IR detection of NO2 using p+ porous silicon as a high sensitivity sensor.
Mesoporous silicon doped with 3.0 x 10(19) B atoms cm-3 (p(+)-type) is an insulating material which dramatically increases its electrical conductivity when exposed to traces of gaseous NO2; nitrogen dioxide chemisorption at the surface generates carriers, the population of which is readily evaluated through the intensity of IR absorption.
Geobaldo
F
F
Dipartimento di Scienza dei Materiali e Ingegneria Chimica, Politecnico di Torino, Corso Duca degli Abruzzi 24 10129, Torino, Italy.
Onida
B
B
Rivolo
P
P
Borini
S
S
Boarino
L
L
Rossi
A
A
Amato
G
G
Garrone
E
E