Assembling SnO Nanosheets into Microhydrangeas: Gas Phase Synthesis and Their Optical Property.

Large scale SnO microhydrangeas are obtained successfully through thermally evaporating of SnO₂ powder wrapped by a filter paper at 1050°C and using gold coated Si wafer as the substrate. The as-obtained SnO microhydrangeas are consisted of many thin nanosheets with the thicknesses of 30-60 nm and the diameters of 500-600 nm. A vapor-liquid-solid (VLS) growth mechanism for the as-synthesized SnO microhydrangeas was proposed based on experimental results. Photoluminescence spectrum (PL) shows that there is a strong sharp ultraviolet emission peak at 390 nm, revealing that these three-dimensional SnO microhydrangeas may have potential applications in optoelectronic fields. [ABSTRACT FROM AUTHOR]