Pressure compression of CdSe nanoparticles into luminescent nanowires

Science Advances
Binsong LiHongyou Fan

Abstract

Oriented attachment (OA) of synthetic nanocrystals is emerging as an effective means of fabricating low-dimensional nanoscale materials. However, OA relies on energetically favorable nanocrystal facets to grow nanostructured materials. Consequently, nanostructures synthesized through OA are generally limited to a specific crystal facet in their final morphology. We report our discovery that high-pressure compression can induce consolidation of spherical CdSe nanocrystal arrays, leading to unexpected one-dimensional semiconductor nanowires that do not exhibit the typical crystal facet. In particular, in situ high-pressure synchrotron x-ray scattering, optical spectroscopy, and high-resolution transmission electron microscopy characterizations indicate that by manipulating the coupling between nanocrystals through external pressure, a reversible change in nanocrystal assemblies and properties can be achieved at modest pressure. When pressure is increased above a threshold, these nanocrystals begin to contact one another and consolidate, irreversibly forming one-dimensional luminescent nanowires. High-fidelity molecular dynamics (MD) methods were used to calculate surface energies and simulate compression and coalescence mechanism...Continue Reading

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Citations

Jan 31, 2020·Nature Communications·Youfeng Yue, Yasuo Norikane
Apr 18, 2018·Proceedings. Mathematical, Physical, and Engineering Sciences·Yoichi TakatoSurajit Sen
Mar 27, 2019·Angewandte Chemie·Wenbo WeiHongyou Fan
Feb 13, 2021·Journal of the American Chemical Society·Lingyao MengYang Qin
Jan 19, 2021·Accounts of Chemical Research·Somnath KoleyUri Banin
May 1, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Fatemeh Heidari Gourji, Dhayalan Velauthapillai
May 7, 2019·Chemical Reviews·Feng BaiHongyou Fan
Mar 9, 2019·Journal of the American Chemical Society·Juntong ZhuHongyou Fan
Apr 11, 2019·Journal of the American Chemical Society·Yue ShiBo Zou
Sep 29, 2018·Journal of the American Chemical Society·Guanjun XiaoBo Zou
Mar 24, 2020·Journal of the American Chemical Society·Lingyao MengHongyou Fan
Jan 21, 2020·The Journal of Physical Chemistry Letters·Pengfei LvBo Zou

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Methods Mentioned

BETA
transmission electron microscopy
x-ray scattering
chips

Software Mentioned

LAMMPS ( Large - scale Atomic / Molecular Massively Parallel S...
Fit2D

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