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Single crystalline Bi2O3 nanosheets have been synthesized by the surfactant assisted solvothermal method,using oleic acid and sodium dodecyl benzene sulfonate (SDBS) as compound surfactants. The thickness of Bi2O3 nanosheets is 40–70 nm with a monoclinic crystal structure. High-resolution transmission electron microscopy observation reveals that ( 345 ) lattice plane of the single crystal is parallel to the surface of the nanosheets. The cooperative effect of oleic acid encapsulated SDBS is the key to form single crystalline α-Bi2O3 nanosheets with a preferred growth orientation. An obvious blue shift of the single crystalline Bi2O3 nanosheets with a preferred surface ( 345 ) is observed due to quantum confinement effects in thickness and optical anisotropy.
Single crystalline Bi2O3 nanosheets have been synthesized by the surfactant assisted solvothermal method, using oleic acid and sodium dodecyl benzene sulfonate (SDBS) as compound surfactants. The thickness of Bi2O3 nanosheets is 40-70 nm with a monoclinic crystal structure. High-resolution transmission electron microscopy observations reveals (345) lattice plane of the single crystal is parallel to the surface of the nanosheets. The cooperative effect of oleic acid encapsulated SDBS is the key to form single crystalline α-Bi2O3 nanosheets with a preferred growth orientation. An obvious blue shift of the single crystalline Bi2O3 nanosheets with a preferred surface (345) is observed due to quantum confinement effects in thickness and optical anisotropy.