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:8/28/2014)... 2014 Whitehouse Laboratories is excited to ... with PTI Inspection Systems that will enable ... the art leak testing method development and validation programs ... available. As part of this agreement, Whitehouse Labs has ... Detection Instrument developed and manufactured by PTI. The ...
(Date:8/27/2014)... 2014 Reportlinker.com announces that a ... its catalogue: Global Biodegradable Packaging ... http://www.reportlinker.com/p02316661/Global-Biodegradable-Packaging-Materials-Market-2014-2018.html About Biodegradable Packaging ... readily decomposed by the action of microorganisms. ... in terms of raw materials, production technology, ...
(Date:8/27/2014)... -- Research and Markets  has announced the ... Polymer, Food & Beverage, Personal Care & Pharmaceutical) ... report to their offering. Lactic acid ... carbon atom. The main applications of lactic acid ... personal care product, and pharmaceutical industries. Lactic ...
(Date:8/27/2014)... Reportbuyer.com has added a new market ... A Rational View https://www.reportbuyer.com/product/1595336/The-Graphene-Opportunity---A-Rational-View.html ... A similar amount of hype currently surrounds graphene, ... to water treatment, but is graphene the only ... Graphene Opportunity Report, authored by Tim Harper ...
Breaking Biology Technology:Whitehouse Labs Renews Partnership with PTI Inspection Systems 2Whitehouse Labs Renews Partnership with PTI Inspection Systems 3Global Biodegradable Packaging Materials Market 2014-2018 2Global Biodegradable Packaging Materials Market 2014-2018 3Global Biodegradable Packaging Materials Market 2014-2018 4Global Biodegradable Packaging Materials Market 2014-2018 5Global Biodegradable Packaging Materials Market 2014-2018 6Global Biodegradable Packaging Materials Market 2014-2018 7Global Lactic Acid (Biodegradable Polymer, Food & Beverage, Personal Care & Pharmaceutical) Market - Trends & Forecasts to 2019 2The Graphene Opportunity - A Rational View 2The Graphene Opportunity - A Rational View 3The Graphene Opportunity - A Rational View 4
... 28, 2011 Arteriocyte®, a leading clinical stage ... Hopkinton, Massachusetts that develops proprietary stem cell and ... the Food and Drug Administration (FDA) to initiate ... MAR01™ technology in the treatment of Critical Limb ...
... in Spanish and French . , WALNUT ... this fibrous diet consisting mainly of the tough to degrade plant ... to most animals, ruminants manage to extract all they need to ... the cow, or rather the network of organisms working unseen in ...
... of gold nanoparticles and viral particles, woven together and ... a distinctive mix of hard, metallic nanoparticles and ... very stuff of life, DNA marks a remarkable ... materials to create infinitesimal devices. The research, done ...
Cached Biology Technology:Arteriocyte Receives FDA Approval to Move Forward with Critical Limb Ischemia Trial 2Arteriocyte Receives FDA Approval to Move Forward with Critical Limb Ischemia Trial 3How now, inside the cow: Nearly 30,000 novel enzymes for biofuel production improvements 2How now, inside the cow: Nearly 30,000 novel enzymes for biofuel production improvements 3How now, inside the cow: Nearly 30,000 novel enzymes for biofuel production improvements 4How now, inside the cow: Nearly 30,000 novel enzymes for biofuel production improvements 5A mix of tiny gold and viral particles -- and the DNA ties that bind them 2
(Date:8/28/2014)... 2014 Dyslexia, the most commonly diagnosed learning ... reading disability that occurs when the regions of ... normally. , The use of non-invasive functional neuroimaging ... disrupted in dyslexia. However, most prior work has ... regions, leaving a gap in our understanding of ...
(Date:8/28/2014)... Washington, Oregon, northern California, and Alaska totaled 515 million ... 2014, an increase of more than 10 percent compared ... Service,s Pacific Northwest Research Station reported today. During this ... percent to 247 million board feet. , The total ... 5 percent to $390 million in the same quarter, ...
(Date:8/27/2014)... FREMONT, Calif. , Aug. 27, 2014  WaferGen ... completed its previously announced underwritten public offering of units ... $10,000 per unit for gross proceeds of $20 million, ... expenses payable by the Company.  The shares and warrants ... Each unit sold in the offering consists ...
Breaking Biology News(10 mins):Dyslexic readers have disrupted network connections in the brain 2West coast log exports up, lumber exports down in second quarter of 2014 2WaferGen Bio-Systems Announces Successful Completion of Public Offering Raising $20 Million 2WaferGen Bio-Systems Announces Successful Completion of Public Offering Raising $20 Million 3
... N.C. In a finding that confirms what many ... younger women who undergo hysterectomies face a nearly two-fold ... published in the December issue of the journal ... track over time the actual hormonal impact of woman ...
... November 14, 2011 The possibility that functional, ... cells, such as embryonic stem cells (ESCs) and induced ... challenges of stem cell research, but is also one ... regenerative medicine. Developmental biology has played a central role ...
... CLEVELAND -- An estimated 300,000 people in North ... a progressive loss of motor control. Patients with generalized ... uncontrolled twisting and turning in awkward, sometimes painful postures. ... the disorder can have a devastating impact on quality ...
Cached Biology News:Hysterectomy increases risk for earlier menopause among younger women 2Self-organized pituitary-like tissue from mouse ES cells 2Self-organized pituitary-like tissue from mouse ES cells 3Self-organized pituitary-like tissue from mouse ES cells 4University Hospitals Case Medical Center unlocks mystery of dystonia with advanced imaging 2University Hospitals Case Medical Center unlocks mystery of dystonia with advanced imaging 3
Request Info...
NATIVE RAT OSTEOCALCIN...
... Chicken polyclonal to Opsin 1 ( Abpromise ... Antigen: Synthetic peptide: YEDSTHASIFTYT, corresponding to amino ... and synthetic peptide corresponding to amino acids 18/30 ... and used as immunogen. Entrez ...
EnzChek Ultra Xylanase Assay Kit *500 assays*...
Biology Products: