Thin films of calix-4-resorcinarene deposited by spin coating and Langmuir-Blodgett techniques: determination of film parameters by surface plasmon resonance

被引:36
作者
Hassan, AK
Nabok, AV
Ray, AK
Lucke, A
Smith, K
Stirling, CJM
Davis, F
机构
[1] Sheffield Hallam Univ, Sch Engn, Phys Elect & Fiber Opt Res Labs, Sheffield S1 1WB, S Yorkshire, England
[2] Univ Sheffield, Ctr Mol Mat, Sheffield S3 7HF, S Yorkshire, England
[3] Gillette UKRDL, Reading, Berks, England
来源
MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS | 1999年 / 8-9卷
关键词
Langmuir-Blodgett; spin coating; surface plasmon resonance; chemical sensors;
D O I
10.1016/S0928-4931(99)00014-4
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Amphiphilic calix-4-resorcinarene (C-4-RA) has been deposited as thin films using both spin coating and Langmuir-Blodgett (LB) techniques. Both LB and spin-coated films were studied by surface plasmon resonance (SPR) using Kretschmann's prism configuration, and their optical parameters have been evaluated. LB film thickness d obtained from SPR curve fitting procedure was plotted as a function of the number of layers and from this, a bi-layer thickness of 2.34 nm was determined. The thickness of spun films produced at a spinning speed of 2000 rpm is found to be equivalent to that of six to eight monolayer LB films. Both types of films were found to have a similar refractive index value of about 1.47, Using SPR technique, LB and spun films of C-4-RA of comparable thickness were found to respond in a similar manner when exposed to 400 ppm toluene vapour, indicating a structural similarity between films produced by "wet'' techniques, such as LB and spin coating. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:251 / 255
页数:5
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