Navigation Links
As sticky as a gecko... but 10 times stronger!
Date:10/14/2008

The gecko's amazing ability to stick to surfaces and walk up walls has inspired many researchers to manufacture materials that mimic the special surface of a gecko's foot. The secret behind the gecko's ability to stick so well is a forest of pillars at the micro-/nano-scale on the underside of the gecko's foot. Because there are so many pillars so close together, they are held tightly to the surface the gecko is walking on by a molecular force called the Van der Waals force. This relatively weak force causes uncharged molecules to attract each other.

In an unprecedented feat, Liming Dai, at the University of Dayton, and colleagues report in the October 10th issue of Science successful construction of a gecko-inspired adhesive that is ten times stronger than a gecko, at about 100 newtons per square centimeter.

The researchers constructed their adhesive out of two slightly different layers of multi-walled carbon nanotubes. The lower layer is composed of vertically-aligned carbon nanotubes, while the upper segment--which comes into contact with the surface it is sticking to--is curly, like a mess of spaghetti.

As shown in the figure, the adhesive sticks best when it is pulled down parallel to the surface it is sticking to--this is called shear adhesion. This action arranges the tips of the curly nanotubes so they have maximum contact with the substrate, thereby maximizing the Van der Waals force. Pulling the adhesive off in a motion perpendicular to the substrate is much easier--at this angle the sticking force is ten times weaker.

In this way, the adhesive has strong shear adhesion for firm attachment and relatively weak adhesion for detachment perpendicularly to the substrate. Just like a gecko, the adhesive can stick to a wall when needed, and then lift off easily to take the next step. This breakthrough, supported by the National Science Foundation, will have many technological applications.


'/>"/>

Contact: Joshua A. Chamot
jchamot@nsf.gov
703-292-7730
National Science Foundation
Source:Eurekalert  

Page: 1

Related biology news :

1. Sticky questions tackled in gecko research
2. Premature children 4 times more likely to have behavioral disorders
3. Top Secret Technology To Help U.S. Swimmers Trim Times at Beijing Olympics
4. Top secret technology to help US swimmers trim times at Beijing Olympics
5. Estimation of isolation times in the Drosophila simulans complex
6. Stanfords nanowire battery holds 10 times the charge of existing ones
7. Brains timing linked with timescales of the natural visual world
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
As sticky as a gecko... but 10 times stronger!
(Date:11/21/2014)... 2014 According to a new ... (Video, RFID, Access Control, Intrusion Detection, Parking Management, Under ... Component Service Geography - Global Forecasts to 2020", published ... to be around $25 Billion in 2014 and is ... a CAGR of 8.69%. Browse 116 market ...
(Date:11/21/2014)... NEW YORK , Nov. 19, 2014  Earlier ... Board at New York College, and one of the ... for biosensor signals that are transmitted from Smartphones to ... there were Smartphones and has one of the earliest ... are discussing its usage in the military, child care, ...
(Date:11/21/2014)... MOUNTAIN VIEW, Calif. , Nov. 20, 2014 /PRNewswire/ ... for higher driver efficiency are piloting the North American ... the number of accidents growing, gesture recognition systems that ... will make a mark in the industry. ... of the Automotive Gesture Recognition Market in ...
Breaking Biology News(10 mins):Industrial Security Systems Market Worth $38 Billion by 2020 2Industrial Security Systems Market Worth $38 Billion by 2020 3Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 2Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 3Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 4Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 2Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 3Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 4
... healthy human gene to prevent blindness in mice with ... boys. , Writing in the August issue of Molecular ... they successfully used gene therapy in mice to treat ... mothers, who retain their sight, to their sons. , ...
... private practice, government and industry are coming together ... a rapidly growing area of medicine involving minimally ... first two days of the meeting focus on ... The second half of the meeting provides an ...
... their latest discovery, researchers have significantly advanced the ... constant and potentially destructive changes in gene expression. ... Nature Structural & Molecular Biology, the research is ... disease, and the ability to side-step it may ...
Cached Biology News:Gene therapy works in mice to prevent blindness that strikes boys 2Gene therapy works in mice to prevent blindness that strikes boys 3Minimally Invasive Cancer Treatments Highlighted 2Minimally Invasive Cancer Treatments Highlighted 3Study provides insight into cellular defenses against genetic mutation 2Study provides insight into cellular defenses against genetic mutation 3Study provides insight into cellular defenses against genetic mutation 4
(Date:11/26/2014)... 2014 Deep Research Report on ... in-depth research report on the Ammonium Bifluoride market, ... classification, application, and industry chain structure as well ... market analysis, including China’s domestic market as well ... China, Japan etc. regions) industry analysis covering macroeconomic ...
(Date:11/26/2014)... 2014 The Alliance for Safe ... of European physicians at the "1 ST ... Therapies" at the Spanish Ministry of Health, Social ... and the Spanish Bioindustry Association (ASEBIO), included regulators ... Spanish oncology and rheumatology societies, representatives from a ...
(Date:11/26/2014)... Charlotte, NC (PRWEB) November 25, 2014 ... High Intensity Focused Ultrasound (HIFU) devices, recently participated ... “ Small Renal Mass 360° .” Key opinion ... and therapeutic advances related to small renal masses ... learn about different ablative technologies in hands-on labs. ...
(Date:11/26/2014)... Chester, OH (PRWEB) November 25, 2014 ... Holdings, has joined the Graphel Carbon Products team as ... in sales, marketing, and customer service for the graphite ... add Miles to our team,” stated Dave Trinkley, VP ... “His wide range of experience in the graphite ...
Breaking Biology Technology:Ammonium Bifluoride Market International Analysis of Manufacturing, Technology & Trends Now at ReportsnReports.com 2Ammonium Bifluoride Market International Analysis of Manufacturing, Technology & Trends Now at ReportsnReports.com 3ASBM Presents European Physicians Survey at Spanish Ministry of Health 2SonaCare Medical Supports American Urology Association’s Small Renal Mass 360° Summit 2SonaCare Medical Supports American Urology Association’s Small Renal Mass 360° Summit 3Miles Holder Joins Graphel Corporation as Sales/Marketing Manager 2
... Inc., announced today that it has successfully completed a ... Capital on behalf of the MPM Bio IV NVS ... of a Phase 1/2 human clinical study of its ... disease undergoing surgery for arteriovenous fistula (AVF) creation. Additionally, ...
... and Helena Rojas to Director of Global Business Development Operations ... ... International Ltd., a leading provider of multilingual localization, testing and outsourced ... Arney to Vice President of Global Business Development and Helena Rojas ...
... Oncolytics Biotech Inc. (TSX:ONC, NASDAQ: ONCY ) ("Oncolytics" ... the year ended December 31, 2008. , "In 2008, ... Dr. Brad Thompson, President and CEO of Oncolytics. "The ... interim results reported in our US and UK clinical ...
Cached Biology Technology:Proteon Therapeutics Completes $38M Equity Financing; Initiates Phase 1/2 Clinical Study of PRT-201 in Hemodialysis Patients and Signs Option Agreement With Major Pharmaceutical Company 2Localization and Translation Leader CSOFT International Ltd. Recognizes Efforts of Two Key Members of its Business Development Team 2Localization and Translation Leader CSOFT International Ltd. Recognizes Efforts of Two Key Members of its Business Development Team 3Oncolytics Biotech(R) Inc. Reports Highlights and Financial Results for 2008 2Oncolytics Biotech(R) Inc. Reports Highlights and Financial Results for 2008 3Oncolytics Biotech(R) Inc. Reports Highlights and Financial Results for 2008 4Oncolytics Biotech(R) Inc. Reports Highlights and Financial Results for 2008 5Oncolytics Biotech(R) Inc. Reports Highlights and Financial Results for 2008 6Oncolytics Biotech(R) Inc. Reports Highlights and Financial Results for 2008 7Oncolytics Biotech(R) Inc. Reports Highlights and Financial Results for 2008 8Oncolytics Biotech(R) Inc. Reports Highlights and Financial Results for 2008 9
in vitro Translation, Accessory Products...
Request Info...
... Origami host strains are K-12 derivatives that ... (trxB) and glutathione reductase (gor) genes, which ... cytoplasm. Studies have shown that expression in ... in another host even though overall expression ...
Request Info...
Biology Products: