Raman Spectroscopy / Ezine
Oliiiive!
Date: Dec 1, 2009
Author: David Bradley
Nutritionally useful carotenoids and phenolic compounds increase as olives grow but then decrease as they ripen. Now, researchers have demonstrated that monitoring two Raman bands can help growers keep an eye on these changes and so optimise their product for olive oil production.
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Performing tip-enhanced Raman spectroscopy in liquids
Date: Nov 2, 2009
Author:
Tip-enhanced Raman spectroscopy has been demonstrated for the first time with both the tip and the sample completely immersed in water, with a proof-of-principle study on thiophenolate self-assembled monolayers on gold surfaces.
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Organic ferroelectrics
Date: Nov 1, 2009
Author: David Bradley
Raman spectroscopy touches on the properties of an organic ionic material, only the second of its type to be synthesised, that apparently undergoes a phase transition at low temperature making it ferroelectric.
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Depth profiling of Stratum corneum hydration in vivo: a comparison between conductance and confocal Raman spectroscopic measurements
Date: Oct 5, 2009
Author:
The high-frequency electrical conductance of tape-stripped human skin in vivo can be used to evaluate the hydration profile of Stratum corneum (SC). The conductances correlate well with their water content, as demonstrated by independent confocal Raman spectroscopic measurements.
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Imaging a semiconductor sandwich
Date: Oct 1, 2009
Author: David Bradley
A technological mash-up between graphene and the semiconductor gallium arsenide as characterised by optical microscopy and Raman spectroscopy and other techniques could pave the way to hybrid electronics devices that bridge the gap between current silicon circuitry and future molecular electronics.
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The examination of the Book of Kells using micro-Raman spectroscopy
Date: Sep 7, 2009
Author:
Four volumes of the Book of Kells were analysed by micro-Raman spectroscopy using 2 separate laser wavelengths (632.8 and 532 nm). In total, 681 sites were examined, making this the most extensive Raman spectroscopic investigation of a single medieval manuscript.
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Raman joins the dots
Date: Sep 1, 2009
Author: David Bradley
Nanoparticles can boost Raman signals sufficiently to allow the simultaneous detection of several biomarkers even deep within tissues of a living animal. The discovery could help in disease diagnostics, biomedical research, and potentially cancer treatment.
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Application of Raman spectroscopy and SERS to the analysis of synthetic dyes found in ballpoint pen inks
Date: Aug 3, 2009
Author:
The applicability of Raman spectroscopy and surface-enhanced Raman scattering to the analysis of synthetic dyes commonly found in ballpoint inks was investigated in a comparative study using ten dyes.
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Life's ancient cooker
Date: Aug 1, 2009
Author: David Bradley
Raman spectroscopy has shown that organic material may have been 'cooked' in rocky mounds known as stromatolites that have been dated to 3.45 billion years ago.
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Selectively deposited silver coatings on gold-capped silicon nanowires for SERS
Date: Jul 3, 2009
Author:
Gold caps on silicon nanowires have been selectively coated with silver by autometallography (electroless deposition) and the different morphologies achieved by changing the conditions of silver deposition were studied by SERS experiments.
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