Electrical study of polyelectrolyte self-assembled films using mercury probe

NABOK, A. V., HASSAN, A. K., RAY, A. K. and TOLDI, G. N. (2002). Electrical study of polyelectrolyte self-assembled films using mercury probe. Materials Science and Engineering C, 22 (2), 387-391.

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Link to published version:: 10.1016/S0928-4931(02)00203-5

Abstract

A non-destructive technique of a mercury probe was employed for studying electrical characteristics of polyelectrolyte self-assembled films. A series of I-V and C-V tests were performed on polyallylamine/polysterenesulfonate (PAA/PSS) multilayers deposited onto silicon wafers. C-V characteristics of the structure p-Si/(PAA/PSS)/Hg did not show any polarisation behaviour related to either ion movement or dipole orientation. The observed hysteresis of C-V curves is caused by recharging the surface states of the density of about 5 x 10(14) m(-2). The value of 1.73 +/- 0.16 was found for the relative dielectric permittivity of PAA/PSS films. DC conductivity of PAA/PSS films was found to be thickness dependent. The mechanism of conductivity transforms from the surface limited conductivity for thin films to the bulk limited for thicker films. (C) 2002 Elsevier Science B.V. All rights reserved.

Item Type: Article
Additional Information: 8th European Conference on Organised Films SEP 03-07, 2001, OTRANTO, ITALY
Research Institute, Centre or Group: Materials and Engineering Research Institute > Thin Films Research Centre > Electronic Materials and Sensors Research Group
Identification Number: 10.1016/S0928-4931(02)00203-5
Depositing User: Ann Betterton
Date Deposited: 19 Apr 2010 17:12
Last Modified: 19 Apr 2010 17:12
URI: http://shura.shu.ac.uk/id/eprint/1417

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