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:5/5/2015)... , May 5, 2015 CytomX, a biotechnology ... today announced that Sean McCarthy , D. Phil., ... Antibody Day in New York ... McCarthy will present an overview of CytomX,s Probody pipeline, ... conjugate programs. About CytomX Therapeutics CytomX ...
(Date:5/5/2015)... May 5, 2015  Indianapolis-based medical device manufacturer ... innovative line of products including the BrainPath® and ... accessing deep-seated brain abnormalities and then removing affected ... at more than 50 institutions throughout ... also been included in 12 abstracts, three peer-reviewed ...
(Date:5/4/2015)... JSS Medical Research Inc., a Montreal based ... of Max Neeman International (MNI), with head office in ... Ahmedabad, Bangalore , Chennai ... regional office is located North Carolina, USA . ... equity investment transaction into JSS with Capital Croissance PME (CCPME), a ...
(Date:5/4/2015)... 2015 /PRNewswire/ - Fluorinov Pharma (Fluorinov), a FACIT ... of Dr. Roger J Garceau, to its Board ... in matters including corporate development and clinical strategy, ... significant regulatory expertise as Fluorinov transitions to clinical ... years of pharmaceutical development experience to Fluorinov and ...
Breaking Biology Technology:NICO Corporation Gains Market Expansion after Multiple Published Clinical Articles Support Access Technology for Deep Brain Lesions 2NICO Corporation Gains Market Expansion after Multiple Published Clinical Articles Support Access Technology for Deep Brain Lesions 3JSS Medical Canada widens its global presence across Asia/Pacific region 2JSS Medical Canada widens its global presence across Asia/Pacific region 3JSS Medical Canada widens its global presence across Asia/Pacific region 4Roger J Garceau joins Fluorinov board, adds clinical expertise to bromodomain program and oncology pipeline 2Roger J Garceau joins Fluorinov board, adds clinical expertise to bromodomain program and oncology pipeline 3
... BEIJING, Aug. 14 /PRNewswire-Asia-FirstCall/ -- Lotus ... growing developer and,producer of prescription drugs and licensed national seller ... financial results,for the quarter and six months ended June 30, ... Highlights and Developments:, -- Q2 diluted EPS ...
... HARBIN, China, Aug. 14 /PRNewswire-Asia-FirstCall/ -- ... Company") (Nasdaq: CSKI ), a,leading fully integrated pharmaceutical ... financial results for the second quarter,of 2009. , , ... Total revenues increased 35.5% year-over-year to $32.2 million, ...
... ... for ISP,s Vincience™ Biofunctional Ingredients, Rapidly and Effectively , ... (PRWEB) August 14, 2009 -- ... global supplier of advanced personal care ingredients, announced that they have formed an ...
Cached Biology Technology:Lotus Pharmaceuticals, Inc. Reports Second Quarter 2009 Financial Results 2Lotus Pharmaceuticals, Inc. Reports Second Quarter 2009 Financial Results 3Lotus Pharmaceuticals, Inc. Reports Second Quarter 2009 Financial Results 4Lotus Pharmaceuticals, Inc. Reports Second Quarter 2009 Financial Results 5Lotus Pharmaceuticals, Inc. Reports Second Quarter 2009 Financial Results 6Lotus Pharmaceuticals, Inc. Reports Second Quarter 2009 Financial Results 7Lotus Pharmaceuticals, Inc. Reports Second Quarter 2009 Financial Results 8Lotus Pharmaceuticals, Inc. Reports Second Quarter 2009 Financial Results 9Lotus Pharmaceuticals, Inc. Reports Second Quarter 2009 Financial Results 10Lotus Pharmaceuticals, Inc. Reports Second Quarter 2009 Financial Results 11China Sky One Medical, Inc. Announces Record Second Quarter 2009 Results 2China Sky One Medical, Inc. Announces Record Second Quarter 2009 Results 3China Sky One Medical, Inc. Announces Record Second Quarter 2009 Results 4China Sky One Medical, Inc. Announces Record Second Quarter 2009 Results 5China Sky One Medical, Inc. Announces Record Second Quarter 2009 Results 6China Sky One Medical, Inc. Announces Record Second Quarter 2009 Results 7China Sky One Medical, Inc. Announces Record Second Quarter 2009 Results 8China Sky One Medical, Inc. Announces Record Second Quarter 2009 Results 9China Sky One Medical, Inc. Announces Record Second Quarter 2009 Results 10China Sky One Medical, Inc. Announces Record Second Quarter 2009 Results 11Cellworks Group and ISP Personal Care Collaborate to Demonstrate Effectiveness of Proteomics-Based Computer Modeling of Skin Biology 2Cellworks Group and ISP Personal Care Collaborate to Demonstrate Effectiveness of Proteomics-Based Computer Modeling of Skin Biology 3Cellworks Group and ISP Personal Care Collaborate to Demonstrate Effectiveness of Proteomics-Based Computer Modeling of Skin Biology 4
(Date:4/13/2015)... , April 13, 2015  higi, a leading cloud-based ... to more fully engage with their communities around health ... privacy protected and secure API.  ... the most accessible, affordable, and convenient vehicle to receive ... The API will allow higi,s ...
(Date:4/8/2015)... 2015  Infinisource, a leading provider of SaaS-based Human ... a leading supplier of biometric identification and security ... most advanced biometrically-enabled time clock, the companies announced ... is setting a bold, new standard for the ... small and mid-size employer. When connected to the ...
(Date:4/2/2015)... , April 2, 2015 At its 2015 ... Lake City , the American College of Medical ... new directors to its Board.  Members of the ACMG ... and for forming and advancing its policies and programs. ... profession. "It,s an eventful time in medical ...
Breaking Biology News(10 mins):higi Launches Seamless Access to HIPAA-Compliant Health Outcomes and Activity Data 2higi Launches Seamless Access to HIPAA-Compliant Health Outcomes and Activity Data 3iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 2iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 3American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 2American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 3American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 4American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 5American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 6American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 7American College of Medical Genetics and Genomics Announces New Board Members: Dr. Louanne Hudgins is ACMG President-Elect 8
... University, in London, Canada, have developed a CT (Computed Tomography) ... Battista, Chair of the Department of Medical Biophysics at the ... the London Regional Cancer Program at London Health Sciences Centre ... interactive way to teach CT imaging techniques to a wide ...
... Research Institute (OHRI) and the University of Ottawa (uOttawa) has ... (CIHR) and $75,000 from the Stem Cell Network to lead ... cell therapy for septic shock. This deadly condition occurs when ... system, resulting in severe organ damage and death in 30 ...
... Epigenetics is the new hip science. Time Magazine,s front cover ... explains why. Its more explicit subtitle provided the hook - ,The ... change your genes - and those of your kids,. Who ... ways in which the genetic code in our DNA is regulated ...
Cached Biology News:Mini-CT scanner developed as a teaching tool 2Ottawa researchers to lead world-first clinical trial of stem cell therapy for septic shock 2Ottawa researchers to lead world-first clinical trial of stem cell therapy for septic shock 3Epigenetics and epidemiology -- hip, hype and science 2Epigenetics and epidemiology -- hip, hype and science 3
anti-Lactate Dehydrogenase...
6-keto Prostaglandin F1α EIA Antiserum 6-keto-PGF1alpha EIAs prostaglandins antisera enzyme immunoassays reagents 6-keto-PGF1.alpha....
... developed for use with immunohistochemical (IHC) ... background staining due to endogenous peroxidase. ... with hydrogen peroxide. This reagent ... additional novel components to further quench ...
Phospho-Btk (Tyr223) Antibody...
Biology Products: