Surface energy-mediated construction of anisotropic semiconductor wires with selective crystallographic polarity
- Title
- Surface energy-mediated construction of anisotropic semiconductor wires with selective crystallographic polarity
- Author
- 홍진표
- Keywords
- ZNO NANOSTRUCTURES; TRANSPORT-PROPERTIES; NANOWIRE ARRAYS; GROWTH; GAN; NANOGENERATORS; NANOBELTS
- Issue Date
- 2014-07
- Publisher
- Nature Publishing Group
- Citation
- Scientific Reports, 2014, 4, P.1-7
- Abstract
- ZnO is a wide band-gap semiconductor with piezoelectric properties suitable for opto-electronics, sensors, and as an electrode material. Controlling the shape and crystallography of any semiconducting nanomaterial is a key step towards extending their use in applications. Whilst anisotropic ZnO wires have been routinely fabricated, precise control over the specific surface facets and tailoring of polar and non-polar growth directions still requires significant refinement. Manipulating the surface energy of crystal facets is a generic approach for the rational design and growth of one-dimensional (1D) building blocks(1- 4). Although the surface energy is one basic factor for governing crystal nucleation and growth of anisotropic 1D structures, structural control based on surface energy minimization has not been yet demonstrated(5-9). Here, we report an electronic configuration scheme to rationally modulate surface electrostatic energies for crystallographic-selective growth of ZnO wires. The facets and orientations of ZnO wires are transformed between hexagonal and rectangular/diamond cross-sections with polar and non-polar growth directions, exhibiting different optical and piezoelectrical properties. Our novel synthetic route for ZnO wire fabrication provides new opportunities for future opto-electronics, piezoelectronics, and electronics, with new topological properties.
- URI
- http://www.nature.com/articles/srep05680http://hdl.handle.net/20.500.11754/53481
- ISSN
- 2045-2322
- DOI
- 10.1038/srep05680
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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