Navigation Links
Controlling friction by tuning van der Waals forces
Date:7/19/2013

This news release is available in German.

For a car to accelerate there has to be friction between the tire and the surface of the road. The amount of friction generated depends on numerous factors, including the minute intermolecular forces acting between the two surfaces in contact so-called van der Waals forces. The importance of these intermolecular interactions in generating friction has long been known, but has now been demonstrated experimentally for the first time by a research team led by Physics Professor Karin Jacobs from Saarland University and Professor Roland Bennewitz from the Leibniz Institute for New Materials (INM). Interestingly, the research team has shown that the friction acting at a material surface is influenced by the structure of the sub-surface layers.

Friction is an everyday phenomenon that is sometimes desirable (enabling cars to accelerate) and sometimes not (friction in the form of vehicle drag and friction in the engine and transmission system increase the car's energy consumption). For many scientists and engineers, the ability to control friction is therefore right at the top of their wish list. A possible approach to controlling friction has just been published by researchers at Saarland University and INM. They have discovered that frictional force is affected by the composition of the materials beneath the surface.

The work carried out by the Saarbrcken scientists involved taking a closer look at the intermolecular forces acting between two materials. In order to be able to vary these forces, the researchers worked with polished, single-crystal silicon wafers. 'The wafers are covered with silicon dioxide layers of different thicknesses and are similar to those used in the semiconductor industry,' explained Karin Jacobs, Profe
'/>"/>

Contact: Karin Jacobs
k.jacobs@physik.uni-saarland.de
Saarland University
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Controlling magnetic clouds in graphene
2. Controlling your computer with your eyes
3. Study improves understanding of surface molecules in controlling size of gold nanoparticles
4. Triboelectric generator produces electricity by harnessing friction between surfaces
5. Slippery when stacked: NIST theorists quantify the friction of graphene
6. Penn and Brown researchers demonstrate earthquake friction effect at the nanoscale
7. Strain tuning reveals promise in nanoscale manufacturing
8. Oxford Performance Materials and Biomet Microfixation Join Forces
9. Digital Science & SciBite Join Forces to Harness Big Data for Life Sciences
10. Sanofi Oncology and Colon Cancer Coalition Join Forces to Raise Awareness of Colorectal Cancer
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/30/2015)... Marshall, MN (PRWEB) , ... July 31, 2015 , ... ... Ralco Enrichment Center at the Lyon County Fair to be held August 5-9 in ... more about where their meals come from and how agriculture impacts their daily lives. ...
(Date:7/30/2015)... ... , ... The 2015 Market Research Report on the Global Propanol Industry ... Propanol market with a focus on the Chinese situation. Major companies included in the ... Chemical, Sanofi, Royal Dutch Shell, LG Chem and Zhejiang Xinhua Chemical. , The report ...
(Date:7/30/2015)...   Senomyx , Inc. (NASDAQ: SNMX ), ... discover, develop, and commercialize novel flavor ingredients for the ... results for the second quarter 2015. ... on track to achieve our commercial and financial goals," ... the Company. "Since our last quarterly earnings report, our ...
(Date:7/30/2015)... , July 30, 2015  Discovery Laboratories, Inc. ... has received the second $1.0M tranche under a ... (SBIR) grant valued at up to $3.0 million ... KL4 surfactant as a potential medical countermeasure to ... Labs was awarded an initial $1.0 million under ...
Breaking Biology Technology:Ralco Announces Primary Sponsorship of Ralco Enrichment Center at Lyon County Fair 2Global Propanol Market Technical Data and Manufacturing Analysis 2020 2Global Propanol Market Technical Data and Manufacturing Analysis 2020 3SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 2SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 3SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 4SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 5SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 6SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 7SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 8SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 9Discovery Labs Receives $1.0 million under an SBIR Grant in Continuing Support of the Development of Aerosolized KL4 Surfactant to Address Radiation-Induced Lung Injury 2Discovery Labs Receives $1.0 million under an SBIR Grant in Continuing Support of the Development of Aerosolized KL4 Surfactant to Address Radiation-Induced Lung Injury 3
... A team of Duke University chemists has perfected a simple ... conductors are small enough to be transparent, making them ideal ... displays. "Imagine a foldable iPad," said Benjamin Wiley, an ... findings online this week in Advanced Materials . ...
... 1 Solutia Inc. (NYSE: SOA ), a ... Jeffry N. Quinn , chairman, president and CEO, will address ... a.m. EDT on Thursday, June 3, 2010 , in ... with the slides and replay will be available on the investor ...
... June 1 Companies invest hundreds of millions of dollars to develop new ... , , , ... must maximize product uptake across all customer groups: not only among patients and physicians, ... placement.   , , , ...
Cached Biology Technology:Copper nanowires enable bendable displays and solar cells 2Solutia to Present at Credit Suisse Future Energy Conference 2Maximize Market Research to Improve Formulary Access Within Managed Markets Sector 2Maximize Market Research to Improve Formulary Access Within Managed Markets Sector 3
(Date:7/23/2015)... Inc. (NASDAQ: AWRE ), a leading supplier of biometrics ... quarter ended June 30, 2015.  Revenue for ... of 33% compared to $6.8 million in the same quarter ... was $0.3 million, or $0.01 per diluted share, which compared ... same period a year ago.  Lower revenue ...
(Date:7/21/2015)... 21, 2015 Today, ZTE announced its Android ... well as expected revenues in 2015 that relate to sales of ... guidance of approximately 2,200 MSEK for 2015. Jörgen Lantto, ... smartphone manufacturer in China and we are ... 5 for Axon , its ...
(Date:7/21/2015)... July 21, 2015 Passwords have proven ... in the recent U.S. Office of Personnel Management ... the infosec conundrum, but developers and end-users are ... address this dilemma, Biometrics-as-a-Service provider HYPR Corp. announced ... SDK for third party integration. ...
Breaking Biology News(10 mins):Aware, Inc. Reports Second Quarter 2015 Financial Results 2Aware, Inc. Reports Second Quarter 2015 Financial Results 3Aware, Inc. Reports Second Quarter 2015 Financial Results 4Aware, Inc. Reports Second Quarter 2015 Financial Results 5Aware, Inc. Reports Second Quarter 2015 Financial Results 6FPC's Touch Fingerprint Sensor FPC1025 in ZTE's Smartphone Axon 2HYPR Corp. Launches Industry First Biometric Tokenization Platform 2HYPR Corp. Launches Industry First Biometric Tokenization Platform 3HYPR Corp. Launches Industry First Biometric Tokenization Platform 4
... MAMMALS could be at a greater risk of extinction due ... published today by the Zoological Society of London (ZSL). ... with information of where droughts and cyclones are most likely ... risk of exposure to extreme weather. The paper, published this ...
... WASHINGTON D.C. -- Secretary of Energy Steven Chu was among ... NSF,s Graduate Research Fellowship Program (GRFP) today. GRFP is ... engineering fields within NSF,s mission. It has been in ... in students with demonstrated potential for significant achievements in science ...
... synchronize their movements. For example, the footsteps of two ... consciously aware that it is happening. Similarly, the clapping ... Although this type of synchronous body movement has been ... social interactions remain obscure. In a new study, led ...
Cached Biology News:Disaster map predicts bleak future for mammals 260th anniversary of NSF Grad Research Fellowship Program; UM fellow Staaterman's video recognized 2Social synchronicity 2Social synchronicity 3
Amino-acids and Derivatives Rabbit Anti-conjugated L-isoleucine Polyclonal Antibody...
Anti-MMP-25 (Membrane-type MMP-6, Mt6MMP), hinge region; rabbit host...
Mouse monoclonal [88B] to nicotinic Acetylcholine Receptor ( Abpromise for all tested applications)....
D4-GDI rabbit polyclonal antibody...
Biology Products: