Fig. 1From: Multicolor Photodetector of a Single Er3+-Doped CdS NanoribbonSEM and HRTEM images of the as-synthesized Er-CdS NRs. a SEM image of Er-CdS NRs at low magnification. b SEM image of a single Er-CdS NR at high magnification. c HRTEM image of a single Er-CdS NRBack to article page