Facile synthesis of hierarchical Bi2S3 nanostructures for photodetector and gas sensor

The fabrication of a photodetector and gas sensor based on hierarchical Bi2S3 nanostructures is reported. Single crystalline Bi2S3 nanostructures with [001] growth direction were obtained via a facile hydrothermal method without any templates or surfactants. The photodetector showed steady photoresponses with a fast response time of similar to 50 ms. Moreover, these Bi2S3 nanostructures exhibited a good sensing to methanol. These results show these hierarchical Bi2S3 nanostructures are promising candidates for constructing optoelectronic and gas sensing devices.