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Catalyst–nanostructure interaction and growth of ZnS nanobelts

Christine Borchers1, Daniel Stichtenoth, Sven Müller, Daniel Schwen and Carsten Ronning

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Details of the vapour–liquid–solid Au droplet catalysed growth of ZnS nanobelts are elucidated in this work. The inclination of the Au droplet after solidification shows that it is indeed in the liquid state during nanobelt growth. Numerous stacking faults are observed when (0001) wurtzite is the side surface of the nanobelt. Compressive stress at the droplet–nanobelt–atmosphere triple interface is the cause of the stacking faults. Sawteeth-like structures are observed on the Zn-terminated polar (0001) side surface only. These surfaces are chemically active, while S-terminated (000\bar
{1}) surfaces and non-polar surfaces are not. On these active surfaces, autocatalysed vapour–solid growth leads to the formation of the observed sawteeth.


PACS

61.46.-w Structure of nanoscale materials

81.07.-b Nanoscale materials and structures: fabrication and characterization

81.30.Fb Solidification

61.72.Nn Stacking faults and other planar or extended defects

Subjects

Condensed matter: structural, mechanical & thermal

Nanoscale science and low-D systems

Dates

Issue 4 (28 February 2006)

Received 5 October 2005, in final form 21 November 2005

Published 30 January 2006



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