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Spectroscopy News
Femtosecond Laser Offers Solution for Dissolving Acid
Dec 1, 2002 — Dissolving acids in aqueous media is a fundamental process in many areas of chemistry. One process of interest is the acid ionization of hydrogen bromide in water. In the past, scientists believed that the minimum number of water molecules needed to solvate the molecule and form the contact ion pair in isolated complexes was four. However, a team at Pennsylvania State University in University Park using femtosecond spectroscopy discovered that a fifth is needed to complete the process....
InGaN Alloys May Yield Full-Spectrum Solar Cells
Dec 1, 2002 — A team of scientists at the University of California, Berkeley, Lawrence Berkeley National Laboratory, also in Berkeley, and at Cornell University in Ithaca, N.Y., has reported that the bandgap energy of InN is approximately 0.7 eV at room...
Scanning Near-Field Optical Microscopy: Characterizing Nanostructures
Dec 1, 2002 — As design rules for technologies used in applications as diverse as materials research and advanced data storage rapidly approach nanometer size, the hunt is on for simple and effective methods to characterize nanostructures. The ideal would be a...
Spectroscopy Poised to Seek Terror Agents
Dec 1, 2002 — In the post-9/11 world, an envelope may hide disease and a shoe may conceal explosives. Detecting these threats is time-consuming and labor-intensive. According to scientists at the US Army Research Laboratory at Aberdeen Proving Ground in Maryland,...
Spectroscopy Quantifies Strain and Defects in Diodes
Dec 1, 2002 — As high-power laser diodes continue to make advances in various photonic applications, it is all the more important to understand the phenomena that can lead to lower outputs and lifetimes. A team at Max Born Institut für Nichtlineare Optik und...
PerkinElmer to Market Newborn Screening System
Nov 14, 2002 — BOSTON, Nov. 14 -- PerkinElmer Inc., the leading provider of solutions to newborn screening laboratories, said it is the first company to receive FDA 510(k) clearance to market a comprehensive screening system to identify whether a newborn may...
Daily News Briefs
Nov 11, 2002 — Bruker Daltonics Inc. has been awarded the 2002 Competitive Strategy Award for the World Life Sciences Mass Spectrometry Market by Frost & Sullivan. . . . Frost & Sullivan also named Jack Cumming, CEO and president of Hologic Inc., Medical...
Infrared Sounder Producing Weather Data
Nov 6, 2002 — NASHUA, N.H., Nov. 6 -- BAE SYSTEMS' atmospheric infrared sounder (AIRS), launched May 2002 on board the Aqua earth-observing system (EOS), has completed engineering checkout and calibration operations and is now transmitting continuous,...
Imaging Gets the Drop on Radioactive Waste
Nov 1, 2002 — Radioactive waste disposal generally entails vitrifying the waste into a glassy solid. Initial processing can involve spraying the waste into an industrial flame reactor, where the intense heat evaporates benign components such as water. Given the...
Modulation Improves Terahertz Spectroscopy
Nov 1, 2002 — Time-domain terahertz spectroscopy shows promise for applications in many disciplines, but the resolution threshold of the technique has been unsuitable for the analysis of thin films. Now a team at RWTH Aachen in Germany has incorporated modulation...
Spectroscopy Could Detect Mad-Cow Disease
Oct 16, 2002 — LONDON, Oct. 16 -- German scientists are developing a new blood screening system that could detect mad cow disease or its human equivalent in less than 15 minutes, using infrared spectroscopy to look for differences in the chemical make-up between...
Chemistry Nobel Recognizes Spectrometry, NMR Advances
Oct 11, 2002 — STOCKHOLM, Sweden, Oct. 11 -- The 2002 Nobel Prize for chemistry was awarded to three scientists for their work in advanced spectrometry and nuclear magnetic resonance (NMR) to study biological macromolecules. Half of the award is being jointly...
Laser System to Map Ozone-Depleting Molecule
Oct 4, 2002 — SANTA CLARA, Calif., Oct. 4 -- A novel terahertz (THz) laser developed by Coherent and the Jet Propulsion Laboratory (JPL) will enable a NASA environmental research satellite to provide global mapping of an important ozone-depleting molecule in the...
Femtosecond Irradiation Yields Luminescent Silica
Oct 1, 2002 — A team at Harvard University in Cambridge, Mass., has reported that microstructuring silicon in air with femtosecond pulses of radiation generates a silicon-rich silica that produces visible luminescence under less than 10 mW of excitation. The...
Photonics Food Detectives
Oct 1, 2002 — Whether inspecting for E. coli O157:H7 on a slab of beef or for ethylvinylacetate in a hot dog wrapper, manufacturers in the food processing industry are turning more and more to photonics for help -- and not just for laboratory-based detective...
Spotting Bad Apples Fast
Oct 1, 2002 — Paul Martinsen and his colleagues at the Horticulture and Food Research Institute of New Zealand in Hamilton think that they have found a technique that can quickly spot bad apples. Using a time-delayed-integration spectrometer, users can measure...
Strengthening Hot Dog Wrappers
Oct 1, 2002 — Stuff assorted meat products, salt, potassium lactate, flavoring, hydrologized beef stock, sodium phosphate and sodium nitrite into a casing of ambiguous origin, and you have a preservative-laden hot dog that could probably last for years....
Tweezers Catch and Analyze Particles
Oct 1, 2002 — Researchers at East Carolina University in Greenville, N.C., have developed a combined laser tweezers and Raman spectroscopy technique that enables them to capture and measure both transparent and nontransparent particles. The system could prove...
RPI to Open Terahertz Science Lab
Sep 9, 2002 — TROY, N.Y., Sept. 9 -- A center for terahertz research will be established at Rensselaer Polytechnic Institute, thanks to a $1 million grant from the W.M. Keck Foundation of Los Angeles. RPI will use the funding to set up the W.M. Keck Laboratory...
Clock Measures Attosecond Pulses
Sep 1, 2002 — Scientists at Université de Sherbrooke in Sherbrooke, Quebec, Canada, and at the National Research Council in Ottawa are using double ionization to measure the strength and duration of the attosecond electron pulses created by intense infrared laser...
Portable Technique Could Detect Anthrax
Sep 1, 2002 — A proposed form of coherent anti-Stokes Raman spectroscopy shows promise in distinguishing anthrax spores from other organic compounds. Like conventional anti-Stokes Raman techniques, the procedure would apply two laser pulses to heighten coherence...
Spectroscopy Tracks Vibrational Energy in Liquids
Sep 1, 2002 — Using ultrafast anti-Stokes Raman spectroscopy, chemists at the University of Illinois in Urbana-Champaign have developed a spectroscopic method for tracking the flow of vibrational energy through the chemical bonds of molecules in the liquid state....
Ultrafast Measurement Leaps Forward
Sep 1, 2002 — Ultrafast lasers have applications in telecommunications, microlithography and genetic sequencing. However, their intensity and phase vs. time have always been difficult to measure. In addition, femtosecond pulses are often plagued with spatial...
Air Force Measures Refractive Index of BGG
Aug 1, 2002 — Barium gallogermanate glasses are extraordinarily strong yet still exhibit a transmission region from 0.4 to 5.0 µm, making them seemingly ideal for a vast array of large-optic applications. A team from the US Air Force Research Laboratory at...
Tactical Airborne Reconnaissance Goes Dual-Band and Beyond
Jul 1, 2002 — The military action following the events of Sept. 11 has put intelligence, surveillance and reconnaissance in the spotlight. It has highlighted the need to persistently monitor a battlefield to determine exactly who and what are there. Terrorists...
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June 2024
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