optical spectroscopy Articles
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Spectroscopy In Kenya
Nesvax Innovations Limited Successfully Installs Analytik Jena’s Inductively Coupled Plasma Optical Emission Spectroscopy System at Yana Oils Limited in Nairobi, Kenya. Nesvax Innovations Limited, a leading provider of laboratory and analytical solutions, is pleased to announce the successful installation of Analytik Jena’s Inductively Coupled Plasma Optical Emission Spectroscopy ...
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Single photons from single CdSe quantum dot embedded in ZnSe nanowire
We report the growth of ZnSe nanowires and nanoneedles using molecular beam epitaxy (MBE). Different growth regimes were found, depending on growth temperature and the Zn-Se flux ratio. By employing a combined MBE growth of nanowires and nanoneedles without any postprocessing of the sample, we achieved an efficient suppression of stacking fault defects. This is confirmed by transmission electron ...
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Nanoholes in metals with applications to sensors and spectroscopy
In this paper, we review our experimental and theoretical investigations of nano-holes in metal films. Our first contribution to this field was to demonstrate experimentally that the shape of the holes in arrays could be used to influence the optical properties; in particular, we showed how to control the polarisation with elliptical nano-holes. A theory explaining this shape-effect was presented ...
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Surface Decontamination of Selenium (Se) by DeconGel®
OBJECTIVE: Determine the surface decontamination efficacy of DeconGel® 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with Selenium (Se) using ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) following Environmental Protection Agency (EPA) SW-846 Methods 3005A (sampling) and 6010C (analysis). ...
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Surface Decontamination of Iodine (Potassium Iodide (KI)) by DeconGel®
OBJECTIVE: Determine the surface decontamination efficacy of DeconGel® 1101 on stainless steel, carbon steel, floor tile, and concrete surfaces contaminated with potassium iodide (KI) using ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) following Environmental Protection Agency (EPA) SW-846 Methods 3005A (sampling) and 6010C ...
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Surface Decontamination of Cyanide Compounds
OBJECTIVE: Determine the surface decontamination efficacy of DeconGel® 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with potassium ferricyanide using ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) following Environmental Protection Agency (EPA) SW-846 Methods 3005A (sampling) and 6010C (analysis). ...
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Surface Decontamination of Iron Compounds (Iron (II) Chloride (FeCl2)) by DeconGel
Determine the surface decontamination efficacy of DeconGel® 1101 on stainless steel, carbon steel, aluminum and concrete surfaces contaminated with Iron (II) Chloride (FeCl2) using ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) following Environmental Protection Agency (EPA) SW-846 Methods 3005A (sampling) and 6010C ...
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Surface Decontamination of Barium Compounds (Barium Chloride (BaCl2) and Barium Carbonate (BaCO3)) by DeconGel®
OBJECTIVE: Determine the surface decontamination efficacy of DeconGel® 1101 on stainless steel, carbon steel, and concrete surfaces contaminated with barium compounds (barium chloride (BaCl2) and barium carbonate (BaCO3)) using ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) following Environmental Protection Agency (EPA) SW-846 Methods 3005A (sampling) and 6010C ...
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Surface Decontamination of Cadmium Compounds (Cadmium Chloride (CdCl2) and Cadmium Oxide (CdO)) by DeconGel®
OBJECTIVE: Determine the surface decontamination efficacy of DeconGel® 1101 on stainless steel, aluminum, carbon steel, and concrete surfaces contaminated with cadmium compounds (cadmium chloride (CdCl2) and cadmium oxide (CdO)) using ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) following Environmental Protection Agency (EPA) SW-846 Methods 3005A (sampling) and 6010C ...
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Plasma-enhanced atomic layer deposition: Correlating O2 plasma parameters and species to blister formation and conformal film growth
Atomic layer deposition (ALD) is a coating technique that allows to coat challenging 3D substrates in a uniform and conformal way, with atomic layer thickness precision. To this aim, it leverages chemical surface reactions between two species, typically an organometallic precursor and water or a gas such as O2 or H2. Sometimes this gas is activated by means of a plasma. This creates reactive ...
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What is UV-DOAS?
What is UV-DOAS? UVDOAS (Ultraviolet Differential Optical Absorption Spectroscopy) is a monitoring technique which uses the absorbance of UV light to identify and quantify gases within a sample. Gases absorb unique wavelengths of light, creating a unique fingerprint of each compound within the absorbance spectrum; the amplitude of the absorbance wavelength is proportional to the concentration of ...
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On the possible optical resonance in carbon nanotubes based cavities
An enhanced interference phenomenon in the IR absorbance-wavenumber profiles of ship-shaped carbon nanotubes powder has been observed by attenuated total reflection at room temperature. This room temperature interference phenomenon was considered as possibly originating from an optical resonance effect and that single carbon nanotubes could act as individual Fabry-Perot or Lummer-Gehrcke resonant ...
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Erbium–doped nanoparticles in silica–based optical fibres
Developing of new rare–earth (RE)–doped optical fibres for power amplifiers and lasers requires continuous improvements in the fibre spectroscopic properties (like shape and width of the gain curve, optical quantum efficiency, resistance to spectral hole burning and photodarkening...). Silica glass as a host material for fibres has proved to be very attractive. However, some potential ...
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Nanoparticles and nanowires: synchrotron spectroscopy studies
This paper reviews the research in nanomaterials conducted in our laboratory in the last decade using conventional and synchrotron radiation techniques. While preparative and conventional characterisation techniques are described, emphasis is placed on the analysis of nanomaterials using synchrotron radiation. Materials of primary interests are metal nanoparticles and semiconductor nanowires and ...
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Establishing wear particle limits using the theory of Dynamic Equilibrium Condition (DEC) to predict when abnormal wear modes are taking place in machinery
The basis of modern oil analysis programs is the use of optical emission spectroscopy (OES) to measure the ppm (parts per million) levels of wear metals, contaminants, and additives in oil samples. Whatever an oil lab may need to measure, multi-elemental analysis is the core of an in-service oil analysis program. This paper gives an overview of Rotating Disc Electrode Optical Emission ...
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Introducing the Knowledge Center
Want to learn more about analyzing critical fluids like lubrication oil? Check out our NEW Knowledge Center. Our mission at Spectro Scientific is to enable our customers to always make confident, knowledge-based decisions about their valuable assets and machinery. Whether you are testing motor oil, hydraulic fluid, fuel or coolant, we want to give you the information you need to make these ...
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A geochemical and statistical approach for assessing heavy metal pollution in sediments from the southern Caspian coast
Abstract: The nearshore marine environment of the Caspian sea is a major repository for toxic metals originating from various sources. Since the persistent toxic metals pose serious health risks this research concentrated on investigating the concentrations and spatial distribution of metals in the nearshore sediments along the Iranian coast of the Caspian sea. Fourteen sampling sites were ...
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Optical in situ characterisation of carbon nanotube growth
In situ optical characterisation of carbon nanotube growth is reported. The nanotubes are grown on a micro–scale heater using chemical vapour deposition (CVD). Optical emission is used to characterise the temperature of the small–scale heater prior to and during growth and to monitor any temperature changes due to the interaction of the growing nanotubes with the cold gas atmosphere. In situ ...
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Measurement of ammonia emissions using various techniques in a comparative tunnel study
A field-based intercomparison study for ammonia measurements was conducted using seven analytical methods. It included sulphuric acid impinger, citric acid denuder, differential optical absorption spectroscopy (DOAS), Fourier transform infrared spectroscopy (FTIR), photoacoustic spectroscopy (PAS), and continuous aqueous extraction followed by measurement of conductivity (Airrmonia). Measurements ...
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Surface Decontamination of Iodine Compounds (Potassium Iodide (KI)) by DeconGel 1101
Abstract Surface decontamination efficacy determination of DeconGel™ 1101 on stainless steel, carbon steel, floor tile, and concrete surfaces contaminated with potassium iodide (Kl) was performed with ICP-OES (Inductively Coupled Plasma-Optical Emission Spectroscopy) according to Environmental Protection Agency (EPA) SW-846 Methods: 3005A (sampling) and 6010C (analysis). Hazardous ...
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