Pressure-Induced Transformations of Three-Component Heterostructural Nanocrystals with CdS–Au₂S Janus Nanoparticles as Hosts and Small Au Nanoparticles as Satellites

Journal Article · 25 October 2019 · ACS Applied Nano Materials

DOI: https://doi.org/10.1021/acsanm.9b01860 · OSTI ID:1632391

Zhu, Hua  ^[1]; Cai, Tong ^[1]; Yuan, Yucheng  ^[1]; Wang, Xudong  ^[2]; Nagaoka, Yasutaka ^[1]; Zhao, Jing  ^[2]; Liu, Zhenxian ^[3]; Li, Ruipeng ^[3]; Chen, Ou  ^[1]

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1. Brown Univ., Providence, RI (United States). Dept. of Chemistry
2. Univ. of Connecticut, Storrs, CT (United States)
3. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source

Heterostructural nanocrystals (HNCs) have drawn enormous attention because of the combined and synergistic properties inherited from their individual components and interactions. In this paper, 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.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
• Grant/Contract Number: SC0012704; NA0003858
• OSTI ID: 1632391
• Report Number(s): BNL--216003-2020-JAAM
• Journal Information: ACS Applied Nano Materials, Journal Name: ACS Applied Nano Materials Journal Issue: 11 Vol. 2; ISSN 2574-0970
• Publisher: American Chemical Society (ACS)Copyright Statement
• Country of Publication: United States
• Language: English