Dxr dispersive raman spectrometer

Manufactured by Thermo Fisher Scientific

Sourced in United States

The DXR Dispersive Raman spectrometer is a laboratory instrument designed for Raman spectroscopy analysis. It utilizes a dispersive optical system to measure the inelastic scattering of monochromatic light, providing information about the molecular structure and composition of samples.

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Lab products found in correlation

Omnic 9, by Thermo Fisher Scientific (2 mentions) Avatar 330 ftir spectrometer, by Thermo Fisher Scientific (1 mentions)

Close spelling variants of this product

DXR Dispersive Raman DXR Raman spectrometer DXR spectrometer Raman spectrometer

4 protocols using dxr dispersive raman spectrometer

Characterizing TNT-Carboxylic Acid Interactions

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The determination of the success of functionalization procedure and the nature of TNT–carboxylic acid interactions were evaluated using an Avatar 330 FT-IR spectrometer (Thermo Fisher Scientific Ltd., Waltham, MA, USA). FT-IR measurements were conducted with a transmission E.S.P. accessory by using 128 scans at a resolution of 4 cm⁻¹ and applying H₂O and CO₂ corrections. Spectragryph 1.2.16.1 software (Friedrich Menges, Obersdorf, Germany) was used to evaluate the results.
A DXR Dispersive Raman spectrometer (Thermo Fisher Scientific Inc., Waltham, MA, USA) equipped with a CCD camera and a diode laser operating at a wavelength of 780 nm was applied to perform Raman measurements, which were carried out with a laser power of 12 and 24 mW at 25 μm slit aperture size. The data were collected in the spectral range of 200–3300 cm⁻¹ using photobleaching to compensate fluorescence of titanate. OMNIC 8 software was used for data collection, averaging the total of 20 scans and making the spectral corrections. For the removal of cosmic rays, a convolution filter was applied on the original spectrum using Gaussian kernel.

Saker R., Jójárt-Laczkovich O., Regdon G J.r., Takács T., Szenti I., Bózsity-Faragó N., Zupkó I, & Sovány T. (2023). Surface Modification of Titanate Nanotubes with a Carboxylic Arm for Further Functionalization Intended to Pharmaceutical Applications. Pharmaceutics, 15(12), 2780.

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Raman Study of Vandenbrandeite Crystal

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The Raman spectrum of vandenbrandeite was collected from the natural crystal sample from Musonoi Mine (DRC). The Raman spectra were obtained in the range from 4000 to 40 cm⁻¹ using a DXR dispersive Raman Spectrometer (Thermo Scientific) mounted on a confocal Olympus microscope. The Raman signal was excited by an unpolarized red 633 nm He–Ne gas laser and detected by a CCD detector. The experimental parameters were: 100× objective, 10 s exposure time, 300 exposures, 50 μm slit spectrograph aperture and 6 mW laser power level. The spectra were repeatedly acquired from different grains in order to obtain a representative spectrum with the best signal-to-noise ratio. The eventual thermal damage of the measured point was excluded by visual inspection of excited surface after measurement, by observation of possible decay of spectral features in the start of excitation and checking for thermal downshift of Raman lines. The instrument was set up by a software-controlled calibration procedure using multiple neon emission lines (wavelength calibration), multiple polystyrene Raman bands (laser frequency calibration) and standardized white-light sources (intensity calibration). Spectral manipulations were performed using the Omnic 9 software (Thermo Scientific).

Colmenero F., Plášil J., Cobos J., Sejkora J., Timón V., Čejka J., Fernández A.M, & Petříček V. (2019). Structural, mechanical, spectroscopic and thermodynamic characterization of the copper-uranyl tetrahydroxide mineral vandenbrandeite. RSC Advances, 9(69), 40708-40726.

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Raman Spectroscopic Analysis of Kasolite

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The natural mineral sample studied in this work is from the Jánská vein, Příbram base metal ore district, Czech Republic.^48,49 Kasolite sample is an aggregate of lath-like to acicular crystals. This mineral sample was analyzed using Raman spectroscopy. The Raman spectrum was recorded using incident radiation perpendicular to the direction of elongation of crystals. The Raman spectrum was collected in the range 4000–45 cm⁻¹ using a DXR dispersive Raman Spectrometer (Thermo Scientific) mounted on a confocal Olympus microscope. The Raman signal was excited by an unpolarised red 633 nm He–Ne gas laser and detected by a CCD detector. The experimental parameters were: 100× objective, 10 s exposure time, 100 exposures, 50 μm pinhole spectrograph aperture and 8 mW laser power level. The instrument was set up by a software-controlled calibration procedure using multiple neon emission lines (wavelength calibration), multiple polystyrene Raman bands (laser frequency calibration) and standardized white-light sources (intensity calibration). Spectral manipulations were performed using the Omnic 9 software (Thermo Scientific). The Raman spectrum was recorded for well-formed single-crystals of kasolite. Therefore, the possibility of the presence of impurities is very small.

Colmenero F., Plášil J., Cobos J., Sejkora J., Timón V., Čejka J, & Bonales L.J. (2019). Crystal structure, hydrogen bonding, mechanical properties and Raman spectrum of the lead uranyl silicate monohydrate mineral kasolite. RSC Advances, 9(27), 15323-15334.

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Raman Spectroscopy Analysis of Samples

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Raman spectra were recorded with a Thermo Fisher DXR Dispersive Raman spectrometer (Waltham, MA, USA) equipped with a CCD camera and a diode laser (λ = 780 nm). The following parameters were used during the measurements: the applied laser power was 12 and 24 mW at 25 µm slit aperture size; spectra were collected with an exposure time of 6 sec. The data were collected in the spectral range of 3300–200 cm⁻¹ using automated fluorescence corrections. OMNIC for Dispersive Raman 8 software package (Thermo Fisher Scientific, Waltham, MA, USA) was used for data collection, averaging a total of 20 scans. For the removal of cosmic rays, a convolution filter was applied to the original spectrum using Gaussian kernel.
In addition to recording individual spectra, the Raman mapping method was also applied to obtain images on the distribution of the ingredient in the samples. Spectra were collected using a five times six grid from the 750 times 250 µm size area of the samples, defined by the optical microscope.

Kondoros B.A., Jójárt-Laczkovich O., Berkesi O., Szabó-Révész P., Csóka I., Ambrus R, & Aigner Z. (2022). Development of Solvent-Free Co-Ground Method to Produce Terbinafine Hydrochloride Cyclodextrin Binary Systems; Structural and In Vitro Characterizations. Pharmaceutics, 14(4), 744.

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