Wet and Dry Adhesion Properties of Self‐Selective Nanowire Connectors

Here, the wet and dry adhesion properties of hybrid Ge/parylene nanowire (NW) connectors are examined. The ability of the NW connectors to bind strongly even under lubricating conditions, such as mineral oil, sheds light on the dominant role of van der Waals interactions in the observed adhesion. The superhydrophobic surface of the NW connectors enables the wet, self-cleaning of contaminant particles from the surface, similar to the lotus effect. In addition, the effect of NW length on the shear adhesion strength, repeated usability, and robustness of the connectors, all critical properties for applications that require reversible binding of components, is examined.

[1]  M. Meyyappan,et al.  Interfacial energy and strength of multiwalled-carbon-nanotube-based dry adhesive , 2006 .

[2]  R. Pogreb,et al.  Cassie-Wenzel wetting transition in vibrating drops deposited on rough surfaces: is the dynamic Cassie-Wenzel wetting transition a 2D or 1D affair? , 2007, Langmuir : the ACS journal of surfaces and colloids.

[3]  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.

[4]  R. Rosenfeld Nature , 2009, Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery.

[5]  Pulickel M. Ajayan,et al.  Carbon nanotube-based synthetic gecko tapes , 2007, Proceedings of the National Academy of Sciences.

[6]  R. Full,et al.  Adhesive force of a single gecko foot-hair , 2000, Nature.

[7]  R. Blossey Self-cleaning surfaces — virtual realities , 2003, Nature materials.

[8]  Jing Kong,et al.  Superwetting nanowire membranes for selective absorption. , 2008, Nature nanotechnology.

[9]  W. Barthlott,et al.  Purity of the sacred lotus, or escape from contamination in biological surfaces , 1997, Planta.

[10]  Metin Sitti,et al.  Adhesion and anisotropic friction enhancements of angled heterogeneous micro-fiber arrays with spherical and spatula tips , 2007 .

[11]  Toh-Ming Lu,et al.  Chemical Vapor Deposition Polymerization: The Growth and Properties of Parylene Thin Films , 2003 .

[12]  J. Engel,et al.  Two-Dimensional Micromachined Flow Sensor Array for Fluid Mechanics Studies , 2003 .

[13]  Liangti Qu,et al.  Gecko‐Foot‐Mimetic Aligned Single‐Walled Carbon Nanotube Dry Adhesives with Unique Electrical and Thermal Properties , 2007 .

[14]  Ralph Spolenak,et al.  Evidence for capillarity contributions to gecko adhesion from single spatula nanomechanical measurements. , 2005, Proceedings of the National Academy of Sciences of the United States of America.

[15]  Marcel Dijkstra,et al.  MEMS based hair flow-sensors as model systems for acoustic perception studies , 2006, Nanotechnology.

[16]  Yasuaki Seki,et al.  Biological materials: Structure and mechanical properties , 2008 .

[17]  Zhiyong Fan,et al.  Wafer-scale assembly of highly ordered semiconductor nanowire arrays by contact printing. , 2008, Nano letters.

[18]  H. Butt,et al.  Force measurements with the atomic force microscope: Technique, interpretation and applications , 2005 .

[19]  Robert Langer,et al.  A biodegradable and biocompatible gecko-inspired tissue adhesive , 2008, Proceedings of the National Academy of Sciences.

[20]  Toh-Ming Lu,et al.  Chemical Vapor Deposition Polymerization , 2004 .

[21]  A. Geim,et al.  Microfabricated adhesive mimicking gecko foot-hair , 2003, Nature materials.

[22]  Hyunhyub Ko,et al.  Hybrid core-shell nanowire forests as self-selective chemical connectors. , 2009, Nano letters.

[23]  J. Gilman,et al.  Nanotechnology , 2001 .

[24]  Bruce P. Lee,et al.  A reversible wet/dry adhesive inspired by mussels and geckos , 2007, Nature.

[25]  Clément Sanchez,et al.  Biomimetism and bioinspiration as tools for the design of innovative materials and systems , 2005, Nature materials.

[26]  Liangti Qu,et al.  Carbon Nanotube Arrays with Strong Shear Binding-On and Easy Normal Lifting-Off , 2008, Science.