Article abstract


Nature Materials 4, 922 - 927 (2005)
doi:10.1038/nmat1522

Subject Categories: Mechanical properties | Nanoscale materials

Morphology-tuned wurtzite-type ZnS nanobelts

Zhongwu Wang1, Luke L. Daemen1, Yusheng Zhao1, C. S. Zha2, Robert T. Downs3, Xudong Wang4, Zhong Lin Wang4 and Russell J. Hemley5


Nanometre-sized inorganic dots, wires and belts have a wide range of electrical and optical properties, and variable mechanical stability and phase-transition mechanisms that show a sensitive dependency on size, shape and structure. The optical properties of the semiconductor ZnS in wurtzite structures are considerably enhanced, but the lack of structural stability limits technological applications. Here, we demonstrate that morphology-tuned wurtzite ZnS nanobelts show a particular low-energy surface structure dominated by the Unfortunately we are unable to provide accessible alternative text for this. If you require assistance to access this image, or to obtain a text description, please contact npg@nature.com surface facets. Experiments and calculations show that the morphology of ZnS nanobelts leads to a very high mechanical stability to approx6.8 GPa, and also results in an explosive mechanism for the wurtzite-to-sphalerite phase transformation together with in situ fracture of the nanobelts. ZnS wurtzite nanobelts provide a model that is useful not only for understanding the morphology-tuned stability and transformation mechanism, but also for improving synthesis of metastable nanobelts with quantum effects for electronic and optical devices.

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  1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  2. CHESS, Wilson Laboratory, Cornell University, Ithaca, New York 14853, USA
  3. Department of Geosciences, University of Arizona, Tucson, Arizona 85721, USA
  4. School of Materials and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
  5. Geophysical Laboratory, Carnegie Institution of Washington, Washington DC 20015, USA

Correspondence to: Zhongwu Wang1 e-mail: z_wang@lanl.gov

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