Shape-controlled growth of micrometer-sized gold crystals by a slow reduction method

Xiaogang Liu, Nianqiang Wu, Benjamin H. Wunsch, Robert J. Barsotti, Francesco Stellacci

Research output: Contribution to journalArticle

Abstract

A method for the synthesis of micrometer-sized gold crystals with shapes ranging from three-dimensional (3D) triangles, octahedra, and pentagonal decahedra to two-dimensional (2D) plates and one-dimensional nanowire is described. These morphologies are obtained by controlling the relative growth rates of the crystal planes by the selective use of capping ligand mixtures. The size transition and shape evolution of the crystals are monitored by electron microscopy, X-ray powder diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Micrometer-sized crystals with different feature shapes and sizes can be obtained by changing the composition of amine ligand mixture. The shape of the particles is determined by the relative growth rates on particular cryatallographic planes during the growth process. Several procedures exists for the preparation of 1D nanostructures such as rods and wires which includes electrochemical intemplates, photochemical synthesis and seedmediated growth.

Original languageEnglish
Pages (from-to)1046-1050
Number of pages5
JournalSmall
Volume2
Issue number8-9
DOIs
Publication statusPublished - Aug 2006

Fingerprint

Gold
Crystals
Growth
Nanowires
Ligands
Powder Diffraction
Photoelectron Spectroscopy
Nanostructures
Crystallization
X-Ray Diffraction
X ray powder diffraction
Electron microscopy
Amines
Electron Microscopy
X ray photoelectron spectroscopy
Wire
Chemical analysis

Keywords

  • Amines
  • Electron microscopy
  • Gold
  • Microcrystals
  • Molecular recognition

ASJC Scopus subject areas

  • Biomaterials
  • Engineering (miscellaneous)
  • Biotechnology
  • Medicine(all)

Cite this

Liu, X., Wu, N., Wunsch, B. H., Barsotti, R. J., & Stellacci, F. (2006). Shape-controlled growth of micrometer-sized gold crystals by a slow reduction method. Small, 2(8-9), 1046-1050. https://doi.org/10.1002/smll.200600219

Shape-controlled growth of micrometer-sized gold crystals by a slow reduction method. / Liu, Xiaogang; Wu, Nianqiang; Wunsch, Benjamin H.; Barsotti, Robert J.; Stellacci, Francesco.

In: Small, Vol. 2, No. 8-9, 08.2006, p. 1046-1050.

Research output: Contribution to journalArticle

Liu, X, Wu, N, Wunsch, BH, Barsotti, RJ & Stellacci, F 2006, 'Shape-controlled growth of micrometer-sized gold crystals by a slow reduction method', Small, vol. 2, no. 8-9, pp. 1046-1050. https://doi.org/10.1002/smll.200600219
Liu, Xiaogang ; Wu, Nianqiang ; Wunsch, Benjamin H. ; Barsotti, Robert J. ; Stellacci, Francesco. / Shape-controlled growth of micrometer-sized gold crystals by a slow reduction method. In: Small. 2006 ; Vol. 2, No. 8-9. pp. 1046-1050.
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