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Novel caltrop-like ZnO nanostructures are fabricated on Si (100) substrate using the chemical vapor deposition (CVD) method at 1000°C. The XRD pattern confirms that the as-grown products are ZnO nanostructures which preferentially oriented in the [0001] direction. Every nanostructure has four short ramifications and each ramification is less than 100nm in thickness and from 1.0 to 1.4μm in length...
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