Characterization of Multi-scale Morphology and Superhydrophobicity of Water Bamboo Leaves and Biomimetic Polydimethylsiloxane (PDMS) Replicas

Guan, Huiying; Han, Zhiwu; Cao, Hui-Na; Niu, Shichao; Qian, Zhihui; Ye, Junfeng; Ren, Luquan

doi:10.1016/s1672-6529(14)60152-9

Cited by 31 publications

(20 citation statements)

References 38 publications

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“…Until now, there are several successful water‐TENGs and most of them require micro‐/nanostructures and hydrophobic surface to maximize the performance output. Interestingly, these two typical characteristics of high‐density microstructures and hydrophobic (low surface energy) surface are analogically similar to structural and surficial properties in water‐repellent leaves, such as bamboo leaves and lotus leaves, whose surfaces consist of hierarchical surface structures with a dense coating of low‐surface‐energy waxing. This structural and chemical combination of hydrophobic leaves stem from long‐term adaptation and evolution in semiaquatic environments.…”

Section: Materials Parameters For Aluminummentioning

confidence: 89%

Large‐Area Direct Laser‐Shock Imprinting of a 3D Biomimic Hierarchical Metal Surface for Triboelectric Nanogenerators

et al. 2018

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Ongoing efforts in triboelectric nanogenerators (TENGs) focus on enhancing power generation, but obstacles concerning the economical and cost-effective production of TENGs continue to prevail. Micro-/nanostructure engineering of polymer surfaces has been dominantly utilized for boosting the contact triboelectrification, with deposited metal electrodes for collecting the scavenged energy. Nevertheless, this state-of-the-art approach is limited by the vague potential for producing 3D hierarchical surface structures with conformable coverage of high-quality metal. Laser-shock imprinting (LSI) is emerging as a potentially scalable approach for directly surface patterning of a wide range of metals with 3D nanoscale structures by design, benefiting from the ultrahigh-strain-rate forming process. Here, a TENG device is demonstrated with LSI-processed biomimetic hierarchically structured metal electrodes for efficient harvesting of water-drop energy in the environment. Mimicking and transferring hierarchical microstructures from natural templates, such as leaves, into these water-TENG devices is effective regarding repelling water drops from the device surface, since surface hydrophobicity from these biomicrostructures maximizes the TENG output. Among various leaves' microstructures, hierarchical microstructures from dried bamboo leaves are preferable regarding maximizing power output, which is attributed to their unique structures, containing both dense nanostructures and microscale features, compared with other types of leaves. Also, the triboelectric output is significantly improved by closely mimicking the hydrophobic nature of the leaves in the LSI-processed metal surface after functionalizing it with low-surface-energy self-assembled-monolayers. The approach opens doors to new manufacturable TENG technologies for economically feasible and ecologically friendly production of functional devices with directly patterned 3D biomimic metallic surfaces in energy, electronics, and sensor applications.

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Section: Materials Parameters For Aluminummentioning

confidence: 89%

Large‐Area Direct Laser‐Shock Imprinting of a 3D Biomimic Hierarchical Metal Surface for Triboelectric Nanogenerators

et al. 2018

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“…The Koch's two‐step bioreplication method has been successful in replicating several high aspect ratio structures (HARS) . However the replication resolution was very low for interconnected platelet shaped HARS.…”

Section: Resultsmentioning

confidence: 99%

Characterization and Bioreplication of Tradescantia pallida Inspired Biomimetic Superwettability for Dual Way Patterned Water Harvesting

Suvindran

Pan

et al. 2018

Adv Materials Inter

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Biomimicry elucidates nature's faultless synchronization of structure with function inspiring researchers to create designs that can achieve maximum performance with minimalistic resource exhaustion. Nature has evolved the invasive species Tradescantia pallida (T. pallida) with the ability to survive in drought lands. Since this species requires humidity to survive in those conditions it can be inferred that the T. pallida partakes of foliar atmospheric water harvesting. Herein, the wettability is tested with the study establishing that the leaf exhibits para‐hydrophobicity while demonstrating a static contact angle of 165°, whereas the morphological characterization reveals a complex hierarchical sculpturing with macroscale trichomes and parallel venations. Moreover, it is identified that the foliar water uptake occurs via the para‐hydrophobic surface and the hydrophobic trichomes subsequently guiding the water along the parallel channels creating a leaf that has an efficient dual way water harvesting system. These features render it capable of surviving in any habitat that validates nature's perfect unification of structure and function. Such multifunctional surfaces are a rarity thereby making them desirable for smart water harvesting designs. Thus inspired, a replica is developed which mimics the wettability with functional artificial trichomes and a potential dual way patterned water harvesting concept is presented.

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“…Artificial superhydrophobic materials have been synthesized successfully by simulating biological surfaces in nature. For example, Guan et al [ 48 ] obtained a superhydrophobic surface of which the WCA and WSA are 151 ± 2° and 4–6° respectively by duplicating surface morphologies of the water bamboo leaf using polydimethylsiloxane (PDMS). Yeh's groups adopted Xanthosoma sagittifolium leaves with a WCA of 146° as templates to prepare a superhydrophobic surface showing a WCA of 153° on a cold‐rolled steel substrate using nanocasting techniques.…”

Section: Superhydrophobic Surfacesmentioning

confidence: 99%

Chemical Fabrication Strategies for Achieving Bioinspired Superhydrophobic Surfaces with Micro and Nanostructures: A Review

Wang

2020

Adv Eng Mater

102

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Characterization of Multi-scale Morphology and Superhydrophobicity of Water Bamboo Leaves and Biomimetic Polydimethylsiloxane (PDMS) Replicas

Cited by 31 publications

References 38 publications

Large‐Area Direct Laser‐Shock Imprinting of a 3D Biomimic Hierarchical Metal Surface for Triboelectric Nanogenerators

Large‐Area Direct Laser‐Shock Imprinting of a 3D Biomimic Hierarchical Metal Surface for Triboelectric Nanogenerators

Characterization and Bioreplication of Tradescantia pallida Inspired Biomimetic Superwettability for Dual Way Patterned Water Harvesting

Chemical Fabrication Strategies for Achieving Bioinspired Superhydrophobic Surfaces with Micro and Nanostructures: A Review

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