scholarly journals SIMULTANEOUS THERMAL ANALYSIS AND RAMAN SPECTROSCOPY AS COMPLEMENTARY METHODS OF DIAGNOSTICS OF CARBON ALLOTROPIC FORMS

2018 ◽  
Vol 59 (8) ◽  
pp. 34
Author(s):  
Irina A. Khabibullina ◽  
Nikolai N. Sitnikov ◽  
Valery A. Kazakov ◽  
Sergeiy K. Sigalaev
Keyword(s):  
Thermal Analysis ◽  
Raman Spectroscopy ◽  
Complex Analysis ◽  
Simultaneous Thermal Analysis ◽  
Synchronous Thermal Analysis ◽  
Complementary Methods ◽  
Carbon Structures ◽  
Forms Of Carbon

Work is devoted to detection of distinctive characteristics of allotropic forms of carbon which would provide their identification from mixes. The complex analysis is offered by methods: the synchronous thermal analysis with studying of composition of the emitted gases and Raman spectroscopy. It was shown that researches of carbon structures and their mixes by the declared methods agree well and complement each other.

scholarly journals Metamorphic graphite from Szendrőlád (Szendrő Mts., NE-Hungary) detected by simultaneous DTA-TG

2021 ◽  
Author(s):  
Lívia Majoros ◽  
Krisztián Fintor ◽  
Tamás Koós ◽  
Sándor Szakáll ◽  
Ferenc Kristály
Keyword(s):  
Thermal Analysis ◽  
Raman Spectroscopy ◽  
Powder Diffraction ◽  
Automobile Industry ◽  
Raw Materials ◽  
Regional Metamorphism ◽  
High Tech ◽  
Raman Spectrometry ◽  
X Ray ◽  
Forms Of Carbon

AbstractGraphite, one of the polymorphic forms of carbon, has become a versatile industrial material of nowadays due to its particular attributes. It is used mainly in the automobile industry, metal extractive industry and in the high-tech industry. Moreover, it is also included in the list of critical raw materials for the EU. Our aim was to prove the presence of graphite by thermal analysis beyond X-ray powder diffraction (XRD) and Raman spectroscopy. Thermogravimetry yields comparable results with quantitative XRD. The formation conditions are described by Raman spectrometry and microscopy examinations of drill core samples from Szendrőlád (Szendrő Mts, NE-Hungary; (Szendrőlád Limestone Formation, middle-late Devonian, shelf-basin facies). Polished rock slabs were made for optical microscopy, scanning electron microscopy with energy dispersive spectrometry (SEM–EDS) and Raman spectroscopy. X-ray powder diffraction (XRD) and thermal analysis (DTA-TG) measurements were made on powders. Based on our results, the graphite is epigenetic; its quantity varies between 1.5–3 mass% in the samples. It was developed in 20–50 μm sized flakes, which are often arranged in > 300 μm sized aggregates. Graphite was formed during regional metamorphism from the organic matter-rich shales. The average formation temperature, calculated from the results of Raman spectroscopy, is around 410 °C (± 30 °C). The Raman measurements also indicated the presence of a partially graphitized (disordered graphite) material beside graphite.

Insitu Raman spectroscopy and thermal analysis of the formation of nitrogen-doped graphene from urea and graphite oxide

RSC Advances ◽  
2013 ◽  
Vol 3 (44) ◽  
pp. 21763 ◽  
Author(s):  
Michael Mowry ◽  
Dennis Palaniuk ◽  
Claudia C. Luhrs ◽  
Sebastian Osswald
Keyword(s):  
Thermal Analysis ◽  
Raman Spectroscopy ◽  
Graphite Oxide ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Development of the simultaneous thermal analysis/X-ray scattering measurement system

1995 ◽  
Vol 264 ◽  
pp. 173-183 ◽  
Author(s):  
Hirohisa Yoshida ◽  
Ryoichi Kinoshita ◽  
Yoshihiko Teramoto
Keyword(s):  
Thermal Analysis ◽  
Measurement System ◽  
Simultaneous Thermal Analysis ◽  
X Ray ◽  
X Ray Scattering ◽  
Scattering Measurement ◽  
Ray Scattering

scholarly journals Carbon Nanotube Peapods Under High-Strain Rate Conditions: A Molecular Dynamics Investigation

MRS Advances ◽  
2020 ◽  
Vol 5 (33-34) ◽  
pp. 1723-1730
Author(s):  
J. M. De Sousa ◽  
C. F. Woellner ◽  
L. D. Machado ◽  
P. A. S. Autreto ◽  
D. S. Galvao
Keyword(s):  
Molecular Dynamics ◽  
Carbon Nanotube ◽  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Optical Modulation ◽  
Carbon Structures ◽  
Dynamics Simulations ◽  
Forms Of Carbon ◽  
The Impact

ABSTRACTNew forms of carbon-based materials have received great attention, and the developed materials have found many applications in nanotechnology. Interesting novel carbon structures include the carbon peapods, which are comprised of fullerenes encapsulated within carbon nanotubes. Peapod-like nanostructures have been successfully synthesized, and have been used in optical modulation devices, transistors, solar cells, and in other devices. However, the mechanical properties of these structures are not completely elucidated. In this work, we investigated, using fully atomistic molecular dynamics simulations, the deformation of carbon peapods under high-strain rate conditions, which are achieved by shooting the peapods at ultrasonic velocities against a rigid substrate. Our results show that carbon peapods experience large deformation at impact, and undergo multiple fracture pathways, depending primarily on the relative orientation between the peapod and the substrate, and the impact velocity. Observed outcomes include fullerene ejection, carbon nanotube fracture, fullerene, and nanotube coalescence, as well as the formation of amorphous carbon structures.

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