Artículos de revistas
Application of the total internal reflection phenomenon as a gas sensing technique using evaporated sno2 thin films
Autor
AGUILAR FRUTIS, M.
ALTUZAR , V.
LOZADA CASSOU, M.
MARTÍNEZ PÉREZ, L.
MUÑOZ AGUIRRE, N.
ZELAYA ÁNGEL, O.
GARIBAY FEBLES, V.
Institución
Resumen
EN ESTE TRABAJO SE DEMUESTRA COMO PUEDE SER UTILIZADO EL FENÓMENO DE REFLEXIÓN INTERNA TOTAL PARA LA DETECCIÓN DE GASES. EN CONDICIONES AMBIENTALES NORMALES SE MIDIERON ESPECTROS DE REFLEXIÓN INTERNA TOTAL DE PELÍCULAS DE SNO2 EVAPORADAS SOBRE SUBSTRATOS DE CUARZO. SE MIDIERON CAMBIOS EN LOS ESPECTROS DE REFLECTANCIA CUANDO LAS PELÍCULAS DE SNO2 SE EXPUSIERON A FLUJOS DE GAS DE CO2 O N2. EN BASE A LOS CAMBIOS OBSERVADOS EN LA REFLECTANCIA SE DEFINE LA SEÑAL DEL SENSOR. RESULTADOS PRELIMINARES MUESTRAN QUE LA RESPUESTA MÁXIMA SE OBTIENE PARA ÁNGULOS DE INCIDENCIA EN LA VECINDAD DEL ÁNGULO CRITICO DEL SISTEMA CUARZO-AIRE.AbstractIN THIS WORK IT IS SHOWN THAT THE TOTAL INTERNAL REFLECTION (TIR) PHENOMENON CAN BE EXPLOITED FOR GAS DETECTION. TOTAL INTERNAL REFLECTANCE MEASUREMENTS FOR EVAPORATED SNO2 THIN FILMS ON QUARTZ SUBSTRATES ARE MEASURED AT AMBIENT CONDITIONS. CHANGES IN THE REFLECTANCE MEASUREMENTS ARE MEASURED WHEN CO2 OR N2 GAS FLOWS ON THE SURFACE OF THE SNO2 FILMS. THE OBSERVED SHIFT IN THE MEASURED REFLECTANCE IS DEFINED AS THE SIGNAL OF THE SENSOR. PRELIMINARY RESULTS SHOW THAT THE MAXIMUM RESPONSE TAKES PLACE AT INCIDENT ANGLES CLOSE TO THE CRITICAL ANGLE OF THE QUARTZ-AIR SYSTEM. IN THIS WORK IT IS SHOWN THAT THE TOTAL INTERNAL REFLECTION (TIR) PHENOMENON CAN BE EXPLOITED FOR GAS DETECTION. TOTAL INTERNAL REFLECTANCE MEASUREMENTS FOR EVAPORATED SNO2 THIN FILMS ON QUARTZ SUBSTRATES ARE MEASURED AT AMBIENT CONDITIONS. CHANGES IN THE REFLECTANCE MEASUREMENTS ARE MEASURED WHEN CO2 OR N2 GAS FLOWS ON THE SURFACE OF THE SNO2 FILMS. THE OBSERVED SHIFT IN THE MEASURED REFLECTANCE IS DEFINED AS THE SIGNAL OF THE SENSOR. PRELIMINARY RESULTS SHOW THAT THE MAXIMUM RESPONSE TAKES PLACE AT INCIDENT ANGLES CLOSE TO THE CRITICAL ANGLE OF THE QUARTZ-AIR SYSTEM.