Ae. Aliev et al., STUDIES ON SENSITIVITY OF POROUS SILICON SURFACES TO ENVIRONMENTAL GASES, Journal of materials engineering and performance, 6(2), 1997, pp. 161-164
We have studied the electrophysical properties of porous silicon p-n j
unction in an atmosphere of various gases: moisture, ammonia, benzene,
acetone, and ethanol, The high sensitivity of ac conductivity to the
polar gas molecules is connected with an additional pathway through th
e opened surface of the p-n junction.