scholarly journals Silver Chloride Encapsulation-Induced Modifications of Raman Modes of Metallicity-Sorted Semiconducting Single-Walled Carbon Nanotubes

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
M. V. Kharlamova ◽  
C. Kramberger ◽  
A. Mittelberger ◽  
K. Yanagi ◽  
T. Pichler ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Silver Chloride ◽  
Single Walled Carbon Nanotubes ◽  
Radial Breathing Mode ◽  
Resonance Excitation ◽  
Single Walled Carbon ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Raman Modes ◽  
Walled Carbon Nanotubes

The internal channels of semiconducting single-walled carbon nanotubes (SWCNTs) were filled with silver chloride. The filling was confirmed by high-resolution scanning transmission electron microscopy. The filling-induced modifications of Raman modes of SWCNTs were analyzed. The fitting of the radial breathing mode (RBM) and G-bands of Raman spectra of the pristine and filled nanotubes with individual components allowed analyzing in detail the influence of encapsulated silver chloride on the electronic properties of different diameter nanotubes. The analysis of the RBM-band allowed revealing the changes in resonance excitation conditions of SWCNTs upon filling. The analysis of the G-band allowed concluding about p-doping of nanotubes by incorporated silver chloride accompanied by charge transfer from nanotubes to the inserted salt.

scholarly journals Endohedral Functionalization of Metallicity-Sorted Single-Walled Carbon Nanotubes

Proceedings ◽  
2020 ◽  
Vol 56 (1) ◽  
pp. 33
Author(s):  
Marianna V. Kharlamova ◽  
Christian Kramberger ◽  
Oleg Domanov ◽  
Andreas Mittelberger ◽  
Kazuhiro Yanagi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Photoelectron Spectroscopy ◽  
Scanning Transmission Electron Microscopy ◽  
Silver Chloride ◽  
Single Walled Carbon Nanotubes ◽  
Spectroscopic Techniques ◽  
Single Walled Carbon ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Walled Carbon Nanotubes

We performed endohedral functionalization of high-purity metallicity-sorted semiconducting and metallic single-walled carbon nanotubes (SWCNTs) with a mean diameter of 1.4 nm with silver chloride (AgCl) by the method of capillary filling with the melt. The AgCl-filled SWCNTs were investigated by high-resolution scanning transmission electron microscopy and spectroscopic techniques, such as Raman spectroscopy, X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy, which were combined to study comprehensively the modified electronic properties of the filled SWCNTs. The data revealed a downshift of the Fermi level of the nanotubes upon filling, i.e., a p-doping of SWCNTs.

Structural Analysis of Encapsulated Single-Walled Carbon Nanotubes

2015 ◽  
Vol 2 (2) ◽  
Author(s):  
D. B. Singh ◽  
V. N. Shukla ◽  
Vikas Kumar ◽  
Pragya Gupta ◽  
L. Ramma
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Properties ◽  
Single Walled Carbon Nanotubes ◽  
Radial Breathing Mode ◽  
Peak Position ◽  
Light Illumination ◽  
Single Walled Carbon ◽  
Raman Modes ◽  
Tip Enhanced Raman Spectroscopy ◽  
Walled Carbon Nanotubes

Tip-enhanced Raman spectroscopy revealed the nanoscale chemical properties of organic molecules encapsulated in single walled carbon nanotubes (SWNTs). Our approach is based on an enhanced electric field near a laser-irradiated metal tip functioning as a Raman excitation source. The enhanced field can successfully act on encapsulated molecules through the walls of the SWNTs to extract molecular vibrational information -carotene, which exhibits several active Raman modes under visible light illumination, was used as the encapsulated molecule. Tip-enhanced Raman spectra measured at seven different positions on SWNT bundles showed that carotene molecules inside the tubes were not uniformly distributed. It is also found that the filling rate and peak position of the radial breathing mode of the SWNTs are linearly correlated.

scholarly journals Raman Spectroscopy Study of the Doping Effect of the Encapsulated Iron, Cobalt, and Nickel Bromides on Single-Walled Carbon Nanotubes

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Marianna V. Kharlamova
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Single Walled Carbon Nanotubes ◽  
Radial Breathing Mode ◽  
Doping Effect ◽  
Single Walled Carbon ◽  
Iron Bromide ◽  
Raman Modes ◽  
Walled Carbon Nanotubes ◽  
Cobalt And Nickel

In this contribution the modification of the electronic properties of single-walled carbon nanotubes (SWCNTs) filled with nickel bromide, cobalt bromide, and iron bromide was studied by Raman spectroscopy. The doping-induced alterations of the radial breathing mode (RBM) and G-mode in the Raman spectra of the filled SWCNTs were analyzed in detail. The observed shifts of the components of the Raman modes and changes of their profiles allowed concluding that the embedded compounds have an acceptor doping effect on the SWCNTs, and the doping level increases in the line with nickel bromide-cobalt bromide-iron bromide.

Metal Coated Functionalized Single-Walled Carbon Nanotubes for Composites Application

2007 ◽  
Vol 561-565 ◽  
pp. 655-658 ◽  
Author(s):  
Qiang Zeng ◽  
Jennifer Luna ◽  
Y. Bayazitoglu ◽  
Kenneth Wilson ◽  
M. Ashraf Imam ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Metal Composite ◽  
X Ray ◽  
Single Walled Carbon ◽  
Transmission Electron ◽  
Nucleation Sites ◽  
Metal Composite Materials ◽  
Walled Carbon Nanotubes

This study is considered as a method for producing multifunctional metal composite materials by using Single-walled Carbon Nanotubes (SWNTs). In this research, various metals (Ni, Cu, Ag ) were successfully deposited onto the surface of SWNTs. It has been found that homogenous dispersion and dense nucleation sites are the necessary conditions to form uniform coating on SWNTs. Functionalization has been applied to achieve considerable improvement in the dispersion of purified single-walled carbon nanotubes. A three-step electroless plating approach was used and the coating mechanism is described in the paper. The samples were characterized by using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, and energy-dispersive X-ray spectroscopy (EDX). The application of coated SWNTs in Titanium will be discussed in this paper.

scholarly journals Raman Modes of Index-Identified Freestanding Single-Walled Carbon Nanotubes

2005 ◽  
Vol 95 (21) ◽  
Author(s):  
Jannik C. Meyer ◽  
Matthieu Paillet ◽  
Thierry Michel ◽  
Alain Moréac ◽  
Anita Neumann ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Raman Modes ◽  
Walled Carbon Nanotubes

Image Restoration of One-Dimensional HgTe Crystals Formed within Single Walled Carbon Nanotubes

2006 ◽  
Vol 514-516 ◽  
pp. 1131-1134
Author(s):  
Jeremy Sloan ◽  
Robin Carter ◽  
Angus I. Kirkland ◽  
Rüdiger R. Meyer ◽  
Alexis Vlandas ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Three Dimensional ◽  
Single Walled Carbon Nanotubes ◽  
One Dimensional ◽  
Single Walled Carbon ◽  
Semiconductor Crystals ◽  
Transmission Electron ◽  
Walled Carbon Nanotubes ◽  
Separate Crystal

Restored high resolution transmission electron microscopy (HRTEM) images have been recorded from 1D semiconductor crystals formed within narrow diameter (ca. 1.4 nm) single walled carbon nanotubes (SWNTs). Two unique projections were obtained from separate crystal fragments encapsulated within separate nanotubes that has facilitated the reconstruction of the three dimensional arrangement of atoms within the two encapsulated fragments.

Probing factors affecting the Raman modes and structural collapse of single-walled carbon nanotubes under pressure

2013 ◽  
Vol 250 (7) ◽  
pp. 1370-1375 ◽  
Author(s):  
Mingguang Yao ◽  
Shuangchen Lu ◽  
Junping Xiao ◽  
Zhen Yao ◽  
Linhai Jiang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Structural Collapse ◽  
Factors Affecting ◽  
Single Walled Carbon ◽  
Raman Modes ◽  
Walled Carbon Nanotubes
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