assembled Au NPs was functioned to show storages of charge in the MPIS device. The binding by streptavidin and biotin was confirmed by AFM and UV-VIS. The UV-VIS absorption of the Au NPs was varied at 515 nm and 525 nm depending on the coating of streptavidin. The AFM image showed no formation of multi-stacked layers of the streptavidin-capped Au NPs on biotin-NHS layer. Capacitance-voltage (C-V) performance of the memory device was measured to investigate the charging effect from Au NPs. In addition, charge retention by the Au NPs storage was tested to show 10,000 s in the C-V curve.
authors: Department of Chemical Enginnering, Myungji University, Gyeonggi Yongin 449-728, Korea.
authors: Sung Mok
authors: SM
authors: Jung
authors: Hyung-Jun
authors: HJ
authors: Kim
authors: Bong-Jin
authors: BJ
authors: Kim
authors: Tae-Sik
authors: TS
authors: Yoon
authors: Yong-Sang
authors: YS
authors: Kim
authors: Hyun Ho
authors: HH
authors: Lee
mesh_terms: D015374:Biosensing Techniques; D001710:Biotin / Q000737:chemistry / Q000378:metabolism; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D011142:Polyvinyl Alcohol / Q000737:chemistry; D011485:Protein Binding; D019809:Streptavidin / Q000737:chemistry / Q000378:metabolism
chemical_list: D001710:Biotin; D006046:Gold; D011142:Polyvinyl Alcohol; D019809:Streptavidin