Raman Spectroscopy / Ezine
Rock and awe: Raman discredits microbial fossils
Date: Mar 1, 2011
Author: David Bradley
The oldest fossils of bacteria ever found were discovered in a rock formation in Western Australia, the discovery led to great excitement that has not abated for two decades. Until now. Raman spectroscopy now shows that what palaeontologists thought were pristine microbial fossils may not be anything more complex than chunks of ancient Australian rock.
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Golden pop: nanoparticles for SERS
Date: Feb 1, 2011
Author: David Bradley
Gold nanoparticles that resemble tiny popcorn kernels can be produced using a simple two-step process. Researchers at Jackson State University in the US have used these particles in SERS experiments to detect malignant prostate cancer at just the 50-cell level. The same particles can also be activated to kill the cells.
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Journal Highlight: Femtosecond stimulated Raman spectroscopy
Date: Jan 31, 2011
Author:
Advances in the field of femtosecond stimulated Raman spectroscopy, a new time-resolved structural technique that provides complete vibrational spectra on the ultrafast timescale, are reviewed.
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Fast-track walking pneumonia test: SERS speeds up diagnosis
Date: Jan 5, 2011
Author: David Bradley
A new approach to testing for a common form of pneumonia using nanoparticles to boost SERS signals can cut the time to diagnosis from several days to a mere ten minutes, according to research published in the journal Plos One.
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Journal Highlight: Understanding tissue specific compositions of bioenergy feedstocks through hyperspectral Raman imaging
Date: Jan 3, 2011
Author:
Hyperspectral Raman imaging was used to study the tissue/cell type specific distribution of lignin and cellulose polymers within the plant cell walls of two potential bioenergy feedstocks: corn stover and Eucalyptus globulus.
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Sensitising Raman: Forensic and diagnostic boost
Date: Dec 1, 2010
Author: David Bradley
The efforts of forensic investigators are often stymied by the diverse and complex nature of sample mixtures they must analyse but low analyte concentration is probably the most problematic issue they must address. Now, a US team has found a way to improve Raman spectroscopy for low-concentration analysis. Their approach could also improve medical diagnosis, drug/chemical development, and in national security.
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Journal Highlight: Verdigris pigment: a mixture of compounds. Input from Raman spectroscopy
Date: Nov 29, 2010
Author:
The reproduction of an old recipe to obtain the pigment known as verdigris leads to a complex mixture of hydrated copper(II) acetates, which was characterised by Raman spectroscopy, Fourier transform infrared spectroscopy and X-ray diffraction.
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Olive oil biophenols: Raman reveals all
Date: Nov 1, 2010
Author: David Bradley
The first report of Raman spectroscopy being used to look at chemical structures in olive oil has been published. The study establishes Raman as a rapid, non-destructive and reliable analytical technique for identifying bioactive components, such as biophenols in dietary extracts and surpasses other analytical methods.
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Sexithiophene encapsulated in a single-walled carbon nanotube: An in situ Raman spectroelectrochemical study of a peapod structure
Date: Nov 1, 2010
Author:
The interaction of single-walled carbon nanotubes (SWCNTs) and alpha-sexithiophene (6T) was studied by Raman spectroscopy and by in situ Raman spectroelectrochemistry..
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In situ detection of cocaine hydrochloride in clothing impregnated with the drug using benchtop and portable Raman spectroscopy
Date: Oct 4, 2010
Author:
One benchtop dispersive Raman spectrometer coupled to a fibre-optic probe and two portable Raman spectrometers were used for the in situ detection of cocaine hydrochloride in clothing impregnated with the drug, acquiring high-quality spectra within seconds.
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