scholarly journals Effect of the Zr-Substitution on the Structural and Electrical Properties of LaFeO3: XRD, Raman Scattering, SEM, and Impedance Spectroscopy Study

Crystals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 399
Author(s):  
Djoko Triyono ◽  
Ismi Purnamasari ◽  
Rifqi Almusawi Rafsanjani
Keyword(s):  
Crystal Structure ◽  
Impedance Spectroscopy ◽  
Raman Scattering ◽  
Conduction Mechanism ◽  
Sol Gel ◽  
Dielectric Parameters ◽  
Impedance Spectroscopy Study ◽  
Structural And Electrical Properties ◽  
Characteristics Analysis ◽  
Annealing Method

The LaFe1−xZrxO3 (x = 0.01, 0.05) ceramics were prepared by sol-gel and annealing method and studied by XRD, Raman scattering analysis, SEM, and impedance spectroscopy method. The crystal structure and phonon characteristics analysis revealed that the crystal structure tends to preserve its ideal orthorhombic structure, following the increase in driving force of the Fe/ZrO6 octahedral tilting. The frequency-dependent dielectric parameters at each temperature decreased with increasing Zr content. The temperature dependence dielectric relaxation and dc conduction mechanism satisfied the Arrhenius law and increased with increasing Zr content. The activation energy ranged from 0.30 to 0.50 eV and was similar in the relaxation and conduction mechanisms, indicating that both transport mechanisms were based on a similar mechanism.

Effect of Strontium Doping Into CaBi2Nb2O9 Aurivillius Oxide Nanoceramics: Structural and Electrical Properties

2020 ◽  
Vol 15 (1) ◽  
pp. 32-40
Author(s):  
Ouissem Jalled ◽  
Mariah Alhassan ◽  
Seham R. Alharbi ◽  
Zaynab Alharbi ◽  
Yas Al-Hadeethi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Sol Gel ◽  
Orthorhombic Crystal ◽  
Orthorhombic Crystal Structure ◽  
Thermogravimetric Analyzer ◽  
Transmission Electron ◽  
Structural And Electrical Properties ◽  
Gel Combustion ◽  
Dielectric Constant Measurement

Herein, we report the synthesis and characterization of Ca1-xSrxBi2Nb2O9 (CSBNO) (0 ≤ x ≤ 1) nanoceramics prepared using sucrose-assisted sol–gel combustion methods. The synthesized nanoceramics were characterized by different tools like differential thermal and thermogravimetric analyzer (DTA-TG), high resolution transmission electron microscopy (HRTEM), Fourier transform infrared (FTIR) spectrometer, X-ray powder diffraction (XRD), and impedance analyzer. DTA-TG reveals that the optimum temperature of calcination of CBN is higher than 1000 °C. The FTIR revealed the formation of CaBi2Nb2O9 (CBNO) at 614 cm-1. The XRD confirmed that all samples exhibited orthorhombic crystal structure. Increased orthorhombic distortion was spotted for doped CBNO and the structure acquires extra orthorhombicity through Sr doping. The TEM measurement inspected the increase of the grain size due to the inclusion of strontium into the orthorhombic crystal structure of CBNO from 56 nm to 76 nm. The dielectric constant measurement demonstrated that the increase in Sr content is associated with steady decrease in Curie temperature from 1207 K up to 720 K. The dielectric loss exhibited a minimum value at x = 0.5 and high stability along the temperature range of 300–850 K. Such property may enable this nanocomposite to be used for the application of FeRAM.

Structural and impedance spectroscopy study of Al‐doped ZnO nanorods grown by sol‐gel method

2012 ◽  
Vol 29 (3) ◽  
pp. 131-135 ◽  
Author(s):  
Muhammad Kashif ◽  
Uda Hashim ◽  
Eaqub Ali ◽  
Ala'eddin A. Saif ◽  
Syed Muhammad Usman Ali ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Spectroscopy Study ◽  
Gel Method ◽  
Sol Gel Method ◽  
Impedance Spectroscopy Study ◽  
Doped Zno

scholarly journals Correction: Nafion film transport properties in a low-Pt PEM fuel cell: impedance spectroscopy study

RSC Advances ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 6764-6765
Author(s):  
Tatyana Reshetenko ◽  
Andrei Kulikovsky
Keyword(s):  
Fuel Cell ◽  
Impedance Spectroscopy ◽  
Transport Properties ◽  
Pem Fuel Cell ◽  
Spectroscopy Study ◽  
Cell Impedance ◽  
Impedance Spectroscopy Study ◽  
Nafion Film

Correction for ‘Nafion film transport properties in a low-Pt PEM fuel cell: impedance spectroscopy study’ by Tatyana Reshetenko et al., RSC Adv., 2019, 9, 38797–38806, DOI: 10.1039/C9RA07794D.

Structural and electrical properties of sol–gel grown nanostructured ZnO and LaMnO3 particle-based nanocomposites

2021 ◽  
Vol 127 (2) ◽  
Author(s):  
Naisargi Kanabar ◽  
Keval Gadani ◽  
V. G. Shrimali ◽  
Khushal Sagapariya ◽  
K. N. Rathod ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Sol Gel ◽  
Structural And Electrical Properties

scholarly journals Surface Chemistry, Crystal Structure, Size and Topography Role in the Albumin Adsorption Process on TiO2 Anatase Crystallographic Faces and Its 3D-Nanocrystal: A Molecular Dynamics Study

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 420
Author(s):  
Giuseppina Raffaini
Keyword(s):  
Crystal Structure ◽  
Molecular Dynamics ◽  
Surface Chemistry ◽  
Protein Adsorption ◽  
Adsorption Process ◽  
Sol Gel ◽  
Interaction Strength ◽  
Theoretical Work ◽  
Blood Protein ◽  
Tio2 Anatase

TiO2 is widely used in biomaterial implants. The topography, chemical and structural properties of titania surfaces are an important aspect to study. The size of TiO2 nanoparticles synthetized by sol–gel method can influence the responses in the biological environment, and by using appropriate heat treatments different contents of different polymorphs can be formed. Protein adsorption is a crucial step for the biological responses, involving, in particular, albumin, the most abundant blood protein. In this theoretical work, using molecular mechanics and molecular dynamics methods, the adsorption process of an albumin subdomain is reported both onto specific different crystallographic faces of TiO2 anatase and also on its ideal three-dimensional nanosized crystal, using the simulation protocol proposed in my previous theoretical studies about the adsorption process on hydrophobic ordered graphene-like or hydrophilic amorphous polymeric surfaces. The different surface chemistry of anatase crystalline faces and the nanocrystal topography influence the adsorption process, in particular the interaction strength and protein fragment conformation, then its biological activity. This theoretical study can be a useful tool to better understand how the surface chemistry, crystal structure, size and topography play a key role in protein adsorption process onto anatase surface so widely used as biomaterial.

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