Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University , 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.
Department of Chemistry, Faculty of Science, Hokkaido University , Kita-10, Nishi-8, Kita-ku, Sapporo 060-0810, Japan.
ACS Appl Mater Interfaces. 2017 Mar 8;9(9):8413-8419. doi: 10.1021/acsami.6b16719. Epub 2017 Feb 27.
We demonstrate the simultaneous formation and spatial patterning of ZnO nanocrystals on an indium-tin oxide (ITO) surface upon local heating using a laser (1064 nm) and subsequent formation of microbubbles. Laser irradiation of an ITO surface in aqueous [Zn(NH)] solution (1.0 × 10 M at pH 12.0) under an optical microscope produced ZnO nanocrystals, the presence of which was confirmed by X-ray diffraction analysis and Raman microspectroscopy. Scanning the focused laser beam over the ITO surface generated a spatial ZnO pattern (height: ∼60 nm, width: ∼1 μm) in the absence of a template or mask. The Marangoni convection generated in the vicinity of the microbubbles resulted in a rapid concentration/accumulation of [Zn(NH)] around the microbubbles, which led to the formation of ZnO at the solid-bubble-solution three-phase contact line around the bubbles and thus afforded ZnO nanocrystals on the ITO surface upon local heating with a laser.
我们通过激光（1064nm）局部加热和随后形成微泡，演示了在氧化铟锡（ITO）表面上同时形成和空间图案化 ZnO 纳米晶体。在光学显微镜下，在 pH 值为 12.0 的水合 [Zn(NH₃)] 溶液（1.0×10⁻³M）中对 ITO 表面进行激光辐照，产生了 ZnO 纳米晶体，通过 X 射线衍射分析和拉曼微光谱证实了其存在。在没有模板或掩模的情况下，在 ITO 表面上扫描聚焦激光束，生成了具有空间图案的 ZnO（高度：约 60nm，宽度：约 1μm）。在微泡附近产生的 Marangoni 对流导致 [Zn(NH₃)] 在微泡附近快速浓缩/积累，这导致在气泡周围的固-泡-溶液三相接触线上形成 ZnO，从而在激光局部加热时在 ITO 表面上形成 ZnO 纳米晶体。
