Navigation Links
Metamaterials may advance with new femtosecond laser technique
Date:3/10/2012

e material, that energy gets trapped within it, exciting the electrons within the material and achieving a phenomenon known as nonlinear absorption.

Inside the pocket where that energy is trapped, a chemical reaction can take place, permanently altering the internal structure of the material. The process has previously been exploited for 2D and simple 3D metal nanofabrication.

"Normally, when people use femtosecond lasers in fabrication, they're creating a wood pile structure: something stacked on something else, being supported by something else," explains Mazur.

"If you want to make an array of silver dots, however, they can't float in space."

In the new process, Vora, Mazur, and their colleagues combine silver nitrate, water, and a polymer called PVP into a solution, which they bake onto a glass slide. The solid polymer then contains ions of silver, which are photoreduced by the tightly focused laser pulses to form nanocrystals of silver metal, supported by the polymer matrix.

The need for this particular combination of chemicals, at the right concentrations, was not obvious in prior work. Researchers sometimes combine silver nitrate with water in order to create silver nanostructures, but that process provides no structural support for a 3D pattern. Another process combines silver nitrate, water, PVP, and ethanol, but the samples darken and degrade very quickly by producing silver crystals throughout the polymer.

With ethanol, the reaction happens too quickly and uncontrollably. Mazur's team needed nanoscale crystals, precisely distributed and isolated in 3D.

"It was just a question of removing that reagent, and we got lucky," Vora says. "What was most surprising about it was how simple it is. It was a matter of using less."


'/>"/>

Contact: Caroline Perry
cperry@seas.harvard.edu
Harvard University
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Optical Materials Express focus issue: Nanoplasmonics and metamaterials
2. A whole new light on graphene metamaterials
3. Grove School professor leads new metamaterials center
4. Strange new twist: Berkeley researchers discover Möbius symmetry in metamaterials
5. Nano squid skin: DOD awards $6M for metamaterials research
6. Metamaterials could reduce friction in nanomachines
7. £4.9 million to develop metamaterials for invisibility cloaks and perfect lenses
8. Molecular Detection Inc. Completes $1.5 Million Financing to Advance New Tests for Sepsis and GI Disorders
9. Drexels Gogotsi and team advance understanding of energy storage mechanisms in Nature Materials
10. Biotech Firm Spun Off from Childrens Hospital Raises $7 Million to Advance Magnetic-Based Vascular Treatment
11. Global Leaders in Advanced Biofuels Industry Urge Congressional Leaders to Extend Critical Tax Provisions
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Metamaterials may advance with new femtosecond laser technique
(Date:7/29/2015)... US-Australian drug discovery company, Novogen Limited (ASX: ... committed to progressing its ground-breaking technology platforms to Phase ... ensure the Company delivers the best value for shareholders. ... , said the Company currently had an extensive program ... programs and academic partnerships and initiatives, and he was ...
(Date:7/29/2015)...  AsureQuality and Ubiquitome have agreed to collaborate ... food and primary production sectors. The collaboration will ... the Freedom4. AsureQuality provides quality assurance ... shelf for producers, processors and Competent Authorities around ... control and pest management and surveillance programmes. ...
(Date:7/29/2015)... 2015  AmnioChor Inc., an early stage biotech startup ... to announce that the Musculoskeletal Transplant Foundation of ... in their seed round of development of the proprietary ... AmnioChor,s technology allows cryopreservation of the ... cells living within those tissues. Amnion is a well-established ...
(Date:7/29/2015)... ... 2015 , ... The third Medical Innovation Impact Index (MI3) Alert considers FDA ... combinations. The current system received a score of 0 (range -10 to +10) for ... of Fairleigh Dickinson University’s ( FDU ) Rothman Institute of Innovation and Entrepreneurship. ...
Breaking Biology Technology:Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 2Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 3Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 4Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 5Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 6Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 7Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 8Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 9Newly Appointed Acting CEO Outlines Immediate Plans for Novogen 10AsureQuality and Ubiquitome Partner on Applications for Mobile Molecular Food Safety Testing 2The Musculoskeletal Transplant Foundation Agrees to Invest in AmnioChor 2Third Medical Innovation Impact Index Issued by Fairleigh Dickinson University’s Initiative for Patient-Centered Innovation (iPCI) 2Third Medical Innovation Impact Index Issued by Fairleigh Dickinson University’s Initiative for Patient-Centered Innovation (iPCI) 3
... as a "biotech hotspot," this time in e-mail newsletter ... state's profile and is just what the biotech industry ... list of five hotspots were California, Maryland, New Jersey ... the list, told Forbes it was a subjective ranking ...
... Innovation Center Back in the mid-1980s, encouraging economic ... public utilities. But then Plant Sites & Parks magazine ... U.S. , ,Jim Mohrbacher, who worked in corporate ... and mentioned to a colleague that he thought Madison ...
... Corporation is expanding into nearly 4,000 square feet of ... few minutes south of Madison. , ,Symphony CEO Ravi Kalla ... to be customized to make it possible to serve clients ... and video conferencing capabilities to allow contact with a hundred ...
Cached Biology Technology:Utilities help switch on economic development 2Utilities help switch on economic development 3Utilities help switch on economic development 4
(Date:7/30/2015)... VIEW, Calif. , July 30, 2015 /PRNewswire/ ... and services for gene function analysis and biomarker ... Guide RNA (sgRNA) Knockout Library targeting all human ... specifically and permanently "knock out" a gene,s function. ... provides a high throughput screening tool so that ...
(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:7/13/2015)... 13, 2015 NXT-ID, Inc. (NASDAQ: NXTD ... company focused on the growing mobile commerce market, ... 62/188684 for BEHAVIORAL-DIRECTED AUTHENTIATION METHOD AND ... and secure method to make payments.  With this ... introduced with its groundbreaking voice-direct payment patent application, ...
Breaking Biology News(10 mins):CELLECTA, INC. Announces Launch of Human Whole Genome CRISPR Knockout Library 2FPC's Touch Fingerprint Sensor FPC1025 in ZTE's Smartphone Axon 2NXT-ID Patents Behavior-Directed Payments 2NXT-ID Patents Behavior-Directed Payments 3NXT-ID Patents Behavior-Directed Payments 4
... adult male sea turtles ( Caretta caretta ) using ... the potential risks posed to this threatened species by ... Toxicology and Chemistry , examines the different levels of ... turtles. "The risks posed by persistent organic pollutants ...
... BUFFALO, NY -- Exposure to air pollution early in life ... may alter her DNA and may be associated with premenopausal ... Buffalo have shown. The findings indicated that higher air ... increase levels of E-cadherin, a protein important to the adhesion ...
... in German . , Is the vacuum-packed ... not tell the whole story. And the "best-before" date is ... have added to the uncertainty, and the customer him- or ... This is an area in which a sensor film developed ...
Cached Biology News:Satellite tracking of sea turtles reveals potential threat posed by manmade chemicals 2Air pollution exposure affects chances of developing premenopausal breast cancer 2Rotten meat doesn't stand a chance 2
...
...
... I-96 Plate can be used either in ... large-scale (i.e., 96-well) purification of DNA and/or ... unique silica-based matrix make it perfect for ... RNA in = 10 l eluate per ...
Request Info...
Biology Products: