Fig. 1From: The Extremely Enhanced Photocurrent Response in Topological Insulator Nanosheets with High Conductancea, b, and c show the SEM pictures of three Sb2Se2Te nanosheets. The nanosheet thickness is measured by AFM. Two Pt contacts were deposited on a nanosheet to measure the photocurrent. d, e, and f reveal the voltage-current relation, and it is linear. That indicates the ohmic contact between the Pt electrodes and Sb2Se2Te nanosheetsBack to article page