Ko Yeong Hwan, Yu Jae Su
Department of Electronics and Radio Engineering, Kyung Hee University, Giheung-gu, Yongin, South Korea.
Opt Express. 2011 Dec 19;19(27):25935-43. doi: 10.1364/OE.19.025935.
We reported the enhancement of light scattering in the urchin-aggregation shaped closely-packed hierarchical ZnO nanostructures, fabricated by a simple and scalable process based on the hydrothermal method utilizing the silica microspheres monolayer as a two-dimensional periodic template. From theoretical predictions, the diffuse light scattering is closely related to the size of silica microspheres as light diffusion centers. Moreover, the ZnO nanorod arrays on silica microspheres monolayer provide the further enhancement of light scattering. The experimentally fabricated urchin-aggregation shaped ZnO nanostructures using silica microspheres of 970 nm indicated a high density of ZnO nanorods with a wide bending angle, which led to the largely increased photoluminescence intensity and a high transmittance haze ratio of > 70% in the wavelength range of 400-900 nm in keeping with a high total transmittance. The contact angles of a water droplet on the surface of the samples were also explored.
我们报道了通过一种简单且可扩展的水热法制备的海胆聚集状紧密堆积分层ZnO纳米结构中的光散射增强，该方法利用二氧化硅微球单层作为二维周期性模板。从理论预测来看，漫射光散射与作为光扩散中心的二氧化硅微球尺寸密切相关。此外，二氧化硅微球单层上的ZnO纳米棒阵列进一步增强了光散射。使用970 nm二氧化硅微球通过实验制备的海胆聚集状ZnO纳米结构显示出具有宽弯曲角度的高密度ZnO纳米棒，这导致光致发光强度大幅增加，并且在400 - 900 nm波长范围内具有大于70%的高透光率雾度比以及高总透光率。还研究了水滴在样品表面的接触角。
