Study of the packing of double-walled carbon nanotubes into bundles by transmission electron microscopy and electron diffraction

2004 ◽  
Vol 14 (4) ◽  
pp. 603 ◽  
Author(s):  
Jean-Fran�ois Colomer ◽  
Luc Henrard ◽  
Gustaaf Van Tendeloo ◽  
Amand Lucas ◽  
Philippe Lambin
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Transmission Electron Microscopy ◽  
Electron Diffraction ◽  
Transmission Electron ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Coupled Vibrations in Index-Identified Carbon Nanotubes

2014 ◽  
Vol 1700 ◽  
pp. 69-77 ◽  
Author(s):  
Dmitry Levshov ◽  
Thierry Michel ◽  
Matthieu Paillet ◽  
Xuan Tinh Than ◽  
Huy Nam Tran ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
High Resolution ◽  
Electron Diffraction ◽  
Electron Spectroscopy ◽  
Free Standing ◽  
Transmission Electron ◽  
Resonant Raman ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

ABSTRACTCombining high resolution transmission electron spectroscopy, electron diffraction, and resonant Raman spectroscopy experiments on the same suspended (free-standing) individual carbon nanotubes is the ultimate approach to relate unambiguously the structure and the intrinsic phonon features of these nano-systems.By using this approach, the effect of coupling between nanotubes on the phonons is investigated in two model nano-systems: (i) a bundle of two non-identical SWNTs (inhomogeneous dimer), (ii) double-walled carbon nanotubes.

scholarly journals Encapsulated Molecules in Carbon Nanotubes: Structure and Properties

2001 ◽  
Vol 675 ◽  
Author(s):  
Richard Russo ◽  
Brian W. Smith ◽  
B.C. Satishkumar ◽  
David E. Luzzi ◽  
Harry C. Dorn
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Thermal Stability ◽  
Transmission Electron Microscopy ◽  
Single Walled Carbon Nanotubes ◽  
Structure And Properties ◽  
One Dimensional ◽  
Transmission Electron ◽  
Walled Carbon Nanotubes ◽  
Thermal Stability Of

ABSTRACTWe encapsulate a number of fullerenes inside single-walled carbon nanotubes (SWNTs) including La2@C80 and ErxSc3–xN@C80(x=0–3). The structural properties of these nanoscopic hybrid materials are described using high resolution transmission electron microscopy and electron diffraction. It is found that the encapsulated fullerenes self-assemble into long, one-dimensional chains. The thermal stability of these supramolecular assemblies are studied and large variations are found. The behavior is nominally consistent with the mass of the encapsulated metallofullerenes.

Fabrication of a vertically aligned carbon nanotube electrode and its modification by nanostructured MnO2 for supercapacitors

2009 ◽  
Vol 81 (12) ◽  
pp. 2317-2325 ◽  
Author(s):  
Wei-De Zhang ◽  
Jin Chen
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Room Temperature ◽  
Transmission Electron ◽  
Multi Walled Carbon Nanotubes ◽  
Vertically Aligned ◽  
Walled Carbon Nanotubes ◽  
Scanning Electron

Strongly bonded arrays of vertically aligned, multi-walled carbon nanotubes (MWNTs) have been successfully grown on Ta foils, and provide a convenient basis for fabricating electrodes with high conductivity and stability. The MWNT arrays were further coated by nanostructured MnO2 through reacting with KMnO4 solution at room temperature. The morphology of the MnO2/MWNT nanocomposite was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was found that the MnO2 is a beehive-like nanostructure that is homogeneously and densely coated on the surface of the MWNTs. The capacitance of the MWNT electrode was significantly increased from 0.14 to 6.81 mF cm–2 after being modified with nanostructured MnO2, that is, the mass-specific capacitance of the bare and MnO2-modified MWNTs was about 33 and 446 F g–1, respectively. The MnO2/MWNT nanocomposite on Ta foils could be potential for developing a supercapacitor.

Structural and morphological variations of encapsulated metal oxides in single walled carbon nanotubes

2005 ◽  
Vol 901 ◽  
Author(s):  
Pedro MFJ Costa ◽  
Narun Thamavaranukup ◽  
Thomas Rutherford ◽  
Steffi Friedrichs ◽  
Jeremy Sloan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Transmission Electron Microscopy ◽  
Metal Oxides ◽  
Morphological Characteristics ◽  
Single Walled Carbon Nanotubes ◽  
Morphological Variations ◽  
Single Walled Carbon ◽  
Transmission Electron ◽  
Walled Carbon Nanotubes

AbstractSingle walled carbon nanotubes have been filled with a variety of metal oxides and the structural and morphological characteristics of the metal_oxide@SWNT composites studied. Advanced techniques of software aberrations correction for transmission electron microscopy were used for characterisation. This research shows that, despite their higher reactivity compared to salts such as halides, oxides can be encapsulated within SWNTs with some compounds attaining remarkable filling yields.

Large Scale Combustion Synthesis of Single-Walled Carbon Nanotubes and Their Characterization

2008 ◽  
Vol 8 (11) ◽  
pp. 6065-6074 ◽  
Author(s):  
Henning Richter ◽  
Meri Treska ◽  
Jack B. Howard ◽  
John Z. Wen ◽  
Sebastien B. Thomasson ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Transmission Electron Microscopy ◽  
Combustion Synthesis ◽  
Large Scale ◽  
Single Walled Carbon Nanotubes ◽  
Process Conditions ◽  
Single Walled Carbon ◽  
Transmission Electron ◽  
Walled Carbon Nanotubes

Since its invention in 1991, premixed combustion synthesis of fullerenic materials has been established as the major industrial process for manufacturing of these materials. Large-scale production of fullerenes such as C60, C70 and C84 has been implemented. More recently, combustion technology has been extended to the targeted synthesis of single-walled carbon nanotubes (SWCNT). Addition of catalyst precursor and operation at well-controlled fuel-rich but non-sooting conditions are required. Extensive parametric studies have allowed for the optimization of the formation of high-quality SWCNT. Purification techniques previously reported in the literature have been adjusted and used successfully for the nearly complete removal of metal and metal oxide. Material has been characterized using Raman spectroscopy, scanning (SEM) and transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), atomic force microscopy (AFM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). Correlations between process conditions and nanotube properties such as length have been established. Product reproducibility and process scalability of the combustion process have been demonstrated. Sample preparation was found to affect significantly the apparent characteristics of nanotubes as seen in electron microscopy images.

Influence of Centrifugation Time and Force on Monodispersion of MWCNTs Aqueous Solution

2013 ◽  
Vol 365-366 ◽  
pp. 1122-1127
Author(s):  
Shao Wei Lu ◽  
Xian Jun Zeng ◽  
Peng Nie ◽  
Chun Xu Zhang
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Transmission Electron Microscopy ◽  
Zeta Potential ◽  
Standard Procedure ◽  
Transmission Electron ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Achieving the monodispersion of Multi-walled carbon nanotubes (MWCNTs) is a challenging work for CNTs application. Centrifugation as a standard procedure was employed to remove remaining large bundles and leaving primarily individual nanotubes and small bundles in the supernatant. The optimum centrifugation time and force were 30min and 12×103g, respectively , which were determined by UV-vis absorbance, transmission electron microscopy (TEM), Zeta potential and the residual MWCNTs concentration after centrifugation. Through centrifugation treatments, the uniform and stable MWCNTs monodispersion can be obtained and the Zeta potential was as high as-53.8mv after one month. The film formed from optimized MWCNTs monodispersed solution is smooth and flexible.

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