Reduced graphene oxide-porous In2O3 nanocubes hybrid nanocomposites for room-temperature NH3 sensing

Metal oxide semiconductors(MOS)-reduced graphene oxide(rGO)nanocomposites have attracted great attention for room-tempe rature gas sensing applications.The development of novel sensing materials is the key issue for the effective detection of ammoniagas at room temperature.In the present work,the novel reduced graphene oxide(rGO)-In2 O3 nanocubes hybrid materials have been prepared via a simple electrostatic self-assembly strategy.Characterization re sults exhibit that the intimate interfacial contact between In2 O3 nanocubes and the rGO sheets are achieved.Particularly,the as-prepared rGO/In2 O3 nanocomposites displayed high sensitivity,fast response and excellent selectivity towards ammonia(NH3)at room-temperature,which clearly uncovers the merit of structural design and rational integration with rGO sheets.The superior gas sensing performance of the rGO/In2 O3 nanocomposites can be attributed to the synergetic effects of rGO sheets and porous In2 O3 nanocubes.The reported synthesis offers a general approach to rGO/MOS-based semiconductor composites for room-temperature gas sensing applications.