Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Imaging of surface plasmons may be a lot easier than you thought

Surface plasmon patterns can be imprinted on metallic nanostructures for subsequent high resolution imaging with standard surface probe techniques.
Surface plasmon patterns can be imprinted on metallic nanostructures for subsequent high resolution imaging with standard surface probe techniques.

Abstract:
An unusual observation turned into a scientific breakthrough when K.U.Leuven researchers investigating the optical properties of nanomaterials discovered that so-called surface plasmons leave imprints on the surface of the nanostructures. This leads to a new type of high resolution microscopy for imaging the electric fields of nanostructures.

Imaging of surface plasmons may be a lot easier than you thought

Leuven, Belgium | Posted on June 8th, 2011

Nanomaterials, consisting of extremely small particles or thin layers, tend to acquire unexpected properties. Optical nanomaterials are a class of materials that have emerged over the last ten years and that have quickly become a hot topic in material science due to their counterintuitive optical behavior and revolutionary potential applications. Optical nanomaterials are mainly based on surface plasmon resonances - the property whereby, in metallic nanostructures, light can collectively excite surface electron waves. These electron waves have the same frequency as light, but much shorter wavelengths, which allow their manipulation at the nanoscale. In other words, with the help of plasmons, light can be captured, modified and even stored in nanostructures. This emerging technology finds applications in surprising areas, ranging from cancer treatment (by targeting cancer cells with nanoparticles that will produce heat when excited) to invisibility (by causing light to follow a trail of nanoparticles, that acts as an invisibility cloak to whatever is underneath them).

The imaging of surface plasmons provides a direct way to map and understand the local electric fields that are responsible for the unusual electromagnetic properties of optical nanomaterials. However, the imaging of surface plasmons is quite challenging. While there are methods to image plasmons with high resolution, they come at a considerable increase in both cost and complexity. But now, Ventsislav K. Valev and his colleagues have demonstrated a powerful and user friendly method for imaging plasmonic patterns in nanostructures.

"We were performing routine characterization of freshly grown samples, when I asked Yogesh, one of our Ph.D. students, to look at a sample that had already been studied. There was absolutely no reason to do this; I just had a hunch," sais Ventsislav Valev. "Surprisingly, this sample appeared to be decorated and I immediately recognized the pattern. Somehow, the optical properties have been imprinted on the surface of the nanostructures."

The scientists indeed found out that upon illuminating nanostructures made of nickel or palladium, the resulting surface plasmon pattern is imprinted on the structures themselves. This imprinting is done through displacing material from the nanostructure to the regions where the plasmon enhancements are the largest. In this manner, the plasmons are effectively decorated, allowing for subsequent imaging with standard surface probe techniques, such as scanning electron microscopy or atomic force microscopy. The imprinting method is quite unique, combining aspects of both imaging and writing techniques.

This research is described in an upcoming paper in the journal Physical Review Letters.

Full bibliographic information

V. K. Valev, A. V. Silhanek, Y. Jeyaram, D. Denkova, B. De Clercq, V. Petkov, X. Zheng, V. Volskiy, W. Gillijns, G. A. E. Vandenbosch, O. A. Aktsipetrov, M. Ameloot, V. V. Moshchalkov and T. Verbiest, "Hotspot Decorations Map Plasmonic Patterns with the Resolution of Scanning Probe Techniques", Phys. Rev. Lett. 106, 226803 (2011), prl.aps.org/abstract/PRL/v106/i22/e226803.

####

For more information, please click here

Contacts:
Griet Van der Perre
+32 16 32 40 08

Copyright © AlphaGalileo

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

“Hotspot Decorations Map Plasmonic Patterns with the Resolution of Scanning Probe Techniques”, Phys. Rev. Lett. 106, 226803 (2011)

Related News Press

News and information

Stability of perovskite solar cells reaches next milestone January 27th, 2023

Qubits on strong stimulants: Researchers find ways to improve the storage time of quantum information in a spin rich material January 27th, 2023

UCF researcher receives Samsung International Global Research Outreach Award: The award from the multinational electronics corporation will fund the development of infrared night vision and thermal sensing camera technology for cell phones and consumer electronics January 27th, 2023

Temperature-sensing building material changes color to save energy January 27th, 2023

Imaging

Wafer-scale 2D MoTe₂ layers enable highly-sensitive broadband integrated infrared detector January 6th, 2023

Shrinking hydrogels enlarge nanofabrication options: Researchers from Pittsburgh and Hong Kong print intricate, 2D and 3D patterns December 29th, 2022

New X-ray imaging technique to study the transient phases of quantum materials December 29th, 2022

Rapid fluorescent mapping of electrochemically induced local pH changes December 9th, 2022

Discoveries

One of the causes of aggressive liver cancer discovered: a 'molecular staple' that helps repair broken: DNA Researchers describe a new DNA repair mechanism that hinders cancer treatment January 27th, 2023

Stability of perovskite solar cells reaches next milestone January 27th, 2023

Qubits on strong stimulants: Researchers find ways to improve the storage time of quantum information in a spin rich material January 27th, 2023

Temperature-sensing building material changes color to save energy January 27th, 2023

Announcements

UCF researcher receives Samsung International Global Research Outreach Award: The award from the multinational electronics corporation will fund the development of infrared night vision and thermal sensing camera technology for cell phones and consumer electronics January 27th, 2023

Temperature-sensing building material changes color to save energy January 27th, 2023

Quantum sensors see Weyl photocurrents flow: Boston College-led team develops new quantum sensor technique to image and understand the origin of photocurrent flow in Weyl semimetals January 27th, 2023

Department of Energy announces $9.1 million for research on quantum information science and nuclear physics: Projects span the development of quantum computing, algorithms, simulators, superconducting qubits, and quantum sensors for advancing nuclear physics January 27th, 2023

Tools

Shrinking hydrogels enlarge nanofabrication options: Researchers from Pittsburgh and Hong Kong print intricate, 2D and 3D patterns December 29th, 2022

Rapid fluorescent mapping of electrochemically induced local pH changes December 9th, 2022

Quantum-Si’s next-generation single-molecule protein sequencing technology published in Science, signaling new era of life science and biomedical research: Semiconductor chip and Time Domain Sequencing™ technology will advance drug discovery and diagnostics, enabling people to li October 14th, 2022

ACM Research Launches New Furnace Tool for Thermal Atomic Layer Deposition to Support Advanced Semiconductor Manufacturing Requirements: Ultra Fn A Furnace Tool Shipped to China-Based Foundry Customer September 30th, 2022

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




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project