Abstract
Bismuth selenide (Bi2Se3) attracts a lot of attention nowadays due to its unique electronic and thermoelectric properties. In this study, fabrication of Bi2Se3 nanosheets by selenite-reducing bacterium (SeRB) was first reported. Morphology, size, and location of the biogenic Bi2Se3 are bacteria-dependent. It is difficult to separate Bi2Se3 generated by Bacillus cereus CC-1 (Bi2Se3-C) from the biomass because of strong interaction with the cell membrane. However, Bi2Se3 produced by Lysinibacillus sp. ZYM-1 (Bi2Se3-Z), is highly dispersed in extracellular space with high stability. Further characterization by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM) on Bi2Se3-Z indicates that the product is a rhombohedral-phase, ultrathin nanosheet-like structure with an average size of ∼100 nm. Subsequently, the photothermal performance of Bi2Se3-Z with the irradiation of 808 nm near-infrared (NIR) laser was determined. When the B...
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