Raman Spectroscopy / Ezine
Cleaning CARS: Cutting down on spectral noise pollution
Date: Jan 5, 2012
Author: David Bradley
Researchers at the University of Twente's MESA+ Institute for Nanotechnology and elsewhere have used a "reverse" approach to cleaning CARS, coherent anti-Stokes Raman spectroscopy, images that helps them eliminate background noise.
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Journal Highlight: Analysis of confiscated fireworks using Raman spectroscopy assisted with SEM-EDS and FTIR
Date: Dec 5, 2011
Author:
A forensic analysis of several samples of pyrotechnic artefacts by Raman spectroscopy assisted by SEM-EDS and FTIR spectroscopy revealed many components including several nitrates, ammonium perchlorate, nitrocellulose, metallic titanium particles and shellac.
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Lab on a bubble: SERS on spheres
Date: Dec 1, 2011
Author: David Bradley
A new class of materials for surface-enhanced Raman spectroscopy (SERS) consisting of hollow, buoyant silica microspheres coated with gold nanoparticles has been developed. These new materials allow for a novel type of molecular assay designated as a lab-on-a-bubble (LoB).
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Forensic science: CSI Raman
Date: Nov 1, 2011
Author: David Bradley
Raman spectroscopy and an advanced statistical analysis have now been added to the arsenal of techniques available to law enforcement scientists allowing them to quickly and accurately identify traces of vaginal fluid at a crime scene.
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Journal Highlight: Characterization of oil-producing microalgae using Raman spectroscopy
Date: Oct 31, 2011
Author:
The current status of Raman spectroscopy applications on algae is reviewed, with particular attention to identifying and selecting oil-rich algal strains for the potential mass production of commercial biofuels and for utilization in the food industry.
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Journal Highlight: Investigation concerning the applicability of Raman spectroscopy for prospective inline monitoring of electrode processing for lithium ion batteries
Date: Oct 3, 2011
Author:
A portable and cost-effective Raman spectrometer was tested for the inline monitoring of electrode processing using tape-cast LCO foils as examples.
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Serendipitous tuning: Well-stacked graphene
Date: Oct 1, 2011
Author: David Bradley
An accidental discovery at the University of California, Riverside, might allow materials scientists to control the way sheets of the carbon allotrope stack together and so allow them to tune the electrical properties of the material. Raman spectroscopy was used to reveal the stacking order and so may have played a crucial role in the development of graphene nanoelectronics devices of the future.
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Journal Highlight: Raman spectroscopy of the polymorphic forms and liquid state of cocoa butter
Date: Sep 6, 2011
Author:
Raman spectroscopy was used to characterize the polymorphs and liquid state of cocoa butter, clearly demonstrating that the different functional groups studied could be characterized independently, allowing for the understanding of their role in cocoa butter polymorphism.
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Rocky road to confusion: Raman tricks geochemists
Date: Sep 1, 2011
Author: David Bradley
Raman spectroscopy has become an increasingly useful tool in the geosciences partly because it is non-destructive and requires minimal sample preparation, but also because it can be carried out on site with various irreplaceable geological samples. Unfortunately, Raman can confuse, especially when substances such as haematite and disordered carbonaceous materials are present in the same sample.
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Journal Highlight: Tunable optical setup with high flexibility for spectrally resolved coherent anti-Stokes Raman scattering microscopy
Date: Aug 8, 2011
Author:
A simplified setup for coherent anti-Stokes Raman scattering microscopy allows for recording images with 30 cm-1 excitation band-width for probing Raman bands between 500 and 900 cm-1 with minimal requirements for alignment.
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