Navigation Links
Hotspots tamed by BEAST
Date:1/19/2011

The secrets behind the mysterious nano-sized electromagnetic "hotspots" that appear on metal surfaces under a light are finally being revealed with the help of a BEAST. Researchers at the U.S. Department of Energy (DOE)'s Lawrence Berkeley National Laboratory (Berkeley Lab) have developed a single molecule imaging technology, dubbed the Brownian Emitter Adsorption Super-resolution Technique (BEAST), that has made it possible for the first time to directly measure the electromagnetic field inside a hotspot. The results hold promise for a number of technologies including solar energy and chemical sensing.

"With our BEAST method, we were able to map the electromagnetic field profile within a single hotspot as small as 15 nanometers with an accuracy down to 1.2 nanometers, in just a few minutes," says Xiang Zhang, a principal investigator with Berkeley Lab's Materials Sciences Division and the Ernest S. Kuh Endowed Chaired Professor at the University of California (UC), Berkeley. "We discovered that the field is highly localized and, unlike a typical electromagnetic field, does not propagate through space. The field also has an exponential shape that rises steeply to a peak and then decays very fast."

Zhang, who directs the Center for Scalable and Integrated NanoManufacturing (SINAM), a National Science Foundation Nano-scale Science and Engineering Center at UC Berkeley, is the corresponding author of a paper on this research that appears in the journal Nature under the title "Mapping the Distribution of Electromagnetic Field Inside a 15nm Sized Hotspot by Single Molecule Imaging." Co-authoring the paper with Zhang were Hu Cang, Anna Labno, Changgui Lu, Xiaobo Yin, Ming Liu and Christopher Gladden.

Under optical illumination, rough metallic surfaces will become dotted with microscopic hotspots, where the light is strongly confined in areas measuring tens of nanometers in diameter, and the Raman (inelastic) scattering
'/>"/>

Contact: Xiang Zhang
xiang@berkeley.edu
510-225-8559
DOE/Lawrence Berkeley National Laboratory
Source:Eurekalert  

Page: 1 2 3 4

Related biology technology :

1. Prime Health Network and Its Patients Thrive in Tough Economic Times on the InstaMed Network
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Hotspots tamed by BEAST
(Date:8/29/2014)... Boston, MA (PRWEB) August 29, 2014 Due ... (FRC) last week, the Adult Stem Cell Technology Center, ... donations to support stem cell therapy research that might benefit ... adult stem cells for new stem cell technologies and therapeutic ... ALS Ice Bucket Challenge donors who wish not ...
(Date:8/28/2014)... August 28, 2014 Best Sanitizers, Inc., ... the food processing industry, is asking industry professionals to ... comparison of the E2 soap they’re currently using to ... Soap . Hand hygiene is critical to fighting ... processing environment. Six key criteria are identified to evaluate ...
(Date:8/28/2014)... converters are important devices in spintronics, an electronic ... of electrons but also on their spin and ... of electric into magnetic signals and vice versa. ... from the Institute of Physics at Johannes Gutenberg ... UK, Prague, and Japan, has for the first ...
(Date:8/28/2014)... , Aug. 28, 2014   SunTrust Robinson Humphrey ... industry veterans to its equity research team in ... ongoing expansion in equity research demonstrates our commitment ... insights to enhance their investment decision making," said ... STRH.  "We continue to make significant investments in ...
Breaking Biology Technology:The Adult Stem Cell Technology Center, LLC Declines ALS Ice Bucket Challenge Donors Wishing to Support Ethical Research for New Stem Cell Therapies 2The Adult Stem Cell Technology Center, LLC Declines ALS Ice Bucket Challenge Donors Wishing to Support Ethical Research for New Stem Cell Therapies 3Best Sanitizers, Inc. Asks Food Industry Professionals: With Fall Harvest On the Way, Is Your E2 Hand Soap Up to the Task? 2A new, tunable device for spintronics 2A new, tunable device for spintronics 3SunTrust Robinson Humphrey Expands Equity Research in Healthcare and Energy 2SunTrust Robinson Humphrey Expands Equity Research in Healthcare and Energy 3
... Secretary of Defense Donald Rumsfeld once said there ... of Wisconsin-Madison Director of Executive Education Linda Gorchels ... to discuss probable tomorrows and future predictions. By drawing ... for the Madison chapter of the World ...
... Wis. -- Lucigen Corporation , which provides molecular cloning ... on a new way to clone genes that may ... missing pieces or gaps when they analyze genes using standard ... gaps are caused by sequences of DNA that react poorly ...
... a collective "a-ha!" hit the brains of some of the ... generation of Web browser tools designed to make finding and ... ,At DEMO 2004, three companies - BIGontheNet, e.Story, and Groxis ... helped manage Web search results. , ,Then, in March, JJ ...
Cached Biology Technology:World Future Society forecasts future trends 2World Future Society forecasts future trends 3Lucigen aims to fill holes in genetic maps with new technique 2Plucking information from the web 2Plucking information from the web 3Plucking information from the web 4
(Date:8/29/2014)... is available in German . ... between organisms is considered the oldest form of communication. ... conspecifics, for example, the sexual attraction between males and ... and to coordinate reproductive behavior in males and females. ... of the Algarve in Faro, Portugal, and at the ...
(Date:8/28/2014)... app called TX Invasives is now available from the ... Texas at Austin for identifying harmful non-native plant, insect ... in the United States cause about $137 billion in ... crops, clog waterways, kill native plants and more. , ... for reporting where invasive species occur, we,re more likely ...
(Date:8/28/2014)... traditional cigarettes, but still release toxins into the ... , Scientists studying secondhand smoke from e-cigarettes discovered ... particles, with close-to-zero exposure to organic carcinogens. However, ... second-hand e-cigarette smoke were found to be significantly ... of polycyclic aromatic hydrocarbons cancer-causing organic compounds ...
Breaking Biology News(10 mins):Ready for mating at the right time 2Ready for mating at the right time 3Mobile app makes ID of harmful plants, insects in Texas a snap 2Second-hand e-cig smoke compared to regular cigarette smoke 2
... A genome-wide study by researchers at the RIKEN ... General Hospital has identified a genetic variant associated with ... virus carriers. The findings are based on a study ... Nature Genetics . Hepatocellular carcinoma (HCC), the ...
... Scientists from Queen Mary, University of London have ... fish, that could pave the way for furthering our ... and Alzheimer,s. The results will be announced today ... and Supramolecular Chemistry, in Brighton. Zinc is found ...
... July 1, 2011 Tiny marine organisms called zooplankton can ... in areas of the ocean where oxygen levels are so ... into trouble as these areas expand due to climate change. ... survive," said University of Rhode Island doctoral student Leanne Elder. ...
Cached Biology News:Zinc and the zebrafish 2Climate change could turn oxygen-free seas from blessing to curse for zooplankton 2
...
... Capture Plate is a 96-well ELISA-compatible plate (containing ... Tail Fiber Monoclonal Antibody is immobilized by a ... specifically recognizes the tail fiber protein of the ... capacity of 10 9 phage per well ...
Kit for testing the ability of a compound to simulate lipolysis in cultured human adipocytes. Kit contains controls, buffers and reagents for detecting glycerol and non-esterified free fatty acids. A...
Caliper offers a wide array of standard LabChip products designed to be used in combination with our AMS 90 and LabChip 3000 microfluidic platforms....
Biology Products: