By Bharat Bhushan

ISBN-10: 3642254071

ISBN-13: 9783642254079

ISBN-10: 364225408X

ISBN-13: 9783642254086

This ebook provides an outline of the overall box of biomimetics - classes from nature. It provides a variety of examples of biomimetics, together with roughness-induced superomniphobic surfaces which offer performance of business curiosity. the main concentration within the e-book is on lotus influence, rose petal impression, shark pores and skin impact, and gecko adhesion. for every instance, the ebook first offers characterization of an item to appreciate how a traditional item offers performance, through modeling after which fabrication of constructions within the lab utilizing nature’s path to ensure one’s figuring out of nature and supply suggestions for improvement of optimal constructions. as soon as it really is understood how nature does it, examples of fabrication of optimal buildings utilizing clever fabrics and fabrication options, are offered. Examples of nature encouraged items also are offered throughout.

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11a, the macroscale profile of the net surface energy allows us to find the contact angle (corresponding to energy minimums); however, it fails to predict contact angle hysteresis and the Cassie–Baxter and Wenzel transition, which are governed by micro- and nanoscale effects. As soon as microscale substrate roughness is introduced, the droplet shape cannot be considered as an ideal truncated sphere anymore, and energy profiles have multiple energy minimums, corresponding to the location of the asperities (Fig.

3 Contact Angle Hysteresis Contact angle hysteresis is another important characteristic of a solid–liquid interface. Contact angle hysteresis occurs due to surface roughness and heterogeneity. , 2005), hysteresis cannot be eliminated completely, since even atomically smooth surfaces have a certain roughness and heterogeneity. Contact angle hysteresis is a measure of energy dissipation during the flow of a droplet along a solid surface. , 2002; Bhushan and Jung, 2007, 2008, 2011; Jung and Bhushan, 2007, 2008a) (Fig.

6) (Fig. 7c). dz=dy/2 /1=2 . 18) Gao and McCarthy (2007) Extrand (2003) Hydrophobic Hydrophilic Not changed Decreased Not changed Rough Smooth Hydrophilic Smooth Rough Hydrophobic Not changed Not changed Not changed Decreased Increased Increased Not changed Not changed Not changed Hydrophobic Hydrophilic Not changed Decreased Not changed Bhushan Rough Rough Increased Increased Increased et al. (2007) Barbieri et al. Rough Rough Increased Increased Increased (2007) For nonuniform surfaces, the results are shown for droplets larger than the islands of nonuniformity.

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Biomimetics: Bioinspired Hierarchical-Structured Surfaces for Green Science and Technology by Bharat Bhushan

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