Mimicking a gecko’s foot with strong adhesive strength based on a spinnable vertically aligned carbon nanotube array

Cui, Yanbin; Ju, Yang; Xu, Baiyao; Wang, Peng; Kojima, Noboru; Ichioka, Kazuma; Hosoi, Atsushi

doi:10.1039/c3ra46113k

Cited by 20 publications

(18 citation statements)

References 21 publications

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“…During shear movement, the contact area of VACNT with target surface could be side contact, which is obviously larger than point contact during normal movement [18]. From the past research results, it is easy to conclude that the shear adhesive performance of VACNT is usually stronger than normal adhesive performance, exhibiting strong adhesion and easy detachment [19][20][21].…”

Section: Introductionmentioning

confidence: 95%

Effect of Hydrogen Concentration on the Growth of Carbon Nanotube Arrays for Gecko-Inspired Adhesive Applications

Duan

et al. 2017

Coatings

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Vertically-aligned carbon nanotubes (VACNTs) have extraordinary structural and mechanical properties, and have been considered as potential candidates for creating dry adhesives inspired by adhesive structures in nature. Catalytic chemical vapor deposition is widely used to grow VACNTs; however, the influential mechanism of VACNT preparation parameters (such as H 2 concentration) on its adhesion property is not clear, making accurate control over the structure of VACNTs adhesive an ongoing challenge. In this article, we use electron beam-deposited SiO 2 /Al 2 O 3 as a support layer, Fe as catalyst, and C 2 H 4 /H 2 gas mixtures as a feed gas to prepare VACNTs, while varying the ratio of the reducing atmosphere (H 2 ) from 0% to 35%. VACNTs synthesized at a 15% H 2 concentration (5 mm × 5 mm in size) can support a maximal weight of 856 g, which indicates a macroscopic shear adhesive strength of 34 N/cm 2 . We propose a hydrogen-concentration-dependent model for the shear adhesive performance of VACNTs. By adjusting the amount of hydrogen present during the reaction, the morphology and quality of the prepared VACNTs can be precisely controlled, which significantly influences its shear adhesive performance. These results are advantageous for the application of carbon nanotubes as dry adhesives.

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Section: Introductionmentioning

confidence: 95%

Effect of Hydrogen Concentration on the Growth of Carbon Nanotube Arrays for Gecko-Inspired Adhesive Applications

Duan

et al. 2017

Coatings

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“…Germanium (Ge) nanowires coated in parylene have been fabricated by first chemical vapor deposition (CVD) of the Ge followed by parylene deposition, producing a highly hydrophobic and adhesive surface. Carbon nanotubes are frequently used by researchers desiring the smallest possible fiber diameter, capable of creating contact points truly on the scale of nanometers [ 152 , 153 , 154 ]. The nanotubes are thermally grown at high temperature on a specially prepared surface through chemical vapor deposition, but may be transferred via gluing to microscale fibrillar structures to create a hierarchical structure to further enhance surface compliance [ 152 ].…”

Section: Fabricationmentioning

confidence: 99%

A Review of the State of Dry Adhesives: Biomimetic Structures and the Alternative Designs They Inspire

Eisenhaure

Kim

2017

Micromachines

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Robust and inexpensive dry adhesives would have a multitude of potential applications, but replicating the impressive adhesive organs of many small animals has proved challenging. A substantial body of work has been produced in recent years which has illuminated the many mechanical processes influencing a dry adhesive interface. The especially potent footpads of the tokay gecko have inspired researchers to develop and examine an impressive and diverse collection of artificial fibrillar dry adhesives, though study of tree frogs and insects demonstrate that successful adhesive designs come in many forms. This review discusses the current theoretical understanding of dry adhesive mechanics, including the observations from biological systems and the lessons learned by recent attempts to mimic them. Attention is drawn in particular to the growing contingent of work exploring ideas which are complimentary to or an alternative for fibrillar designs. The fundamentals of compliance control form a basis for dry adhesives made of composite and “smart,” stimuli-responsive materials including shape memory polymers. An overview of fabrication and test techniques, with a sampling of performance results, is provided.

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“…这是因为随着预载荷增加, 更多的VACNTs与测试界面接触, 增大接触面积, 提高黏附强度. Cui等人 [32] [14] , 增加自支撑强度(图8(b)). 图8(c)和(e)分别 Vertically aligned carbon nanotube arrays (VACNTs) exhibit high aspect-ratios and excellent mechanical strength, and have attracted attention in the field of gecko-inspired dry adhesives.…”

Section: 化学气相沉积法(Cvd)制备vacnts因高产量、mentioning

confidence: 99%

干黏附碳纳米管垂直阵列的转移及其黏附性能评价

Luo¹,

Li²,

Yao³

et al. 2015

Chin. Sci. Bull.

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Mimicking a gecko’s foot with strong adhesive strength based on a spinnable vertically aligned carbon nanotube array

Cited by 20 publications

References 21 publications

Effect of Hydrogen Concentration on the Growth of Carbon Nanotube Arrays for Gecko-Inspired Adhesive Applications

Effect of Hydrogen Concentration on the Growth of Carbon Nanotube Arrays for Gecko-Inspired Adhesive Applications

A Review of the State of Dry Adhesives: Biomimetic Structures and the Alternative Designs They Inspire

干黏附碳纳米管垂直阵列的转移及其黏附性能评价

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