Nobler than the Noblest: Noncubic Gold Microcrystallites

Angewandte Chemie
Gangaiah MettelaGiridhar U Kulkarni

Abstract

Conventional gold comprising the cubic lattice is universally known for its stability. However, well known to chemists and metallurgists, this nobility is challenged by reagents such as aqua regia, which dissolve gold to form a salt solution. Among metals, mercury blends with gold to form amalgam, otherwise transition metals such as copper tend to interact with gold surfaces in electrochemical media. Herein, we report a combined experimental and theoretical investigation of the stability of Au microcrystallites bearing unconventional crystal lattices that exhibit enhanced stability towards Hg and aqua regia and practically no interaction with Cu during electroless plating. The unconventional gold is undoubtedly nobler.

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Citations

Sep 18, 2021·Chemistry : a European Journal·Chaitali Sow, Giridhar U Kulkarni

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