Abstract
Disc-modified nanohelices (DNHs) of ZnO were synthesized by thermal evaporation. TheZnO DNHs are constructed by nanowires which are regularly attached with discs. The axisof the DNH structure is along the ZnO[0001] direction. The pitch distance, the meandiameter, and the thickness of the nanowires are uniform for each ZnO DNH. Within oneperiod there are 12 discs symmetrically attached on the surfaces of the nanowires.The discs are composed of nanometre-sized ZnO crystal cores and amorphousSiO2 shells. The mechanism of formation of the nanostructures is also discussed.
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