Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Plasmon Bands in Gold-Silver Nanorods

Researchers from The Chinese University of Hong Kong have shown that there are four plasmon bands in (Au core)−(Ag shell) nanorods.
Researchers from The Chinese University of Hong Kong have shown that there are four plasmon bands in (Au core)−(Ag shell) nanorods.

Abstract:
Localized surface plasmon resonances have recently received intense attention due to their intriguing and complex optical properties. Gold and silver nanostructures, which produce resonances located in the visible range and are stable under ambient conditions, have been studied extensively from fundamental sciences aspects as well as due to their numerous potential applications. Both materials have their advantages. Silver nanocrystals exhibit larger field enhancements, higher refractive index sensitivities, and larger solar energy conversion efficiencies than gold nanocrystals. However, gold nanostructures show tunable longitudinal plasmon wavelengths, are chemically stable and facile growth methods exist. (Gold core) − (silver shell) nanostructures with different shapes have been fabricated to combine these advantages and to allow for tailoring of the plasmon wavelengths by varying the thickness. However, the exact nature of the plasmonic properties of these structures has not been investigated systematically and still remains controversial.

Plasmon Bands in Gold-Silver Nanorods

Germany | Posted on September 20th, 2012

Now, Jianfang Wang and co-workers from The Chinese University of Hong Kong have for the first time unraveled the nature of the plasmon bands on gold-silver nanorods. They started with two differently sized gold nanorods and coated them with silver shells with systematically varied thicknesses. The evolution of the plasmon bands, their peak wavelengths and extinction intensities as functions of the shell thickness were studied. The nature of each plasmon band was determined unambiguously with finite-difference time-domain (FDTD) simulations. This first systematical study on the plasmon resonances of gold-silver nanorods will be useful for the construction of optical devices as well as for plasmon-enhanced spectroscopy techniques.

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

Measuring the Smallest Magnets July 28th, 2014

WITec to host the 11th Confocal Raman Imaging Symposium from September 29th - October 1st in Ulm, Germany July 28th, 2014

FEI adds Phase Plate Technology and Titan Halo TEM to its Structural Biology Product Portfolio: New solutions provide the high-quality imaging and contrast necessary to analyze the 3D structure of molecules and molecular complexes July 28th, 2014

Imaging

WITec to host the 11th Confocal Raman Imaging Symposium from September 29th - October 1st in Ulm, Germany July 28th, 2014

FEI adds Phase Plate Technology and Titan Halo TEM to its Structural Biology Product Portfolio: New solutions provide the high-quality imaging and contrast necessary to analyze the 3D structure of molecules and molecular complexes July 28th, 2014

Discoveries

Seeing is bead-lieving: Rice University scientists create model 'bead-spring' chains with tunable properties July 28th, 2014

Measuring the Smallest Magnets July 28th, 2014

Production of Toxic Gas Sensor Based on Nanorods July 28th, 2014

Stanford team achieves 'holy grail' of battery design: A stable lithium anode - Engineers use carbon nanospheres to protect lithium from the reactive and expansive problems that have restricted its use as an anode July 27th, 2014

Announcements

Measuring the Smallest Magnets July 28th, 2014

WITec to host the 11th Confocal Raman Imaging Symposium from September 29th - October 1st in Ulm, Germany July 28th, 2014

FEI adds Phase Plate Technology and Titan Halo TEM to its Structural Biology Product Portfolio: New solutions provide the high-quality imaging and contrast necessary to analyze the 3D structure of molecules and molecular complexes July 28th, 2014

Production of Toxic Gas Sensor Based on Nanorods July 28th, 2014

Tools

WITec to host the 11th Confocal Raman Imaging Symposium from September 29th - October 1st in Ulm, Germany July 28th, 2014

FEI adds Phase Plate Technology and Titan Halo TEM to its Structural Biology Product Portfolio: New solutions provide the high-quality imaging and contrast necessary to analyze the 3D structure of molecules and molecular complexes July 28th, 2014

Bruker Announces Acquisition of High-Speed, 3D Super-Resolution Fluorescence Microscopy Company Vutara July 28th, 2014

Malvern Instruments completes acquisition of MicroCal and announces purchase of Archimedes product from Affinity Biosensors July 25th, 2014

Photonics/Optics/Lasers

NUS scientists use low cost technique to improve properties and functions of nanomaterials: By 'drawing' micropatterns on nanomaterials using a focused laser beam, scientists could modify properties of nanomaterials for effective applications in photonic and optoelectric applicat July 22nd, 2014

Carbyne morphs when stretched: Rice University calculations show carbon-atom chain would go metal to semiconductor July 21st, 2014

Tiny laser sensor heightens bomb detection sensitivity July 19th, 2014

Future Electronics May Depend on Lasers, Not Quartz July 17th, 2014

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 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE