Navigation Links
Narrowest bridges of gold are also the strongest, study finds
Date:7/13/2011

BUFFALO, N.Y. -- At an atomic scale, the tiniest bridge of gold -- that made of a single atom -- is actually the strongest, according to new research by engineers at the University at Buffalo's Laboratory for Quantum Devices.

The counterintuitive finding is the result of experiments probing the characteristics of atomic-scale necks of gold that formed when the pointed, gold tip of a cantilever was pushed into a flat, gold surface. An examination of these tiny, gold bridges revealed that they were stiffest when they comprised just a single atom.

The study was published in June in Physical Review B by a trio of UB researchers: postdoctoral fellow Jason Armstrong and professors Susan Hua and Harsh Deep Chopra, all in UB's Department of Mechanical and Aerospace Engineering. Support for the work came from National Science Foundation grants No. DMR-0706074 and No. DMR-0964830.

As engineers look to build devices such as computer circuits with ever-smaller parts, it is critical to learn more about how tiny components comprising a single atom or a few atoms might behave. The physical properties of atomic-scale gadgets differ from those of larger, "bulk" counterparts.

"Everyday intuition would suggest that devices made of just a few atoms would be highly susceptible to mechanical forces," the team said. "This study finds, however, that the ability of the material to resist elastic deformation actually increases with decreasing size."

Another observation the team made while studying the tiny gold necks: abrupt atomic displacements that occur as the gold tip and surface are drawn apart are not arbitrary, but follow well-defined rules of crystallography. More scientific highlights of the work are summarized in the Physical Review Focus of the American Physical Society at http://focus.aps.org/story/v27/st24.

UB's Laboratory for Quantum Devices, led by Chopra and Hua, works on mapping the evolution of various physical properties of materials -- including mechanical, magnetic and magneto-transport behavior -- as sample sizes grow from a single atom to bulk.

This complicated task requires technology capable of capturing a single or few atoms between probes, and further pushing and pulling on the atoms to study their response.

The sophisticated technology that Armstrong, Hua and Chopra invented and built to accomplish the research was recently licensed to Precision Scientific Instruments Inc., a Western New York start-up company founded by the leaders of Murak & Associates LLC, a management consulting practice; SoPark Corporation, an electronics service manufacturer (ESM); and The PCA Group, Inc., a consulting firm that offers total technology solutions.

"The instruments and methods are incredibly precise and capable of deforming the sample at the picometer scale (about 100 times smaller than an atom), which means literally stretching the bond lengths, and simultaneously measuring the forces at the piconewton level, as well as various other properties. As a very broad perspective, by enabling researchers to probe the very small, the technology could speed advances in fields ranging from satellite communications to health care," said Gerry Murak, president and cofounder of Precision Scientific Instruments, Inc.

"Small is exciting, and atomic scale devices are the new frontier of technology. Metrology systems capable of probing the behavior of atomic-scale devices are sorely needed, and this technology gives us a unique platform," Murak said.


'/>"/>

Contact: Charlotte Hsu
chsu22@buffalo.edu
716-645-4655
University at Buffalo
Source:Eurekalert  

Related biology technology :

1. Forward-Thinking Patient Recruitment Company Poised to Create Bridges Between Japanese Clinical R&D Industry and Global Clinical Trial Marketplace
2. Virginia Tech engineers investigate energy independent monitoring system for bridges
3. Chimerix Commences Phase 2 Clinical Study of CMX001 for Prevention of Adenovirus Disease in Pediatric and Adult Hematopoietic Stem Cell Transplant Patients
4. University of Dayton Study Overturns 250-Year-Old Belief About Effects of Age, Repeated Injury on Tissue Regeneration
5. InterMune Initiates Phase 3 ASCEND Study of Pirfenidone in IPF
6. Inovio Pharmaceuticals DNA Vaccine for Foot-and-Mouth Disease Generates Protective Neutralizing Antibodies in Second Large-Animal Study
7. Intarcia Presents Positive Phase 2 48-week Results From ITCA 650 Study at the American Diabetes Association 71st Scientific Sessions
8. New study: Even in flies, enriched learning drives need for sleep
9. Positive Results from Phase IIa Study Pave Way for Phase IIb Trial of AC-201 for the Treatment of Type II Diabetes
10. Morphotek®, Inc. Announces Initiation of MORAb-004 Phase II Study in Melanoma
11. Adeona Announces Positive Alzheimers Subgroup Analysis that Supports Additional Clinical Study of Proprietary Zinc-Based Therapy
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Narrowest bridges of gold are also the strongest, study finds
(Date:4/29/2016)... ... April 29, 2016 , ... Intelligent Implant Systems announced today that the two-level ... sale in the United States. These components expand the capabilities of the system ... sales beginning in October of 2015, the company has seen significant sales growth in ...
(Date:4/28/2016)... 28, 2016 The report "Cryocooler ... Cryocoolers), Service (Technical Support, Product Repairs & Refurbishment, Preventive ... Forecast to 2022", published by MarketsandMarkets, the global market ... 2022, at a CAGR of 7.29% between 2016 and ... and 94 Figures spread through 159 Pages and in-depth ...
(Date:4/28/2016)... Conn. (PRWEB) , ... April 28, 2016 , ... ... financing and ongoing support for Connecticut's innovative, growing companies, today announced the launch ... health and financial technology (fintech) companies. , “VentureClash looks to attract ...
(Date:4/28/2016)... ... April 28, 2016 , ... As part of an ongoing ... and expanding its LATAM network and logistics capabilities. Enhancements have been made ... clinical trial projects. , The expansion will provide unmatched clinical trial logistics services ...
Breaking Biology Technology:
(Date:3/22/2016)... PUNE, India , March 22, 2016 ... new market research report "Electronic Sensors Market for ... Fingerprint, Proximity, & Others), Application (Communication & ... and Geography - Global Forecast to 2022", ... consumer industry is expected to reach USD ...
(Date:3/17/2016)... , March 17, 2016 ABI Research, ... forecasts the global biometrics market will reach more ... 118% increase from 2015. Consumer electronics, particularly smartphones, ... fingerprint sensors anticipated to reach two billion shipments ... Dimitrios Pavlakis , Research Analyst at ABI ...
(Date:3/14/2016)... , Allemagne, March 14, 2016 ... http://www.apimages.com ) - --> - Renvoi : ... - --> --> ... solutions biométriques, fournit de nouveaux lecteurs d,empreintes digitales ... LF10 de DERMALOG sera utilisé pour produire des ...
Breaking Biology News(10 mins):