Navigation Links
New kid on the plasmonic block
Date:4/18/2011

nanoscale objects with visible light, a new generation of highly efficient light-emitting diodes, and supersensitive chemical and biological detectors. There is even evidence that plasmonic materials can be used to bend light around an object, thereby rendering that object invisible.

The plasmonic phenomenon was discovered in nanostructures at the interfaces between a noble metal, such as gold or silver, and a dielectric, such as air or glass. Directing an electromagnetic field at such an interface generates electronic surface waves that roll through the conduction electrons on a metal, like ripples spreading across the surface of a pond that has been plunked with a stone. Just as the energy in an electromagnetic field is carried in a quantized particle-like unit called a photon, the energy in such an electronic surface wave is carried in a quantized particle-like unit called a plasmon. The key to plasmonic properties is when the oscillation frequency between the plasmons and the incident photons matches, a phenomenon known as localized surface plasmon resonance (LSPR). Conventional scientific wisdom has held that LSPRs require a metal nanostructure , where the conduction electrons are not strongly attached to individual atoms or molecules. This has proved not to be the case as Prashant Jain, a member of the Alivisatos research group and one of the lead authors of the Nature Materials paper, explains.

"Our study represents a paradigm shift from metal nanoplasmonics as we've shown that, in principle, any nanostructure can exhibit LSPRs so long as the interface has an appreciable number of free charge carriers, either electrons or holes," Jain says. "By demonstrating LSPRs in doped quantum dots, we've extended the range of candidate materials for plasmonics to include semiconductors, and we've also merged the field of plasmonic nanostructures, which exhibit tunable photonic properties, with the field of quantum dots, which exhibit tunable electron
'/>"/>

Contact: Lynn Yarris
lcyarris@lbl.gov
510-486-5375
DOE/Lawrence Berkeley National Laboratory
Source:Eurekalert  

Page: 1 2 3 4 5

Related biology technology :

1. Denser, more powerful computer chips possible with plasmonic lenses that fly
2. Plasmonic whispering gallery microcavity paves the way to future nanolasers
3. GRIN plasmonics
4. Trapping a rainbow: Lehigh researchers slow broadband light waves with nanoplasmonic structures
5. New Radiation-Blocking Medical Garments Introduced at RSNA Meeting in Chicago : Demron-M Technology Provides Total Protection in a Lightweight, Durable, Flexible Fabric
6. Techstreet Launches BuildingBlocks Utility for Industry Standards Saving Time and Increasing Productivity for Engineers
7. SENOMYX ANNOUNCES INITIATION OF DEVELOPMENT ACTIVITIES FOR NEW BITTER BLOCKERS
8. Hebrew University scientist develop technique for eliminating reblockage of arteries
9. Viroblock SA Reports Positive Results of Preclinical Studies in Antiviral Nasal Spray
10. Spring blockbuster movie now showing
11. Pierre Fabre Dermatologie Starts Clinical Trials on a Beta-Blocker to Treat Severe Infantile Haemangioma
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New kid on the plasmonic block
(Date:1/15/2014)... Cynvenio, a cancer diagnostics company focused on ... of tumor cells in the bloodstream, today announced that ... support application powered by CollabRx, Inc. , Available ... Therapy Finder will provide breast cancer patients and their ...
(Date:1/15/2014)... 15, 2014 This webinar will focus ... clinical safety assessment in biosimilars. , Regulatory frameworks are ... drug development, however the complex nature of biopharmaceuticals makes ... and efficacy extremely challenging. Based on the specific aspects ...
(Date:1/15/2014)... Two champions of science, technology, engineering, ... an annual competition for middle and high school students ... STEM study. The competition presents students with real-world problems ... Aptitude, Mathematics, and Sciences is a program administered ...
(Date:1/15/2014)... 2014 2013 was a banner year ... Technologies®. They saw continued independent research led by the ... awarded a $1 million grant from the Susanne Marcus ... Behavior” a peer reviewed journal, Amy Grant highlighted Brainwave ...
Breaking Biology Technology:Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 3Xtalks Life Sciences Webinar Examines Safety Assessment of Biosimilars 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 4Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 5Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 2Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 3
(Date:4/17/2014)... such as heart disease, epilepsy and pain, making them ... is still much scientists do not know about the ... into the structure of sodium channels and, specifically, one ... responsible for ,fine-tuning, the activity of the channel. The ... the Journal of Biological Chemistry . , Nerves ...
(Date:4/17/2014)... Indiana University researchers have detected new early-warning signs of ... discovery could have far-reaching implications for the diagnosis and ... over 25 million Americans. , "We had not expected ... such early stages," said Ann Elsner, professor and associate ... author of the study. "We set out to study ...
(Date:4/17/2014)... forests are chock full of wild animals and plant ... of fungi are churning away in the soil, decomposing ... Despite the vital role these fungi play in ecological ... Stanford-led team of scientists has generated a genetic map ... America. The work was published this week in the ...
Breaking Biology News(10 mins):Structure of sodium channels different than previously believed 2New technique detects microscopic diabetes-related eye damage 2New technique detects microscopic diabetes-related eye damage 3Stanford biologists help solve fungal mysteries 2Stanford biologists help solve fungal mysteries 3
... of the Journal of the American Medical Association ... between urine concentrations of the environmental estrogen bisphenol A ... abnormalities. In an accompanying editorial, Frederick vom Saal, a ... Administration (FDA) to follow recent action by Canadian regulatory ...
... David Lane, chairman of Singapore A*STAR,s Biomedical Research Council, ... contribution to cancer research through his discovery of p53 ... Medal is one of the highest accolades from the ... whose intellectual endeavour have made an impact on people,s ...
... press release is available in German . ... cancerous cells that appear out of the blue. But the ... system smuggle small molecules (granzymes) into cancer cells and those ... then trigger off the diseased cells, built-in suicide program. There ...
Cached Biology News:Expert urges FDA to take action to reduce BPA exposure 2Pores open the door to death 2Pores open the door to death 3
...
BD Falcon microtest assay plate. 1536 well 12l, black, flat-bottom PS. Polystyrene, nonsterile, no lid. (15/sp, 60/ca) Packaging: 15 / pack, 60 / case ...
... Slotted migration Chamber lid allows ... One-touch connectors for easy set up ... Magnetic safety-switch prevents current flow if the lid ... Excellent safety and durability., Remote control ...
... Black wall plates have low ... reduced crosstalk,• Not treated (or medium ... nature and binds biomolecules through passive ... the immobilization of large molecules, such ...
Biology Products: