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Research

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Publication details for Professor Michael Petty

Mabrook, MF, Pearson, C, Kolb, D, Zeze, DA & Petty, MC (2008). Memory effects in hybrid silicon-metallic nanoparticle-organic thin film structures. Organic Electronics 9(5): 816-820.
  • Publication type: Journal Article
  • ISSN/ISBN: 1566-1199

Author(s) from Durham

Abstract

We report on the electrical behaviour of metal-insulator-semiconductor
(MIS) structures fabricated on silicon substrates and using organic
thin films as the dielectric layers. These insulating thin films were
produced by different methods, including spin-coating
(polymethylmethacrylate), thermal evaporation (pentacene) and
Langmuir-Blodgett deposition (cadmium arachidate). Gold nanoparticles,
deposited at room temperature by chemical self-assembly, were used as
charge storage elements. In all cases, the MIS devices containing the
nanoparticles exhibited hysteresis in their capacitance versus voltage
characteristics, with a memory window depending on the range of the
voltage sweep. This hysteresis was attributed to the charging and
discharging of the nanoparticles from the gate electrode. A maximum
memory window of 2.5 V was achieved by scanning the applied voltage of
an Al/pentacene/Au nanoparticle/SiO2/P-Si structure between 9 and -9 V.
(C) 2008 Elsevier B.V. All rights reserved.