Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

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

How to maximize the superconducting critical temperature in a molecular superconductor: International team led by Tohoku University opens new route for discovering high Tc superconductors April 19th, 2015

Engineer improves rechargeable batteries with MoS2 nano 'sandwich' April 18th, 2015

Nanocomposites Play Effective Role in Production of Smart Fibers April 18th, 2015

Dais Analytic Corporation Appoints Eliza Wang to Board of Directors: Company's Newest Director Brings Expertise in Commercial and Legal Matters Both in the United States and China; Joins on the Heels of Successful Business Development Trade Mission to China April 18th, 2015

Sensors

Optical resonance-based biosensors designed for medical applications April 18th, 2015

MIT sensor detects spoiled meat: Tiny device could be incorporated into 'smart packaging' to improve food safety April 15th, 2015

Graphene pushes the speed limit of light-to-electricity conversion: Researchers from ICFO, MIT and UC Riverside have been able to develop a graphene-based photodetector capable of converting absorbed light into an electrical voltage at ultrafast timescales April 14th, 2015

Iranian Scientists Evaluate Dynamic Interaction between 2 Carbon Nanotubes April 14th, 2015

Discoveries

How to maximize the superconducting critical temperature in a molecular superconductor: International team led by Tohoku University opens new route for discovering high Tc superconductors April 19th, 2015

Optical resonance-based biosensors designed for medical applications April 18th, 2015

Iranian Foodstuff, Agricultural Industries Welcome Nanotechnology Packaging Bags April 18th, 2015

Nanocomposites Play Effective Role in Production of Smart Fibers April 18th, 2015

Announcements

How to maximize the superconducting critical temperature in a molecular superconductor: International team led by Tohoku University opens new route for discovering high Tc superconductors April 19th, 2015

Iranian Foodstuff, Agricultural Industries Welcome Nanotechnology Packaging Bags April 18th, 2015

Nanocomposites Play Effective Role in Production of Smart Fibers April 18th, 2015

Dais Analytic Corporation Appoints Eliza Wang to Board of Directors: Company's Newest Director Brings Expertise in Commercial and Legal Matters Both in the United States and China; Joins on the Heels of Successful Business Development Trade Mission to China April 18th, 2015

Printing/Lithography/Inkjet/Inks

The microscopic topography of ink on paper: Researchers have analyzed the varying thickness of printed toner in unprecedented 3-D detail, yielding insights that could lead to higher quality, less expensive and more environmentally-friendly glossy and non-glossy papers April 14th, 2015

Inkjet-printed liquid metal could bring wearable tech, soft robotics April 8th, 2015

Perpetuus Advanced Materials secures landmark commercial agreement with global technology group Heraeus: Perpetuus will supply innovative alternatives to existing silver and copper-based inks and pastes April 2nd, 2015

Haydale Announce Dedicated Graphene Inks Manufacturing Capability March 25th, 2015

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







© Copyright 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE