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NANO NEWS
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Perovskite Nanowires Yield Efficient, Tunable Lasers
MADISON, Wis., April 13, 2015 — A “freshman-chemistry-level” technique for growing nanowires produces tunable lasers that are nearly 100 percent efficient. With low lasing thresholds and Q factors around 3600, these single-crystal lead halide perovskite nanowires could be suitable for miniature optoelectronic devices. “While most researchers make these perovskite compounds into thin films for the fabrication of solar cells, we have developed an extremely simple method to grow them into...

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Plasmonic Nanodiscs Boost 2-D Material’s Light Emission
EVANSTON, Ill., April 7, 2015 — Augmenting molybdenum disulfide with plasmonic nanodiscs transforms the 2-D material into a promising light emitter. Researchers at Northwestern and Arizona State universities have found that a periodic array of 130-nm silver discs on top...
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Melody Encoded onto Plasmonic Nanostructure
CHAMPAIGN, Ill., March 17, 2015 — With data storage capacity 5600 times greater than magnetic film, a chip made of tiny gold bow ties could be the next best place to store all your MP3s. Researchers from the University of Illinois at Urbana-Champaign recently created the...

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Photothermal Nanoparticles Extend Range of Optogenetics
CHICAGO, March 12, 2015 — Targeted gold nanoparticles allow light to activate neurons, a finding that could enable the use of optogenetic techniques without genetic manipulation. “This is effectively optogenetics without genetics,” said professor Dr....
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Nanowire Optical Properties Tuned by Alloy Catalyst
BERKELEY, Calif., March 9, 2015 — A new growth catalyst gives greater control over the colors of light emitted by gallium nitride nanowires. Rather than using a single metal, researchers at Lawrence Berkeley National Laboratory used gold-nickel alloys as a catalyst. By...

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Cubic Nanoantennas Eyed for NEMS Biosensors
CLAYTON, Victoria, Australia, Feb. 24, 2015 — Lab-on-a-chip applications could benefit from cubic nanoantennas that direct light more effectively than spherical ones. The cubes, which are composed of insulating rather than conducting or semiconducting materials, are easier to fabricate...
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Organic Solar Cells Unaffected by Nanostructure
RALEIGH, N.C., Feb. 4, 2015 — Bulk heterojunction organic solar cells that are highly organized at the nanoscale are no more efficient at creating free electrons than cells with poorly organized structures. That is the finding of a research team led by North Carolina...

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Nanolaser Detects Biomolecules
YOKOHAMA, Japan, Jan. 13, 2015 — A laser biosensor has demonstrated a simpler way to identify DNA and biomarker proteins via changes in a solution’s surface charge density or pH. A team from Yokohama National University developed the GaInAsP photonic crystal...
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Light Propagation Made Visible in Solar Cells
JÜLICH, Germany, Jan. 2, 2015 — Near-field optical microscopy has provided a glimpse inside the workings of thin-films solar cells, potentially offering a route to optimizing them and other nanophotonic devices. The technique uses a glass fiber tip to measure the amount...

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Fluorescent Dyes Target Disease Genes
JENA, Germany, Dec. 12, 2014 — Fluorescent dye-coated nanoparticles could be used to target and turn off disease-related genes. To test this concept, a team of researchers from Germany and the U.S. developed nanoparticles that interfered with cholesterol production in...
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Transparent Spheres Simplify 3-D Nanolithography
RALEIGH, N.C., Dec. 9, 2014 — A photolithography technique using nanospheres could make fabrication of 3-D structures easier, and at lower costs. The new technique, developed by a team from North Carolina State University and based on oblique illumination of colloidal...

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‘Digital’ Metamaterials Constructed from the Bit Up
PHILADELPHIA, Dec. 2, 2014 — There could be a simpler way to create metamaterials, ultimately leading to light-bending invisibility cloaks and other seemingly impossible devices. A team from the University of Pennsylvania has discovered that a metamaterial with a given...
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JPK Instruments Opens US Office
BERLIN, Dec. 2, 2014 — JPK Instruments, manufacturer of nanoanalytic instrumentation for research in life sciences and soft matter, is set to expand its operations with the opening of a new U.S. office in Carpinteria, Calif., on Jan. 1. Dr. Stefan Kaemmer will...

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Biomarker System Offers Advanced Cancer Detection
SINGAPORE, Nov. 21, 2014 — A combined biomarker and drug delivery system could lead to very localized, more effective cancer treatment. Developed by researchers at Nanyang Technological University, the biomarker detects and makes visible tumor cells by lighting up...
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Metamaterial Polarizing Filter Brightens LCDs, Photos
SALT LAKE CITY, Nov. 21, 2014 — Polarizers are vital for LCDs and photography, but they waste energy by blocking enormous amounts of light. A new filter skirts this obstacle. A team from the University of Utah developed the polarizing filter, which allows more light in to...

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Nanoconstructs Aid Ovarian Cancer Targeting
RIVERSIDE, Calif., Oct. 28, 2014 — Newly developed nanostructures have proven to be effective vehicles for laser imaging and ablation of ovarian cancer cells. A team from the University of California, Riverside, and the University of Texas said their approach facilitated...
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Grant Award Furthers Study of SWIR Light for Detecting Cancer
PISCATAWAY TOWNSHIP, N.J., Oct. 22, 2014 — Detecting cancer as early as possible can be crucial to providing effective treatment. The continuing development of a new imaging method could do just that. A Rutgers University research team, along with scientists from Singapore...

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Magnetic Mirror Reflects Light in New Ways
ALBUQUERQUE, N.M., Oct. 16, 2014 — A new magnetic mirror uses non-metallic metamaterial properties to reflect IR light. Scientists at Sandia National Laboratories developed the magnetic mirror by placing nanoscale antennas at or very near the mirror’s surface, thereby...
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Fluorescent, Magnetic Nanoparticles Aid Bioimaging
CAMBRIDGE, Mass., Oct. 14, 2014 — Nanoparticles that fluoresce to enable tracking in the body can also be precisely manipulated with magnetic fields. Manipulating the particles with electromagnets is key to using them in biological research because the tiny particles could...

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Plasmon Laser Demonstrates Fastest Switching Speed
LONDON and JENA, Germany, Oct. 9, 2014 — A new plasmon semiconductor laser has demonstrated ultrafast switching speeds and is being touted as the world’s fastest. The laser was created at Imperial College London and Friedrich Schiller University Jena using semiconductor...
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Superresolution Microscopy Pioneers Win Nobel Prize in Chemistry
STOCKHOLM, Sweden, Oct. 8, 2014 — Circumventing the diffraction limit to achieve nanoscale microscope images has earned Eric Betzig, Stefan W. Hell and W.E. Moerner the 2014 Nobel Prize in Chemistry. Hell, director of the Max Planck Institute for Biophysical Chemistry in...

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Optical Switch Turns Polarization Into Direction
VIENNA, Oct. 7, 2014 — A single gold nanoparticle can translate light polarization into direction of propagation within ultrathin glass fiber. This “chiral waveguide coupler” can direct up to 94 percent of incident light in the desired direction, and...
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Nanopillars Enhance Solar Efficiency
AMHERST, Mass., Oct. 3, 2014 — Mimicking the highly efficient light-harvesting structures of blades of grass could boost power-conversion efficiency in solar panels. “For decades, scientists and engineers have placed great effort in trying to control the morphology...

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Photons Ride Optomechanical ‘Seesaw’
MINNEAPOLIS, Oct. 3, 2014 — A nanoscale “seesaw” that shuttles photons back and forth could present an optomechanical alternative for computing and sensing applications. On either side of the seesaw are photonic crystal cavities to capture photons. Optical...
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All-Metal Detector has Ultranarrow Absorption Band
EVANSTON, Ill., Oct. 2, 2014 — A new all-metal photodetector with an ultranarrow absorption band could lead to biosensors with greater sensitivity than ever. The device achieved a bandwidth of 12 nm by exploiting plasmonic surface lattice resonances of nanowire and...






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