Three-dimensional controlled growth of monodisperse sub-50 nm heterogeneous nanocrystals

Deming Liu, Xiaoxue Xu, Yi Du, Xian Qin, Yuhai Zhang, Chenshuo Ma, Shihui Wen, Wei Ren, Ewa M. Goldys, James A. Piper, Shixue Dou, Xiaogang Liu () and Dayong Jin ()
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Deming Liu: Laboratory of Advanced Cytometry, ARC Centre of Excellence for Nanoscale BioPhotonics, Macquarie University
Xiaoxue Xu: Laboratory of Advanced Cytometry, ARC Centre of Excellence for Nanoscale BioPhotonics, Macquarie University
Yi Du: Institute for Superconducting and Electronic Materials, Innovation Campus, University of Wollongong
Xian Qin: Institute of Materials Research and Engineering
Yuhai Zhang: National University of Singapore
Chenshuo Ma: Laboratory of Advanced Cytometry, ARC Centre of Excellence for Nanoscale BioPhotonics, Macquarie University
Shihui Wen: Laboratory of Advanced Cytometry, ARC Centre of Excellence for Nanoscale BioPhotonics, Macquarie University
Wei Ren: Laboratory of Advanced Cytometry, ARC Centre of Excellence for Nanoscale BioPhotonics, Macquarie University
Ewa M. Goldys: Laboratory of Advanced Cytometry, ARC Centre of Excellence for Nanoscale BioPhotonics, Macquarie University
James A. Piper: Laboratory of Advanced Cytometry, ARC Centre of Excellence for Nanoscale BioPhotonics, Macquarie University
Shixue Dou: Institute for Superconducting and Electronic Materials, Innovation Campus, University of Wollongong
Xiaogang Liu: Institute of Materials Research and Engineering
Dayong Jin: Laboratory of Advanced Cytometry, ARC Centre of Excellence for Nanoscale BioPhotonics, Macquarie University

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract The ultimate frontier in nanomaterials engineering is to realize their composition control with atomic scale precision to enable fabrication of nanoparticles with desirable size, shape and surface properties. Such control becomes even more useful when growing hybrid nanocrystals designed to integrate multiple functionalities. Here we report achieving such degree of control in a family of rare-earth-doped nanomaterials. We experimentally verify the co-existence and different roles of oleate anions (OA−) and molecules (OAH) in the crystal formation. We identify that the control over the ratio of OA− to OAH can be used to directionally inhibit, promote or etch the crystallographic facets of the nanoparticles. This control enables selective grafting of shells with complex morphologies grown over nanocrystal cores, thus allowing the fabrication of a diverse library of monodisperse sub-50 nm nanoparticles. With such programmable additive and subtractive engineering a variety of three-dimensional shapes can be implemented using a bottom–up scalable approach.

Date: 2016
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DOI: 10.1038/ncomms10254

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