Three-dimensional hierarchical ZnO films with lotus-leaf-like micro/nano structures were successfully fabricated via a biomimetic route combining sol-gel technique, soft lithography and hydrothermal treatments. PDMS mold replicated from a fresh lotus leaf was used to imprint microscale pillar structures directly into a ZnO sol film. Hierarchical ZnO micro/nano structures were subsequently fabricated by a low-temperature hydrothermal growth of secondary ZnO nanorod arrays on the micro-structured ZnO film. The morphology and size of ZnO hierarchical micro/nano structures can be easily controlled by adjusting the hydrothermal reaction time. Wettability of hierarchical ZnO thin films was found to convert from superhydrophilicity to hydrophobicity after a low-surface-energy fluoroalkylsilane modification. Improved wetting properties from hydrophobic to superhydrophobic can be tuned by increasing the growth of ZnO nanorods structures.
P. Seufert, S. Staiger, K. Arand, A. Bueno, M. Burghardt, und M. Riederer. Front Plant Sci, (2021)Seufert, Pascal
Staiger, Simona
Arand, Katja
Bueno, Amauri
Burghardt, Markus
Riederer, Markus
eng
Switzerland
2022/01/25
Front Plant Sci. 2022 Jan 5;12:766602. doi: 10.3389/fpls.2021.766602. eCollection 2021..
