Navigation Links
Dry adhesive based on carbon nanotubes gets stronger, with directional gripping ability
Date:10/9/2008

of Engineering at the University of Dayton. "This directional difference in the adhesion force is a significant improvement that could help make this material useful as a transient adhesive."

The key to the new material is the use of rationally-designed multi-walled carbon nanotubes formed into arrays with "curly entangled tops," said Zhong Lin Wang, a Regents' Professor in the Georgia Tech School of Materials Science and Engineering. The tops, which Wang compared to spaghetti or a jungle of vines, mimic the hierarchical structure of real gecko feet, which include branching hairs of different diameters.

When pressed onto a vertical surface, the tangled portion of the nanotubes becomes aligned in contact with the surface. That dramatically increases the amount of contact between the nanotubes and the surface, maximizing the van der Waals forces that occur at the atomic scale. When lifted off the surface in a direction parallel to the main body of the nanotubes, only the tips remain in contact, minimizing the attraction forces, Wang explained.

"The contact surface area matters a lot," he noted. "When you have line contact along, you have van der Waals forces acting along the entire length of the nanotubes, but when you have a point contact, the van der Waals forces act only at the tip of the nanotubes. That allows us to truly mimic what the gecko does naturally."

In tests done on a variety of surfaces including glass, a polymer sheet, Teflon and even rough sandpaper the researchers measured adhesive forces of up 100 Newtons per square centimeter in the shear direction. In the normal direction, the adhesive forces were 10 Newtons per square centimeter about the same as a real gecko.

The resistance to shear increased with the length of the nanotubes, while the resistance to normal force was independent of tube length.

Though the material might seem most appropriate for use by Spider-Man, the real app
'/>"/>

Contact: John Toon
jtoon@gatech.edu
404-894-6986
Georgia Institute of Technology Research News
Source:Eurekalert  

Page: 1 2 3 4

Related biology technology :

1. Spherics, Inc. Announces Sale of Novel Proprietary Bioadhesive Polymers and Oral Drug Delivery System
2. Bluestar Silicones Presents Adhesive Gels for Wound Care at Medical Grade Polymers Conference
3. CryoLifes BioGlue(R) Surgical Adhesive Receives European Approval for use in Browlift Cosmetic and Reconstructive Plastic Surgery
4. New adhesive mimics gecko toe hairs
5. CryoLife Signs Distribution Agreement for Inclusion of BioGlue(R) Surgical Adhesive in Hernia Repair Kit with Proxy Biomedical Surgical Meshes
6. ThalesNano, Inc. Forms Collaborations with Leading US Universities based on the Award Winning H-Cube(R) and H-Cube Midi(TM)
7. New Opportunities in X-Ray Based Surgical Navigation With Ziehm NaviPort 3D
8. Quota-Based Compensation Plans Outpace Ranking Plans
9. MediCult Acquires US-Based MidAtlantic Diagnostics to Further Strengthen ART Presence
10. New graphene-based material clarifies graphite oxide chemistry
11. Nucletron Announces Market Release of First Commercially Available Software to Review and Share Dicom-Based Treatment Plans for Radiotherapy
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Dry adhesive based on carbon nanotubes gets stronger, with directional gripping ability
(Date:1/14/2014)... Diego, CA (PRWEB) January 14, 2014 ... on the products of cells grown under simulated embryonic ... international license agreement with Suneva Medical, Inc. for physician-dispensed ... (CCM). , This agreement is an amendment ...
(Date:1/14/2014)... , Jan. 14, 2014 As pet owners drew up ... many of them wrote: "Take better care of my furry companion." ... designer clothes and top-brand carrying cases to take the little canine ... might also feel compelled to buy some pricey toys at the ...
(Date:1/14/2014)... 14, 2014 The largest international professional organization ... and therapeutic derivatives thereof has endorsed an educational ... about the challenges of adulterated herb and botanical ... The Society for Medicinal Plant and ...
(Date:1/14/2014)... 14, 2014 iLab Solutions, the leader in ... new Director of Product Strategy. In this role, Michelle will ... sub-teams to guide in the development of iLab products. Her ... maximum possible benefit to the scientific community by offering the ...
Breaking Biology Technology:Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 3New Year's Resolution: Give Pets the Gift of Top-Notch Health Care 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 2World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 3World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 4World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 5World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 6World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 7World's Largest Group of Medicinal Plant Researchers Endorses ABC-AHP-NCNPR Botanical Adulterants Program 8iLab Solutions Announces Michelle Detwiler as the New Director of Product Strategy 2
... - Oncolytics Biotech Inc.,("Oncolytics") (TSX:ONC, NASDAQ:ONCY) announced ... pursue a pivotal (Phase II/III) randomized trial ... refractory,patients with head and neck cancers. The ... by the Company,s Board of Directors from ...
... team up in specialty biologics development, TORONTO ... and,Therapure BioPharma Inc. have agreed to partner in ... for cancer treatments, with a goal of,advancing the ... a,marketing partner to add to its portfolio of ...
... deCODE,genetics (Nasdaq: DCGN ) today announced today that ... Qualifications Panel to present a plan for,regaining compliance ... market value of listed securities of $50 million. ... Letter from The,Nasdaq Stock Market LLC indicating that ...
Cached Biology Technology:Oncolytics Biotech Inc. Announces Decision to Pursue Phase II/III Pivotal Clinical Trial 2Therapure Biopharma Inc. announces collaboration with BioVectra Inc. 2deCODE Requests Hearing With Nasdaq Following Receipt of Staff Determination Letter 2deCODE Requests Hearing With Nasdaq Following Receipt of Staff Determination Letter 3deCODE Requests Hearing With Nasdaq Following Receipt of Staff Determination Letter 4
(Date:4/17/2014)... RIVERSIDE, Calif. One day about eight years ago, ... of California, Riverside, and her father were on a field ... stumbled upon an orchid they had never seen before. , ... authority on orchids. The orchid turned out to be ... Silveras: Lophiaris silverarum . , "Lophiaris" is the genus ...
(Date:4/17/2014)... in France have hit on a novel method ... the correct and most effective treatment possible., Kidney ... western and developing world. If left untreated, apart ... renal failure and other complications. In many patients ... Clearly a more effective pathological approach to diagnosis ...
(Date:4/17/2014)... whereby the genetic information of DNA is used ... have numerous different functions in living organisms. Messenger ... gene expression, by relating the genetic information of ... proteins. , By examining the different types ... organism at a given time, researchers can determine ...
Breaking Biology News(10 mins):Orchid named after UC Riverside researcher 2Orchid named after UC Riverside researcher 3Rapid and accurate mRNA detection in plant tissues 2
... discovery by researchers at Oregon State University, the world,s multi-billion ... This industry, that produces metal castings used in everything from ... dates back thousands of years to before Greek and Roman ... but still continues to evolve. Some modern technologies use ...
... sites across the U.S. have contaminated groundwater that requires remediation, ... meaning restoration is unlikely to be achieved in the next ... new report from the National Research Council. The report ... sites ranges from $110 billion to $127 billion, but the ...
... becomes increasingly important to know in detail the dynamics of ... of a millimeter). What happens, for example, when we try ... molecules, such as DNA) through a nanopore if knots cause ... because now a new DNA sequencing method to electrochemically analyze ...
Cached Biology News:Sweet new approach discovered to help produce metal casting parts, reduce toxicity 2Report: Cleanup of some contaminated groundwater sites unlikely for decades 2Report: Cleanup of some contaminated groundwater sites unlikely for decades 3Pull with caution 2
Although each Beacon 2000 System includes one preinstalled sample chamber (size specified at time of order), optional chambers are available and easily retrofit by the user....
... Immunogen : Recombinant human ... 5mg/ml BSA, 0.15M NaCl, 0.05% ... of glycerol to 30% Quality ... on acid extracts of murine ...
cDNA Size Fractionation Columns offer an efficient and convenient method for size-fractioning double-stranded cDNA....
Self Closing Forceps...
Biology Products: