The aim of this paper is to characterize the microrelief and wettability of lotus leaf, waterlily leaf and biomimic ZnO surface with potential engineering applications. The characterizations of morphologies reveal tha...The aim of this paper is to characterize the microrelief and wettability of lotus leaf, waterlily leaf and biomimic ZnO surface with potential engineering applications. The characterizations of morphologies reveal that the top surface of lotus leaf is textured with 4 μm - 10 μm size protrusions and 70 nm - 100 nm nanorods, while the top surface of waterlily leaf is textured with wrinkle and decorated with concave coin-shaped geometric structure. The wettabilities of water and oil on lotus leaf and waterlily leaf under different surroundings were systematically researched. It is indeed interesting that the leaves of the two typical plants both living in the aquatic habitats possess opposite wettabilities： superhydrophobicity for top surface of lotus leaf （156°） while quasi-superhydrophilicity for top surface of waterlily leaf （15°）. We have succeeded in fabricating the superhy- drophobic ZnO nanorods semiconductor material （151°） employing a simple method inspired by the detailed structures and chemical composition of lotus leaf.展开更多
The wettability of solid surfaces has attracted extensive interest in both theoretical research and industrial applications. This paper reviews recent research progress in the fabrication and applications of the collo...The wettability of solid surfaces has attracted extensive interest in both theoretical research and industrial applications. This paper reviews recent research progress in the fabrication and applications of the colloidal crystals with special wettability. Based on the modified equation of Wenzel and Cassie, the colloidal crystals with special wettability have been obtained by either application of the intrinsic rough structure or modification of the surface chemical composition. Some typical applications of colloidal crystals with special wettability have also been demonstrated.展开更多
With the explosive growth of the world's population and the rapid increase in industrial water consumption,the world's water supply has fallen into crisis.The shortage of fresh water resources has become a glo...With the explosive growth of the world's population and the rapid increase in industrial water consumption,the world's water supply has fallen into crisis.The shortage of fresh water resources has become a global problem,especially in arid regions.In nature,many organisms can collect water from foggy water under harsh conditions,which provides us with inspiration for the development of new functional fog harvesting materials.A large number of bionic special wettable synthetic surfaces are synthesized for water mist collection.In this review,we introduce some water collection phenomena in nature,outline the basic theories of biological water harvesting,and summarize six mechanisms of biological water collection:increased surface wettability,increased water transmission area,long-distance water delivery,water accumulation and storage,condensation promotion,and gravity-driven.Then,the water collection mechanisms of three typical organisms and their synthesis are discussed.And their function,water collection efficiency,new developments in their biomimetic materials are narrated,which are cactus,spider and desert beetles.The study of multiple bionics was inspired by the discovery of Nepenthes,moist and smooth peristome.The excellent characteristics of a variety of biological water collection structures,combined with each other,are far superior to other single synthetic surfaces.Furthermore,the main problems in the preparation and application of biomimetic fog harvesting materials and the future development trend of materials fog harvesting are prospected.展开更多
基金This work is supported by the National Nature Science Foundation of China （Grant Nos. 11172301 and 21203217）, the “Funds for Distinguished Young Scien- tists” of Hubei Province （No. 2012FFA002）, the“Western Light Talent Culture” Project, the Co-joint Project of Chinese Academy of Sciences, and the “Top Hundred Talents” Program of Chinese Academy of Sciences.
文摘The aim of this paper is to characterize the microrelief and wettability of lotus leaf, waterlily leaf and biomimic ZnO surface with potential engineering applications. The characterizations of morphologies reveal that the top surface of lotus leaf is textured with 4 μm - 10 μm size protrusions and 70 nm - 100 nm nanorods, while the top surface of waterlily leaf is textured with wrinkle and decorated with concave coin-shaped geometric structure. The wettabilities of water and oil on lotus leaf and waterlily leaf under different surroundings were systematically researched. It is indeed interesting that the leaves of the two typical plants both living in the aquatic habitats possess opposite wettabilities： superhydrophobicity for top surface of lotus leaf （156°） while quasi-superhydrophilicity for top surface of waterlily leaf （15°）. We have succeeded in fabricating the superhy- drophobic ZnO nanorods semiconductor material （151°） employing a simple method inspired by the detailed structures and chemical composition of lotus leaf.
基金support of the National Natural Science Foundation of China (Grant Nos. 50625312, U0634004, 50973117, 20721061 and 20601005)the 973 Program (Nos. 2006CB806200, 2006CB932100, 2006CB9321706 and 2007CB936403)the Chinese Academy of Sci-ences (No. KJCX-2-YW-M11)
文摘The wettability of solid surfaces has attracted extensive interest in both theoretical research and industrial applications. This paper reviews recent research progress in the fabrication and applications of the colloidal crystals with special wettability. Based on the modified equation of Wenzel and Cassie, the colloidal crystals with special wettability have been obtained by either application of the intrinsic rough structure or modification of the surface chemical composition. Some typical applications of colloidal crystals with special wettability have also been demonstrated.
基金This work is supported by the National Nature Science Foundation of China(No.51735013).
文摘With the explosive growth of the world's population and the rapid increase in industrial water consumption,the world's water supply has fallen into crisis.The shortage of fresh water resources has become a global problem,especially in arid regions.In nature,many organisms can collect water from foggy water under harsh conditions,which provides us with inspiration for the development of new functional fog harvesting materials.A large number of bionic special wettable synthetic surfaces are synthesized for water mist collection.In this review,we introduce some water collection phenomena in nature,outline the basic theories of biological water harvesting,and summarize six mechanisms of biological water collection:increased surface wettability,increased water transmission area,long-distance water delivery,water accumulation and storage,condensation promotion,and gravity-driven.Then,the water collection mechanisms of three typical organisms and their synthesis are discussed.And their function,water collection efficiency,new developments in their biomimetic materials are narrated,which are cactus,spider and desert beetles.The study of multiple bionics was inspired by the discovery of Nepenthes,moist and smooth peristome.The excellent characteristics of a variety of biological water collection structures,combined with each other,are far superior to other single synthetic surfaces.Furthermore,the main problems in the preparation and application of biomimetic fog harvesting materials and the future development trend of materials fog harvesting are prospected.
