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Characterization of surfaces of carbon fibres by scanning tunneling microscopy
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TLDR
In this article, the experimental results obtained by scanning tunneling microscopy (STM) studies of different carbon fibres are presented and discussed, and a comparative analysis of the STM images at scales from hundreds of nanometers down to atomic scale reveals the differences of surface features for carbon fiber processed from different precursors, polyacrylonitrile fibres and pitch.Abstract:
The experimental results obtained by scanning tunneling microscopy (STM) studies of different carbon fibres are presented and discussed The comparative analysis of the STM images at scales from hundreds of nanometers down to atomic scale reveals the differences of surface features for carbon fibres processed from different precursors, polyacrylonitrile fibres and pitch The high temperature treatment of carbon fibres — the so-called graphitization process — as used to improve the stress modulus induces drastically increased ordering phenomena at the atomic level Structural information obtained by STM on the surface of the fibres as well as in their cross sectional areas is discussed in comparison with known results of diffraction studies STM appears to be the new powerfull technique for the detailed structural studies of surfaces of carbon fibres The perspectives of these studies are under discussionread more
Citations
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Journal ArticleDOI
Atomic force microscopy on polymers and polymer related compounds: 1. Cold-extruded polyethylene
TL;DR: In this paper, microscopic micrographs of PE reveal the fibrillar morphology of the uniaxially oriented material and the surface texture pattern shows chain overlapping as a result of the extrusion process.
Journal ArticleDOI
AFM, SEM and XPS characterization of PAN-based carbon fibres etched in oxygen plasmas
R. J. Smiley,W. N. Delgass +1 more
TL;DR: Investigation of changes in topography and surface chemical functionality on PAN-based carbon fibres exposed to low-temperature, lowpower, oxygen plasmas showed an initial increase in roughness with treatment, followed by a decrease to final values lower than those for untreated fibres.
Journal ArticleDOI
Ordered structures observed by scanning tunnelling microscopy at atomic scale on carbon black surfaces
J.B. Donnet,E. Custodero +1 more
TL;DR: In this paper, different reinforcing carbon blacks (ASTM grades N110, N234, N330, N990) have been studied and a remarkable reproducibility of images was obtained at large scale as at atomic resolution.
Journal ArticleDOI
Surface Characterization of Materials at Ambient Conditions by Scanning Tunneling Microscopy (STM) and Atomic Force Microscopy (AFM)
TL;DR: In this article, a review of the results of imaging transition metal chalcogenides and halides, conductive organic salts, and polymers are emphasized, with the separation of the contributions of the el...
Journal ArticleDOI
Study of carbon fiber surfaces by scanning tunnelling microscopy, part i. carbon fibers from different precursors and after various heat treatment temperatures
Jean-Baptiste Donnet,Ren-Yan Qin +1 more
TL;DR: In this paper, the authors applied scanning tunnelling microscopy (STM) to the study of the surfaces of carbon fibers and showed the difference in surface features and the structural discrepancies between carbon fibers from different precursors and after various heat treatments.
References
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Journal ArticleDOI
Scanning tunneling microscopy and atomic force microscopy: application to biology and technology
TL;DR: The scanning tunneling microscope (STM) and the atomic force microscope (AFM) are scanning probe microscopes capable of resolving surface detail down to the atomic level illustrated by atomic resolution images including graphite, an organic conductor, an insulating layered compound, and individual adsorbed oxygen atoms on a semiconductor.
Journal ArticleDOI
First-principles calculation of highly asymmetric structure in scanning-tunneling-microscopy images of graphite
TL;DR: The results show that no asymmetry is expected on surfaces of stage-1 AA stacked intercalated graphite, and the dependence of the asymmetry on the tip-to-surface separation has been evaluated using a tight-binding model for different bias voltages.
Journal ArticleDOI
Scanning tunneling microscopy on carbon fibers
Journal ArticleDOI
Tunneling microscopy on various carbon materials
V. Elings,Fred Wudl +1 more
TL;DR: In this paper, a new periodic structure was found on graphite whose size was ∼240 A on a side and whose height was 7 A. The structure is made of an integral number of surface waves whose wavelength is 15 A.
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