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Water, water everywhere: Ringwoodite revelation

Date: Apr 1, 2014

Author: David Bradley

Raman and IR spectroscopy, X-ray diffraction and other techniques have been used to examine a rare mineral sample of hydrous ringwoodite trapped within a $20 rough diamond for years. Critical water measurements of the sample at the Arctic Resources Geochemistry Laboratory are set to reveal the presence of water based on isotopic microanalysis, suggesting that there may be vast oceans between 410 and 660 kilometres below the Earth's surface.

Read More thumbnail image: Water water everywhere Ringwoodite revelation

Journal Highlight: Decomposition of in vivo spatially offset Raman spectroscopy data using multivariate analysis techniques

Date: Mar 17, 2014

Author: spectroscopyNOW

Spatially offset Raman spectroscopy data were processed with three different multivariate techniques and compared for their performance with a spectrally challenging plastic model system and the analysis of human bone transcutaneously in vivo.

Read More thumbnail image: Journal Highlight Decomposition of in vivo spatially offset Raman spectroscopy data using multivariate analysis techniques

Journal Highlight: Outdoor use of mobile Raman spectrometers to study the solutions and ices of amino acids

Date: Mar 3, 2014

Author: spectroscopyNOW

Glycine, alanine and threonine were analysed in the form of water solutions, their mixtures in solution, as well as their respective ices using two hand-held Raman instruments under outdoor and winter mountain conditions.

Read More thumbnail image: Journal Highlight Outdoor use of mobile Raman spectrometers to study the solutions and ices of amino acids

Sanguine rheology: Blood that's not so thick

Date: Mar 1, 2014

Author: David Bradley

The failure of blood to clot, or coagulate, following serious bodily trauma or a surgical procedure is one of the leading causes of preventable death in patients. Now, a new optical device based on laser speckle rheology requires only a drop or two of blood and a few minutes to measure the key coagulation parameters that can guide medical decisions about how to proceed in the emergency room or operating theatre.

Read More thumbnail image: Sanguine rheology Blood thats not so thick

Fuel fraud: Succumbs to SERS system

Date: Feb 3, 2014

Author:

The details of a patented, stable silver nano-colloid material for use in surface-enhanced Raman spectroscopy (SERS) have been reported by researchers from the University of Lincoln, UK. The system has already demonstrated its utility in portable instrumentation for the identification of fuel fraud.

Read More thumbnail image: Fuel fraud Succumbs to SERS system

Journal Highlight: A Raman spectroscopy bio-sensor for tissue discrimination in surgical robotics

Date: Feb 3, 2014

Author: spectroscopyNOW

A generic fiber-based Raman sensor to be used in tumour margin identification during endoluminal robotic surgery has been described.

Read More thumbnail image: Journal Highlight A Raman spectroscopy bio-sensor for tissue discrimination in surgical robotics

Journal Highlight: Structural properties of mirrored carbon spirals as revealed by SEM and micro-Raman spectroscopy

Date: Jan 6, 2014

Author: spectroscopyNOW

A novel type of iron–carbon composite nano-structure in which graphitic arms encapsulate the iron core entirely has been characterised by SEM and micro-Raman spectroscopy.

Read More thumbnail image: Journal Highlight Structural properties of mirrored carbon spirals as revealed by SEM and micro-Raman spectroscopy

Remote mismatch: Sensing opportunities

Date: Jan 1, 2014

Author: David Bradley

Bi-directional coherent Raman scattering for remote sensing applications might now be possible thanks to US work into a unique optical metamaterial with a refractive index of zero that generates "phase mismatch-free non-linear light," wherein the light waves move through the material gaining strength in all directions.

Read More thumbnail image: Remote mismatch Sensing opportunities

Journal Highlight: Raman spectroscopy as a non-invasive technique for the quantification of melanins in feathers and hairs

Date: Dec 2, 2013

Author: spectroscopyNOW

Confocal Raman spectroscopy was used to quantify pheomelanin and eumelanin in feathers of red-legged partridges and hairs of wild boars and humans.

Read More thumbnail image: Journal Highlight Raman spectroscopy as a non-invasive technique for the quantification of melanins in feathers and hairs

Enhancing silver: Hybrids for SERS

Date: Dec 1, 2013

Author: David Bradley

A relatively straightforward method for making core-shell silver-molecularly imprinted polymer (Ag@MIP) hybrids has been developed and initial experiments show it has great potential for use in surface-enhanced Raman spectroscopy (SERS) for ultrasensitive analytical applications.

Read More thumbnail image: Enhancing silver Hybrids for SERS
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