Scanning electron microscopy was carried out using a Schottky Field Emission JEOL JSM-7600F instrument operational at an accelerating voltage of 0.1 to 30 kV. An Energy Dispersive X-ray Analyzer (EDX) was used to confirm the purity of the material. Powder X-ray diffraction analysis was performed on a PANanalytical X'Pert3 PRO Powder instrument fitted with Cu Kα radiation (λ = 1.54178 Å). UV-vis analysis of the Fe-doped CuS/Cu2S nanoparticles was done on a Shimadzu double-beam spectrophotometer model 1800. A Nicolet 6700 Infrared Spectrophotometer (Thermo Scientific, USA) was used to measure the FTIR spectra of the complexes and the ligand. X-ray Photoelectron Spectroscopy (XPS) was done to confirm the oxidation states using a Thermo Scientific K-alpha Photoelectron Spectrometer via monochromatic Al Kα radiation. Peak positions were regulated using the C 1s peak at 284.8 eV via Casa XPSTM software. The intensity of the solar light was measured by a solar radiation meter.
Nicolet 6700 infrared spectrophotometer
Manufactured by Thermo Fisher Scientific
Sourced in United States
The Nicolet 6700 is an infrared spectrophotometer manufactured by Thermo Fisher Scientific. It is designed to analyze the chemical composition of samples by measuring the absorption or transmission of infrared radiation through the sample. The device operates in the mid-infrared region of the electromagnetic spectrum, typically between 4,000 and 400 wavenumbers (cm⁻¹). The Nicolet 6700 can be used to identify, quantify, and characterize a wide range of organic and inorganic materials.
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Lab products found in correlation
Jsm 7600f, by JEOL (2 mentions)
K alpha photoelectron spectrometer, by Thermo Fisher Scientific (1 mentions)
Jsm 7500f, by JEOL (1 mentions)
X pert pro alpha 1 diffractometer, by Malvern Panalytical (1 mentions)
Axio observer a1, by Zeiss (1 mentions)
Axis ultra dld, by Shimadzu (1 mentions)
Uv 2550, by Shimadzu (1 mentions)
Ecs 400, by JEOL (1 mentions)
Arx400 spectrometer, by Bruker (1 mentions)
3 trimethylsilyl l propane sulfonic acid, by Merck Group (1 mentions)
7 protocols using nicolet 6700 infrared spectrophotometer
1
Comprehensive Characterization of Fe-doped CuS/Cu2S Nanoparticles
2
Characterization of Electrospun PCL/HAp Nanofibers
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The morphology of the electrospun PCL/HAp nanofibrous mats was viewed using a field emission scanning electron microscope (FE-SEM) (JSM7500F, JEOL, Japan) at an accelerating voltage of 5 kV. The pore size and contact angle of the mats were measured using a Capillary Flow Porometer (CFP-1100-A) (PMI, USA) and a Surface Tension Meter (XG-CAMA1, China). The mechanical properties of the pristine and welded nanofiber mats were measured on an ELF 3200 uniaxial testing system (Bose, Germany). Samples from the two groups were cut into testing strips of 0.25 cm × 1 cm, with a thickness of 10 μm. The samples were tested under uniaxial tension under quasi-static conditions, with a constant tensile speed of 1 mm s−1 along the direction of motion. X-ray diffraction (XRD) patterns and FT-IR spectra in ATR mode were obtained using an X’Pert PRO Alpha-1 diffractometer (PANalytical, The Netherlands) and a Nicolet 6700 infrared spectrophotometer (Thermo Fisher, USA).
3
Optical, Structural, and Chemical Analysis of Thin Films
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The optical transmittances of films were tested by a UV–vis spectrometer (UV-2550, Shimadzu, Kyoto, Japan) with a wavelength range of 200–1000 nm and a Carl Zeiss (Axio Observer A1, Jena, Germany) inverted microscope equipped with crossed polarizers (POM), respectively. The cross-sectional structure was observed by scanning electron microscopy (SEM), which was conducted by JSM-7600F (JEOL, Tokyo, Japan) at an accelerating voltage of 3 kV for magnification of ×2000. All the films were coated with a layer of gold before observation. The chemical structural information of the films was performed by a Fourier-transformed Nicolet 6700 infrared spectrophotometer (FTIR, Thermo Fisher Scientific, Waltham, MA, USA) equipped with an ATR accessory (ATR-FTIR) which had a scanning range of 800–4000 cm−1 and an X-ray photoelectron spectrometer (XPS, Shimadzu AXIS UltraDLD, Japan) to detect the elements of C, O, and Zn. The crystal information was collected by a Rigku (Tokyo, Japan) Ultima IV X-ray diffractometer (XRD) with Cu Kα-radiation (λ = 0.15419 nm). The obtained XRD patterns were fitted using the pseudo-Voigt peak shape with Maud Rietveld software (Version 2.7) [34 (link)]. The crystallinity index (CrI) of the samples was calculated based on the fitted results via the equation below:
4
Temperature-Dependent FTIR Analysis of Polyurea
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All the samples for Fourier Transform Infrared Spectroscopy (FTIR) were prepared by spreading the polyurea solution onto the surface of a KBr salt tablet. The FTIR spectra were recorded on a Nicolet 6700 infrared spectrophotometer (Thermo Fisher Scientific, Waltham, MA, USA) at a resolution of 2 cm−1. For the temperature-dependent FTIR scans, samples were placed into a heating cell connected to a temperature controller with the temperature range from 25 to 225 °C.
The software PeakFit (PeakFit 4.12) was adopted for curve fitting procedures of carbonyl group with Gaussian function. Three typical peaks of carbonyl groups were assumed during the fitting, while the integral areas of the three peaks were obtained by peak resolving. The mean square error of all the data were smaller than 0.05.
1H NMR spectra were recorded on JEOL ECS-400 (Tokyo, Japan) with CDCl3 or CF3COOD as the solvents using tetramethylsilane as an internal reference.
The software PeakFit (PeakFit 4.12) was adopted for curve fitting procedures of carbonyl group with Gaussian function. Three typical peaks of carbonyl groups were assumed during the fitting, while the integral areas of the three peaks were obtained by peak resolving. The mean square error of all the data were smaller than 0.05.
1H NMR spectra were recorded on JEOL ECS-400 (Tokyo, Japan) with CDCl3 or CF3COOD as the solvents using tetramethylsilane as an internal reference.
5
Structural and Mechanical Analysis of Delignified Wood
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The chemical compositions of both natural wood (NW) and delignified wood (DW) were qualitatively analyzed by a Nicolet 6700 infrared spectrophotometer (IR, Thermo Scientific, Waltham, MA, USA) equipped with an ATR accessory. The lignin contents (Klason lignin) of NW and DW were determined according to a standard TAPPI T 222 om-2 method [39 ]. The morphologies of NW, DW, compressed delignified wood by solvent exchange drying compressed under 0% moisture content (CDWSD0), 9% moisture content (CDWSD9), and 18 moisture content (CDWSD18) were characterized using a Phenom XL G2 Desktop scanning electron microscope. The mechanical properties of the samples were measured using an Academic User Instron 5969 Uniaxial Materials Testing System (Instron 5969, Norwood, MA, USA). At least ten specimens were tested for all samples and the averages and standard deviations were presented.
The densities of NW, DWSD, CDWSD0, CDWSD9, and CDWSD18 were determined from the ratios of mass to volume. The porosities of the above samples were calculated as follows:
where is the density of the cellulose nanofiber bulk material and is the density of the delignified wood, taken as 1.5 g∙cm−3.
The densities of NW, DWSD, CDWSD0, CDWSD9, and CDWSD18 were determined from the ratios of mass to volume. The porosities of the above samples were calculated as follows:
where is the density of the cellulose nanofiber bulk material and is the density of the delignified wood, taken as 1.5 g∙cm−3.
6
Structural Analysis of Freeze-Dried Sodium Alginates
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The freeze-dried sodium alginates were analyzed by Fourier transform infrared attenuated total reflectance (FTIR-ATR) and Proton Nuclear Magnetic Resonance ( 1 H NMR). FTIR-ATR measurements were performed using a Nicolet 6700 infrared spectrophotometer (Thermo Scientific, USA). The biopolymers (around 2 mg) were mixed with KBr (10 mg), pressed at 7 ton and dehydrated employing an infrared lamp for 30 min. Monitoring of the FTIR-ATR spectra was conducted from 600 to 1800 nm at 30 scan/min using the OPUS-2.52 software (Opus Software Limited, UK). 1 H NMR was conducted on a Bruker ARX400 spectrometer (Bruker BioSpin GmbH, Germany). Spectra of the alginate solutions (10 mg/mL) were obtained employing deuterated water as solvent and 3-(trimethylsilyl)-L-propane sulfonic acid (Sigma-Aldrich, USA) as internal standard. Measurements were performed at 75 • C and 400 MHz. The signals of the anomeric protons of the mannuronic (M, 4.70 ppm) and guluronic (G, 5.08, ppm) acids were identified, and the corresponding M/G ratio calculated.
7
FT-IR Spectroscopic Analysis of LLPs and Ac-LLPs
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The powders of LLPs and Ac-LLPs were fully dried. Then the dried samples were mixed with potassium bromide (spectroscopic grade) and pressed into pellets for spectrometric measurement, respectively. The FT-IR spectra of LLPs and Ac-LLPs were recorded and analyzed on a Thermo Scientific Nicolet 6700 infrared spectrophotometer (USA) at the frequency range of 400-4000 cm 1 (Fu et al., 2019) .
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