Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Imecís novel strategy to tune plasmon resonances has potential applications in biomolecular detection

Schematic illustration of various shapes of plasmonic nanostructures and (bottom) the corresponding electron microscopy images.
Schematic illustration of various shapes of plasmonic nanostructures and (bottom) the corresponding electron microscopy images.

Abstract:
Researchers at imec have developed an innovative strategy to tune plasmon resonances. They do so by breaking the symmetric geometry of the nanostructures, using a combination of bottom-up and top-down fabrication processes. Such broken symmetry can lead to strongly enhanced local electric fields. A potential application is the detection of biomolecules via surface-enhanced Raman scattering (SERS).

Imecís novel strategy to tune plasmon resonances has potential applications in biomolecular detection

The Netherlands | Posted on April 21st, 2010

Metal-based nanophotonics (plasmonics) is a field concerned with manipulating and focusing light on nanoscale structures that are much smaller than conventional optic components. Plasmonic technology, today still in an experimental stage, has the potential to be used in future applications such as nanoscale optical interconnects for high performance computer chips, highly efficient thin-film solar cells, and extremely sensitive (bio)molecular sensors.

Plasmonic applications can be made from nanostructured (noble) metals. When such nanostructures are illuminated with visible to near-infrared light, the excitation of collective oscillations of conduction electrons - called surface plasmons - generates strong optical resonances, focusing electromagnetic energy in deep-sub-wavelength-scales. The resonance spectra of the metallic nanostructures strongly depend on their geometry. Imec has extensive experience in synthesizing various shapes of nanostructures to tune the resonances from the ultraviolet to the near-infrared region. Examples of such shapes are nanospheres, nanocubes, nanorods, nanoshells, and nanorings.

Recently, researchers at imec have developed an innovative strategy to precisely tune the plasmon resonances. They do so by breaking the symmetric geometry of the nanostructures, using a combination of bottom-up and top-down fabrication processes. This allows making a geometrical transition from nanocubes to nanoplates (see Jian Ye, et al. Nanotechnology, 2008, 19, 325702), from nanoshells to semishells and nanobowls (see Jian Ye, et al. the Journal of Physical Chemistry C, 2009, 113, 3110; Jian Ye, et al. Langmuir, 2009, 25, 1822; Jian Ye, et al. ACS Nano, 2010, 4, 1457), from nanocages to open-nanocages (see Jian Ye, et al. Optics Express, 2009, 17, 23765).

Combining bottom-up and top-down fabrication turns out to be a cost-effective method to obtain large areas covered with engineered metal nanostructures. The nano-dimensions are still set by the bottom-up fabrication procedures, and the geometrical tweaking occurs through well-characterized top-down fabrication techniques such as metal evaporation and ion milling.

Imec has gained a substantial insight in the optical properties of these nanostructures using a combination of electromagnetic simulations and advanced optical spectroscopy. This allows explaining the optical properties using the so-called plasmon hybridization model, where the resonances of complex nanostructures can be described as bonding and anti-bonding arrangements of the parent plasmon resonances of the individual constituents. This paves the way to tweaking the optical properties of metal nanostructures for various applications. More specifically, the broken symmetry can lead to strongly enhanced local electric fields, which show a potential application in surface-enhanced Raman scattering-based bio-molecular detection.

####

About imec
Imec is Europeís largest independent research center in nanoelectronics and nano-technology. Its staff of more than 1,750 people includes over 550 industrial residents and guest researchers. Imecís research is applied in better healthcare, smart electronics, sustainable energy, and safer transport.

For more information, please click here

Copyright © imec

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 News Press

News and information

Sol-gel capacitor dielectric offers record-high energy storage July 30th, 2015

Controlling Dynamic Behavior of Carbon Nanosheets in Structures Made Possible July 30th, 2015

Newly-Developed Polymers Control Size of Nanoparticles during Production Process July 30th, 2015

Detecting small metallic contaminants in food via magnetization: A practical metallic-contaminant detecting system using three high-Tc RF superconducting quantum interference devices (SQUIDs) July 29th, 2015

Thin films

Iranian Scientists Create Best Conditions for Synthesis of Gold Nanolayers July 23rd, 2015

ORNL researchers make scalable arrays of 'building blocks' for ultrathin electronics July 22nd, 2015

Industrial Nanotech, Inc. Introduces Ultra Thin High Performance Thermal Insulation Film for Cooling Personal Electronic Devices July 21st, 2015

Imec Makes Steady Progress on Perovskite Photovoltaic Module reaching a Record 11 Percent Conversion Efficiency July 16th, 2015

Possible Futures

Smaller, faster, cheaper: A new type of modulator for the future of data transmission July 27th, 2015

Researchers predict material with record-setting melting point July 27th, 2015

Global Corrosion Resistant Nano Coatings Market To 2015: Acute Market Reports July 27th, 2015

Global Zinc oxide nanopowders Industry 2015: Acute Market Reports July 25th, 2015

Nanomedicine

Sol-gel capacitor dielectric offers record-high energy storage July 30th, 2015

Newly-Developed Polymers Control Size of Nanoparticles during Production Process July 30th, 2015

March 2016; 6th Int'l Conference on Nanostructures in Iran July 29th, 2015

Non-Enzyme Sensor Determines Level of Blood Sugar July 29th, 2015

Nanobiotechnology

New computer model could explain how simple molecules took first step toward life: Two Brookhaven researchers developed theoretical model to explain the origins of self-replicating molecules July 28th, 2015

Spintronics: Molecules stabilizing magnetism: Organic molecules fixing the magnetic orientation of a cobalt surface/ building block for a compact and low-cost storage technology/ publication in Nature Materials July 25th, 2015

Programming adult stem cells to treat muscular dystrophy and more by mimicking nature July 22nd, 2015

Biophotonics - Global Strategic Business Report 2015 July 21st, 2015

Photonics/Optics/Lasers

March 2016; 6th Int'l Conference on Nanostructures in Iran July 29th, 2015

Controlling phase changes in solids: Controlling phase changes in solids July 29th, 2015

Perfect Optical Properties in Production of Aluminum Oxide Colloid Nanoparticles July 28th, 2015

Short wavelength plasmons observed in nanotubes: Berkeley Lab researchers create Ludinger liquid plasmons in metallic SWNTs July 28th, 2015

Solar/Photovoltaic

Reshaping the solar spectrum to turn light to electricity: UC Riverside researchers find a way to use the infrared region of the sun's spectrum to make solar cells more efficient July 27th, 2015

Rice University finding could lead to cheap, efficient metal-based solar cells: Plasmonics study suggests how to maximize production of 'hot electrons' July 22nd, 2015

Perovskite solar technology shows quick energy returns: New technology beats current solar panel technology in life-cycle energy assessment July 20th, 2015

Nanowires give 'solar fuel cell' efficiency a tenfold boost: Eindhoven researchers make important step towards a solar cell that generates hydrogen July 17th, 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