Application of Energy-Dispersive X-ray Elemental Mapping To Probe the Homogeneity of Sol-Gel Derived YBa2Cu3O7-.delta. and Related Phases

1995 ◽  
Vol 7 (4) ◽  
pp. 649-656 ◽  
Author(s):  
Carol S. Houk ◽  
Gary A. Burgoine ◽  
Catherine J. Page
Keyword(s):  
Sol Gel ◽  
Energy Dispersive ◽  
Elemental Mapping ◽  
X Ray

Synthesis, Characterization, and Photovoltaic Performance of CdO-Based Nano Hybrid Material in Solid-State Dye-Sensitized Solar Cells

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Arifa Batool ◽  
Syed Mujtaba Shah ◽  
Naimat Ullah ◽  
Hazrat Hussain
Keyword(s):  
Sol Gel ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Cadmium Oxide ◽  
Visible Region ◽  
Solar Spectrum ◽  
Energy Dispersive ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Cdo Nanoparticles

Abstract Cadmium oxide nanoparticles (NPs) were successfully synthesized through the simple and low-cost sol–gel method. The optical, morphological, compositional, and structural properties of as-synthesized NPs were investigated by ultraviolet–visible (UV/Vis) spectroscopy, fluorescence spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) analysis. Absorption spectra of CdO NPs were used for band gaps calculation, which was found to be 2.11 eV. The XRD pattern was used to investigate the purity and crystalline nature of NPs. Morphology and elemental composition were investigated by using SEM and energy-dispersive X-ray spectroscopy (EDX), respectively. FTIR assisted in identifying the functional groups and grafting of the dye on the surface of NPs. These CdO nanoparticles were photosensitized with Ru (II) based Z907 dye. Z907 dye was employed to extend the absorption spectrum of the material to the visible region of the solar spectrum so as to harvest the maximum amount of solar influx on the surface of earth. The energy level diagram revealed that the interaction among the constituents of the nanohybrid assembly permitted the flow of the electron in a cascade manner from dye to CdO nanoparticles. The synthesized photoactive nanohybrid material was thoroughly blended with poly (3-hexylthiophene), a solid electrolyte, and I–V measurements under simulated radiations 1000 W/m2 (AM 1.5) were recorded. A maximum induced photon to the current conversion efficiency of 0.60% was achieved.

scholarly journals Study of the Painting Methods of Mural Paintings in Ancient Tombs of Goguryeo Using Scanning Electron Microscope

2013 ◽  
Vol 19 (S5) ◽  
pp. 157-161 ◽  
Author(s):  
Kyeongsoon Han ◽  
Sangjin Lee ◽  
Hwasoo Lee
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Energy Dispersive ◽  
Elemental Mapping ◽  
The West ◽  
X Ray ◽  
Mural Paintings ◽  
Scanning Electron

AbstractDisputes on the painting methods of Goguryeo murals can mainly be categorized into whether the murals adapted eastern secco or western fresco; however, the murals have their own unique methods as well. There are different viewpoints among experts on interpreting the painting methods. This study involved the creation of research samples to discover the painting methods under dispute and may help discover the methods based on scanning electron microscopy energy-dispersive X-ray spectroscopy (SEM-EDX) studies. Goguryeo murals introduced pseudo-fresco rather than buon fresco methods. Unlike fresco techniques in the West, Goguryeo painters mixed traditional soft binders and adapted typical secco painting techniques for paintings, borders, and corrections after drying. The disputed issues may be resolved by these techniques, and samples may be produced based on the analyzed data. Therefore, many questions can finally be answered through SEM-EDX elemental mapping.

Studies on conducting nanocomposite with gallium nitride–doped ferrite, part – I

2016 ◽  
Vol 231 (1) ◽  
pp. 43-52 ◽  
Author(s):  
Rajani Indrakanti ◽  
V Brahmaji Rao ◽  
C Udaya Kiran
Keyword(s):  
Electron Microscope ◽  
Magnetic Measurements ◽  
Sol Gel ◽  
Ferromagnetic State ◽  
Energy Dispersive ◽  
Particle Sizes ◽  
X Ray Diffraction ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Scherrer Formula

This article presents the synthesis and the structural, morphological, magnetic and spectroscopic characterisations of GaN-doped Fe2O3 nanoparticles prepared by the sol–gel method. The ‘Sci find’ software was unable to trace any of the references to point out the earlier knowledge and existence of this novel compound in the literature. We claim our contribution for the same. The structural analysis is done using the X-ray diffraction and energy-dispersive X-ray analysis, while the morphological analysis is done by the scanning electron microscope and the transmission electron microscope. The samples show a simple cubic crystalline structure. The morphological and energy-dispersive X-ray analysis and the infrared studies confirm the composition of the material and the particle sizes of the samples are found to be in the range of 9–27 nm (for x = 0.5) and 23–30 nm (for x = 0.75). The particle sizes, obtained from the histogram evaluations, the Debye–Scherrer formula in X-ray diffraction and the selected area electron diffraction measurements are all in good agreement. The room temperature magnetic measurements obtained using the vibration sample magnetometer for x = 0.5, 0.75,1 and 5 are presented as the hysteresis curves and their related plots. The discussion about the conclusions drawn therein infers that the coercivity increases with the concentration. The compound exhibits spinel structure and vivid changes from the super paramagnetic to the ferromagnetic state.

scholarly journals Analysis of Ionic-Exchange of Selected Elements between Novel Nano-Hydroxyapatite-Silica Added Glass Ionomer Cement and Natural Teeth

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3504
Author(s):  
Imran Alam Moheet ◽  
Norhayati Luddin ◽  
Ismail Ab Rahman ◽  
Sam’an Malik Masudi ◽  
Thirumulu Ponnuraj Kannan ◽  
...  
Keyword(s):  
Sol Gel ◽  
Glass Ionomer Cement ◽  
Energy Dispersive ◽  
Elemental Distribution ◽  
Ionic Exchange ◽  
One Pot ◽  
X Ray ◽  
Tooth Structure ◽  
Edx Analysis ◽  
Natural Teeth

One of the foremost missions in restorative dentistry is to discover a suitable material that can substitute lost and damaged tooth structure. To this date, most of the restorative materials utilized in dentistry are bio-inert. It is predicted that the addition of nano-HA-SiO2 to GIC matrix could produce a material with better ion-exchange between the restorative material and natural teeth. Therefore, the aim of the current study was to synthesize and investigate the transfer of specific elements (calcium, phosphorus, fluoride, silica, strontium, and alumina) between nano-hydroxyapatite-silica added GIC (nano-HA-SiO2-GIC) and human enamel and dentine. The novel nano-hydroxyapatite-silica (nano-HA-SiO2) was synthesized using one-pot sol-gel method and added to cGIC. Semi-quantitative energy dispersive X-ray (EDX) analysis was carried out to determine the elemental distribution of fluorine, silicon, phosphorus, calcium, strontium, and aluminum. Semi-quantitative energy dispersive X-ray (EDX) analysis was performed by collecting line-scans and dot-scans. The results of the current study seem to confirm the ionic exchange between nano-HA-SiO2-GIC and natural teeth, leading to the conclusion that increased remineralization may be possible with nano-HA-SiO2-GIC as compared to cGIC (Fuji IX).

scholarly journals Porpitids (Cnidaria: Hydrozoa) from the early Cambrian (Series 2: Stage 4) of Nevada, U.S.A.

2017 ◽  
Author(s):  
Bruce S Lieberman ◽  
Richard Kurkewicz ◽  
Heather Shinogle
Keyword(s):  
Iron Sulfide ◽  
Energy Dispersive ◽  
Early Cambrian ◽  
Elemental Mapping ◽  
X Ray ◽  
Element Carbon ◽  
Stage 4 ◽  
The Status

The morphology and affinities of newly discovered soft-bodied fossils from the early Cambrian (Series 2: Stage 4, Dyeran) Carrara Formation that resemble modern and fossil porpitids are discussed. These specimens show substantial similarity to the Ordovician porpitid Discophyllum peltatum Hall, 1847. The status of various Proterozoic and Phanerozoic taxa previously referred to porpitids is also briefly considered. To verify that the specimens were not dubio- or pseudofossils, elemental mapping using energy dispersive X-ray spectroscopy (EDS) was conducted. This indicated that the fossils were not hematite, iron sulfide, pyrolusite, or other abiologic mineral precipitates. Instead, their status as biologic structures and thus actual fossils is supported. Enrichment in the element carbon, and also possibly to some extent the elements magnesium and iron, seems to be playing some role in the preservation process.

Nonuniform functional group distribution of carbon nanotubes studied by energy dispersive X-ray spectrometry imaging in SEM

Nanoscale ◽  
2019 ◽  
Vol 11 (44) ◽  
pp. 21487-21492 ◽  
Author(s):  
Hideaki Nakajima ◽  
Takahiro Morimoto ◽  
Ying Zhou ◽  
Kazufumi Kobashi ◽  
Seisuke Ata ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Spatial Resolution ◽  
Functional Group ◽  
High Spatial Resolution ◽  
Energy Dispersive ◽  
Elemental Mapping ◽  
X Ray ◽  
Group Distribution

Light elemental mapping with a high spatial resolution of <10 nm is successfully conducted by the advanced SEM–EDS technique.

scholarly journals Sulfur/Gadolinium-Codoped TiO2Nanoparticles for Enhanced Visible-Light Photocatalytic Performance

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Eric S. Agorku ◽  
Bhekie B. Mamba ◽  
Avinash C. Pandey ◽  
Ajay K. Mishra
Keyword(s):  
Electron Microscopy ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Diffuse Reflectance Spectroscopy ◽  
Anatase Phase ◽  
Sol Gel ◽  
Indigo Carmine ◽  
Great Influence ◽  
Energy Dispersive ◽  
X Ray

A series of S/Gd3+-codoped TiO2photocatalysts were synthesized by a modified sol-gel method. The materials were characterized by X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), UV-visible diffuse reflectance spectroscopy, scanning electron microscopy (SEM)/energy-dispersive X-ray spectroscopy (EDX), and transmission electron microscopy (TEM)/energy-dispersive spectroscopy (EDS). Laboratory experiments with Indigo Carmine chosen as a model for organic pollutants were used to evaluate the photocatalytic performance of S/Gd3+-codoped TiO2under visible-light with varying concentrations of Gd3+ions in the host material. XRD and Raman results confirmed the existence of anatase phase TiO2with particle size ranging from 5 to 12 nm. Codoping has exerted a great influence on the optical responses along with red shift in the absorption edge. S/Gd3+-codoped TiO2showed significant visible-light induced photocatalytic activity towards Indigo Carmine dye compared with S-TiO2or commercial TiO2. TiO2-S/Gd3+(0.6% Gd3+) degraded the dye (ka= 5.6 × 10−2 min−1) completely in 50 min.

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