Raman Spectroscopy / Ezine
Date rape analysis
Date: Feb 1, 2009
Author: David Bradley
Raman spectroscopy has been used to identify the date rape drug GHB and its precursor GBL in simulated spiked drinks. Importantly, the technique can be used with a wide variety of beverages in different types of containers included coloured glass, plastic beakers, and polythene bags.
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Nanomechanics of single silkworm and spider fibres: a Raman and micro-mechanical in situ study
Date: Jan 5, 2009
Author:
Micro-Raman spectroscopy and an advanced universal fibre tester were used to probe at the nanoscale the change in conformation, macromolecular fibroin chain orientation and coupling during the application of stress in single fibres three of silkworms and one spider.
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Tweezing out leukaemia spectra
Date: Jan 1, 2009
Author: David Bradley
US researchers have used laser tweezers Raman spectroscopy (LTRS) to help them characterize the effects of different chemical fixation procedures on the spectra of healthy cells and leukaemia cells and to preclude the misinterpretation of data.
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Catalytic chlorinated cleanup
Date: Dec 1, 2008
Author: David Bradley
US researchers have used surface-enhanced Raman spectroscopy (SERS) to reveal the structure and makeup of molecules sitting on the surface of palladium-covered gold nanoshell particles. The work could lead to an improved method for cleaning up the stubborn pollutant TCE (trichloroethene).
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Barcoding bacterial cells: a SERS-based methodology for pathogen identification
Date: Dec 1, 2008
Author:
A principal component analysis based on the sign of the second derivative of the surface-enhanced Raman scattering spectrum obtained on in situ grown Au-cluster-covered SiO2 substrates results in improved reproducibility and enhanced specificity for bacterial diagnostics.
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Resonance Raman monitoring of lipid oxidation in muscle foods
Date: Nov 3, 2008
Author:
Resonance Raman spectroscopy was used to follow the progression of lipid oxidation in mechanically separated turkey (MST) through oxidative bleaching of beta-carotene.
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A gold star for SERS
Date: Nov 1, 2008
Author: David Bradley
Scientists at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland, are using surface-enhanced Raman spectroscopy (SERS) to test the properties of star-shaped gold nanoparticles. They have found that these particles have optical qualities that outshine the competition and could make them useful in chemical and biological sensing and imaging.
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In vivo nonmelanoma skin cancer diagnosis using Raman microspectroscopy
Date: Oct 6, 2008
Author:
The capability of Raman microspectroscopy to provide differential diagnosis of basal cell carcinoma, squamous cell carcinoma, inflamed scar tissue, and normal tissue in vivo has been studied.
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Sooty balloons
Date: Oct 1, 2008
Author: David Bradley
Nothing more sophisticated than a lump of graphite, a roll of sticky tape, and a wafer thin sliver of silica are needed to inflate ideas about nanochemistry. Raman spectroscopy and other techniques have been used to reveal the details of the DIY construction of a balloon-like membrane of graphene.
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Hybrid SERS technology
Date: Sep 1, 2008
Author: David Bradley
Surface-Enhanced Raman Scattering (SERS) of silicon nanostructures coated with a gold-silver substrate can be used to detect DNA hybridisation for biomedical and medical diagnostics purposes, according to a new study by researchers in Singapore.
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