Navigation Links
Penn research shows mechanism behind wear at the atomic scale
Date:1/30/2013

PHILADELPHIA Wear is a fact of life. As surfaces rub against one another, they break down and lose their original shape. With less material to start with and functionality that often depends critically on shape and surface structure, wear affects nanoscale objects more strongly than it does their macroscale counterparts.

Worse, the mechanisms behind wear processes are better understood for things like car engines than nanotech devices. But now, researchers at the University of Pennsylvania's School of Engineering and Applied Science have experimentally demonstrated one of the mechanisms behind wear at the smallest scale: the transfer of material, atom by atom, from one surface to another.

The research was conducted by Tevis Jacobs, a doctoral student in the Department of Materials Science and Engineering, and Robert Carpick, department chair of Mechanical Engineering and Applied Mechanics.

Their research was published in the journal Nature Nanotechnology.

On the nanoscale, wear is mainly understood through two processes, fracture and plastic deformation. Fracture is where large pieces of a surface break off at once, like when the point of a pencil snaps off in the middle of a sentence. Plastic deformation is what happens when the surface changes shape or compresses without breaking, like when the edge of knife gets dull or bent.

These mechanisms typically affect thousands or millions of atoms at a time, whereas nanoscale wear often proceeds through a much more gradual process. Determining the mechanisms behind this more gradual process is key to improving such devices.

"At the nanoscale, wear is a very significant problem," Jacobs says. "Nanotechnology is developing smaller and smaller parts for very tiny machines. Their contact interfaces wear out very quickly, sometimes surviving for hundreds of cycles when they need to survive for trillions or more."

One wear mechanism that had
'/>"/>

Contact: Evan Lerner
elerner@upenn.edu
215-573-6604
University of Pennsylvania
Source:Eurekalert  

Page: 1 2 3 4

Related biology technology :

1. Wolters Kluwer Research Now Available via Bloomberg Tradebook
2. ACORN Research, LLC Announces Partnership with AdeptBio, LLC
3. New England Biolabs Introduces Polbase, an Information Repository of Scientific Data for Polymerase Researchers
4. Researching graphene nanoelectronics for a post-silicon world
5. In new quantum-dot LED design, researchers turn troublesome molecules to their advantage
6. BBVA Foundation Unites the Efforts of Massachusetts General Hospital and Barcelonas Vall dHebron Hospital in Biomarker Research for Personalized Cancer Therapies
7. New research points to benefits of innovative cobas® HPV test for primary screening as Englands cervical cancer screening programme includes the test in current HPV "triage" rollout
8. Multidisciplinary team of researchers develop world’s lightest material
9. K computer research results awarded ACM Gordon Bell Prize
10. ResearchMoz: Ophthalmic Devices Market to 2017 - Glaucoma and Cataract Surgery Devices, Minimally Invasive Procedures in Ophthalmic Surgery to Drive the Ophthalmic Surgery Market
11. Researchers shrink tumors and minimize side effects using tumor-homing peptide to deliver treatment
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Penn research shows mechanism behind wear at the atomic scale
(Date:6/29/2015)... 2015  Neuralstem, Inc. (NYSE MKT: CUR), a biopharmaceutical ... molecule and cell therapy treatments for central nervous system ... listing on the NASDAQ Capital Market under the symbol ... on the NYSE MKT until the market close on ... is expected to commence on July 13, 2015. ...
(Date:6/29/2015)... ... June 29, 2015 , ... The StampedeCon 2015 ... for the fourth year in a row, will bring top technology professionals to St. ... at the intersection of data and technology. The event is proudly sponsored by DataStax, ...
(Date:6/29/2015)... NEW YORK , June 29, 2015   For ... of life sciences to assess their overall digital maturity ... to show that these companies are not maturing fast ... the healthcare industry in numerous ways overall and customers ... industries in terms of digital customer engagement.  ...
(Date:6/26/2015)... , June 26, 2015  SeraCare Life Sciences, ... manufacturers, today announced that it has signed a ... National Cancer Institute (NCI), part of the National ... positive controls for cancer assays.  The CRADA will ... accurately quantitate control DNA biosynthetics spiked into a ...
Breaking Biology Technology:Neuralstem, Inc. Announces Approval for Listing on the NASDAQ Capital Market 2Neuralstem, Inc. Announces Approval for Listing on the NASDAQ Capital Market 3StampedeCon Announces 2015 Agenda 2StampedeCon Announces 2015 Agenda 3Results from Digital Maturity Study Show Pharma Lagging 2Results from Digital Maturity Study Show Pharma Lagging 3Results from Digital Maturity Study Show Pharma Lagging 4SeraCare Life Sciences Signs CRADA with NCI to Advance Cancer Diagnostics 2SeraCare Life Sciences Signs CRADA with NCI to Advance Cancer Diagnostics 3
... BOSTON, March 12 Vical Incorporated (Nasdaq:,VICL) announced ... of its,product development programs on Monday, March 17, ... Conference (Boston -- March 17-20)., About Vical, ... on its,patented DNA delivery technologies for the prevention ...
... 11:00 a.m. ET; 8:00 a.m. PT, VANCOUVER and ... OTC: MGIFF), a clinical-stage developer of drugs for infectious,diseases, ... March 13,2008 at 11:00 a.m. ET (8:00 a.m. PT) ... January 31, 2008 and provide an update on,company activities. ...
... (Nasdaq: IDEV ) today announced the Company will ... Care Conference, on,Tuesday, March 18, 2008 at 1:40 pm ... presentation will be web cast live and may be,accessed ... at, http://www.indevus.com ., About Indevus, Indevus Pharmaceuticals, ...
Cached Biology Technology:Vical to Present at Cowen and Company Health Care Conference 2Indevus Pharmaceuticals to Present at Cowen and Company 28th Annual Health Care Conference 2Indevus Pharmaceuticals to Present at Cowen and Company 28th Annual Health Care Conference 3
(Date:6/17/2015)... HILDEN , Deutschland und GERMANTOWN, Maryland ... Investigator ®   Produktlinie mit ... QIAGEN N.V. (NASDAQ: QGEN ; Frankfurt Prime ... neue STR-Testkits der Produktlinie Investigator ... DNA-Spuren in den Markt eingeführt. Die neuen Kits zur ...
(Date:6/16/2015)... /CNW Telbec/ - handyem Inc. and FlowMetric Diagnostics ... of handyem,s HPC-150 portable flow cytometer within FlowMetric ... unprecedented model of mobile laboratory platform is presented ... Pennsylvania Convention Center, ... to 18 th 2015.  By virtue of ...
(Date:6/15/2015)... -- According to a new market research ... and Hybrid), Technologies (Recognition, IVR, OCR, Pattern & Image ... The Natural Language Processing Market is expected to grow ... the forecast period 2015-2020. Browse 65 ... spread   through 155 P ages and in-depth ...
Breaking Biology News(10 mins):QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 2QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 3QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 4QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 5QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 6handyem and FlowMetric Diagnostics announce their partnership in the development of Flow Cytometry- Based Solutions in diagnostic capabilities 2handyem and FlowMetric Diagnostics announce their partnership in the development of Flow Cytometry- Based Solutions in diagnostic capabilities 3Natural Language Processing Market Worth $13.4 Billion by 2020 2Natural Language Processing Market Worth $13.4 Billion by 2020 3Natural Language Processing Market Worth $13.4 Billion by 2020 4Natural Language Processing Market Worth $13.4 Billion by 2020 5
... protein that regulates gene expression may play a role in ... psychiatric disease. As reported in the latest issue of ... Bipolar Disorders, levels of SP4 (specificity protein 4) were lower ... from patients with bipolar disorder. The study suggests that normalization ...
... DST Health Solutions , LLC, today announced ... (CCHP) has implemented its PowerMHC® core claims administration platform ... new market requirements and enhance data integration. In addition, ... line service for CCHP, which supports more than 31,000 ...
... of a cellular mechanism linked to the toxicity of ... study, published in Environmental Science & Technology , ... neurological diseases such as Alzheimer,s. "I,m not implying ... Michael Plewa, lead scientist and professor of genetics in ...
Cached Biology News:Gene regulatory protein is reduced in bipolar disorder 2Gene regulatory protein is reduced in bipolar disorder 3DST Health Solutions' Integrated Care Management Suite Improves Care Quality, Population Management of 31,000+ Member Health Plan 2DST Health Solutions' Integrated Care Management Suite Improves Care Quality, Population Management of 31,000+ Member Health Plan 3Research links water disinfection byproducts to adverse health effects 2Research links water disinfection byproducts to adverse health effects 3
Mynox is intended for research use only. Mynox is used for the elimination of Mycoplasma and Acholeplasma in cell and virus cultures, and other biologicals....
Convenient 10X buffer concentrate used to maximize binding to the solid phase in microwell ELISA. Formulated to provide optimal pH and ionic strength for binding of antibodies and some antigens. Co...
... can be used to label ... covalently bound acridinium NHS ester ... presence of hydrogen peroxide. Acridinium ... used as a detection method ...
A trigger solution for Flashlight labeled materials....
Biology Products: