The fluorescence spectrophotometer (F-4500, HITACHI, Japan) and the UV-2450 spectrometer (Shimadzu, Japan) were selected to record the fluorescence spectra and the absorption spectra of carbon dots, respectively. The JEM 2100F STEM (JEOL, Japan) and the XRD (D8 Advance, Bruker, Germany) were used to record TEM image and XRD patterns of the carbon dots, respectively.
Jem 2100f stem
Manufactured by JEOL
Sourced in Japan, United States
The JEM 2100F STEM is a high-resolution transmission electron microscope (TEM) that can operate in both scanning transmission electron microscopy (STEM) and conventional TEM modes. It is capable of producing high-quality images and analytical data at the nanometer scale.
Automatically generated - may contain errors
Lab products found in correlation
Escalab 250xi spectrometer, by Thermo Fisher Scientific (2 mentions)
D8 advance xrd, by Bruker (1 mentions)
F 4500, by Hitachi (1 mentions)
Uv 2450 spectrometer, by Shimadzu (1 mentions)
Ht 7700 tem, by JEOL (1 mentions)
400 mhz nmr spectrometer, by Bruker (1 mentions)
In vivo imaging system ivis, by PerkinElmer (1 mentions)
Xrd 6000, by Shimadzu (1 mentions)
Sta 449 c jupiter system, by Netzsch (1 mentions)
Microphot fxa microscope, by Nikon (1 mentions)
Asap 2020 volumetric adsorption analyzer, by Micromeritics (1 mentions)
Smartlab intelligent x ray diffraction system, by Rigaku (1 mentions)
Jsm 6700f field emission sem, by JEOL (1 mentions)
Labram hr system, by Horiba (1 mentions)
5 protocols using jem 2100f stem
1
Characterization of Carbon Dots
2
Comprehensive Analytical Methods for Nanoparticle Characterization
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1H NMR spectra was measured by a 400 MHz NMR spectrometer (Bruker) at room temperature. GPC was performed using a GPC‐1515 instrument (USA) [Column type: Styragel HT6E*2, HT2, Column length: 7.8*30 mm, Detector: 2414, pump 1515, Test temperature: 40 ℃, flow: 1 mL min−1, eluent: THF]. UV–Vis–NIR spectra were recorded using a spectrophotometer (TU‐1901). The photothermal performance was measured by an infrared thermal camera (FOTRIC 225s). Size and zeta potential measurements were conducted on a Zetasizer (Nano ZS, UK). TEM images were recorded by and Hitachi HT‐7700 TEM (Japan), while STEM images were recorded by JEOL JEM‐2100F STEM (USA). MTT assay was conducted using a Microplate reader (SpectraMax). The small animal imaging was performed by an In Vivo Imaging System (IVIS, Perkin Elmer).
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1H NMR spectra was measured by a 400 MHz NMR spectrometer (Bruker) at room temperature. GPC was performed using a GPC‐1515 instrument (USA) [Column type: Styragel HT6E*2, HT2, Column length: 7.8*30 mm, Detector: 2414, pump 1515, Test temperature: 40 ℃, flow: 1 mL min−1, eluent: THF]. UV–Vis–NIR spectra were recorded using a spectrophotometer (TU‐1901). The photothermal performance was measured by an infrared thermal camera (FOTRIC 225s). Size and zeta potential measurements were conducted on a Zetasizer (Nano ZS, UK). TEM images were recorded by and Hitachi HT‐7700 TEM (Japan), while STEM images were recorded by JEOL JEM‐2100F STEM (USA). MTT assay was conducted using a Microplate reader (SpectraMax). The small animal imaging was performed by an In Vivo Imaging System (IVIS, Perkin Elmer).
3
Detailed Catalyst Characterization Protocol
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XRD patterns were obtained on a Shimadzu XRD-6000 using Cu Kα
radiation operated at 40 kV and 30 mA. STEM images were recorded on
a JEOL JEM2100F S/TEM in a high-angle annular dark-field STEM mode
at an operating voltage of 200 kV. The gold content and molar ratio
of nickel to aluminum of catalysts were measured by ICP–AES.
XPS were performed under ultrahigh vacuum (<10–6 Pa) on a Thermo Scientific ESCALAB 250Xi spectrometer with an Al
anode (Al Kα = 1486.6 eV). All binding energies were calibrated
using contaminant carbon (C 1s = 284.6) as the reference. CO2-TPD was examined on a micromeritics chemisorb 2720 instrument with
a thermal conductivity detector. An ATR-IR spectroscope was equipped
with a DTGS detector, and the spectrum was recorded with a Nicolet
5700 spectrometer.
radiation operated at 40 kV and 30 mA. STEM images were recorded on
a JEOL JEM2100F S/TEM in a high-angle annular dark-field STEM mode
at an operating voltage of 200 kV. The gold content and molar ratio
of nickel to aluminum of catalysts were measured by ICP–AES.
XPS were performed under ultrahigh vacuum (<10–6 Pa) on a Thermo Scientific ESCALAB 250Xi spectrometer with an Al
anode (Al Kα = 1486.6 eV). All binding energies were calibrated
using contaminant carbon (C 1s = 284.6) as the reference. CO2-TPD was examined on a micromeritics chemisorb 2720 instrument with
a thermal conductivity detector. An ATR-IR spectroscope was equipped
with a DTGS detector, and the spectrum was recorded with a Nicolet
5700 spectrometer.
4
Comprehensive Material Characterization Protocol
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The samples were characterized by different analytical techniques. Simultaneous TG/DSC analysis was performed on a NETZSCH STA 449 C Jupiter system. Optical image was captured on a Nikon Microphot-FXA microscope. SEM observations were made on a JEOL JSM-6700F field-emission SEM. TEM images, SAED pattern, EELS, and EDS were obtained on a JEOL JEM-2100F STEM (200 kV, field-emission gun) system equipped with an Oxford INCA x-sight EDS and an ENFINA 1000 EELS. XPS spectra were acquired on a Thermo Scientific Escalab 250Xi spectrometer. XRD measurement was conducted using a Rigaku SmartLab Intelligent X-ray diffraction system with filtered Cu Kα radiation (λ = 1.5406 Å, operating at 45 kV and 200 mA). Raman measurement was taken using a Horiba Jobin Yvon LabRAM HR system with a laser wavelength of 488 nm. The nitrogen adsorption and desorption isotherms were obtained at 77 K with a Micromeritics ASAP 2020 volumetric adsorption analyzer.
5
Atomic-Resolution STEM Imaging of Au-Ag BNPs
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Atomic resolution STEM imaging was performed by a JEOL JEM 2100F STEM instrument operating at 200 keV equipped with a spherical aberration (Cs) probe corrector (CEOS GmbH) and high-angle annular dark-field (HAADF) detector, with inner and outer collection angles of 62 and 164 mrad. The cluster size distribution of the Au-Ag BNPs were measured with low magnification images for more than 100 BNPs. The cluster size was determined by measuring the diameter cross-section of individual clusters. Assignment of core-shell structure was possible because of the Z-contrast of HAADF-STEM (Z is the elemental atomic number). The HAADF-STEM intensity is proportional to Z 1.46 with the camera length employed. 70 The large difference of the atomic number between Au and Ag (Z Au =79; Z Ag =47) allows us to distinguish the elemental atomic arrangement within the clusters directly from HAADF-STEM image intensity contrast. The STEM image analyzes were carried out with the imageJ Fiji software. The intensity profile of each single cluster was obtained by first finding the position of the centre through averaging, and then binning the intensity in polar coordinates as a function of the radial distance to the centre.
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