scholarly journals Thermal Investigations on Carbon Nanotubes by Spectroscopic Techniques

2020 ◽  
Vol 10 (22) ◽  
pp. 8159
Author(s):  
Maria Teresa Caccamo ◽  
Giuseppe Mavilia ◽  
Salvatore Magazù
Keyword(s):  
Carbon Nanotubes ◽  
Inflection Point ◽  
Cross Correlation ◽  
Spectroscopic Techniques ◽  
Spectral Distance ◽  
Relaxation Temperature ◽  
Thermal Investigations ◽  
Infrared And Raman Spectroscopy ◽  
Energy Storage Applications ◽  
Technical Features

Carbon nanotubes (CNTs) thanks to their unique physical properties have been employed in several innovative applications particularly for energy storage applications. Certain technical features of carbon nanotubes, such as their remarkable specific surface, mechanical strength, as well as their electron and thermal conductivity are suitable for these applications. Furthermore, in order to produce a device, thermal treatment is needed and for this reason the trend of thermal decomposition of the tubes plays a key role in the integration process. The main purpose of this work was to characterize the thermal behavior of CNTs. In particular, we show the findings of an experimental study on CNTs performed by means of Fourier Transform InfraRed and Raman spectroscopy investigations. The collected FTIR and Raman spectra were analyzed by using two innovative procedures: spectral distance (SD) and wavelet cross correlation (XWT). From both analyses, a relaxation temperature value emerged of T = 206 °C, corresponding to a relaxation inflection point. Such a system relaxation phenomenon, occurring in the fiber CNTs, could be connected with the decay of the mechanical properties due to a decrease in the alignment and compaction of the fibers.

scholarly journals Synthesis, Structural and Optical Investigations of (Pb, Bi)TiO3 Borosilicate Glasses

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Chandkiram Gautam
Keyword(s):  
Spectroscopic Techniques ◽  
Borosilicate Glasses ◽  
X Ray Diffraction ◽  
Raman Spectroscopic ◽  
Spectral Bands ◽  
Prepared Glass ◽  
Infrared And Raman Spectroscopy ◽  
Uv Visible ◽  
Diffraction Patterns ◽  
Spectral Patterns

A new series of lead bismuth titanate borosilicate glasses with addition of one percent lanthanum oxide have been synthesized using melt-quench technique. X-ray diffraction patterns have been recorded to confirm the amorphous nature of the prepared glass samples. The synthesized glasses have been characterized by using various spectroscopic techniques such as UV-visible, infrared, and Raman spectroscopy. UV-visible measurements were recorded in the wavelength range from 200 to 1100 nm whereas IR and Raman spectroscopic measurements were recorded over a continuous wavenumber range from 400 to 5000 cm−1 and 1000 to 2000 cm−1 respectively. The different absorption peaks/bands were formed in IR spectral patterns. The spectral bands appear towards the lower wavenumber sides due to the Bi and Pb, content while the bands appear towards the higher wavenumber sides due to the formation of diborate and triborate network units.

Functionalized carbon nanotubes and graphene-based materials for energy storage

2016 ◽  
Vol 52 (100) ◽  
pp. 14350-14360 ◽  
Author(s):  
Bin Wang ◽  
Chuangang Hu ◽  
Liming Dai
Keyword(s):  
Carbon Nanotubes ◽  
Energy Storage ◽  
Recent Progress ◽  
Functionalized Carbon Nanotubes ◽  
Feature Article ◽  
Energy Storage Applications ◽  
Functionalization Of Carbon Nanotubes

This feature article summarizes recent progress in the functionalization of carbon nanotubes and graphene for energy storage applications in supercapacitors and batteries.

Metal nanoparticles, nanowires, and carbon nanotubes

2000 ◽  
Vol 72 (1-2) ◽  
pp. 21-33 ◽  
Author(s):  
C. N. R. Rao ◽  
G. U. Kulkarni ◽  
A. Govindaraj ◽  
B. C. Satishkumar ◽  
P. John Thomas
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Metal Nanoparticles ◽  
Spectroscopic Techniques ◽  
Single Walled Nanotubes ◽  
Size Dependent ◽  
Nanotube Bundles ◽  
2D And 3D ◽  
Nonmetal Transition

The size-dependent metal to nonmetal transition in metal nanoparticles has been investigated using photoelectron and tunneling spectroscopic techniques. Metal nanoparticles capped by thiols are shown to organize into ordered 2D and 3D structures. Single-walled nanotubes and aligned carbon nanotube bundles have been synthesized by controlling the size of metal nanoparticles produced in situ during the pyrolysis of precursors. Nanowires of gold and other metals have been produced in the capillaries of the single-walled nanotubes.

Nano-sized lithium manganese oxide dispersed on carbon nanotubes for energy storage applications

2009 ◽  
Vol 11 (8) ◽  
pp. 1575-1578 ◽  
Author(s):  
Sang-Bok Ma ◽  
Kyung-Wan Nam ◽  
Won-Sub Yoon ◽  
Seong-Min Bak ◽  
Xiao-Qing Yang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Energy Storage ◽  
Manganese Oxide ◽  
Lithium Manganese Oxide ◽  
Lithium Manganese ◽  
Energy Storage Applications

scholarly journals Segmental and site specific isotope labelling strategies for structural analysis of posttranslationally modified proteins

2021 ◽  
Author(s):  
Dominik P Vogl ◽  
Anne C. Conibear ◽  
Christian F.W. Becker
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Raman Spectroscopy ◽  
Structural Analysis ◽  
Posttranslational Modifications ◽  
Protein Structures ◽  
Spectroscopic Techniques ◽  
Site Specific ◽  
Isotope Labelling ◽  
Infrared And Raman Spectroscopy ◽  
Modified Proteins

Posttranslational modifications can alter protein structures, functions and localisation, and are important cellular regulatory and signalling mechanisms. Spectroscopic techniques such as nuclear magnetic resonance, infrared, and Raman spectroscopy, as well...

Functionalization of single-walled carbon nanotubes: Chemistry and characterization

2017 ◽  
Author(s):  
R. Graupner ◽  
F. Hauke
Keyword(s):  
Carbon Nanotubes ◽  
Nir Spectroscopy ◽  
Single Walled Carbon Nanotubes ◽  
Covalent Attachment ◽  
Spectroscopic Techniques ◽  
Force Microscopy ◽  
Single Walled Carbon ◽  
Transmission Electron ◽  
Tunnelling Microscopy ◽  
Walled Carbon Nanotubes

This article examines the chemical functionalization and structural alteration of single-walled carbon nanotubes (SWCNTs). It describes the covalent functionalization of the SWCNT framework that is the covalent attachment of functional entities onto the CNT scaffold. In particular, it considers the chemical modification and reactivity of SWCNTs in the context of the reactivity of graphite and fullerenes. It also discusses the defect and sidewall functionalization of SWCNTs, along with various techniques used in the characterization ofSWCNTs upon functionalization, namely: thermogravimetric analysis, spectroscopic techniques such as UV-Vis-NIR spectroscopy and Raman spectroscopy, and microscopic techniques like transmission electron microscopy, atomic force microscopy and scanning tunnelling microscopy.

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