'Sticky nanotubes' hold key to future te... (ing hairs called setae on the animal's f...)

'Sticky nanotubes' hold key to future technologies

Date:4/28/2008

ing hairs called setae on the animal's front feet use van der Waals adhesion.

"The question is, how does it stick, and, equally important, if the adhesion force is strong enough to hold its weight onto a surface like a wall, then how does it then unstick, or peel, itself to move up a vertical surface"" Strus said.

Nanotubes also have possible medical applications, such as creating more effective bone grafts and biomolecular templates to replace damaged tissues, which requires knowing precisely how the nanotubes adhere to cells.

Yet another potential application is a "nanotweezer" that might use two nanorods to manipulate components for tiny devices and machines.

Raman and Strus plotted how much force it took to peel nanotubes from surfaces, discovering that the tubes lift off in fits and starts instead of smoothly.

"We saw these jumps in peeling forces, where the nanotubes would lift off suddenly and then snag, lift off suddenly and then snag. This behavior has a very deep physical significance and can only be appreciated by means of mathematical models," Raman said.

Pipes and Zalamea, meanwhile, had already been developing theoretical models to describe how the nanotubes would peel away from a surface and from each other. The four researchers then worked together with the others to fine tune the model, which describes the physics of why nanotubes peel off unevenly.

The nanotubes used in the research had a length of about 6 microns, or millionths of a meter, and were 40 nanometers wide, roughly 500 times thinner than a human hair.

The researchers used an atomic force microscope to measure the peeling forces. The nanotube was attached to the end of a diving-board shaped part of the microscope called a microcantilever. As the nanotube was pulled away from a surface, the cantilever bent. This bending movement was tracked with a laser, revealing the forces required to peel the nanotube.

The
'/>"/>

Contact: Emil Venere
venere@purdue.edu
765-494-4709
Purdue University
Source:Eurekalert

0

GOOD

Page: 1 2 3 4
Related biology technology :

1. Sticky mussels inspire biomedical engineer yet again
2. The sensitive side of carbon nanotubes: Creating powerful pressure sensors
3. Understanding of actuator properties of carbon nanotubes bring micro machines closer
4. Improved wettability of carbon nanotubes opens the door to new possibilities
5. Carbon nanotubes to be replaced by MoSIx nanowires in high-tech devices says new study
6. Nanotubes go with the flow
7. Carbon nanotubes outperform copper nanowires as interconnects
8. The future of computing -- carbon nanotubes and superconductors to replace the silicon chip
9. Carbon nanotubes made into conductive, flexible stained glass
10. Nanotubes grown straight in large numbers
11. Novel Angiogenic Drugs, Including a Future Blockbuster from Genzyme, Could Revolutionize Treatment of Peripheral Arterial Disease

Post Your Comments:

Related Image:

'Sticky nanotubes' hold key to future technologies

(Date:12/15/2009)... MARINO, Calif., Dec. 15 Epeius Biotechnologies ... targeted genetic medicine, gained international validation of the ... Rexin-G , when scientists around the world rediscovered ... a major locus of cancer pathogenesis and disease ... therapies. Recently, scientists at the NIH National Cancer ...

(Date:12/15/2009)... Repligen Corporation (Nasdaq: RGEN ) ... in research funding to support the ongoing development ... Muscular Dystrophy Association (MDA). This grant will ... and GMP manufacture of a drug candidate for ... not only provides important funding for Repligen,s research ...

(Date:12/15/2009)... -- Reportlinker.com announces that a new market ... ,, The Future of Orphan ... Pipeline Analysis and Reimbursement ,, ... Summary ,, The author has ... Orphan Diseases Therapeutics - Market Forecasts to ...

(Date:12/15/2009)... Del. and CHARLOTTESVILLE, Va., Dec. 15 /PRNewswire-FirstCall/ ... and the University of Virginia (UVa) in ... into a strategic research collaboration to enhance ... artery disease (CAD) with a secondary focus ... http://www.newscom.com/cgi-bin/prnh/20091027/PH99766LOGO ) ,, The collaborative ...

[0] Scientists Rediscover Gene Target for Cancer Therapy [0] Repligen Receives Second Research Grant from the Muscular Dystrophy Association to Support Friedreich's Ataxia Preclinical Development Program [0] Reportlinker Adds The Future of Orphan Diseases Therapeutics - Market Forecasts to 2015, Pipeline Analysis and Reimbursement [0] AstraZeneca and the University of Virginia Sign Strategic Research Collaboration to Develop Novel Treatments for Cardiovascular Disease

... dozen great products that may never see the light ... unique hardware devices to much-needed vertical software applications to ... carefully conceived and well engineered. The market analysis has ... unfulfilled need in the marketplace. The entrepreneurs who designed ...

... a provider of services that help small businesses incorporate, ... businesses can use to manage annual state requirements. , ... them of due dates for annual report, tax and ... ,"Complying with state requirements and ongoing formalities is often ...

... MADISON - Rayovac and Sanyo have ... greater capacities and shorter charging times. , ,Sanyo will be ... recharge Nickel Metal Hydride, or NiMH, batteries in 15 minutes. ... a pressure control in each battery to regulates the charging ...

Other Biology Technology:Where have all the angels gone? 2 Where have all the angels gone? 3 Where have all the angels gone? 4

Where have all the angels gone?Business Filings releases software to help small businesses Sanyo to advance Rayovacs rechargeble batteries

(Date:12/15/2009)... 2009 Economics, environmental impacts, social dynamics, and ... the overall success of an agroecosystem. Positive or ... forcing individuals and social groups to continuously adapt ... , Experiential learning theory suggests that knowledge ... experiences. Such lessons are especially valuable for environmental ...

(Date:12/15/2009)... at VIB and Ghent University in Flanders, Belgium have ... shock, the major cause of death in intensive care ... gas in mice with septic shock, researchers Anje Cauwels ... much less damage, while their chances of survival increased ... generally assumed that nitric oxide is responsible for the ...

(Date:12/15/2009)... German ., Despite the fact that physical ... vary as to how space is encoded in their ... such as ,left, right, front, back, to talk about ... east, west, at all times for all scales: "The ... an snake by your Northern leg". Whether not only ...

Breaking Biology News(10 mins):Experiential learning teaches change and adaptation 2 Septic shock: Nitric oxide beneficial after all 2 More than a jump to the left 2 Sinus Buster Paves the Way for Natural OTC Products and Mainstream Success 59428 1 Sinus Buster Paves the Way for Natural OTC Products and Mainstream Success 59428 2 STEMCELL Technologies Inc Announces Release of Defined Animal Protein Free Maintenance Medium for hESCs and hiPSCs 59424 1 STEMCELL Technologies Inc Announces Release of Defined Animal Protein Free Maintenance Medium for hESCs and hiPSCs 59424 2 One Day Management Training Program to be Offered November 18 in Boston Area 59420 1 One Day Management Training Program to be Offered November 18 in Boston Area 59420 2 One Day Management Training Program to be Offered November 18 in Boston Area 59420 3 One Day Management Training Program to be Offered November 18 in Boston Area 59420 4 One Day Management Training Program to be Offered November 18 in Boston Area 59420 5

[0] Experiential learning teaches change and adaptation [0] Septic shock: Nitric oxide beneficial after all [1] More than a jump to the left

... Researchers at Columbia University Mailman School of Public Health ... with body mass index (BMI) and obesity in New ... BMI-healthy food outlets is associated with a lower BMI ... and restaurants -- although far more abundant than healthy ...

... diseases that starve eye tissue and nerves of oxygen ... researchers at Oak Ridge National Laboratory, the University of ... technique uses a new class of smart prosthetic implants ... oxygen because of restricted blood flow. This condition occurs ...

... 2009 (BRONX, NY) Researchers from the Albert ... have developed an onsite method to quickly diagnose tuberculosis ... mingle undetected with treatable TB strains. This study ... peer-reviewed online journal from the Public Library of Science. ...

Other Biology News:Differences in neighborhood food environment may contribute to disparities in obesity 2 ORNL, Southern Cal set sights on preventing blindness 2 Einstein and Pitt researchers develop new TB test that will dramatically cut diagnosis time 2

Differences in neighborhood food environment may contribute to disparities in obesity ORNL, Southern Cal set sights on preventing blindness Einstein and Pitt researchers develop new TB test that will dramatically cut diagnosis time

This modular laminar flow hood forces air through a 99.99% efficient HEPA filter to create a clean processing area. Configurations are available with vertical or horizontal flow; options include a wo...

... GyroTwister GX-1000 3-D Shaker , ... shaking motion of the GyroTwister GX-1000 is ... ideal for general mixing as well as ... speed is continuously adjustable across a broad ...

... the leading provider of X-ray crystallography ... fragment-based screening services to its pharmaceutical ... the binding of drug-like fragments to ... drug targets, allowing scientists to develop ...

Large-capacity refrigerated incubator chamber holds up to 4 independently-operated shakers. Programmable heat, refrigeration, humidifcation are standard. Photosynthetic operation, optional....

Biology Products:

Benchtop Laminar Flow Hood (Environmental Control Module) from Terra Universal, Inc.GyroTwister GX-1000 3-D Shaker from MIDSCI Fragment-based Screening Services from ActiveSight Innova 4900 Multi-Shaker Environmental Chamber, Holds up to 4 Shakers from New Brunswick Scientific Co., Inc.

'Sticky nanotubes' hold key to future te...(ing hairs called setae on the animal's f...)