Navigation Links
Solved: The mystery of the nanoscale crop circles
Date:3/2/2012

Almost three years ago a team of scientists at the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) was performing an experiment in which layers of gold mere nanometers (billionths of a meter) thick were being heated on a flat silicon surface and then allowed to cool. They watched in surprise as peculiar features expanded and changed on the screen of their electron microscope, finally settling into circles surrounded by irregular blisters.

The circles varied in diameter up to a few millionths of a meter, and in the center of each was a perfect square. The mysterious patterns were reminiscent of nothing so much as so called "alien" crop circles.

Until recently the cause of these strange formations remained a mystery. Now theoretical insights have explained what's happening, and the results have been published online by Physical Review Letters at http://prl.aps.org/abstract/PRL/v108/i9/e096102.

Eagerly melting alloys

When two solids are combined in just the right proportions, changes in chemical bonding may produce an alloy that melts at a temperature far lower than either can melt by itself. Such an alloy is called eutectic, Greek for "good melting." The eutectic alloy of gold and silicon 81 percent gold and 19 percent silicon is especially useful in processing nanoscale semiconductors such as nanowires, as well as device interconnections in integrated circuits; it liquefies at a modest 363˚ Celsius, far lower than the melting point of either pure gold, 1064C, or pure silicon, 1414C.

"Gold-silicon eutectic liquid can safely solder chip layers together or form microscopic conducting wires, by flowing into channels in the substrate without burning up the surroundings," says Berkeley Lab's Junqiao Wu. "It's particularly interesting for processing nanoscale materials and devices." Wu cites the e
'/>"/>

Contact: Paul Preuss
paul_preuss@lbl.gov
510-486-6249
DOE/Lawrence Berkeley National Laboratory
Source:Eurekalert  

Page: 1 2 3 4

Related biology technology :

1. Scientists solve mystery of colorful armchair nanotubes
2. Caltech researchers find that disorder is key to nanotube mystery
3. Researchers solve bloodcurdling mystery
4. Scientists peel away the mystery behind golds catalytic prowess
5. Magnetic actuation enables nanoscale thermal analysis
6. ORNL experiments prove nanoscale metallic conductivity in ferroelectrics
7. Carving at the nanoscale
8. Penn and Brown researchers demonstrate earthquake friction effect at the nanoscale
9. Wideband Antenna for Novelda Nanoscale Impulse Radar
10. Stanford engineers create nanoscale nonlinear light source
11. $13-million NSF center to explore new ways to manipulate light at the nanoscale
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Solved: The mystery of the nanoscale crop circles
(Date:9/23/2014)... 23, 2014 Dr. Williams says, “Find ... on healthcare offers a three phase process that can ... delivery system that would go far beyond anything previously ... the delivery of healthcare.” , “Every effort to improve ... to provide discernable progress throughout that system because all ...
(Date:9/23/2014)... 23, 2014 New spin-out ... Innovations, Cambridge Innovation Capital and Johnson & Johnson ... genomics company focused on harnessing the potential of ... testing and treatment, today announced it has raised ... Innovations and including Cambridge Innovation Capital and Johnson ...
(Date:9/22/2014)... SANTA CLARA, Calif. , Sept. 22, ... WBMD ), the leading source of health information, today ... that provide novel insights regarding physician and patient ... care.  Dr. Eric Topol , a leading authority ... serves as both Editor-in-Chief of Medscape and Chief Academic ...
(Date:9/22/2014)... cell fragments whose job it is to stop bleeding, ... But they can "feel" the physical environment around them, ... Platelets respond to surfaces with greater stiffness by increasing ... other platelets and other components of the clotting system, ... give them credit for, in that they are able ...
Breaking Biology Technology:Dr. Ira Williams Offers the Healthcare Solution Necessary for Patient Safety Improvement 2Inivata Raises £4m to Realise the Potential of ctDNA Analysis to Improve Cancer Treatment Through Simple Blood Tests 2Inivata Raises £4m to Realise the Potential of ctDNA Analysis to Improve Cancer Treatment Through Simple Blood Tests 3Inivata Raises £4m to Realise the Potential of ctDNA Analysis to Improve Cancer Treatment Through Simple Blood Tests 4WebMD/Medscape Digital Technology Survey Reveals Unique Insights Into How Patients and Physicians Perceive the Role, Potential and Risks Associated with Digital Health Technologies 2WebMD/Medscape Digital Technology Survey Reveals Unique Insights Into How Patients and Physicians Perceive the Role, Potential and Risks Associated with Digital Health Technologies 3WebMD/Medscape Digital Technology Survey Reveals Unique Insights Into How Patients and Physicians Perceive the Role, Potential and Risks Associated with Digital Health Technologies 4Platelets modulate clotting behavior by 'feeling' their surroundings 2
... Genetic Test Provides Early Diagnosis of Mitochondrial Diseases ... MEDomics, LLC ( www.medomics.com ) announces ... diseases, a group of disorders that can result ... headaches, blindness, deafness, and diabetes. The MEDomics mitochondrial ...
... Caliper Life Sciences, Inc. (Nasdaq: CALP ) today ... House entitled, "Innovation for Experimentation" to be held June 17, ... the Investor Breakout Session from 2:30 - 4:00 p.m. EDT. ... feature presentations by Kevin Hrusovsky, President and CEO, as well ...
... N.J., June 8 A study in ... , published by Elsevier, demonstrates that the Hepascore(TM) liver ... diagnose and stage liver fibrosis in patients with chronic ... biopsy, the standard of care for staging fibrosis, in ...
Cached Biology Technology:MEDomics Announces MitoDx(TM), the First NextGen Mitochondrial Genome Diagnostic Test 2MEDomics Announces MitoDx(TM), the First NextGen Mitochondrial Genome Diagnostic Test 3Caliper Life Sciences to Webcast Investor Session of Open House 2Study Finds Noninvasive Blood Test for Liver Fibrosis May Alleviate Need for Liver Biopsies for Some Patients with Chronic Hepatitis C 2Study Finds Noninvasive Blood Test for Liver Fibrosis May Alleviate Need for Liver Biopsies for Some Patients with Chronic Hepatitis C 3Study Finds Noninvasive Blood Test for Liver Fibrosis May Alleviate Need for Liver Biopsies for Some Patients with Chronic Hepatitis C 4
(Date:9/23/2014)... -- Newest Market IPO,s and exchange ... significant investor attention with news concerning shareholder updates and new ... NXT-ID, Inc. (NASDAQ: NXTD ), Alibaba Group Holding ... MBLY ), GoPro, Inc. (NASDAQ: GPRO ) ... (NASDAQ: NXTD ) recently completed an essential round ...
(Date:9/23/2014)... parasitic DNA fragments called "jumping genes" that insert themselves ... And that phenomenon can result in age-related diseases such ... now report that the "jumping genes" in mice become ... stops keeping them in check in order to take ... today in Nature Communications , Professor of Biology ...
(Date:9/22/2014)... September 23, 2014 A new American Cancer Society ... Assistance Program (SNAP), previously known as the food ... with income eligible non-participants. The authors say the ... at enhancing the dietary quality of SNAP participants. ... individuals and households with the resources to obtain ...
Breaking Biology News(10 mins):Latest Blockbuster IPOs and Up Listings for Global Tech Stocks Attracting Major Attention as Traders Focus on Key Economic Data Due this Week 2Latest Blockbuster IPOs and Up Listings for Global Tech Stocks Attracting Major Attention as Traders Focus on Key Economic Data Due this Week 3Latest Blockbuster IPOs and Up Listings for Global Tech Stocks Attracting Major Attention as Traders Focus on Key Economic Data Due this Week 4Latest Blockbuster IPOs and Up Listings for Global Tech Stocks Attracting Major Attention as Traders Focus on Key Economic Data Due this Week 5Latest Blockbuster IPOs and Up Listings for Global Tech Stocks Attracting Major Attention as Traders Focus on Key Economic Data Due this Week 6Latest Blockbuster IPOs and Up Listings for Global Tech Stocks Attracting Major Attention as Traders Focus on Key Economic Data Due this Week 7A multi-function protein is key to stopping genomic parasites from 'jumping' 2Federal food program puts food on the table, but dietary quality could be improved 2
... Calif., June 6 Communication,Intelligence Corporation (the "Company") ... signature solutions for business process,automation in the financial ... announced today that it has closed a financing, ... LLC (the "Investor")., As part of the ...
... basic questions about how life originated and has ... Foundation,s (NSF) Division of Environmental Biology (DEB). Ranging ... NSF,s awards for these studies will help resolve ... responses to environmental changes, including climate change. ...
... it was black as night. It was May 19, 1780 ... at hand. Accounts of that day, which became known as ... candlelight, night birds coming out to sing, flowers folding their ... has been solved by researchers at the University of Missouri ...
Cached Biology News:Communication Intelligence Corporation Closes $3.6 Million Financing 2Communication Intelligence Corporation Closes $3.6 Million Financing 3Communication Intelligence Corporation Closes $3.6 Million Financing 4National Science Foundation funds research addressing enduring questions of life 2National Science Foundation funds research addressing enduring questions of life 3National Science Foundation funds research addressing enduring questions of life 4Mystery of infamous 'New England Dark Day' solved by 3 rings 2