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Superhydrophobicity of LaMnO3 Coatings with Hierarchical Microstructures |
| CHEN Jie-Fei1,2;XIAO Wen-Jia1,2;LI Da1;YANG Yang-Yi3;HE Zhen-Hui 1,2 |
| 1State Key Laboratory of Optoelectronic Materials and Technology, Sun Yat-sen University, Guangzhou 5102752School of Physics and Engineering, Sun Yat-sen University, Guangzhou 5102753School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275 |
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| Cite this article: |
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CHEN Jie-Fei, XIAO Wen-Jia, LI Da et al 2008 Chin. Phys. Lett. 25 747-750 |
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Abstract As proposed by Herminghaus, a hierarchical structure could render any surface nonwettable as long as the roughness amplitude at small scales is sufficient to suspend a free liquid surface. Recently we reported that the wettability of La0.7Sr0.3MnO3, an intrinsic hydrophilic oxide, can be tuned from superhydrophilicity to superhydrophobicity by hierarchical microstructures generated by annealing the coatings of La0.7Sr0.3MnO3 powder in nanometric scale at different temperatures. Here we further demonstrate the similar phenomenon observed on LaMnO3 coatings, which conforms THAT the surface
geometrical structure is a key factor to determine the wettability.
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| Keywords:
81.65.-b
81.16.Rf
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Received: 05 December 2007
Published: 30 January 2008
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| PACS: |
81.65.-b
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(Surface treatments)
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81.16.Rf
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(Micro- and nanoscale pattern formation)
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