scholarly journals Protective Coatings Based on PMMA–Silica Nanocomposites Reinforced with Carbon Nanotubes

10.5772/62808 ◽  
2016 ◽  
Author(s):  
Samarah V. Harb ◽  
Fábio C. dos Santos ◽  
Sandra H. Pulcinelli ◽  
Celso V. Santilli ◽  
Kevin M. Knowles ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Protective Coatings ◽  
Silica Nanocomposites

Metal-catalyst-free access to multiwalled carbon nanotubes/silica nanocomposites (MWCNT/SiO2) from a single-source precursor

2019 ◽  
Vol 48 (29) ◽  
pp. 11018-11033 ◽  
Author(s):  
Gabriela Mera ◽  
Peter Kroll ◽  
Ilia Ponomarev ◽  
Jiewei Chen ◽  
Koji Morita ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Silica Matrix ◽  
Metal Catalyst ◽  
Free Access ◽  
Single Source ◽  
Simple Metal ◽  
Multiwalled Carbon ◽  
Silica Nanocomposites ◽  
Catalyst Free ◽  
Single Source Precursor

Bamboo-like MWCNTs in a mesoporous silica matrix are synthesized by a simple metal-catalyst-free single-source precursor approach.

Vertically Aligned Carbon Nanotubes as the Sputter Resist in Space Propulsive Systems

2004 ◽  
Vol 851 ◽  
Author(s):  
Yoke Khin Yap ◽  
Vijaya Kayastha ◽  
Jitendra Menda ◽  
Lakshman Kumar Vanga ◽  
Jiesheng Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electric Propulsion ◽  
Protective Coatings ◽  
Erosion Mechanism ◽  
Erosion Rates ◽  
Aligned Carbon Nanotubes ◽  
Multi Walled Carbon Nanotubes ◽  
Vertically Aligned ◽  
Series Of Experiments ◽  
Walled Carbon Nanotubes

ABSTRACTTwo-types of vertically aligned multi-walled carbon nanotubes (VA-MWNTs) are evaluated as the protective coatings against ion erosion in electric propulsion systems. A series of experiments have been conducted to understand the erosion rate and erosion mechanism of these VA-MWNTs. These experiments were carried out with Xe propellant at an ion current density of 5 mA/cm2. We found that the erosion rates of both types of VA-MWNTs were changing with time. Such a nonlinear erosion process is explained according to a possible erosion mechanism.

Structural phenomena in the growth of carbon nanotubes

1993 ◽  
Vol 51 ◽  
pp. 750-751
Author(s):  
Jun Jiao
Keyword(s):  
Carbon Nanotubes ◽  
Growth Mechanism ◽  
Carbonaceous Material ◽  
Cluster Growth ◽  
Structural Elements ◽  
Rich Variety ◽  
Different Shapes ◽  
Point To Point

HREM studies of the carbonaceous material deposited on the cathode of a Huffman-Krätschmer arc reactor have shown a rich variety of multiple-walled nano-clusters of different shapes and forms. The preparation of the samples, as well as the variety of cluster shapes, including triangular, rhombohedral and pentagonal projections, are described elsewhere.The close registry imposed on the nanotubes, focuses attention on the cluster growth mechanism. The strict parallelism in the graphitic separation of the tube walls is maintained through changes of form and size, often leading to 180° turns, and accommodating neighboring clusters and defects. Iijima et. al. have proposed a growth scheme in terms of pentagonal and heptagonal defects and their combinations in a hexagonal graphitic matrix, the first bending the surface inward, and the second outward. We report here HREM observations that support Iijima’s suggestions, and add some new features that refine the interpretation of the growth mechanism. The structural elements of our observations are briefly summarized in the following four micrographs, taken in a Hitachi H-8100 TEM operating at an accelerating voltage of 200 kV and with a point-to-point resolution of 0.20 nm.

Carbon nanotubes: Twist 'n' roll

Nature China ◽  
2007 ◽  
Author(s):  
Rachel Pei Chin Won
Keyword(s):  
Carbon Nanotubes
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