Crystal Growth & Design
Crystal Growth & Design
5 years ago

Dissolved Intermediates in Ammonothermal Crystal Growth: Stepwise Condensation of [Ga(NH2)4]− toward GaN

Dissolved Intermediates in Ammonothermal Crystal Growth: Stepwise Condensation of [Ga(NH2)4]− toward GaN
Dietrich Gudat, Eberhard Schlücker, Rainer Niewa, Jan Hertrampf
Ammonothermal synthesis currently provides the best GaN crystals. Upon use of ammonobasic mineralizers, NMR reveals [Ga(NH2)4]− ions to represent the exclusive observable gallium-containing dissolved species in diluted ammonia solutions at room temperature and under autogenous pressure. With RbNH2 or CsNH2 viscous liquids fully miscible with ammonia occur, containing different imido-condensed species depending on concentration, while oxide-impurities lead to oxo-bridged dimers.

Publisher URL: http://dx.doi.org/10.1021/acs.cgd.7b00815

DOI: 10.1021/acs.cgd.7b00815

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