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Reversible Insulator‐to‐Metal Transition in p + ‐Type Mesoporous Silicon Induced by the Adsorption of Ammonia
Author(s) -
Chiesa Mario,
Amato Giampiero,
Boarino Luca,
Garrone Edoardo,
Geobaldo Francesco,
Giamello Elio
Publication year - 2003
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200352114
Subject(s) - mesoporous material , adsorption , silicon , ammonia , materials science , inorganic chemistry , transition metal , metal , electron , conduction band , silicon on insulator , metal–insulator transition , chemistry , metallurgy , physics , organic chemistry , catalysis , quantum mechanics
Gas works wonders! Conduction‐band electrons can be generated in p + ‐type mesoporous crystalline silicon through the adsorption of ammonia (see scheme). Free‐carrier concentration increases with increasing NH 3 adsorption to a critical value, where a reversible insulator‐to‐metal transition occurs.