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Field emission investigations of a single Sb-doped SnO 2 wire synthesized by thermal evaporation have been carried out in conventional field emission geometry under ultrahigh vacuum. An onset field required to draw a current of 1nA has been reproducibly observed to be 9.5×10 3 V/μm. A current density of 5.88×10 3 A/cm 2 has been drawn with an applied field of 2×10 ...
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