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Thin SnO2 nanowires with uniform diameter and large surface-to-volume ratio are synthesized, and a single wire is used to fabricate a high-performance UV photodetector. An ultrahigh external quantum efficiency of 1.32 × 107 is achieved, which is about four orders of magnitude larger than that of conventional SnO2 photodetectors.
Hu et al. (Wed,) studied this question.