Identifying and counting point defects in carbon nanotubes
نویسندگان
چکیده
منابع مشابه
Defects in carbon nanotubes.
Carbon nanotubes are quasi one-dimensional nanostructures with unique eletrical prroperties that make them prime candidates for molecular electronics, which is certainly a most promising direction in nanotechnology. Early theoretical works predicted that the electronic properties of "ideal" carbon nanotubes depend on their diameter and chirality. However, carbon nanotubes are probably not as pe...
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The presence of defects subtly alters all of a material’s properties. Chemical reactivity, mechanical strength, optical absorption, and electronic transport all vary with defect concentration. Despite these wide-ranging effects, however, it is very rare for defect control to be critical to a particular application. For example, electronic circuits perform perfectly well in the presence of defec...
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This thesis studies carbon nanotubes using state-of-the-art computational methods. Using large-scale quantum-mechanical calculations, based on density-functional-theory (DFT), we investigate several important aspects of the physics and chemistry of single-walled-nanotubes. The focus is on the effect of defects, namely adparticles and vacancies, on the structural, electronic and dynamical proper...
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The high thermal conductivities of carbon nanotubes (CNTs) measured experimentally and predicted from theory suggest that they are good candidates for next-generation thermal management materials. The quantities of CNTs needed in applications preclude the use of pristine products. Limited work, however, has been done to study thermal transport in CNTs with defects. In this paper, the thermal co...
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Owing to their influence on electrons and phonons, defects can significantly alter electrical conductance, and optical, mechanical and thermal properties of a material. Thus, understanding and control of defects, including dopants in low-dimensional systems, hold great promise for engineered materials and nanoscale devices. Here, we characterize experimentally the effects of a single defect on ...
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ژورنال
عنوان ژورنال: Nature Materials
سال: 2005
ISSN: 1476-1122,1476-4660
DOI: 10.1038/nmat1516