Superhydrophobicity in perfection: the outstanding properties of the lotus leaf

Ensikat, Hans J.; Ditsche-Kuru, Petra; Neinhuis, Christoph; Barthlott, Wilhelm

doi:10.3762/bjnano.2.19

Cited by 628 publications

(455 citation statements)

References 28 publications

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“…Steel, an American military surgeon, first proposed the concept of Bionics in 1960 [1][2][3][4] . In 1998, the United States published a monograph on the use of bionics bionics Benyus [5] new term (Biomimicry). Bionics is the imitation of biological science, which studies of biological systems, structure, material, function, energy conversion, information control features, and its application in technology system, to improve the existing technology and engineering equipment, the creation process, the new building automation.…”

Section: Test Equipment and Methodsmentioning

confidence: 99%

“…This phenomenon is called lotus effect (Lotus-Effect)". The current international research on lotus effect has made many important theoretical results [1][2][3][4][5] ; in the application, "superhydrophobic" products have all kinds of imitation lotus market, such as oil and water repellent fabric, lotus effect latex paint, waterproof paint, hydrophobic film, self cleaning glass and so on [6][7] . The super hydrophobic and self-cleaning function of lotus leaf has aroused great interest of scientists and engineers.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Super Hydrophobic Mechanism of Several Typical Plant Leaves

Sun¹,

Xu²

2017

Proceedings of the 7th International Conference on Education, Management, Information and Mechanical Engineering (EMIM 2017)

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Abstract. Through the observation of the typical plant lotus leaf, rice and nasturtium etc leaf surface wettability, the leaf surface structure of scanning electron microscope, contact angle measurement, self cleaning mechanism of comparative study of typical plant leaf surface structure, clarifying the typical super hydrophobic plant surface wettability difference and its origin. The results showed that the leaf surface of the three kinds of plants had both micro -and nano -surface microstructure, and all of them showed super hydrophobicity. The microscopic morphology is composed of a micron scale mastoid substrate, which is covered with a nano scale waxy fluff, so that the water droplets can not be completely immersed into the substrate and exhibit the super hydrophobic property. The contact angle measurement results prove this point. But unlike the other two is that the super hydrophobic properties of rice leaves are anisotropic, rice leaf surface parallel to the edge of the mastoid leaf direction showed ordered one-dimensional, arbitrary in the vertical direction, water droplets in the rice leaf surface is easy to flow in parallel along the leaf edge direction. The study on the mechanism of wettability of the typical plant leaf surface provides an idea for the development of the surface structure and the preparation of superhydrophobic surface.

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Section: Test Equipment and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of Super Hydrophobic Mechanism of Several Typical Plant Leaves

Sun¹,

Xu²

2017

Proceedings of the 7th International Conference on Education, Management, Information and Mechanical Engineering (EMIM 2017)

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“…The fixation of the fresh leaves was done using glutaraldehyde and any water content was replaced by glycerol using literature reports [29].…”

Section: Fabrication Of Sers Substratesmentioning

confidence: 99%

Sensitive Detection of Biomolecules by Surface Enhanced Raman Scattering using Plant Leaves as Natural Substrates

Sharma

Krishnan

2017

EPJ Web Conf.

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Abstract. Detection of biomolecules is highly important for biomedical and other biological applications. Although several methods exist for the detection of biomolecules, surface enhanced Raman scattering (SERS) has a unique role in greatly enhancing the sensitivity. In this work, we have demonstrated the use of natural plant leaves as facile, low cost and eco-friendly SERS substrates for the sensitive detection of biomolecules. Specifically, we have investigated the influence of surface topography of five different plant leaf based substrates, deposited with Au, on the SERS performance by using L-cysteine as a model biomolecule. In addition, we have also compared the effect of sputter deposition of Au thin film with dropcast deposition of Au nanoparticles on the leaf substrates. Our results indicate that L-cysteine could be detected with high sensitivity using these plant leaf based substrates and the leaf possessing hierarchical micro/nanostructures on its surface shows higher SERS enhancement compared to a leaf having a nearplanar surface. Furthermore, leaves with drop-casted Au nanoparticle clusters performed better than the leaves sputter deposited with a thin Au film.

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“…For example, the presence of galls or trichomes on a leaf surface may have a significant impact on changes in the leaf surface roughness and therefore on its wettability (Koch et al 2006;Bhushan and Jung 2010;Ensikat et al 2011;Khayet and Fernández 2012). The pH, chemical composition of waxes, and presence of microflora can affect the wettability (Knoll and Schreiber 2000).…”

Section: Introductionmentioning

confidence: 99%

Contact angle measurements and water drop behavior on leaf surface for several deciduous shrub and tree species from a temperate zone

Papierowska

Szporak-Wasilewska

Szewińska

et al. 2018

Trees

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Key message Leaf CA measurement should take into account angle variation during measurement time. Leaf wettability of common deciduous forest plants is characterized by wetting contact angles ranging from 60° to 140° with a significant variation between species of the same family. Abstract Leaf wettability is an important phenomenon that has an influence on several processes such as the hydrological cycle, plant pathogen growth, or pollutant and pesticide absorption/deposition. The main objective of this research was to investigate the leaf wettability differences of 19 species (16 trees and 3 shrubs) of deciduous plants commonly occurring in Polish forests (temperate climate). The measurements were gathered as follows: 20 undamaged leaves were selected for each species and the wettability was determined by contact angle measurements with an optical goniometer CAM 100 using the sessile drop method. The contact angle was measured with 1-s intervals during 2 min from droplet deposition on adaxial and abaxial leaf surface. Laboratory analyses were completed during the summer of 2016 during full vegetation growth. A general CA decrease with time was observed on both leaf sides. The contact angle values ranged from 60° to 140° depending on species and leaf side. Differences between contact angle values at the beginning and the end of measurement reached 23.6° and engendered changes of wetting classes for some species. In many cases, no wettability class change was observed despite a CA lowering of 20°. The abaxial side was found to be the more repellent for 14 out of 19 species. Altogether, the leaves were classified from highly wettable to highly non-wettable, probably depending on the plant-survival strategy.

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Superhydrophobicity in perfection: the outstanding properties of the lotus leaf

Cited by 628 publications

References 28 publications

Comparison of Super Hydrophobic Mechanism of Several Typical Plant Leaves

Comparison of Super Hydrophobic Mechanism of Several Typical Plant Leaves

Sensitive Detection of Biomolecules by Surface Enhanced Raman Scattering using Plant Leaves as Natural Substrates

Contact angle measurements and water drop behavior on leaf surface for several deciduous shrub and tree species from a temperate zone

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