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Rapid chemography of porous silicon undergoing hydrolysis
Author(s) -
Canham Leigh T.,
Saunders Steven J.,
Heeley Paul B.,
Keir Andrew M.,
Cox Timothy I.
Publication year - 1994
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.19940061115
Subject(s) - porous silicon , materials science , silicon , semiconductor , porosity , hydrolysis , porous medium , chemical engineering , health hazard , nanotechnology , composite material , optoelectronics , organic chemistry , chemistry , medicine , environmental health , engineering
Highly porous silicon reacts with water vapor in the air to create images on photographic plates within seconds. It is demonstrated that this process, known as chemography, can be used diagnostically to reveal inhomogeneity in porous silicon layers that is not always detectable by optical or electron microscopy. It is suggested that many dried highly porous semiconductors may constitute a significant health hazard owing to the liberation of high concentrations of toxic hydrides through hydrolysis.