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nanoparticles News
Plasmonics Promising for Optically Induced Electronics
HOUSTON, Oct. 12, 2012 — Nanoscale plasmonic antennas, or nonamers, attached to graphene could theoretically create on-demand electronic circuits by hitting them with light at particular frequencies.
Low-Power Nanotweezers May Benefit Cell Studies
URBANA-CHAMPAIGN, Ill., Oct. 1, 2012 — Low-power optical tweezers can trap, manipulate and analyze nanoparticles — including delicate biological samples — new work demonstrates.
Nanoparticles Enable Drug Activation by NIR Light
SINGAPORE, Sept. 28, 2012 — Nanoparticles that convert near-infrared to ultraviolet or visible light could help overcome the skin penetration limits of conventional photodynamic therapy.
Glowing Molecules Turn On, Off to Visualize Cell Activity
CORAL GABLES, Fla., Aug. 17, 2012 — Using UV light to switch fluorescent molecules on and off in aqueous environments could help scientists develop better fluorescent probes for biomedical research.
First Full-Color Image at 100,000 dpi
SINGAPORE, Aug. 14, 2012 — A method of printing metal-laced, nanometer-sized structures has created full-color images at 100,000 dots per inch, revolutionizing the way images are printed. The technology could be further developed for high-resolution reflective color displays...
Electricity-Generating Transparent Solar Cells Developed
LOS ANGELES, Aug. 2, 2012 — A newly developed transparent polymer solar cell capable of generating electricity could bring us a step closer to a future in which windows in buildings and homes generate electricity from the sun without blocking the view outside.
Plasmonic Chains Act Like Polymers
HOUSTON, July 16, 2012 — New research that seeks to establish points of reference between plasmonic particles and polymers might lead to smaller computer chips, better antennae and improvements in optical computing.
Nanoparticles Coaxed into Self-Assembly
BERKELEY, Calif., May 15, 2012 — A simple and inexpensive technique directs the self-assembly of nanoparticles into device-ready materials and has applications in fields including computer memory storage, energy storage and harvesting, remote sensing, catalysis, light management...
Nanoparticle-Laser Method Targets Chemo Drugs
HOUSTON, April 10, 2012 — A potential treatment method for drug-resistant cancer uses gold nanoparticles to convert laser energy into “plasmonic nanobubbles,” which allow chemotherapy drugs to enter single cells. Delivering chemotherapy with nanobubbles is 30 times more...
Quantum Plasmon Resonance Illuminated
STANFORD, Calif., March 29, 2012 — Plasmon resonance at the nanoscale, the phenomenon responsible for the vibrant hues of stained-glass windows, can kill cancer cells and has the potential to drive forward quantum optics and bioimaging, new research suggests. Plasmon resonance is...
Material glows in NIR for two weeks
ATHENS, Ga. – Move over, cheesy glow-in-the-dark plastic toys that take forever to “charge up” with light and that fade to black in a blink. A new material can emit a near-infrared glow for two weeks after a single minute of exposure to sunlight, or...
Doped Nanocrystals Developed for Bioimaging
SINGAPORE, Nov. 23, 2011 — A synthesis of lanthanide-doped core-shell nanocrystals has resulted in advanced light-control properties for bioimaging applications including cancer diagnostics, medical imaging and therapeutic delivery. A research team from the National...
New Material Emits Long-Lasting NIR Light
ATHENS, Ga., Nov. 22, 2011 — While visible-light emitters are commonplace, there has been little success in creating materials that emit light in the near-infrared (NIR) — until now. A new material developed at the University of Georgia emits a NIR glow for two...
Plasmonic Nanotweezers Keep Cool
CAMBRIDGE, Mass., Sept. 28, 2011 — A new instrument dubbed a plasmonic nanotweezer creates strong forces more efficiently than traditional optical tweezers and eliminates a problem that caused earlier setups to overheat. It may make it easier to isolate and study tiny particles such...
Subwavelength Antenna Separates Colors of Light
GOTHENBURG, Sweden, Sept. 27, 2011 — A nanoantenna smaller than the wavelength of light has been built that can direct red and blue colors in opposite directions. The finding could lead to optical nanosensors that can detect very low concentrations of gases or biomolecules. A...
Parabolic Mirrors Power Solar Lasers
COLLEGE PARK, Md., Sept. 16, 2011 — By borrowing from modern telescope design, researchers in Uzbekistan said they can boost the efficiency of solar-pumped lasers to 35 percent. Such lasers today typically only achieve 1 to 2 percent efficiency rates, and a boost would also provide a...
Transformation Optics Bends all the Rules
Aug 1, 2011 — 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...
New Nanomaterials Control, Direct Light Energy
TORONTO, Canada, July 18, 2011 — Inspired by photosynthesis, researchers have engineered a new generation of nanomaterials that control and direct the energy absorbed from light. "Nanotechnologists have for many years been captivated by quantum dots — particles of...
Tiny Ring Laser Detects, Counts Nanoparticles
ST. LOUIS, June 29, 2011 — A tiny doughnut-shaped laser is the latest marvel of silicon microminiaturization, but instead of manipulating bits, it detects very small particles. Small particles play a big — and largely unnoticed — role in our everyday lives. Virus...
FDA Approves Human Trials of Cornell Dots
Jun 20, 2011 — NEW YORK, June 20, 2011 — The first clinical trial in humans of a new technology called Cornell Dots — brightly glowing nanoparticles that can light up cancer cells in PET-optical imaging — has been approved by the FDA. The new...
Lasers Form 3-D Nanoparticle Crystals
ANN ARBOR, Mich., June 7, 2011 — Three-dimensional optically induced crystals have been created by manipulating thousands of microscopic plastic spheres trapped by laser-generated electric fields. The technique could someday be used to analyze the structure of materials of...
Novel nanoparticles change color
COLUMBUS, Ohio – Tiny polymeric containers stuffed with red and green quantum dots promise to provide continuous light for biomedical imaging. Engineers at Ohio State University have invented nanoparticles that, somewhat unusually, glow red, green or yellow...
Flower Power: Fractal Flowers Could Help Return Eyesight
EUGENE, Ore., May 9, 2011 — University of Oregon researcher Richard Taylor is on a quest to grow “flowers” – seeded from nanoparticles – that will help people who have lost their sight to see again. These flowers are not roses or tulips but fractals...
‘Spincasting’ Could Influence Optics
RALEIGH, N.C., April 8, 2011 — A technique called “spincasting,” which uses centrifugal force to distribute a liquid onto a solid substrate, is being investigated with the hope that it can create thin films of nanoparticles on an underlying substrate for optics and...
SERS Advances Disease Diagnosis
DURHAM, N.C., March 3, 2011 — Scientists at Duke University have developed a new noninvasive optical technique that uses a laser to peer into the genetic material of cells, enabling the detection of early-stage cancer and other diseases. The method uses metallic nanoparticles...
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May 2024
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