Freestanding single-crystal complete nanorings of zinc oxide were formed via a spontaneous self-coiling process during the growth of polar nanobelts. The nanoring appeared to be initiated by circular folding of a nanobelt, caused by long-range electrostatic interaction. Coaxial and uniradial loop-by-loop winding of the nanobelt formed a complete ring. Short-range chemical bonding among the loops resulted in a single-crystal structure. The self-coiling is likely to be driven by minimizing the energy contributed by polar charges, surface area, and elastic deformation. Zinc oxide nanorings formed by self-coiling of nanobelts may be useful for investigating polar surface–induced growth processes, fundamental physics phenomena, and nanoscale devices.
Ultrathin epitaxial graphite was grown on single-crystal silicon carbide by vacuum graphitization. The material can be patterned using standard nanolithography methods. The tran...
A variety of possible chemisorption models has been investigated for the K/Si(001)2×1 interface by use of the local-density formalism and the discrete variational method to carr...
A combined ex situ x‐ray photoelectron spectroscopy (XPS) and scanning tunneling microscopy (STM) investigation of the passive films formed on Cr(110) single‐crystal surfaces in...
We have produced ultrathin epitaxial graphite films which show remarkable 2D\nelectron gas (2DEG) behavior. The films, composed of typically 3 graphene\nsheets, were grown by th...
While the quality of the current CHARMM22/CMAP additive force field for proteins has been demonstrated in a large number of applications, limitations in the model with respect t...
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