Room-Temperature Synthesis and Luminescent Properties of Single-Crystalline SrMoO4 Nanoplates

Two-dimensional (2D) free-standing single-crystalline SrMoO 4 nanoplates of obvious quasi-square shape have been controllably synthesized using a facile liquid approach at room temperature. The structural characterizations of the nanoplates were investigated in detail by means of XRD, FESEM, and HRTEM. The results indicate that the 2D quasi-square SrMoO 4 nanoplates can be formed through the oriented connection and self-assembly process. Meanwhile, controlled experiments show that the concentration of cetyltrimethylammonium bromide (CTAB), water content, reaction time, and concentration of Sr 2+ and MoO 4 2− play important roles in the formation of the nanoplates. Moreover, the ultraviolet−visible (UV−vis) absorbance spectra reveal a characteristic optical band gap of 3.12 eV. Most interestingly, such SrMoO 4 nanoplates present a strong and broad blue PL emission, which exhibits a noted blue shift compared to previous reports, indicating that the square-shaped SrMoO 4 nanostructures have great potential to be applied in luminescent and optoelectronic devices.