Raman Spectroscopy / Ezine
TNT, meet graphene: Explosive sensor
Date: May 1, 2013
Author: David Bradley
Another chemical pie in which graphene has its lacy carbon fingers is in the form of a sensitive and selective detection system for the common explosive trinitrotoluene (TNT). Silver nanoparticles functionalised with p-aminothiophenol (PATP) and supported on graphene sheets allow the straightforward surface-ehanced Raman spectroscopic SERS) detection of the explosive.
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Journal Highlight: Graphene: A platform for surface-enhanced Raman spectroscopy
Date: Apr 29, 2013
Author: spectroscopyNOW
The multi-role of graphene played in SERS is overviewed, including as a Raman probe, a substrate, an additive, and a building block for a flat surface for SERS.
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Journal Highlight: Trace level detection and identification of nitro-based explosives by surface-enhanced Raman spectroscopy
Date: Apr 1, 2013
Author: spectroscopyNOW
Surface-enhanced Raman spectroscopy has been used to detect and identify traces of pentaerythritol tetranitrate (PETN), ethylene glycol dinitrate (EGDN), cyclotrimethylene-trinitramine (RDX) and trinitrotoluene (TNT) using commercially available substrates.
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Unearthing water's deep structure: Raman revelations
Date: Apr 1, 2013
Author:
Raman X-ray scattering has been used by a German-Finnish-French collaboration to investigate the behaviour of water subjected to the kinds of high pressures and temperatures it experiences deep within the Earth.
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Journal Highlight: Quantification of active ingredients in suppositories by FT-Raman spectroscopy
Date: Mar 4, 2013
Author: spectroscopyNOW
An efficient method for the quantitative determination of acetaminophen and diclofenac sodium in commercial suppositories based on partial least squares treatment of FT-Raman spectra is described.
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Ringing the changes: Environmental endocrine detection
Date: Mar 1, 2013
Author: David Bradley
Cyclodextrin, the natural starch ring molecule, can be used to create a sensitive coating on gold for surface enhanced Raman spectroscopic (SERS) detection of endocrine disrupters present in environmental water samples, according to a new study.
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Journal Highlight: Imaging of internal stress around a mineral inclusion in a sapphire crystal: application of micro-Raman and photoluminescence spectroscopy
Date: Feb 4, 2013
Author: spectroscopyNOW
A micro-Raman and photoluminescence imaging technique was developed for visualizing the internal stress fields in a sapphire crystal and applied to an Australian sapphire gemstone with a zircon inclusion.
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Viral detection: SERS sensitivity
Date: Feb 1, 2013
Author: David Bradley
The surface envelope and antigens from the zoonotic pathogens West Nile virus (WNV) and Rift Valley fever virus (RVFV) can now be detected with high sensitivity thanks to the development of an immunoassay based on surface-enhanced Raman scattering (SERS) spectroscopy.
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Journal Highlight: Polymorphic transformation of anhydrous caffeine upon grinding and hydrostatic pressurizing analyzed by low-frequency Raman spectroscopy
Date: Jan 7, 2013
Author: spectroscopyNOW
Low-frequency Raman investigations were carried out upon pressurizing and grinding both crystalline forms of anhydrous caffeine at room temperature, leading to the detection of metastable states under stress.
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Deposit detection: Spectroscopy against breast cancer
Date: Jan 7, 2013
Author: David Bradley
Minute deposits of calcium in breast tissue act as a marker for breast cancer. Diffuse reflectance spectroscopy has now been used to show how deposits in benign conditions can be distinguished from those present in the early stages of the disease.
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