INTEGRATED OPTICAL ATTENUATED TOTAL REFLECTION SPECTROMETRY OF AQUEOUS SUPERSTRATES USING PRISM-COUPLED POLYMER WAVE-GUIDES

被引:61
作者
SAAVEDRA, SS
REICHERT, WM
机构
[1] DUKE UNIV,DEPT BIOMED ENGN,DURHAM,NC 27706
[2] DUKE UNIV,CTR EMERGING CARDIOVASC TECHNOL,DURHAM,NC 27706
关键词
D O I
10.1021/ac00219a019
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Attenuated total reflection (ATR) spectrometry of aqueous solutions in contact with polystyrene Integrated optical waveguides has been investigated. The mode-dependent absorption of evanescent energy by fluorescein solutions adjacent to the waveguide surface was measured and compared to theoretical predictions based on a ray optics approach. Although enhanced sensitivity was observed with increasing mode number, the sensitivity for the highest order mode was less than that predicted by theory. © 1990, American Chemical Society. All rights reserved.
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页码:2251 / 2256
页数:6
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