Self-assembled single-crystalline Si 1− x Ge x nanorings (NRs), as small as 10 nm with narrow distributions of height and diameter, have been fabricated without any specific equipment. Compared to other approaches for nanofabricating the ring-like structures, the smallest Si 1− x Ge x NRs with the highest density were obtained by the mediation of Au nanodots. The process promises the availability of Si 1− x Ge x NRs with a wide range of Ge concentration and size, and can serve as a useful platform for the fundamental understanding and future practical applications of NR devices.
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He et al. (2010) studied this question.
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