Synthesis of a mesoporous single crystal Ga2O3 nanoplate with improved photoluminescence and high sensitivity in detecting CO

A new approach is proposed to synthesize a mesoporous single crystal Ga2O3 nanoplate by heating a single crystal nanoplate of GaOOH, which involves an ion exchange between KGaO2 and CH3COOH at room temperature for the formation of GaOOH and pseudomorphic and topotactic phase transformation from GaOOH to Ga2O3.