The structure of the BI (in the form of a potassium bromide pellet) was examined via Fourier transform infrared (FT-IR) spectroscopy (NEXUS Instruments; Thermo Nicolet NEXUS 670) (Thermo Fisher Scientific, Waltham, MA, USA) in the scan range of 600–4000 cm−1 at a resolution of 1 cm−1 and nuclear magnetic resonance (1H-NMR) spectroscopy (Varian; Unity Inova 500 MHz) (Agilent, CA, USA).
Thermo nicolet nexus 670
Manufactured by Thermo Fisher Scientific
Sourced in United States
The Thermo Nicolet Nexus 670 is a Fourier Transform Infrared (FTIR) spectrometer designed for analytical applications. It provides high-performance infrared spectroscopy capabilities for various sample types. The core function of the Nexus 670 is to analyze the infrared absorption or transmission characteristics of samples in order to identify their chemical composition and molecular structure.
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Lab products found in correlation
9 protocols using thermo nicolet nexus 670
1
Structural Analysis of Biomaterial via FT-IR and NMR
2
FTIR Analysis of Fiber Surface
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The surface functionality of fibres was examined with Thermo Nicolet Nexus 670 FTIR equipment (Thermo Fisher Scientific Inc., Waltham, MA, USA) in the 4000–600 cm−1 wavenumbers range with resolution retained at 4 cm−1. The fibres were mixed with potassium bromide (KBr) by grinding and then pelletized prior to analysis.
3
Electrochemical Characterization of Graphite Electrode
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For electrochemical experiments, a PGSTAT-12 potentiostat/galvanostat device (ECO Chemie, Netherlands) equipped with GPES software was used. In addition, electrochemical impedance spectroscopy (EIS) was performed by Ivium potentiostat/galvanostat (CompactStat.h, Ivium Technologies BV) linked to Ivium software. For electrochemical research work, a pencil core with diameter of two mm and HB hardness (German Routing Company) was used. The modified pencil graphite was used as the working electrode. An Ag/AgCl and a Pt wire were used as reference and counter electrodes, respectively. All electrochemical measurements were performed at room temperature.
The synthesized materials and the electrode surface were characterized using FTIR, SEM, XRD, TGA, and EDX techniques. The infrared spectrum (FTIR) was recorded, in the range of 4000–400 cm−1, using KBr pellets on a Win-Bomem spectrometer (Version 3.04 Galatic Industries Corporation and Thermo Nicolet Nexus 670). To identify the synthesized compounds, Powder XRD (PXRD) data were collected at 297 K on Bruker D8 Advance equipped with CuKα radiation (λ = 0.15406 nm). Scanning electron microscopy (SEM) images and EDX analyses were recorded using a ProX model SEM (Netherlands) with a gold coating thickness of up to several angstroms.
The synthesized materials and the electrode surface were characterized using FTIR, SEM, XRD, TGA, and EDX techniques. The infrared spectrum (FTIR) was recorded, in the range of 4000–400 cm−1, using KBr pellets on a Win-Bomem spectrometer (Version 3.04 Galatic Industries Corporation and Thermo Nicolet Nexus 670). To identify the synthesized compounds, Powder XRD (PXRD) data were collected at 297 K on Bruker D8 Advance equipped with CuKα radiation (λ = 0.15406 nm). Scanning electron microscopy (SEM) images and EDX analyses were recorded using a ProX model SEM (Netherlands) with a gold coating thickness of up to several angstroms.
4
FTIR Analysis of Dried Bread Roll Powder
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The freeze-dried bread roll powder was mixed with dry spectroscopic-grade potassium bromide powder in a mass ratio of 1:100. The ground sample was pressed into tablets and placed on the sample rack of FTIR (Thermo Nicolet NEXUS670, Thermo Fisher Science Inc., Waltham, MA, USA). The sample was scanned over the range of 4000 to 400 cm−1 with 32 scans and 4 cm−1 resolution [21 (link)].
5
Characterization of Polysaccharide Bead Compositions
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Fourier transform infrared (FTIR) spectrum of glycerol, alginate, chitosan, AG, and ACG beads were recorded using a transmittance mode iS50 Thermo Nicolet Nexus 670 FTIR (Thermo Scientific, Waltham, MA, USA) with a built-in diamond crystal. The absorbance pattern of diamond typically seen between 1,900 and 2,400 cm−1 was erased. No bonds were observed in that area. Analysis was performed within the spectral region of 400 to 4,000 cm−1 with 32 scans recorded at 4 cm−1 resolution. FTIR spectra from the different bead preparations were compared to evaluate chemical modifications.
6
Characterization of MnPB Nanoparticles
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Transmission electron microscopy (TEM) of the MnPB nanoparticles was performed using a JEM-2100 FEG high-resolution instrument (JEOL, Ltd, Tokyo, Japan) at 200 kV. Energy-dispersive X-ray spectroscopy was performed using an Inca 250 (Oxford Instruments, Abingdon, UK) coupled to the high-resolution TEM. Three scans of different parts of the MnPB sample were performed and averaged to obtain the relative percentages of iron, potassium, and manganese (Supplementary materials). X-ray diffraction patterns of the MnPB nanoparticles were measured on a D8 Advance powder diffractometer using CuKα radiation, and Topas software (Bruker AXS GmbH, Karlsruhe, Germany) was utilized for peak fitting via a fundamental parameters approach. Fourier transform infrared (FTIR) spectra of the MnPB nanoparticles were recorded on an FTIR spectrometer (Thermo Nicolet Nexus 670, Thermo Fisher Scientific) using MnPB nanoparticle powders pressed against a ZnSe-attenuated total reflectance anvil.
7
Infrared Spectroscopy of Neat Samples
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Infrared spectra were recorded as neat samples from (4000 to 650) cm−1 on a Thermo Nicolet Nexus 670 spectrometer (Thermo Fisher Scientific Inc., Waltham, MA, USA) fitted with a Universal ATR Sampling Accessory (Thermo Fisher Scientific Inc., Waltham, MA, USA). The measurements were performed with a total of 60 scans, at T = 298.15 K, and with a spectral resolution of 2 cm−1. The software package Omnic version 6.2 was used in the data acquisition and spectral analysis.
8
FTIR Analysis of Dehydrated Pectin
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Prior to FTIR analysis, freeze dried pectin sample was dehydrated at 45 °C for at least 2 h to minimize the impact of the residual moisture. After that, the pectin sample (5 mg) was mixed with KBr (1:100 w/w) and pressed into a semitransparent pellet for FTIR analysis. The spectrum was recorded using an IR spectrometer (Thermo Nicolet Nexus 670, Thermo Scientific Inc., Waltham, MA, USA) within the frequency range of 4000 to 400 cm − 1, and the sample was scanned 32 times at the resolution of 4 cm−1.
9
Comprehensive Structural and Chemical Characterization
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Field-emission scanning electron microscopy (FE-SEM, S4800, Hitachi, Tokyo, Japan) and high-resolution transmission electron microscopy (HR-TEM, JEM2100, JEOL Ltd., Beijing, China) were used to investigate the morphologies of the samples. The crystal structures of the samples were determined by X-ray diffraction (XRD) (DX-2700) using Cu-Kα (30 kV, 25 mA, λ = 1.5406 Å) radiation over a 2θ range of 5–80°. A Dilor LABRAM-1B multi-channel confocal microspectrometer with an excitation wavelength of 532 nm was applied to record the Raman spectra. The surface chemical compositions of samples were investigated using X-ray photoelectron spectroscopy (XPS, ESCALAB 250, Thermo Scientific, Waltham, MA, USA). The thermogravimetry (TG) of the nanocomposites was performed in air atmosphere from room temperature to 800 °C at a heating rate of 10 °C min−1. Fourier transform infrared spectrometry (FT-IR) (Thermo Nicolet NEXUS 670, Thermo Scientific, Waltham, MA, USA). with a wavelength range from 400 to 4000 cm−1 was applied to identify the functional groups of samples. On the 3H-2000BET-A system, N2 adsorption-desorption isotherms were determined at liquid nitrogen temperature.
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