Journal
ACS APPLIED NANO MATERIALS
Volume 2, Issue 11, Pages 6804-6808Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.9b01860
Keywords
high-pressure processing; heterostructural nanocrystal; heterotrimer; coalescence; nanocrystal superlattice
Funding
- Brown University
- National Science Foundation [CBET-1936223, CHE-1554800]
- DOE, Office of Science [DE-SC0012704]
- COMPRES, the Consortium for Materials Properties Research in Earth Sciences under NSF [EAR 1606856]
- DOE/NNSA [DE-NA-0003858]
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Heterostructural nanocrystals (HNCs) have drawn enormous attention because of the combined and synergistic properties inherited from their individual components and interactions. Here we design a three-component CdS-Au2S-Au Janus-satellite HNC to study the pressure process of HNC superlattices (HNC-SLs). In situ small/wide-angle X-ray scattering shows that the HNC-SLs can undergo structural transformations at both atomic and meso scales. At the same time, CdS-Au2S-Au Janus-satellite HNCs can morphologically transform into CdS-Au2S-Au heterotrimer HNCs through intraparticle migration and coalescence of Au satellites. Our results demonstrate that pressure can be employed as a clean and efficient way to fabricate complex heterostructural nanomaterials suitable for potential applications in photocatalysis and theranostics.
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