Multifunctionality of silver closo-boranes

Mark Paskevicius (), Bjarne R. S. Hansen, Mathias Jørgensen, Bo Richter and Torben R. Jensen ()
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Mark Paskevicius: Aarhus University
Bjarne R. S. Hansen: Aarhus University
Mathias Jørgensen: Aarhus University
Bo Richter: Aarhus University
Torben R. Jensen: Aarhus University

Nature Communications, 2017, vol. 8, issue 1, 1-6

Abstract: Abstract Silver compounds share a rich history in technical applications including photography, catalysis, photocatalysis, cloud seeding and as antimicrobial agents. Here we present a class of silver compounds (Ag2B10H10 and Ag2B12H12) that are semiconductors with a bandgap at 2.3 eV in the green visible light spectrum. The silver boranes have extremely high ion conductivity and dynamic-anion facilitated Ag+ migration is suggested based on the structural model. The ion conductivity is enhanced more than two orders of magnitude at room temperature (up to 3.2 mS cm−1) by substitution with AgI to form new compounds. Furthermore, the closo-boranes show extremely fast silver nano-filament growth when excited by electrons during transmission electron microscope investigations. Ag nano-filaments can also be reabsorbed back into Ag2B12H12. These interesting properties demonstrate the multifunctionality of silver closo-boranes and open up avenues in a wide range of fields including photocatalysis, solid state ionics and nano-wire production.

Date: 2017
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DOI: 10.1038/ncomms15136

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