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Latest Raman scattering Stories

Oil And Water: Icelike When Oil Chains Are Short, Steamy When Chains Are Long
2012-12-04 20:57:19

Purdue University Water transforms into a previously unknown structure in between a liquid and a vapor when in contact with alcohol molecules containing long oily chains, according to Purdue University researchers. However, around short oily chains water is more icelike. Water plays a huge role in biological processes, from protein folding to membrane formation, and it could be that this transformation is useful in a way not yet understood, said Dor Ben-Amotz, the professor of chemistry...

Scientists Image The Molecular Structure Of Polymer Blends
2012-11-28 15:30:26

National Institute of Standards and Technology (NIST) Using an enhanced form of "chemical microscopy" developed at the National Institute of Standards and Technology (NIST), researchers there have shown that they can peer into the structure of blended polymers, resolving details of the molecular arrangement at sub-micrometer levels. The capability has important implications for the design of industrially important polymers like the polyethylene blends used to repair aging waterlines....

'BRIGHTS' Reveal Location Of Targeted Tissues
2012-11-21 10:41:38

Washington University in St. Louis Called BRIGHTs, the tiny probes described in the online issue of Advanced Materials on Nov. 15, bind to biomarkers of disease and, when swept by an infrared laser, light up to reveal their location. Tiny as they are, the probes are exquisitely engineered objects: gold nanoparticles covered with molecules called Raman reporters, in turn covered by a thin shell of gold that spontaneously forms a dodecahedron. The Raman reporters are molecules whose...

Finding Explosives With Laser Beams
2012-02-28 04:12:23

Scientists at Vienna University of Technology have found a way to detect chemicals over long distances, even if they are enclosed in containers People like to keep a safe distance from explosive substances, but in order to analyze them, close contact is usually inevitable. At the Vienna University of Technology, a new method has now been developed to detect chemicals inside a container over a distance of more than a hundred meters. Laser light is scattered in a very specific way by...

Daily Pinpricks Could Be Replaced By Spectroscopy
2011-10-25 09:08:11

Part of managing diabetes involves piercing a finger several times daily to monitor blood sugar levels. Raman spectroscopy could let diabetics monitor glucose without those daily pinpricks. In the past, this would have required a tabletop's worth of equipment. Two former graduate students at MIT's George R. Harrison Spectroscopy Laboratory, Chae-Ryon Kong and Ishan Barman, detail in the AIP's journal AIP Advances how to potentially reduce the overall size of this sensor by making an important...

2011-03-21 16:59:32

Princeton researchers have invented an extremely sensitive sensor that opens up new ways to detect a wide range of substances, from tell-tale signs of cancer to hidden explosives. The sensor, which is the most sensitive of its kind to date, relies on a completely new architecture and fabrication technique developed by the Princeton researchers. The device boosts faint signals generated by the scattering of laser light from a material placed on it, allowing the identification of various...

2011-03-17 00:02:04

Scientists at the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California at Berkeley have learned to control the quantum pathways determining how light scatters in graphene. Controlled scattering provides a new tool for the study of this unique material "“ graphene is a single sheet of carbon just one atom thick "“ and may point to practical applications for controlling light and electronic states in graphene nanodevices....

2011-02-28 09:06:00

GLASGOW, Scotland, February 28, 2011 /PRNewswire/ -- Renishaw Diagnostics Ltd, a world leading provider of trace level detection technologies based on the exploitation of surface enhanced Raman scattering (SERS) and surface enhanced resonance Raman scattering (SERRS), for research and molecular diagnostics applications, today announced the launch of its first research use only (RUO) multiplex assay system which allows precious research samples to be 'screened' for 10 or more 'targets',...

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2011-02-10 12:08:18

In asymmetric warfare, early detection and identification of trace level chemical and biological agents and explosive compounds is critical to rapid reaction, response, and survivability. While there are many methods currently being used that can detect these threats, none allow for the unique fingerprinting of threat agents at trace levels. A research team, led by Drs. Joshua Caldwell and Orest Glembocki, scientists at the U.S. Naval Research Laboratory, Electronic Science and Technology...


Word of the Day
negawatt
  • A unit of saved energy.
Coined by Amory Lovins, chairman of the Rocky Mountain Institute as a contraction of negative watt on the model of similar compounds like megawatt.