Issue 38, 2010
From the journal:

Physical Chemistry Chemical Physics

Morphological tuning, self-assembly and optical properties of indium oxidenanocrystals†

Enyi Ye,a   Shuang-Yuan Zhang,ab   Suo Hon Lim,a   Shuhua Liuab  and  Ming-Yong Han*ab  

* Corresponding authors

a Institute of Materials Research and Engineering, Agency for Science, Technology and Research, 3 Research Link, Singapore 117602
E-mail: my-han@imre.a-star.edu.sg
Fax: (65) 6872 0785
Tel: (65) 6874 1987

b Division of Bioengineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576

Abstract

In this paper, weak acids, weak bases or their mixtures were used as reaction media/coordinating ligands to achieve systematic morphological control over amphoteric indium oxide nanostructures. Different indium/oleic acid molar ratios from 1 : 0, 1 : 1, 1 : 2, 1 : 3, 1 : 6 and 1 : 15 in non-coordinating, weakly coordinating, strongly coordinating and their mixed media were adopted to prepare irregular aggregated nanoparticles and uniform regular/truncated octahedra, etc. In addition to their strong size-dependent absorption, single-crystalline indium oxide octahedra also gave a strong band-edge emission while irregular indium oxide aggregated nanoparticles only exhibited a weak deep-trap emission. Meanwhile, the truncated octahedra were self-assembled into either zigzag lines or pentagram patterns, and the regular octahedra and truncated cubes were self-assembled into hexagonally packed nanocrystal arrays. In addition, the formation mechanism of the various nanostructures under different conditions was investigated in detail.

Graphical abstract: Morphological tuning, self-assembly and optical properties of indium oxide nanocrystals

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Article information

DOI
https://doi.org/10.1039/C0CP00138D
Article type
Paper
Submitted
06 Apr 2010
Accepted
11 Aug 2010
First published
28 Aug 2010

Phys. Chem. Chem. Phys., 2010,12, 11923-11929

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Morphological tuning, self-assembly and optical properties of indium oxide nanocrystals

E. Ye, S. Zhang, S. Hon Lim, S. Liu and M. Han, Phys. Chem. Chem. Phys., 2010, 12, 11923 DOI: 10.1039/C0CP00138D

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