Open AccessPorous silicon ammonia gas sensor
Author(s) -
A. Chaillou,
Joël Charrier,
Nathalie Lorrain,
M. Sarret,
L. Haji
Publication year - 2006
Publication title -
proceedings of spie, the international society for optical engineering/proceedings of spie
Language(s) - English
Resource type - Conference proceedings
SCImago Journal Rank - 0.192
H-Index - 176
eISSN - 1996-756X
pISSN - 0277-786X
DOI - 10.1117/12.663636
Subject(s) - bromothymol blue , materials science , waveguide , silicon , ammonia , molecule , porous silicon , planar , mesoporous material , signal (programming language) , optoelectronics , ammonia gas , sensitivity (control systems) , parts per notation , analytical chemistry (journal) , chemistry , electronic engineering , chromatography , catalysis , biochemistry , computer graphics (images) , organic chemistry , computer science , programming language , engineering
conference 6189 « Optical Sensing II », oral session 6 « Chemical Sensors » [6189-29]International audienceA planar optical waveguide is manufactured by the functionnalisation of oxidised mesoporous silicon with Bromothymol Blue to achieve a sensitive ammonia sensor suitable for low gas concentrations. The propagated light intensity is measured at the output of the waveguide. The sensitivity at low concentrations and the short time of reaction of the sensor are enhanced by a confinement effect of the gas molecules inside the pores. The dependence of the output signal with gas concentration is demonstrated. When the ammonia flow is stopped, the reversibility of the initial characteristics of the propagated light is naturally obtained with the disappearance of the gas molecules
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom