Navigation Links
Understanding secondary light emission by plasmonic nanostructures may improve medical imaging
Date:1/13/2014

"Plasmonic nanostructures are of great current interest as chemical sensors, in vivo imaging agents, and for photothermal therapeutics," explained David G. Cahill, a Willett Professor and head of the Department of Materials Science and Engineering at the University of Illinois at Urbana-Champaign. "Applications in imaging and sensing typically involve the emission of light at a different wavelength than the excitation, or 'secondary light emission'. The interpretation of resonant secondary light emission in terms of fundamental processes has been controversial for 40 years."

"In this work, we point out that resonant electronic Raman scattering and resonant fluorescence may both be useful descriptions of the secondary emission, Cahill added. "Better understanding of these principles and their limitations can result in improved biological and medical imaging modalities."

Fluorescence is a relatively familiar process by which light of one color or wavelength is absorbed by a material, e.g., an organic dye or a phosphor, and then light is emitted at a different color after a brief interval of time. In Raman scattering, the wavelength of light is shifted to a different color in an instantaneous scattering event. Raman scattering is not common in everyday life but is a critical tool of analytical chemistry.

"Light emission from plasmonic nanostructures at wavelengths shorter than the wavelength of pulsed laser excitation is typically described as the simultaneous absorption of two photons followed by fluorescence, which is used a lot in biological imaging," explained Jingyu Huang, first author of the paper that appears in the Proceedings of the National Academy of Sciences. "However, we found that by modeling the emission as Raman scattering from electron-hole pairs can predict how the light emission depends on laser power, pulse duration, and wavelength.

"Since we understand more of the mechanism of this kind of ligh
'/>"/>

Contact: David G. Cahill
d-cahill@illinois.edu
217-333-6753
University of Illinois College of Engineering
Source:Eurekalert  

Page: 1 2

Related biology news :

1. New DRI project aimed at understanding Mercury dynamics in the Arctic tundra
2. Reinterpreting origins, examining skeletal preservation, and understanding volcanics
3. Study breaks blood-brain barriers to understanding Alzheimers
4. Study of rodent family tree puts brakes on commonly held understanding of evolution
5. Understanding hearing
6. Researchers map brain areas vital to understanding language
7. Understanding ourselves by studying the animal kingdom
8. Hormones impact stress, memories, and understanding social cues
9. Understanding immune system memory -- in a roundabout way
10. Research reveals new understanding, warning signs, and potential treatments for multiple sclerosis
11. Towards a real understanding of depression
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Understanding secondary light emission by plasmonic nanostructures may improve medical imaging
(Date:10/16/2014)... have challenged conventional thinking on how the bowel lining ... for how bowel cancer starts. , The researchers produced ... regenerating the ,crypts, that are a feature of the ... in bowel cancer development, a controversial finding as scientists ... Using 3D imaging technologies, Dr Chin Wee Tan and ...
(Date:10/16/2014)... , October 16, 2014 NXT-ID, Inc. (NASDAQ: ... "Company"), a biometric authentication company focused on the growing ... edge technologies including Wocket™, the Smart Wallet, at the ... FiRe is a leading global conference on the intersection ... by Mark Anderson , founder and publisher of ...
(Date:10/15/2014)... has admitted Johannes Gutenberg University Mainz (JGU) as ... hub continues to maintain a significant nationwide standing ... "The acceptance of Johannes Gutenberg University Mainz as ... milestone in the national and international competition for ... of Rhineland-Palatinate can be proud that Mainz University ...
Breaking Biology News(10 mins):Cryptic clues drive new theory of bowel cancer development 2NXT-ID Inc. to Present at 13th Annual FiRe Conference 2NXT-ID Inc. to Present at 13th Annual FiRe Conference 3Johannes Gutenberg University Mainz joins Germany's Gauss-Allianz as a full member 2Johannes Gutenberg University Mainz joins Germany's Gauss-Allianz as a full member 3
... West Indian tarantula has been shown to cause pain ... sense high temperatures and the hot, spicy ingredient in ... demonstrate that some plants and animals have evolved the ... by activating a specific receptor on sensory nerves. The ...
... gardener knows--different plant species mature at different times. ... this phenomenon "complementarity." It allows many species to ... period when species compete for limited resources. Now, ... Sept. 4 in the Proceedings of the National ...
... the limb regrows. What is more, a newt can also ... Planck Institute for Heart and Lung Research in Bad Nauheim ... impressive ability to regenerate and have discovered the remarkable plasticity ... do not have this ability, the findings could contribute to ...
Cached Biology News:Tarantula venom and chili peppers target same pain sensor 2Global changes alter the timing of plant growth, scientists say 2Global changes alter the timing of plant growth, scientists say 3Newts which regrow their hearts 2
(Date:10/25/2014)... , October 24, 2014 Investor-Edge ... (NASDAQ: CYTR ), Vertex Pharmaceuticals Inc. (NASDAQ: ... ALXN ), Peregrine Pharmaceuticals Inc. (NASDAQ: ... on these five companies can be accessed at: ... October 23, 2014, ended on a positive note as ...
(Date:10/25/2014)... , October 24, 2014 ... Markets ( http://www.researchandmarkets.com/research/t5t5pd/the_global_market ) has announced the addition ... Nanotubes, Graphene And Other 2-D Nanomaterials " ... (Logo: http://photos.prnewswire.com/prnh/20130307/600769) , ,CNTs and graphene are ... known to man, with a performance-per-weight greater ...
(Date:10/22/2014)... , Oct. 22, 2014 Research ... the "Global DNA Diagnostics Market (Product types, ... Share, Global Trends, Company Profiles, Demand, Insights, Analysis, ... 2020" report to their offering. ... (products, applications, techniques, end users and Geography) Global ...
(Date:10/22/2014)... The Americas Inorganic Refrigerants Market report ... Americas with analysis and forecast of revenue. , ... Refrigerants Market report, to get an idea of ... glimpse of the segmentation in the Americas inorganic ... and figures. , http://www.micromarketmonitor.com/market/americas-inorganic-refrigerants-4191654241.html , ...
Breaking Biology Technology:Biotech Stocks Technical Data - CytRx, Vertex Pharma, Alexion Pharma, Peregrine Pharma, and StemCells 2Biotech Stocks Technical Data - CytRx, Vertex Pharma, Alexion Pharma, Peregrine Pharma, and StemCells 3Biotech Stocks Technical Data - CytRx, Vertex Pharma, Alexion Pharma, Peregrine Pharma, and StemCells 4Biotech Stocks Technical Data - CytRx, Vertex Pharma, Alexion Pharma, Peregrine Pharma, and StemCells 5The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 2The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 3The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 4Global DNA Diagnostics Market (Product types, Application, Technology, End User and Geography) - Forecast to 2020 2Global DNA Diagnostics Market (Product types, Application, Technology, End User and Geography) - Forecast to 2020 3The Americas Inorganic Refrigerants Market is estimated to grow to $71.6 million by 2018 - New Report by MicroMarket Monitor 2The Americas Inorganic Refrigerants Market is estimated to grow to $71.6 million by 2018 - New Report by MicroMarket Monitor 3
... Switzerland, August 19 Arpida Ltd,(SIX: ARPN) announced today its financial results ... Key events 2009 to date, - Regulatory setback for ... under review, - Company restructuring completed, , ... June 2009 , CFO Harry Welten, MBA, commented: ...
... , WESTON, Fla., Aug. 19 In keeping with ... of families, America n Scientific Resources ... obtained from Safeguard Medical Technologies, LLC exclusive worldwide rights to sell ... and the Disintegrator Plus(TM). , , All ...
... , , LONDON, Aug. 19 ... the introduction of improved drugs to treat the disease. As healthcare ... companies conducting research on diabetes vaccines. If they succeed, the entire ... (Logo: http://www.newscom.com/cgi-bin/prnh/20081117/FSLOGO ) , , ...
Cached Biology Technology:Arpida Reports Interim Results For Six Months to 30 June 2009 2American Scientific Resources To Be Exclusive Seller of World's Only FDA Approved Home Needle Destruction Device 2American Scientific Resources To Be Exclusive Seller of World's Only FDA Approved Home Needle Destruction Device 3Emergence of Newer Drug Classes to Treat Diabetes and Co-morbidities Key to Market Expansion, Reveals Frost & Sullivan 2Emergence of Newer Drug Classes to Treat Diabetes and Co-morbidities Key to Market Expansion, Reveals Frost & Sullivan 3
... fluorescein-conjugated jetSI-ENDO (excitation at ... nm), the powerful siRNA transfection ... to determine the transfection efficiency ... and trafficking of siRNAs. More ...
... of long double stranded RNA (dsRNA) has ... a diverse group of organisms as well ... leads to the inhibition of protein expression ... target messenger RNA (mRNA). Attempts to induce ...
... lower cost and reduced space requirements ... reference standard DNA analysis technology affordable ... with any of SEQUENOM's applications and ... (iPLEXTM Gold) , Gene Expression Analysis ...
... Bruker Daltonics and Bruker BioSpins Metabolic ... metabolism studies, and analysis of complex ... system, an optional Avance NMR spectrometer ... evaluation and statistical analysis for applications ...
Biology Products: