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Title: Revealing cation-exchange-induced phase transformations in multielemental chalcogenide nanoparticles
Authors: Tan, Joel Ming Rui
Scott, Mary C.
Hao, Wei
Baikie, Tom
Nelson, Christopher T.
Pedireddy, Srikanth
Tao, Runzhe
Ling, Xingyi
Magdassi, Shlomo
White, Timothy
Li, Shuzhou
Minor, Andrew M.
Zheng, Haimei
Wong, Lydia Helena
Keywords: Science::Chemistry
Issue Date: 2017
Source: Tan, J. M. R., Scott, M. C., Hao, W., Baikie, T., Nelson, C. T., Pedireddy, S., ... Wong, L. H. (2017). Revealing cation-exchange-induced phase transformations in multielemental chalcogenide nanoparticles. Chemistry of Materials, 29(21), 9192-9199. doi:10.1021/acs.chemmater.7b03029
Journal: Chemistry of Materials
Abstract: To control the process of cation exchange (CE) in a multielemental system, a detailed understanding of structural changes at the microscopic level is imperative. However, the synthesis of a multielemental system has so far relied on the CE phenomenon of a binary system, which does not necessarily extend to the higher-order systems. Here, direct experimental evidence supported by theoretical calculations reveals a growth model of binary Cu–S to ternary Cu–Sn–S to quaternary Cu–Zn–Sn–S, which shows that cations preferentially diffuse along a specific lattice plane with the preservation of sulfuric anionic framework. In addition, we also discover that, unlike the commonly accepted structure (P63mc), the metastable crystal structure of Cu–Zn–Sn–S phase possesses fixed Sn occupancy sites. By revealing the preferential nature of cations diffusion and growth mechanism, our work provides insight into controlling the stoichiometry and phase purity of novel multielemental materials.
ISSN: 1520-5002
DOI: 10.1021/acs.chemmater.7b03029
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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