Functional Nanomaterials Laboratory, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences (CAS), Haidianqu, Beijing, China.
ACS Appl Mater Interfaces. 2012 Apr;4(4):2204-11. doi: 10.1021/am3002082. Epub 2012 Apr 5.
Raspberry- and mulberry-like hierarchically structured silica particulate coatings were fabricated via facile in situ layer-by-layer assembly with monodisperse silica nanoparticles (NPs) of two different sizes followed by calcination. Raspberry-like and mulberry-like silica particulate coatings were achieved when the size ratio of two silica particles was 20/200 and 20/70 nm, respectively. The latter coating exhibited good antireflective property. Its maximum transmittance reached as high as 97%, whereas that of the glass substrate is only 91%. The morphologies of the coatings were observed by scanning electron microscopy and atom force microscopy. The surface properties of these coatings were investigated by measuring their water contact angles and the spreading time of water droplet. The results showed that such hierarchically structured coatings had superhydrophilic and antifogging properties.
通过简单的原位层层组装，使用两种不同尺寸的单分散二氧化硅纳米颗粒 (NPs)，然后进行煅烧，制备出树莓状和桑椹状分层结构的硅粒子涂层。当两种硅粒子的尺寸比为 20/200 和 20/70nm 时，分别得到树莓状和桑椹状硅粒子涂层。后者的涂层具有良好的抗反射性能。其最大透光率高达 97%，而玻璃基底的透光率仅为 91%。通过扫描电子显微镜和原子力显微镜观察了涂层的形貌。通过测量水接触角和液滴铺展时间来研究这些涂层的表面性能。结果表明，这种分层结构的涂层具有超亲水和防雾性能。
