The morphology of synthesized RGO and structural features of RGO/PDMS scaffold were characterized by using JEOL JSM-7500FA Scanning Electron Microscope (SEM) and JEOL JSM-6490LA SEM respectively. For characterization of the scaffold with cells, freeze-dried samples were coated with platinum (15 nm) using an Edwards sputter coater and then assessed with the JEOL JSM-6490LA SEM.
Jsm 6490la sem
Manufactured by JEOL
Sourced in Japan
The JSM-6490LA is a Scanning Electron Microscope (SEM) manufactured by JEOL. It is designed to provide high-resolution imaging of a wide range of samples. The SEM utilizes a focused electron beam to scan the surface of a specimen, generating signals that are detected and used to create a magnified image. The JSM-6490LA offers a range of features and capabilities to facilitate various research and analytical applications.
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6 protocols using jsm 6490la sem
1
Characterizing Synthesized RGO and RGO/PDMS Scaffold
2
Electrical Characterization of LMMRE Composites
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A Screw Driven Linear Guide is used to form mechanical deformation of the LMMRE sample to measure its electrical characteristics. The two ends of the LMMRE sample were pasted with copper electrodes and fixed on the Linear Guide. In the compression and stretching test, the block sample (6 × 10 × 10 mm) and strip sample (4 × 6 × 10 mm) were uniformly compressed or stretched with a speed of 0.4 mm min−1. In the bending test, the size of the strip sample was 3 × 6 × 40 mm. A VICI Digital Multimeter (VC8145) is used to measure electrical data such as the resistance of the composite and the current of the heating device. The digital multimeter has a resistance range of 100 MΩ, so it can measure a resistivity of one million Ω∙m for the block sample (6 × 10 × 10 mm). The MTS Landmark 370.02 hydraulic load frame is used to measure the stress-strain curve and Young’s modulus of the composites. SEM images were obtained using a JEOL JSM-6490LA SEM. A Cat S60 FLIR infrared thermal camera was used to obtain the thermal images and videos. COMSOL Multiphysics 5.1 software package (Burlington, MA, USA) was used to simulate the distribution of Fe microparticles and EGaIn microdroplet upon stretching, as well as calculate the change of resistivity of the LMMRE.
3
Nanoscale Imaging via SEM Sample Preparation
4
Biofouling Assessment of BC5 and AgNP-coated Cryogels
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For the definition
of the biofouling
properties, the BC5 and AgNP-coated BC5 cryogels were positioned in
a glass chamber, floating on a bacterial suspension (E. coli 1 × 105 CFU mL–1 in LB medium) under 1 Sun irradiation for 1.5 h. During the solar
exposure also, the SER was monitored. After their removal from the
solution, the samples were incubated overnight in an LB medium at
37 °C. Subsequently, the bacterial growth was evaluated through
OD600 measurements, and to visually determine the bacterial
presence on the samples, SEM analysis was performed. Briefly, samples
were fixed with 1.5% glutaraldehyde in 0.1 M sodium-cacodylate buffer
for 2 h at room temperature and post-fixed in 1% osmium tetroxide
in MilliQ water. After several washes in MilliQ water, the samples
were dehydrated in increasing ethanol solutions (starting from 30
to 100%), 1:1 ethanol/hexamethyldisilazane (HDMS, Sigma-Aldrich) solutions,
and 100% HMDS and air-dried. Samples were finally coated with a 10
nm thick film of gold and analyzed using a JEOL JSM-6490LA SEM with
an acceleration voltage of 10 kV.
of the biofouling
properties, the BC5 and AgNP-coated BC5 cryogels were positioned in
a glass chamber, floating on a bacterial suspension (E. coli 1 × 105 CFU mL–1 in LB medium) under 1 Sun irradiation for 1.5 h. During the solar
exposure also, the SER was monitored. After their removal from the
solution, the samples were incubated overnight in an LB medium at
37 °C. Subsequently, the bacterial growth was evaluated through
OD600 measurements, and to visually determine the bacterial
presence on the samples, SEM analysis was performed. Briefly, samples
were fixed with 1.5% glutaraldehyde in 0.1 M sodium-cacodylate buffer
for 2 h at room temperature and post-fixed in 1% osmium tetroxide
in MilliQ water. After several washes in MilliQ water, the samples
were dehydrated in increasing ethanol solutions (starting from 30
to 100%), 1:1 ethanol/hexamethyldisilazane (HDMS, Sigma-Aldrich) solutions,
and 100% HMDS and air-dried. Samples were finally coated with a 10
nm thick film of gold and analyzed using a JEOL JSM-6490LA SEM with
an acceleration voltage of 10 kV.
5
Comprehensive Characterization of ZnO Nanoparticles
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To confirm the biosynthesis and crystallinity of the ZnO NPs, they were subjected to X-ray Diffraction (XRD) (Model-D8 Advance, Bruker, Mannheim, Germany).
For size and morphological analysis, scanning electron microscopy (SEM) was carried out by using JEOL-JSM-6490LA SEM (JEOL, Tokyo, Japan). Instrument works at 20 kV with 2838 counts per second.
Fourier transform infrared (FTIR) spectroscopy (SHIMADZU 8100 M FTIR, Shimadzu, Kyoto, Japan) was done to study the presence of bio-molecules as capping agents on ZnO NPs surface in the range of 400–4000 cm−1.
For determination of thermal stability, thermo-gravimetric analysis (TGA) was conducted. The samples were studied at a temperature ranging from 0 to 1100 °C under a nitrogen atmosphere with an increase of 10 °C/min using TGA (TGA/DSC1, Star e System, Mettler Toledo, Giessen, Germany).
For size and morphological analysis, scanning electron microscopy (SEM) was carried out by using JEOL-JSM-6490LA SEM (JEOL, Tokyo, Japan). Instrument works at 20 kV with 2838 counts per second.
Fourier transform infrared (FTIR) spectroscopy (SHIMADZU 8100 M FTIR, Shimadzu, Kyoto, Japan) was done to study the presence of bio-molecules as capping agents on ZnO NPs surface in the range of 400–4000 cm−1.
For determination of thermal stability, thermo-gravimetric analysis (TGA) was conducted. The samples were studied at a temperature ranging from 0 to 1100 °C under a nitrogen atmosphere with an increase of 10 °C/min using TGA (TGA/DSC1, Star e System, Mettler Toledo, Giessen, Germany).
6
Characterization of CeO2 Nanoparticles
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The size and shape of synthesized CeO2 NPs were studied using JEOL-JSM-6490LA SEM (JEOL, Tokyo, Japan) operating at 20 kV with a counting rate of 2,838 cps.
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