Superhydrophobicity in perfection: the outstanding properties of the lotus leaf

Beilstein Journal of Nanotechnology - Tập 2 - Trang 152-161
Hans J. Ensikat1, Petra Ditsche‐Kuru, Christoph Neinhuis, Wilhelm Barthlott
1Nees Institute, University of Bonn, Meckenheimer Allee 170, 53115 Bonn, Germany.

Tóm tắt

Lotus leaves have become an icon for superhydrophobicity and self-cleaning surfaces, and have led to the concept of the ‘Lotus effect’. Although many other plants have superhydrophobic surfaces with almost similar contact angles, the lotus shows better stability and perfection of its water repellency. Here, we compare the relevant properties such as the micro- and nano-structure, the chemical composition of the waxes and the mechanical properties of lotus with its competitors. It soon becomes obvious that the upper epidermis of the lotus leaf has developed some unrivaled optimizations. The extraordinary shape and the density of the papillae are the basis for the extremely reduced contact area between surface and water drops. The exceptional dense layer of very small epicuticular wax tubules is a result of their unique chemical composition. The mechanical robustness of the papillae and the wax tubules reduce damage and are the basis for the perfection and durability of the water repellency. A reason for the optimization, particularly of the upper side of the lotus leaf, can be deduced from the fact that the stomata are located in the upper epidermis. Here, the impact of rain and contamination is higher than on the lower epidermis. The lotus plant has successfully developed an excellent protection for this delicate epistomatic surface of its leaves.

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Tài liệu tham khảo

Barthlott, 1992, Klima- und Umweltforschung an der Universität Bonn, 117

10.1007/s004250050096

10.1002/biuz.960280507

Bhushan, 2010, Springer Handbook of Nanotechnology, 3, 1437, 10.1007/978-3-642-02525-9_42

10.1007/BF00386362

10.1002/ps.2780010411

10.1006/anbo.1997.0400

10.1021/la802351h

10.1093/jxb/erg127

Barthlott, 1996, Flora (Jena), 191, 169, 10.1016/S0367-2530(17)30709-0

10.1016/j.chemphyslip.2006.06.016

10.1021/la9017536

10.1039/b807857b

10.1088/0957-4484/17/5/032

10.1021/la8024233

10.1021/la102566c

10.1007/s10867-010-9192-6

Mazliak, 1968, Progress in Phytochemistry, Vol. 1, 49

10.1002/jsfa.2740200214

10.1021/la104018k

10.1016/j.micron.2007.11.010

Varanasi, 2009, Nanotechnology 2009: Biofuels, Renewable Energy, Coatings, Fluidics and Compact Modeling, 3, 184

10.2136/sssaj1987.03615995005100050038x

10.1002/adma.201090075

10.1098/rsta.2009.0022

10.1016/S0065-2806(07)34003-4

10.1002/jmor.10921

Ensikat, 2010, Microscopy: Science, Technology, Applications and Education, 1, 248

Robinson, 1985, Präparationsmethodik in der Elektronenmikroskopie, 10.1007/978-3-662-09413-6

10.1086/314234

10.1021/cg060035w

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Thông tin xuất bản

Beilstein Journal of Nanotechnology

Tập 2

152-161

Thông tin tác giả