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Microscopy News
Fighting Counterfeiting with the Basics
Mar 1, 2008 — The best way to spot a fake is to check its true colors. Identifying counterfeit commercial goods may be easier in the future, thanks to Effendi Widjaja and Marc V. Garland of the Singapore-based Institute of Chemical and Engineering Sciences, who have shown that band-target entropy minimization analysis of Raman microscopy spectral data reveals the constituents of an object — in their case, a postage stamp. An analytical method helps discern the real from the fake via spectral...
Food and Water Safety
Mar 1, 2008 — Molecular sensors can detect trace amounts of molecules present in food and water that signal the presence of danger to humans. The target may be the toxic molecule itself, as in the case of pesticide residues and pollutants, or it may be a...
Getting Semiconductors Ready to Take a Spin
Mar 1, 2008 — For semiconductors, the hope is that everything will not be just about electron charge in the future. Instead, having devices also exploit electron spin — resulting in new kinds of memory and logic chips — is a goal of spintronics, the spin-based...
Lensless Soft X-Ray Microscopy System Achieves 70-nm Resolution
Mar 1, 2008 — Although x-ray crystallography can reveal the structure of molecules, numerous molecules cannot be crystallized and are not found naturally in crystallized form. A relatively new technique called x-ray diffraction microscopy is compatible with...
Nanobeads Prove Useful for Making Optical Molecular Sensors
Mar 1, 2008 — Optical chemical sensors are employed for testing in numerous fields, from marine research to the aerospace and automotive industries to medicine and biotechnology. Such sensors often consist of indicator fluorophores in a polymeric...
OPTICS RESOURCE
Mar 1, 2008 — Edmund Optics has released its “Optics and Optical Instruments Catalog, Spring 2008,” which features the new TechSpech BeamX laser beam expanders and UV fused silica aspheres. The 404-page publication includes expanded sections on optics, fiber...
Photocurrent Altered with Nanoparticles
Mar 1, 2008 — 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,...
Program that Images Stars Also Works in Nanoworld
Mar 1, 2008 — If it works in the macroworld, why not in the nanoworld? Researchers at Georgia Institute of Technology, at Emory University and at Georgia State University, all in Atlanta, were looking for a way to differentiate one nanosize probe from another...
Saving Money with Laser Processing
Mar 1, 2008 — Flat panel displays are one of the great modern engineering success stories. They are everywhere — in mobile phones, public displays and even sports arenas. In fact, even now there is a fair chance that you use them every day at home, at work or...
Slicing and Dicing Food and Agricultural Data
Mar 1, 2008 — Farming has gone high-tech, with optical monitoring taking place from the air and from satellites, on planting and harvesting equipment, and on ground-based sensors. The food and beverage industry uses optical sensing to ensure that raw materials,...
Optical Tweezer Microfabbed
CAMBRIDGE, Mass., Feb. 25, 2008 -- A new type of optical tweezer consisting of a Fresnel zone plate microfabricated on a glass slide can trap particles without using high-performance objective lenses. It has the potential to make biological and microfluidic force measurements inside...
Atom-Moving Force Measured
SAN JOSE, Calif., Feb. 22, 2008 -- The force it takes to move individual atoms on a surface has been measured for the first time, an achievement that could mean future nanoelectronic devices for information technology, medicine and data storage will contain integrated circuits...
Lensless Camera Uses X-rays
ARGONNE, Ill., Feb. 21, 2008 -- A lensless camera uses x-rays to take high-resolution images of ultrasmall structures buried inside nanoparticles, nanomaterials, and biological specimens. Scientists at Argonne National Laboratory, in collaboration with those from the...
Maiman Tribute Set at CLEO
WASHINGTON, D.C., Feb. 7, 2008 -- A symposium in honor of Theodore Maiman (see also: Laser Inventor Dies at 79), inventor of the first operable laser and twice nominated for a Nobel Prize, will be among topics at CLEO/QELS, to be held May 4-9 at the San Jose McEnery Convention...
Maiman Tribute Set at CLEO
WASHINGTON, Feb. 6, 2008 -- A symposium in honor of the late Theodore Maiman, inventor of the first operable laser and twice nominated for a Nobel Prize, will be among topics at CLEO/QELS, to be held May 4-9 at the San Jose McEnery Convention Center in San Jose, Calif. (See...
FCS Helps to Track Individual Molecules
During Polystyrene Formation
Feb 1, 2008 — Polymers are very important, whether they are artificial (plastics) or natural (proteins). Various techniques have been used to explore the processes involved in the formation of polymers from simpler molecules. Nuclear magnetic resonance, electron...
For Fish, Looking Beautiful Takes Time
Feb 1, 2008 — In a guanine crystal growing contest, humans might be most prolific, but the Japanese koi fish (Cyprinus carpio) would take the prize for highest reflectivity. This species has been growing a supershiny version of the guanine photonic crystal...
Gaining High Resolution with Nanoaperture Grid
Feb 1, 2008 — Researchers at California Institute of Technology in Pasadena have demonstrated a subwavelength-resolution microscopy technique that uses a two-dimensional grid of tiny holes to increase resolution in a manner similar to that of a near-field...
MICROSTRUCTURES
Feb 1, 2008 — A catalog titled “Standard-Microstructures” from POG Präzisionsoptik Gera GmbH presents a variety of new products, including crosshair eyepiece graticules and eyepiece micrometer scales that are available in more standard diameters to fit a broader...
On-Machine Testing of Optical Quality
Feb 1, 2008 — Interferometers often are seen as laboratory instruments, requiring rooms with controlled environments, skilled operators and adequate space. Apart from the fact that this is not necessarily true of all devices on the market, integration of...
Rudolph Technologies to Buy Semiconductor Division
Feb 1, 2008 — Applied Precision LLC of Issaquah, Wash., has announced the sale of its semiconductor division to Rudolph Technologies Inc. of Flanders, N.J., a designer and manufacturer of process characterization equipment and software for thin-film measurement...
SPECTROSCOPY
Feb 1, 2008 — The book Modern Optical Spectroscopy: With Examples from Biophysics and Biochemistry explains the theory of optical spectroscopic phenomena and demonstrates how the ideas are used in molecular and cellular biophysics and biochemistry. Explanations...
Tiny Mach-Zehnder Modulator Operates at 10 Gb/s
Feb 1, 2008 — Silicon photonics offers the potential of combining the speed and compactness of photonics with the functionality and CMOS fabrication of electronics, a happy combination that may result in vastly more capable computers, communications and consumer...
Ultrafast Electron Microscopy Reveals Laser Control of Nanochannels
Feb 1, 2008 — Scientists are interested in optoelectronics applications, such as optical memory storage, and in molecular machines that mimic biological molecules, which usually exhibit precision superior to that of man-made devices. These diverse fields may...
With a Pulse of Light, Focused Ultrasound Spots Small Cracks
Feb 1, 2008 — What you can’t see can hurt you — at least indirectly. Surface defects and cracks are among the causes of material failures in cars, aircraft and buildings, and they sometimes have a hand in the demise of biomedical and microelectronic devices. The...
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July 2024
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