石墨烯海绵的光声效应

Photoacoustic effect of three dimensional graphene sponge

探索了三维石墨烯海绵的光声效应．由于其具有均匀的孔结构以及良好的吸光特性，石墨烯海绵能产生均匀的光声信号．通过研究石墨烯海绵在不同气体中的光声效应，获得了所产生的光声信号与气体性质的关系．研究发现，石墨烯海绵在不同频率（20～20000Hz）范围内，产生的光声信号均具有良好的谐振性．为了进一步解释石墨烯海绵的光声机理，建立了相应的理论模型．这些结果为利用石墨烯材料在光声器件等方面的研究提供了有益的借鉴．

In this paper, photoacoustic effect of three dimensional graphene sponge has been studied. The graphene sponge can produce homogeneous signals due to its homogeneous pore structure and excellent light absorption property. The relationship of photoacoustic signal and gas properties was obtained by studying the photoacoustic effect of graphene sponge in different gases. Besides, the results show that in different frequencies （20-20000 Hz）, the graphene sponge can generate photoacoustic signals with good harmonicity. To further explain the photoacoustic mechanism of graphene sponge, a corresponding theoretical model was also established. These results provide the basis of photoacoustic devices based on graphene materials.