scholarly journals Remote sensing of chemical agents within nuclear facilities using Raman spectroscopy

2020 ◽  
Vol 51 (12) ◽  
pp. 2543-2551
Author(s):  
Michael Foster ◽  
Michael Wharton ◽  
William Brooks ◽  
Matthew Goundry ◽  
Charles Warren ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Raman Spectroscopy ◽  
Nuclear Facilities ◽  
Chemical Agents

Mid-infrared all solid state DIAL for remote sensing of hazardous chemical agents

2006 ◽  
Author(s):  
V. Vaicikauskas ◽  
Z. Kuprionis ◽  
M. Kaucikas ◽  
V. Svedas ◽  
V. Kabelka
Keyword(s):  
Remote Sensing ◽  
Solid State ◽  
Mid Infrared ◽  
Hazardous Chemical ◽  
Chemical Agents

Matrix-Isolated Surface-Enhanced Raman Spectroscopy (SERS): The Role of the Supporting Matrix

1989 ◽  
Vol 43 (7) ◽  
pp. 1180-1187 ◽  
Author(s):  
Steven A. Soper ◽  
Theodore Kuwana
Keyword(s):  
Remote Sensing ◽  
Raman Spectroscopy ◽  
Detection Limit ◽  
Surface Enhanced Raman Spectroscopy ◽  
Solution Phase ◽  
Raman Spectrometer ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Tlc Plates

The influence of a supporting matrix in surface-enhanced Raman spectroscopy (SERS) has been investigated. The support matrices were conventional TLC plates onto which Ag colloidal hydrosols mixed with the dye pararosaniline had been deposited. The protocol of preparation of the Ag sol as well as the type of TLC plate had a profound effect upon the intensity of the SERS signals of pararosaniline. The Ag sol and the TLC plate that resulted in the maximum SERS intensities yielded a detection limit of ∼ 108 femtomols (33 pg) of dye deposited onto the TLC plate. Deposition of the dye/sol mixture onto the supporting matrix also resulted in stable SERS signals for extended periods of time, in contrast to the solution-phase case, where the signal is only transient in nature. In order to obtain the SERS spectra, a remote sensing Raman spectrometer was constructed and is described.

Surface-Enhanced Raman Spectra of VX and its Hydrolysis Products

2005 ◽  
Vol 59 (5) ◽  
pp. 654-660 ◽  
Author(s):  
Stuart Farquharson ◽  
Alan Gift ◽  
Paul Maksymiuk ◽  
Frank Inscore
Keyword(s):  
Raman Spectroscopy ◽  
Vibrational Mode ◽  
Sol Gel ◽  
Surface Enhanced Raman Spectroscopy ◽  
Nerve Agent ◽  
Methylphosphonic Acid ◽  
Hydrolysis Products ◽  
Chemical Agents ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

Detection of chemical agents as poisons in water supplies not only requires μg/L sensitivity, but also requires the ability to distinguish their hydrolysis products. We have been investigating the ability of surface-enhanced Raman spectroscopy (SERS) to detect chemical agents at these concentrations. Here we expand these studies and present the SERS spectra of the nerve agent VX (ethyl S-2-diisopropylamino ethyl methylphosphonothioate) and its hydrolysis products, ethyl S-2-diisopropylamino methylphosphonothioate, 2-(diisopropylamino) ethanethiol, ethyl methylphosphonic acid, and methylphosphonic acid. Vibrational mode assignments for the observed SERS peaks are also provided. Overall, each of these chemicals produces a series of peaks between 450 and 900 cm−1 that are sufficiently unique to allow identification. SERS measurements were performed in silver-doped sol-gel-filled capillaries that are being developed as part of an extractive point sensor.

scholarly journals Raman Spectroscopy from Laboratory and Proximal to Remote Sensing: A Tool for the Volcanological Sciences

2020 ◽  
Vol 12 (5) ◽  
pp. 805 ◽  
Author(s):  
Daniele Giordano ◽  
James K. Russell ◽  
Diego González-García ◽  
Danilo Bersani ◽  
Donald B. Dingwell ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Raman Spectroscopy ◽  
Spectral Analysis ◽  
Volcano Monitoring ◽  
Silicate Glasses ◽  
Natural Materials ◽  
In Situ Studies ◽  
Raman Spectral ◽  
Raman Spectral Analysis

Here we explore and review some of the latest ideas and applications of Raman spectroscopy to the volcanological sciences. Firstly, we provide a brief overview of how Raman spectral analysis works and how spectra from silicate glasses are interpreted. We then look at specific applications of Raman spectral analysis to the volcanological sciences based on measurements on and studies of natural materials in the laboratory. We conclude by examining the potential for Raman spectral analysis to be used as a field based aid to volcano monitoring via in situ studies of proximal deposits and; perhaps; in remote sensing campaigns

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