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Title: Covalent assembly of gold nanoparticles for nonvolatile memory applications
Authors: Gupta, R.K.
Kusuma, D.Y.
Lee, P.S.
Srinivasan, M.P. 
Keywords: covalent assembly
gold nanoparticles
nonvolatile memory
Issue Date: 28-Dec-2011
Citation: Gupta, R.K., Kusuma, D.Y., Lee, P.S., Srinivasan, M.P. (2011-12-28). Covalent assembly of gold nanoparticles for nonvolatile memory applications. ACS Applied Materials and Interfaces 3 (12) : 4619-4625. ScholarBank@NUS Repository.
Abstract: This work reports a versatile approach for enhancing the stability of nonvolatile memory devices through covalent assembly of functionalized gold nanoparticles. 11-mercapto-1-undecanol functionalized gold nanoparticles (AuNPs) with a narrow size distribution and particle size of about 5 nm were synthesized. Then, the AuNPs were immobilized on a SiO 2 substrate using a functionalized polymer as a surface modifier. Microscopic and spectroscopic techniques were used to characterize the AuNPs and their morphology before and after immobilization. Finally, a metal-insulator- semiconductor (MIS) type memory device with such covalently anchored AuNPs as a charge trapping layer was fabricated. The MIS structure showed well-defined counterclockwise C-V hysteresis curves indicating a good memory effect. The flat band voltage shift was 1.64 V at a swapping voltage between ±7 V. Furthermore, the MIS structure showed a good retention characteristic up to 20 000 s. The present synthetic route to covalently immobilize gold nanoparticles system will be a step towards realization for the nanoparticle-based electronic devices and related applications. © 2011 American Chemical Society.
Source Title: ACS Applied Materials and Interfaces
ISSN: 19448244
DOI: 10.1021/am201022v
Appears in Collections:Staff Publications

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