Navigation Links
Surface plasmon resonances of metal nanoparticles in array can have narrower spectral widths
Date:11/14/2008

CAMBRIDGE, Mass. Researchers at the Harvard School of Engineering and Applied Sciences (SEAS) have demonstrated experimentally and theoretically that the surface plasmon resonances of metal nanoparticles in a periodic array can have considerably narrower spectral widths than those of isolated metal nanoparticles. Further, as the optical fields are significantly more intense in a periodic array, the method could improve the sensitivity of detecting molecules at low concentrations.

While researchers have known that a group of nanoparticles could be used to increase signal levels for sensor applications, the electromagnetic interactions between the particles have often been overlooked. A team led by Ken Crozier, John L. Loeb Associate Professor of the Natural Sciences at SEAS, showed that by spacing a nanoparticle array appropriately, the interactions between nanoparticles can be optimized.

The study, published in the November 3 issue of Applied Physics Letters, was carried out by Yizhuo Chu, Ethan Schonbrun and Tian Yang under the direction of Professor Crozier, all of SEAS. "We used numerical electromagnetic simulations to design nanoparticle arrays exhibiting narrow surface plasmon resonance peaks and intense optical fields, and checked our predictions experimentally," said Crozier.

To do so, Crozier and his team fabricated the nanoparticle arrays using electron beam lithography on glass substrates. By measuring the optical transmission of collimated beams of white light through the arrays, the team found that their experimental results confirmed their original theoretical predictions of sharp plasmon resonance peaks.

"The narrow peaks occur when the product of the nanoparticle spacing and the refractive index of the surrounding medium approximately matches the plasmon resonance wavelength of a single nanoparticle," explained Crozier.

Over the past several years, Crozier and his colleagues have helped to ad
'/>"/>

Contact: Michael Patrick Rutter
mrutter@seas.harvard.edu
617-496-3815
Harvard University
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Surface Logix Appoints Keith Dionne as President and Chief Executive Officer
2. Killer pulses help characterize special surfaces
3. DARPA awards research team $1.2M grant to study surface enhanced Raman scattering
4. Trap and zap: Harnessing the power of light to pattern surfaces on the nanoscale
5. Surface Logix Announces Executive Management Changes
6. Surface dislocation nucleation: Strength is but skin deep at the nanoscale, Penn engineers discover
7. CaviWipes(R): Taking Surface Disinfection to a New Level
8. Arthrosurface Raises $4 Million of Preferred Equity Financing
9. Harland Medical Systems to Offer March Plasma Systems Surface Materials
10. Surface Logix Achieves Objectives With SLx-4090 in Phase 2a Clinical Trial
11. Decision Biomarkers Awarded U.S. Patent for Protein Array Surface Chemistry
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/24/2014)... , Dec. 24, 2014  United Therapeutics Corporation ... Medtronic, Inc. (NYSE: MDT ) has ... Food and Drug Administration (FDA) for the use ... infusion system (including a newly developed catheter) for ... Injection delivered intravenously to patients with pulmonary arterial ...
(Date:12/24/2014)... 23, 2014 GMO corn cases filed ... Syngenta, are in the process of being consolidated in ... case is In Re: Syngenta AG MIR 162 Corn ... for the District of Kansas. , Management of the ... over to U.S. District Judge John W. Lungstrum.* , ...
(Date:12/24/2014)... Dallas, Texas (PRWEB) December 23, 2014 ... on methyl mercaptan such as its definition, ... also presents product specification, manufacturing process, and ... regions, technology and applications. The analysis also ... survey, marketing channels, industry development trend and ...
(Date:12/24/2014)... Dec. 23, 2014 Vermillion, Inc. (Nasdaq: ... gynecologic disease, announced today that investors including Oracle ... Fund LLC and several Vermillion directors have agreed ... of Vermillion,s common stock and warrants to purchase ... private placement.  Under the terms ...
Breaking Biology Technology:United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 2United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 3United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 4Carey Danis & Lowe Reports on Syngenta GMO Corn Transfer Order 2Worldwide Methyl Mercaptan Market 2015-2020 Forecasts on Development & Trends Now Available at ReportsnReports.com 2Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 2Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 3Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 4Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 5
... over 60% of evaluable patients -, SEOUL, South ... today reported interim data from an ongoing phase 2 ... cell,lung cancer (NSCLC). This open-label phase 2 trial is ... NSCLC who have adenocarcinoma,histology and meet one of the ...
... Computing researchers at Houston,s Rice University and ... today announced the formation of a $2.6-million Institute ... valued at 4 million Singapore dollars, aims to ... microchips -- special-purpose computer chips that power everything ...
... Beckman Coulter,Inc. (NYSE: BEC ), a ... automate, and innovate complex biomedical testing,announced today that ... will present at the 2007 Bear Stearns Healthcare,Conference ... (EDT). (Logo: http://www.newscom.com/cgi-bin/prnh/20031202/BECLOGO ) The ...
Cached Biology Technology:Exelixis Reports Encouraging Interim Data From a Phase 2 Trial of XL647 as First-Line Therapy for Non-Small Cell Lung Cancer 2Exelixis Reports Encouraging Interim Data From a Phase 2 Trial of XL647 as First-Line Therapy for Non-Small Cell Lung Cancer 3Exelixis Reports Encouraging Interim Data From a Phase 2 Trial of XL647 as First-Line Therapy for Non-Small Cell Lung Cancer 4Rice, Nanyang Tech collaborate on sustainable nanoelectronics 2Rice, Nanyang Tech collaborate on sustainable nanoelectronics 3Beckman Coulter to Present at the Bear Stearns Healthcare Conference 2
(Date:12/11/2014)... PAUL, Minn. , Dec. 10, 2014 /PRNewswire/ ... wireless physiologic monitoring, has released a new series ... needs of preclinical toxicology researchers. M series, part ... help toxicologists collect the best possible physiologic data ... Adding functional endpoints to toxicology studies ...
(Date:12/10/2014)...  Wake Forest Baptist Medical Center today announced plans for ... Medicine. Funding for this $50 million capital project is ... publicly launched next summer. The medical ... series R.J. Reynolds Tobacco Company complex, adjacent to 525@vine ... with plans to be ready to welcome medical students ...
(Date:12/10/2014)... , December 9, 2014 ... ITN,s BCARD Platform   ... enterprise meeting scheduling solutions for business-to-business (B2B) events, ... world leader in mobile near-field communication (NFC), Bluetooth ...      (Logo: http://photos.prnewswire.com/prnh/20140612/691055) , Jifflenow ...
Breaking Biology News(10 mins):New telemetry implants expected to change how large animal toxicology studies are conducted 2Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 2Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 3Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 4Jifflenow And ITN International Bring Cutting-Edge Badge Scanning Technology To B2B Events 2Jifflenow And ITN International Bring Cutting-Edge Badge Scanning Technology To B2B Events 3
... by University of Toronto Scarborough researchers gives the best ... severe mental illness called Borderline Personality Disorder (BPD), and ... work shows that brain regions that process negative emotions ... with BPD, while brain regions that would normally help ...
... since the early 1960s have fueled a sharp increase in ... consumed by the average person over the course of a ... McGill University. Between 1961 and 2007, rising meat consumption ... world,s per capita "phosphorus footprint," the researchers conclude in a ...
... organisms. They are still present today in oceans and ... and evolving into multicellular forms, they played a key ... This has, now, been demonstrated by a team of ... from the University of Zurich. According to their studies, ...
Cached Biology News:New insights into the 'borderline personality' brain 2Dietary shifts driving up phosphorus use 2Pediatric coding top tips and pediatric CPT changes 2013 2
Request Info...
Request Info...
CoverWell imaging chamber gasket with adhesive, one chamber, 20 mm diameter, 1.0 mm deep *set of 40* Cell Biology Imaging Tools and Accessories Microscope Slide Accessories...
Request Info...
Biology Products: