Synthesis and photoluminescence properties of Bi2S3 nanowires via surfactant micelle-template inducing reaction

Single-crystalline Bi2S3 nanowires, with diameters in the range of 80-200 nm and lengths up to tens of micrometers, have been successfully synthesized through surfactant micelle-template inducing reaction at ambient-pressure and low-temperature. The synthetic route is simple, effective and can provide great opportunities for both fundamental and technological applications. The optical properties of the Bi2S3 nanowires with different diameters were firstly examined by means of photoluminescence spectroscopy at room temperature. The representative photoluminescence spectrum exhibits a great blue-shift from the band gap of 1.30 eV of bulk Bi2S3 to high energy of 1.44 eV, which indicated that these nanostructures showed quantum confinement effects.