Fig. 3From: Promotion on Acetone Sensing of Single SnO2 Nanobelt by Eu DopingThe morphology images of Eu-SnO2 NB and SnO2 NB. a SEM, b TEM, and c HRTEM images of Eu-SnO2 NB; d SEM, e TEM, and f HRTEM images of SnO2 NBBack to article page