Recent Advances in Nanostructured Biomimetic Dry Adhesives

The relatively large size of the gecko and its ability to climb a multitude of structures with ease has often been cited as the inspiration upon which the field of dry adhesives is based. Since 2010, there have been many advances in the field of dry adhesives with much of the new research focusing on developing nanoscale and hierarchical features in a concentrated effort to develop synthetic gecko-like dry adhesives which are strong, durable, and self-cleaning. A brief overview of the geckos and the hairs which it uses to adhere to many different surfaces is provided before delving into the current methods and materials used to fabricate synthetic gecko hairs. A summary of the recently published literature on bio-inspired, nanostructured dry adhesives is presented with an emphasis being placed on fabrication techniques.

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[12]  N. Larsen,et al.  Injection molding of high aspect ratio sub-100 nm nanostructures , 2013 .

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[19]  W. Shih,et al.  Fabrication and characterization of e-beam photoresist array for biomimetic self-cleaning dry adhesives , 2011 .

[20]  K. Suh,et al.  Precise tip shape transformation of nanopillars for enhanced dry adhesion strength , 2012 .

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[22]  C Majidi,et al.  Effective elastic modulus of isolated gecko setal arrays , 2006, Journal of Experimental Biology.

[23]  Roger D. Quinn,et al.  A Robot that Climbs Walls using Micro-structured Polymer Feet , 2005, CLAWAR.

[24]  Kenji Fukuda,et al.  Ordered Metal Nanohole Arrays Made by a Two-Step Replication of Honeycomb Structures of Anodic Alumina , 1995, Science.

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[26]  Matthias Worgull,et al.  3D direct laser writing of nano- and microstructured hierarchical gecko-mimicking surfaces. , 2012, Small.

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[28]  S. Gorb,et al.  Biomimetic mushroom-shaped fibrillar adhesive microstructure , 2007, Journal of The Royal Society Interface.

[29]  Kahp Y. Suh,et al.  Nanohairs and nanotubes: Efficient structural elements for gecko-inspired artificial dry adhesives , 2009 .

[30]  Victor Samper,et al.  Fabrication of a gecko-like hierarchical fibril array using a bonded porous alumina template , 2007 .

[31]  R. Full,et al.  Evidence for van der Waals adhesion in gecko setae , 2002, Proceedings of the National Academy of Sciences of the United States of America.

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[33]  Kahp Y. Suh,et al.  Bio-inspired slanted polymer nanohairs for anisotropic wetting and directional dry adhesion , 2010 .

[34]  Sang Heup Moon,et al.  Effect of leaning angle of gecko-inspired slanted polymer nanohairs on dry adhesion , 2010 .

[35]  Kimberly L. Turner,et al.  A batch fabricated biomimetic dry adhesive , 2005 .

[36]  Sriram Natarajan,et al.  Shear Adhesion Strength of Gecko-Inspired Tapes on Surfaces with Variable Roughness , 2013 .

[37]  Metin Sitti,et al.  Enhanced fabrication and characterization of gecko-inspired mushroom-tipped microfiber adhesives , 2013 .

[38]  Mark R. Cutkosky,et al.  Smooth Vertical Surface Climbing With Directional Adhesion , 2008, IEEE Transactions on Robotics.

[39]  Moon Kyu Kwak,et al.  Stretchable, adhesion-tunable dry adhesive by surface wrinkling. , 2010, Langmuir : the ACS journal of surfaces and colloids.

[40]  K. Autumn,et al.  Evidence for self-cleaning in gecko setae. , 2005, Proceedings of the National Academy of Sciences of the United States of America.

[41]  K. Suh,et al.  A nontransferring dry adhesive with hierarchical polymer nanohairs , 2009, Proceedings of the National Academy of Sciences.