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nanoparticles Features
Nanoparticles: Probing the Plasma Threshold
Laser-induced plasma generation in nanoparticles has potential application in fields as diverse as medicine and materials processing. To fully harness this tool, it is important to understand how nanoparticles behave in strong laser fields and how...
Photonics Spectra, April 2015
Hybrid Fabrication Makes Better Plasmonic Nanostructures for SERS
Monolithic hierarchical plasmonic nanostructures improve results from surface-enhanced Raman spectroscopy. Plasmonic nanostructures of gold and silver have emerged as attractive nanomaterials because of their small size, corrosion resistance,...
Photonics Spectra, August 2013
Transformation Optics Bends all the Rules
From invisibility cloaks to hyperlenses, and photovoltaic concentrators to superresolution microscopy, transformation optics makes big promises. In the same way that water flows can be manipulated using dams and channels, light can be made to...
Photonics Spectra, August 2011
Beaming through to NOVEL USES for HOLOGRAPHY
Typically, green, simple three-dimensional images of objects on flat paper are not unknown to today’s kids – or to anyone who has grown up during the past few decades. We encountered them first as wonderments – optical tricks that astounded and...
Photonics Spectra, February 2010
Socks with Nanosilver Could Present Problems
The saying “It all comes out in the wash” could take on a whole new meaning as nanoparticles become more common in consumer goods. Using scanning and transmission electron microscopy, Troy M. Benn and Paul K. Westerhoff of Arizona State University...
Photonics Spectra, June 2008
Ivy’s Secret Is in Its Secretions
As anyone knows who has ever been to Wrigley Field in Chicago, ivy climbs, it covers and it spreads over almost anything in its path. The plant’s famed surface-climbing ability has made it a fixture in country gardens, on urban buildings and in...
Photonics Spectra, May 2008
Photocurrent Altered with Nanoparticles
Sprinkling nanoparticles over the active face of photodetectors and solar cells could be a relatively easy and inexpensive way to enhance the performance of these devices. But exactly what effect do these tiny particles have, and what size,...
Photonics Spectra, March 2008
Tracking Nanoparticles the Easy Way
Visualizing single nanoparticles and following them in three dimensions is useful for scientific applications ranging from examining biological cells to studying mixing in microfluidics. However, tracking nanoparticles in 3-D requires imaging...
Photonics Spectra, August 2007
Speedy Spectroscopy of Single Nanoparticles
Nanoparticles present distinct research problems. Because of variations among production batches, investigators tend to choose to study individual particles. Doing so, however, is technically challenging, and it is difficult to generate meaningful...
Photonics Spectra, July 2007
Substrates Tuned for Surface-Enhanced Raman Scattering
Researchers at the University of Victoria in British Columbia, Canada, have demonstrated that a wet chemistry technique for depositing layers of gold nanoparticles and linker molecules can optimize the Raman scattering signal from an absorbed sample...
Photonics Spectra, November 2006
Titanium Nanoparticles Produced by Laser Ablation in Liquid Are Studied
As applications of nanoscale materials continue to be developed, a fundamental understanding of how changes in the processes that create those materials affect their resulting properties is required. To that end, A. Welford Castleman Jr. and Justin...
Photonics Spectra, October 2006
Making Gold in a Polyvinyl Alcohol Film
Fabricating gold nanoparticles in a polymer film by laser excitation is not new, but the problem has been that the high energy of the laser can damage the thin film. Researchers at Osaka University in Japan were interested in this method, however,...
Photonics Spectra, August 2006
(12 results found)
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