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Laser and chips: Raman is a diamond

Date: Nov 1, 2015

Author: David Bradley

US researchers have used diamond to develop a new class of Raman laser sufficiently compact to fit on a photonic chip. The device uses a nanoscopic diamond resonator shaped like a racetrack to convert one frequency of laser light to an entirely different range of wavelengths, opening up new options for broadband data communications and many other applications.

Read More thumbnail image: Laser and chips Raman is a diamond

Journal Highlight: Insights into the kinetics of methane hydrate formation in a stirred tank reactor by in situ Raman spectroscopy

Date: Oct 15, 2015

Author: spectroscopyNOW

The kinetics of methane hydrate formation in a stirred tank were followed by the simultaneous application of macroscopic and microscopic measurements, aided by in situ Raman spectroscopy.

Read More thumbnail image: Journal Highlight Insights into the kinetics of methane hydrate formation in a stirred tank reactor by insitu Raman spectroscopy

Martian chronicled: By Raman

Date: Oct 1, 2015

Author: David Bradley

Seven samples of Icelandic tephra minerals were analysed using X-ray diffraction (XRD), Raman spectroscopy and Fourier transform infrared (FTIR) as a proxy for Martian rocks to show how a comprehensive library of spectra might be built  up ahead of a fact-finding mission to the Red Planet.

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Journal Highlight: Demonstration of a signal enhanced fast Raman sensor for multi-species gas analyses at a low pressure range for anesthesia monitoring

Date: Sep 6, 2015

Author: spectroscopyNOW

A fully functional gas-phase Raman system with a multipass cavity has been designed for measurements in the low-pressure regime, especially for anesthesia monitoring.

Read More thumbnail image: Journal Highlight Demonstration of a signal enhanced fast Raman sensor for multi-species gas analyses at a low pressure range for anesthesia monitoring

Urinary tract infections: Lab-on-a-disc detection

Date: Sep 1, 2015

Author: David Bradley

A lab-on-a-disc platform that combines microfluidics technology and Raman microscopy could be used for the earlier detection of urinary tract infection, according to a new study.

Read More thumbnail image: Urinary tract infections Lab-on-a-disc detection

Journal Highlight: Real-time in vivo cancer diagnosis using Raman spectroscopy

Date: Aug 3, 2015

Author: spectroscopyNOW

An overview is presented on the latest development of real-time in vivo Raman systems for cancer detection, covering instrumentation, data handling, oncology applications and the diagnosis of different kinds of cancer.

Read More thumbnail image: Journal Highlight Real-time in vivo cancer diagnosis using Raman spectroscopy

Stimulated Raman scattering: Glucose tracking

Date: Aug 1, 2015

Author: David Bradley

Stimulated Raman scattering (SRS) imaging can be used to follow glucose uptake activity in living cells by using a derivative of the sugar molecule tagged with an alkynyl group. The technique has been demonstrated on live mouse brain hippocampal neurones and tumour tissues.

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Journal Highlight: Rapid detection of melamine in milk using immunological separation and surface enhanced Raman spectroscopy

Date: Jul 3, 2015

Author: spectroscopyNOW

Immunological separation and surface-enhanced Raman spectroscopy have been integrated to provide a high-throughput procedure for detecting melamine in milk.

Read More thumbnail image: Journal Highlight Rapid detection of melamine in milk using immunological separation and surface enhanced Raman spectroscopy

Raman skeleton key: Universal SERS substrate

Date: Jul 1, 2015

Author: David Bradley

Commonly used substrates for surface-enhanced Raman spectroscopy (SERS) function only at specific excitation wavelengths; which means different substrates for different tasks. consumes more biological/chemical materials, substrates, and measurement time. An ultrabroadband super-absorbing metasurface has been developed by researchers in China and the US. The system works as a universal SERS substrate for low cost and high performance sensing with much lower consumption of SERS substrates as well as cutting...

Read More thumbnail image: Raman skeleton key Universal SERS substrate

Journal Highlight: Dielectrophoretic positioning of single nanoparticles on atomic force microscope tips for tip-enhanced Raman spectroscopy

Date: Jun 8, 2015

Author: spectroscopyNOW

The successful positioning of an individual plasmonic nanoparticle on a commercial atomic force microscope tip by dielectrophoresis for tip-enhanced Raman spectroscopy has been demonstrated.

Read More thumbnail image: Journal Highlight Dielectrophoretic positioning of single nanoparticles on atomic force microscope tips for tip-enhanced Raman spectroscopy
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