CAPAN, R., RAY, A. K., RICHARDSON, T. H., HASSAN, A. K. and DAVIS, F. (2005). Pyroelectric and conduction properties of Z-type calix 4 acid Langmuir-Blodgett films. Journal of Nanoscience and Nanotechnology, 5 (11), 1910-1914.Full text not available from this repository.
Non-centrosymmetric Z-type Langmuir-Blodgett (LB) films were prepared by transferring a calix acid monolayer from a subphase of Millipore water (18 M Omega cm(-1)) onto aluminised glass substrates. Electrical measurements were performed at room temperature on LB films with a sandwich structure comprising a 50 nm thick thermally evaporated aluminium film. A pyroelectric figure of merit of 2.23 mu C m(-2)K(-1) is reported for this LB system. The low voltage value of conductivity is 1.82 x 10(-12) S m(-1). The electrode-limited Schottky effect is responsible for the conduction mechanism at a relatively high field due to the dc bias and the barrier potential height is determined to be 1.72 eV. The ac conductance for both samples shows a typical power law dependence with a value of approximate to 0.86 for the exponent.
|Research Institute, Centre or Group:||Materials and Engineering Research Institute > Thin Films Research Centre > Electronic Materials and Sensors Research Group|
|Depositing User:||Helen Garner|
|Date Deposited:||21 May 2010 09:34|
|Last Modified:||03 Jun 2010 14:07|
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