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Updated: Jun 21, 2026
TiO2-coated Hollow Glass Microspheres with Superhydrophobic and High IR-reflective Properties Synthesized by a Soft-chemistry Method
Published on: April 26, 2017
Bioinspired preparation of ultrathin SiO(2) shell on ZnO nanowire array for ultraviolet-durable superhydrophobicity
Lingling Wang1, Xintong Zhang, Yang Fu
1Center for Advanced Optoelectronic Functional Materials Research, and Key Laboratory for UV-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun 130024, People's Republic of China.
Abstract:
ZnO nanowire (NW) array was conformally coated with an ultrathin SiO(2) shell by a bioinspired layer-by-layer deposition in order to obtain ultraviolet (UV)-durable superhydrophobic property. Uniform SiO(2) shell was prepared on ZnO NW by alternative reactive deposition of polyethylenimine and silicic acid. Despite the highly curved morphology of ZnO NW array, the thickness of SiO(2) shell increased linearly with the number of deposition cycles, with a thickness increment being of approximately 4.17 nm per deposition cycle. The SiO(2) shell only had a slight influence on the superhydrophobic property of ZnO NW array after modification with a monolayer of octadecyltrimethoxysilane (OTS). However, it greatly improved the UV durability of the superhydrophobic property of ZnO NW array due to the confinement effect of insulating SiO(2) layer on the photogenerated electron-hole pairs in ZnO NW.
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