SnO2 Nanoparticles: Graphene-Skeleton Heat-Coordinated and Nanoamorphous-Surface-State Controlled Pseudo-Negative-Photoconductivity of Tiny SnO2 Nanoparticles (Adv. Mater. 23/2015)

A pseudo‐negative‐photoconductivity (PsdNPC) effect of SnO2 nanoparticles is reported by Y. Gao and co‐workers on page 3525. Combined with a light exciting effect, photoelectric logic gates are fabricated. The PsdNPC originates from intensive electron scattering of the nanoamorphous‐surface‐state of the SnO2 nanoparticles, resulting in a small inner current and a large absorption of moisture in the dark, leading to a large surface current. Graphene, as the inner skeleton, can shorten the response and recovery times.