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Issue 18, 2016
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The formation mechanism of Janus nanostructures in one-pot reactions: the case of Ag–Ag8GeS6

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Abstract

Herein we describe a large-scale, non-injection “one-pot” batch method for producing large quantities of novel colloidal Ag–Ag8GeS6 heteronanostructures. Using a suite of analytical techniques, including high resolution TEM, HAADF-STEM, XEDS mapping, and XRD, the formation mechanism of the nanostructures is elucidated. The formation is discovered to occur in three stages comprising nucleation, phase separation of the metal and semiconductor components, and the final segregation of the metal and semiconductor components to form the Janus nanostructure. The high ionic mobility and chemical reactivity of Ag enables the self-regulated formation of Janus nanostructures in optimized one-pot reactions – a phenomenon that is almost unique to silver-based systems. As such, silver-based systems are ideal candidates to study the formation of Janus nanostructures.

Graphical abstract: The formation mechanism of Janus nanostructures in one-pot reactions: the case of Ag–Ag8GeS6

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Supplementary files

Article information


Submitted
15 Jan 2016
Accepted
10 Mar 2016
First published
08 Apr 2016

J. Mater. Chem. A, 2016,4, 7060-7070
Article type
Paper

The formation mechanism of Janus nanostructures in one-pot reactions: the case of Ag–Ag8GeS6

J. van Embden, L. Bourgeois, E. Della Gaspera, L. Waddington, Y. Yin, N. V. Medhekar, J. J. Jasieniak and A. S. R. Chesman, J. Mater. Chem. A, 2016, 4, 7060
DOI: 10.1039/C6TA00398B

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