Growth of Co<sub>9</sub>S<sub>8</sub> Islands on Cu<sub>2</sub>S\nNanodisks
Biman Jana (118463)Dominic Varghese (8423937)Awadhesh Narayan (1535113)Anshu Pandey (1267986)
Abstract
Nanosized heterojunctions enable\nthe study of physical\nprocesses\nsuch as charge transfer and also present a substrate to realize low-dimensionality\ndevices. Here, we describe the formation of pristine heterojunctions\nbetween Cu<sub>2</sub>S and Co<sub>9</sub>S<sub>8</sub>. We observed\nheterojunction formation in a single reaction. Heteroassembly occurs\ndue to the Cu<sub>2</sub>S nanodisk (ND)-assisted nucleation of Co<sub>9</sub>S<sub>8</sub> nanocrystals (NCs). Evidence for this mechanism\ncomes from the observation of epitaxy between the two materials. Heteroassemblies\nexhibit emergent physical properties that are absent in the two independent\nphases.
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