Transparent silica thin films prepared from sodium silicate and bovine serum albumin with petal effect |
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| Affiliation: | 1. National Institute of Advanced Industrial Science and Technology (Kansai center), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan;2. Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan;1. School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, PR China;2. Department of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;1. Hunan Key Laboratory of Micro–Nano Energy Materials and Devices, Xiangtan University, Hunan 411105, PR China;2. Laboratory for Quantum Engineering Micro–Nano Energy Technology, School of Physics and Optoelectronics, Xiangtan University, Hunan 411105, PR China;1. School of Materials Science and Engineering, Xi?an University of Technology, Xi?an 710048, China;2. Shaanxi Province Thin Film Technology and Optical Test Open Key Laboratory, School of Photoelectrical Engineering, Xi?an Technological University, Xi?an 710032, China;3. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi?an 710072, China;1. Escola Técnica de Saúde, Universidade Federal da Paraíba, Cidade Universitária, João Pessoa CEP 58051-900, PB, Brazil;2. Departamento de Engenharia de Materiais, Universidade Federal de Campina Grande, Av. Aprígio Veloso 882, Catolé, Campina Grande CEP 58 429-900, PB, Brazil;3. Departamento de Engenharia de Materiais, Universidade Federal da Paraíba, Cidade Universitária, João Pessoa CEP 58051-900, PB, Brazil |
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| Abstract: | A variety of advanced functions such as hydrophilicity and hydrophobicity are required for transparent glass plates recently. This paper reports a new procedure to produce transparent silica thin films on glass plates obtained from sodium silicate as inexpensive silica source by its dip coating and subsequent deposition of silica with (NH4)2SO4 solution. When the thin films were prepared using bovine serum albumin (BSA), the resulting transparent films became more hydrophobic than that obtained without BSA and had good adhesion with water droplet, the so-called “petal effect”. Water droplet on the silica thin film did not slide down even when the substrate turned vertically and upside down. Although no BSA was included in the silica thin film, BSA contributed to the formation of nano-sized asperity structures in the film, producing more hydrophobic (less hydrophilic) property and the petal effect. |
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| Keywords: | Silica Transparent thin film Sodium silicate Bovine serum albumin Petal effect |
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