Fig. 2
From: Multicolor Photodetector of a Single Er3+-Doped CdS Nanoribbon
SEM, EDX, and elemental mappings. a SEM image of a single Er-CdS NR. b Corresponding SEM-EDX spectrum recorded from the nanoribbon. c–f 2D elemental mappings for the three detected elements (Er-CdS, Cd, S, and Er)