Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Large-Area Low-Cost Gold Nanostructures through Colloidal Nanolithography

Abstract:
Plasmonics nanostructures can generate exceptionally large optical field enhancements in cubic-nanometer volumes which can be utilized to construct highly sensitive sensors based on localized surface plasmon resonances. When designed with the appropriate geometry, metallic nanostructures exhibit narrow resonances, so called Fano resonances. These resonances can provide enhanced sensitivity which easily reach or even exceed the best known plasmonic responses of single plasmonic particles.

Large-Area Low-Cost Gold Nanostructures through Colloidal Nanolithography

Germany | Posted on September 20th, 2012

One suitable geometry to generate such resonances is the asymmetric double split-ring resonator, where two curved nanostructures with different lengths are facing each other. Several examples of asymmetric split-ring resonator structures have been demonstrated with various applications including biosensors, lasing spasers, coherent plasmon emitters, and tunable metamaterials. However, the wide use of Fano sensors has been hampered by two issues: the availability of low-cost light sources, and the ability to mass-produce Fano sensors over large areas at low cost.

Jun Zhao, Harald Giessen, and coworkers (University of Stuttgart) have now developed a method to fabricate asymmetric split-ring resonators over a large area at low cost using colloidal nanolithography in combination with angled evaporation. The fabricated samples exhibit sharp and narrow optical Fano resonances in the near infrared, which are well suited for localized surface plasmon resonance refractive index sensing with atto- or zeptoliter volumes. A strong improvement of the shape and the modulation depth of the Fano resonances could be achieved through reshaping of the metal by annealing the sample at 150C. The presented method is very flexible towards other structure geometries, scalable to even larger areas, very reproducible, and adaptable for other substrate materials and metals. This technique will pave the way towards wide utilization of plasmonic sensing applications.

The research was reported in Advanced Optical Materials, a new section in Advanced Materials dedicated to breakthrough discoveries and fundamental research in photonics, plasmonics, metamaterials, and more, covering all aspects of light-matter interactions.

####

For more information, please click here

Copyright © Wiley-VCH Materials Science Journals

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Link to the original paper on Wiley Online Library:

To get Advanced Optical Materials email alerts click here:

Related News Press

News and information

Ultracold atom waves may shed light on rogue ocean killers: Rice quantum experiments probe underlying physics of rogue ocean waves April 27th, 2017

Looking for the quantum frontier: Beyond classical computing without fault-tolerance? April 27th, 2017

Metal nanoparticles induced visible-light photocatalysis: Mechanisms, applications, ways of promoting catalytic activity and outlook April 27th, 2017

Arrowhead Pharmaceuticals to Webcast Fiscal 2017 Second Quarter Results April 27th, 2017

Sensors

Better living through pressure: Functional nanomaterials made easy April 19th, 2017

A Sensitive And Dynamic Tactile Sensor Read more from Asian Scientist Magazine at: https://www.asianscientist.com/2017/04/tech/tactile-3d-active-matrix-sensor/ April 18th, 2017

AIM Photonics Presents Cutting-Edge Integrated Photonics Technology Developments to Packed House at OFC 2017, the Optical Networking and Communication Conference & Exhibition April 11th, 2017

New technology could offer cheaper, faster food testing: Specialized droplets interact with bacteria and can be analyzed using a smartphone April 7th, 2017

Discoveries

Ultracold atom waves may shed light on rogue ocean killers: Rice quantum experiments probe underlying physics of rogue ocean waves April 27th, 2017

Looking for the quantum frontier: Beyond classical computing without fault-tolerance? April 27th, 2017

Metal nanoparticles induced visible-light photocatalysis: Mechanisms, applications, ways of promoting catalytic activity and outlook April 27th, 2017

Geoffrey Beach: Drawn to explore magnetism: Materials researcher is working on the magnetic memory of the future April 25th, 2017

Announcements

Ultracold atom waves may shed light on rogue ocean killers: Rice quantum experiments probe underlying physics of rogue ocean waves April 27th, 2017

Looking for the quantum frontier: Beyond classical computing without fault-tolerance? April 27th, 2017

Metal nanoparticles induced visible-light photocatalysis: Mechanisms, applications, ways of promoting catalytic activity and outlook April 27th, 2017

Arrowhead Pharmaceuticals to Webcast Fiscal 2017 Second Quarter Results April 27th, 2017

Printing/Lithography/Inkjet/Inks/Bio-printing

Liquid metal nano printing set to revolutionize electronics: Creating integrated circuits just atoms thick February 18th, 2017

New stem cell technique shows promise for bone repair January 25th, 2017

NUS researchers achieve major breakthrough in flexible electronics: New classes of printable electrically conducting polymer materials make better electrodes for plastic electronics and advanced semiconductor devices January 14th, 2017

Nanowire 'inks' enable paper-based printable electronics: Highly conductive films make functional circuits without adding high heat January 4th, 2017

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project