Berlin 2012 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 15: Poster: New Instruments and Methods
CPP 15.19: Poster
Dienstag, 27. März 2012, 18:15–20:15, Poster A
Design and Characterization of a Gas Sensor System Consisting of a Poly(amide-imide) and Cryptophane-A Covered Optical Fiber — Carmen M. Gonzalez Henriquez1, •Ulrich G. Volkmann1, Marcelo Cisternas1, Rosario Ortega1, Mauricio Sarabia1, Patrick Huber1, and Alvaro Henriquez2 — 1Surface Lab — 2Plasma and Optics Lab, Facultad de Física, Pontificia Universidad Católica de Chile, Chile
The principal innovation of this project is the design of a gas sensor based on the usage of a mixture between poly(amide-imide) oligomer [1] as matrix and cryptophane-A [2] covering an optical fiber. The optical behavior of this system was studied upon adsorption of different gases, typical of the decomposition of organic matter: CO2, N2, CH4 and H2. Using ellipsometry in a modified PCSA-null setup, we detect large changes in the optical polarization as a function of gas pressure or concentration.
[1] Carmen M. Gonzalez Henriquez et al. Structural symmetry breaking of silicon-containing poly(amide-imide) oligomers and its relation to electrical conductivity and Raman-active vibrations. Polymer Int (2011), DOI: 10.1002/pi.3169.
[2] Suozhu Wu et al. Mode-filtered light methane gas sensor based on cryptophane A. Analytica Chimica Acta (2009), 633 (2), 238-243.
C.M. Gonzalez Henriquez acknowledges a scholarship from VRI Nr. 10/2010 (PUC). Work supported by FONDECYT project Nr. 1100882.