Two amber fractions from different kidney-shaped amber pieces that had been washed in order to remove surface finger grease and dust were selected: a pseudoinclusion-rich, dark fraction, and pseudoinclusion-void, light fraction. From them, solid amber samples were pulverized and analyzed using the KBr tablet technique (1 wt% sample) on a BRUKER IFS66v spectrometer, at the Servicio Interdepartamental de Investigación (SIdI) of the Universidad Autónoma de Madrid (UAM), Spain. A total of 250 scans were taken to improve the signal to noise ratio in the 7000–550 cm−1 range. The normal resolution was 4 cm−1.
Ifs 66v spectrometer
Manufactured by Bruker
Sourced in Germany
The IFS 66V spectrometer is a laboratory instrument designed for infrared spectroscopy. It is capable of analyzing the infrared absorption or transmission characteristics of various samples. The core function of the IFS 66V is to provide accurate and reliable infrared spectral data for research and analytical applications.
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17 protocols using ifs 66v spectrometer
1
Characterization of Amber Fractions
2
Comprehensive Characterization of IESM
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Different characterization techniques are used to investigate the chemical and structure composition of IESM as shown in Figs 2 –4 and 9 . The SEM has been powerful tool for characterizing fundamental physical properties and surface morphology of the samples. The morphology of IESM can be studied by coating sample with platinum (Pt) sputter using Pt 20 mA 120 mode with Scanning electron microscopy (SEM) Jeol JSM-7600F. The damages may occur on the surface of an IESM during fabrication process. For this reason, the fabricated sensor was observed with optical microscope after each step to make sure that, IESM was intact and IDEs were properly fabricated with the DMP-3000 inkjet printer. 2D and 3D nano profile of top electrode and IESM was analyzed with NV-2000 Universal non-contact surface profiler for roughness measurement in phase shifting minterferometry (PSI) mode. The Fourier transform infrared spectroscopy (FTIR) spectra of an IESM were recorded on a Bruker IFS 66 V spectrometer by using the potassium bromide (KBr) pellet, at a resolution 4 cm−1. EDS mapping is performed to confirm the element by element composition of IESM using TESCAN MIRA 3 STEM.
3
FTIR-ATR Spectroscopy Analysis of Materials
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FTIR–ATR spectroscopy was used to characterize the presence of specific chemical groups in the materials. FTIR spectra were performed in ATR mode with a Bruker IFS 66V spectrometer. The spectra were the results of 64 co-added interferograms at 4 cm−1 and resolutions in the wavenumber range from 4000 to 400 cm−1. The spectra analyses were performed using OPUS Software Version 7.
4
High-field magneto-optic study of graphene
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The basic sample configuration and measurement scheme are similar to that in ref. 1 (link). The data at magnetic fields higher than 5 Tesla was collected at the SCM3 in the National High Magnetic Field Laboratory (NHMFL). Sample temperature in the Cornell setup is ~10 K, whereas that in the NHMFL setup is ~5 K owing to the helium exchange gas environment. A Bruker IFS 66 v spectrometer was used at NHMFL. The illumination is focused by a ZnSe lens located outside (inside) the cryostat at Cornell (NHMFL). The thickness of hBN flakes is ~20 nm for both top and bottom gates. All the measurement is done at a total charge density of zero to minimize the dark current noise. The displacement field is calculated by using a dielectric constant of boron nitride of 3.9. The data in this manuscript are mostly based on two separate high-quality graphene samples.
5
Perovskite ATR-IR and Far-IR Spectroscopy
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Powdered perovskites are placed onto a molybdenum crystal to measure the attenuated total reflection infrared (ATR-IR) spectra using a Bruker Tensor 37 FTIR instrument in the 800–4000 cm−1 mid-infrared region with an average of 256 scans. Exposure of the sample to water is conducted in the same way as with photoluminescence measurements and with the same exposure unit.
Far-infrared spectra are measured using a Bruker IFS66v spectrometer with 6 μm mylar beamsplitter and an average of 128 scans. All measurements are carried out with 4 cm−1 resolution.
Far-infrared spectra are measured using a Bruker IFS66v spectrometer with 6 μm mylar beamsplitter and an average of 128 scans. All measurements are carried out with 4 cm−1 resolution.
6
Cationic Polymerization of Tung Oil: FT-IR Analysis
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The cationic
polymerization of tung oil was confirmed by the evaluation of C=C
bonds before and after polymerization using FT-IR analysis. Homogeneous
solutions of tung oil and PCL in chloroform with and without the cationic
initiator were placed on a KBr salt plate. The FT-IR spectra of the
blend were recorded on a Bruker IFS-66V spectrometer (Billerica, MA)
after evaporation of chloroform. The completely reacted tung oil/PCL
70/30 wt % blend was crushed into powder in liquid nitrogen, and the
powder/KBr mixture was compressed into a plate, which was characterized
with the same spectrometer.
polymerization of tung oil was confirmed by the evaluation of C=C
bonds before and after polymerization using FT-IR analysis. Homogeneous
solutions of tung oil and PCL in chloroform with and without the cationic
initiator were placed on a KBr salt plate. The FT-IR spectra of the
blend were recorded on a Bruker IFS-66V spectrometer (Billerica, MA)
after evaporation of chloroform. The completely reacted tung oil/PCL
70/30 wt % blend was crushed into powder in liquid nitrogen, and the
powder/KBr mixture was compressed into a plate, which was characterized
with the same spectrometer.
7
Time-Resolved FTIR Spectroscopy of Labeled Proteins
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Two-color step-scan FTIR spectroscopy with a time resolution of 2.5 ms was performed on an IFS 66v spectrometer (Bruker) as described in Ihalainen et al. 5 The detection window was extended to 2256 cm À1 to include the label region by placing an LP-4500 filter (Spectrogon) and CaF 2 windows in front of the detector. 24 316 discrete mirror positions were stepped and undersampling was applied for FT. The resulting spectral resolution was 8 cm À1 . To increase the signal in the label region, the path length was adjusted to achieve an A 1650 4 1.1, while keeping the protein concentration the same as in the steady-state experiments to ensure a sufficient hydration of the sample. The resulting high water absorption in the amide I region caused a saturation in the region of 1610 to 1670 cm À1 , which was therefore left out in the global analysis of the difference spectra. 15 experiments on F203pAzF, 8 experiments on Y176pAzF and 11 experiments on Y472pAzF were averaged with 8 coadditions each, while exchanging the sample after less than 8000 excitations. All experiments were performed at 20 1C.
8
Infrared Spectroscopy of Nanoparticles
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Spectra were recorded with an IFS 66v spectrometer (Bruker) equipped with a liquid nitrogen-cooled MCT detector. Samples (10 μL of pure NDs, AuNP-decorated NDs, and metallized AuNDs) were dried on a diamond attenuated total reflectance (ATR) cell (Resultec). The 1:10 diluted buffer A (5 mM Tris–HCl, 20 mM NaCl, pH 7.4) was used as reference for the pure and the AuNP-decorated NDs while as the AuND reference, a sample of AuNPs incubated with gold enhancement solution was used. 256 interferograms were recorded at a resolution of 2 cm−1 and averaged to obtain absorption spectra in reference to the pure ATR crystal.
9
Comprehensive Characterization of HAmDHotaz
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All
reagents and solvents were commercially available except for HAmDHotaz,
which was prepared as reported previously.31 (link) Elemental analyses were performed with a Carlos Erba 1108 microanalyzer. 1H, 13C NMR spectra were obtained as DMSO-d6 solutions with a Bruker AMX 300 spectrometer.
IR spectra were recorded as KBr disks (4000–400 cm–1) and polyethylene-sandwiched Nujol mulls (500–100 cm–1) with a Bruker IFS-66v spectrometer. Mass spectra
were obtained in a BIOTOF II API 4000 spectrometer for ESI.
reagents and solvents were commercially available except for HAmDHotaz,
which was prepared as reported previously.31 (link) Elemental analyses were performed with a Carlos Erba 1108 microanalyzer. 1H, 13C NMR spectra were obtained as DMSO-d6 solutions with a Bruker AMX 300 spectrometer.
IR spectra were recorded as KBr disks (4000–400 cm–1) and polyethylene-sandwiched Nujol mulls (500–100 cm–1) with a Bruker IFS-66v spectrometer. Mass spectra
were obtained in a BIOTOF II API 4000 spectrometer for ESI.
10
FTIR-ATR Characterization of Materials
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FTIR-ATR spectroscopy was used to characterize the presence of specific chemical groups in the materials. FTIR spectra were performed in ATR mode with a Bruker IFS 66V spectrometer. The spectra were the results of 64 co-added interferograms at 4 cm−1 and resolutions in the wavenumber range from 4000 to 400 cm−1. The spectra analyses were performed using OPUS Software Version 7 (Ettlingen, Karlsruhe, Germany).
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