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 light mission, we can help to design the biological and medical imaging experiments better, and at the same time we can also have more insight into the broad background of surface-enhanced Raman scattering which is also related to this kind of light emission, Huang added.


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

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:4/13/2017)... , April 13, 2017 According to a ... Identity Authentication, Identity Analytics, Identity Administration, and Authorization), Service, Authentication Type, Deployment ... the IAM Market is expected to grow from USD 14.30 Billion in ... Rate (CAGR) of 17.3%. ... MarketsandMarkets Logo ...
(Date:4/6/2017)... -- Forecasts by Product Type (EAC), Biometrics, ... (Transportation & Logistics, Government & Public Sector, Utilities / ... Facility, Nuclear Power), Industrial, Retail, Business Organisation (BFSI), Hospitality ... looking for a definitive report on the $27.9bn Access ... ...
(Date:4/3/2017)... , April 3, 2017  Data captured ... engineering platform, detected a statistically significant association ... prior to treatment and objective response of ... potential to predict whether cancer patients will ... treatment, as well as to improve both pre-infusion ...
Breaking Biology News(10 mins):
(Date:6/28/2017)... 28, 2017 (PRWEB) , ... ... ... release of Siemens’ STAR-CCM+® software for multiphysics computational fluid dynamics (CFD) simulation ... design exploration and optimization. STAR-CCM+ version 12.04 introduces Design Manager, allowing users ...
(Date:6/27/2017)... ... 27, 2017 , ... Biodex Medical Systems, Inc. announces the release of the ... assistive aid lifts patients safely from a seated to a standing position without staff ... Assist is the latest in a line of Biodex products promoting safe patient handling. ...
(Date:6/26/2017)... Milwaukee, WI (PRWEB) , ... June 26, 2017 , ... ... today in role of Sales Director, focused on leading new business development and ensuring ... 10 years of experience in the food ingredient industry in technical, marketing and sales ...
(Date:6/23/2017)... and CARDIFF, UK (PRWEB) , ... June 23, 2017 , ... ... and Brian Lula, president of Physik Instrumente USA, have been selected as this year’s ... photonics . , The two have been invited along with other honorees to accept ...
Breaking Biology Technology: