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A linear-to-rotary motion converter is demonstrated using 3-D SiGe/Si dual-chirality helical nanobelts (DCHNBs). Analytical and experimental investigation shows that the motion conversion has excellent linearity for small deflections. The conversion ratios of displacement and load for a SiGe/Si DCHNB (an 8-nm-thick Si0.6Ge0.4 and a 10-nm-thick Si layer) are found to be 171.3deg/mum and 2.110 times...
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