High Pressure Induced in Situ Solid-State Phase Transformation of Nonepitaxial Grown Metal@Semiconductor Nanocrystals

Muwei Ji, Hongzhi Wang, Yu Gong, Haixia Cheng, Lirong Zheng, Xinyuan Li, Liu Huang, Jia Liu, Zhihua Nie, Qiaoshi Zeng, Meng Xu, Jiajia Liu, Xiaoxu Wang, Ping Qian, Caizhen Zhu, Jin Wang, Xiaodong Li, Jiatao Zhang*

*Corresponding author for this work

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Abstract

Considering the large lattice mismatch induced interface strain between nonepitaxial grown monocrystalline semiconductor shell and metal core, we studied the solid-state phase transformation of such nonepitaxial grown Au@CdS core/shell NCs under high pressure in this paper. Consistent with HRTEM characterizations, the high resolution Raman spectra and synchrotron angle-dispersive X-ray diffraction (ADXRD) spectra evolution were utilized to investigate the hydrostatic pressure (0-24 GPa) induced gradual phase transformation. Due to the strong lattice interactions between Au core and CdS shell, the different behavior and improved stability under high pressure appeared compared to single quantum dots (QDs).

Original languageEnglish
Pages (from-to)6544-6549
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume9
Issue number22
DOIs
Publication statusPublished - 15 Nov 2018

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Ji, M., Wang, H., Gong, Y., Cheng, H., Zheng, L., Li, X., Huang, L., Liu, J., Nie, Z., Zeng, Q., Xu, M., Liu, J., Wang, X., Qian, P., Zhu, C., Wang, J., Li, X., & Zhang, J. (2018). High Pressure Induced in Situ Solid-State Phase Transformation of Nonepitaxial Grown Metal@Semiconductor Nanocrystals. Journal of Physical Chemistry Letters, 9(22), 6544-6549. https://doi.org/10.1021/acs.jpclett.8b03057