Poly(methyl methacrylate) films for organic vapour sensing

CAPAN, R., RAY, A. K., HASSAN, A. K. and TANRISEVER, T. (2003). Poly(methyl methacrylate) films for organic vapour sensing. Journal of Physics D-Applied Physics, 36 (9), 1115-1119.

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Link to published version:: 10.1088/0022-3727/36/9/309

Abstract

Optical constants and fabrication parameters are investigated using surface plasmon resonance (SPR) studies on spun films of poly(methyl methacrylate) (PMMA) derivatives in contact with two different dielectric media. A value of 1.503 for the refractive index of PMMA films produced from a solution having concentration of 1 mg ml(-1) at the speed of 3000 rpm is in close agreement with the data obtained from ellipsometric measurements. The film thickness shows a power-law dependence on the spin speed but the thickness increases almost linearly with the concentration of the spreading solution. These results are in good agreement with the hydrodynamic theory for a low-viscosity and highly volatile liquid. On the basis of SPR measurements under dynamic conditions, room temperature response of PMMA films to benzene vapours is found to be fast, highly sensitive and reversible. The sensitivity of detection of toluene, ethyl benzene and m-xylene is much smaller than that of benzene.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Thin Films Research Centre > Electronic Materials and Sensors Research Group
Identification Number: 10.1088/0022-3727/36/9/309
Depositing User: Helen Garner
Date Deposited: 20 May 2010 17:11
Last Modified: 03 Jun 2010 15:08
URI: http://shura.shu.ac.uk/id/eprint/1975

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