منابع مشابه
Aromaticity of Carbon Nanotubes
Carbon nanotubes are composed of cylindrical graphite sheets. Both nanotubes and graphite sheets are benzenoid derivatives composed of sp2 carbon atoms arranged in a hexagonal pattern. Therefore both systems are aromatic. The extent of the aromatic character of a molecule G (here benzenoids) can be explained in terms of the number of possible Kekulé structures in G. In this work the Kekulé stru...
متن کاملinvestigation of the electronic properties of carbon and iii-v nanotubes
boron nitride semiconducting zigzag swcnt, $b_{cb}$$n_{cn}$$c_{1-cb-cn}$, as a potential candidate for making nanoelectronic devices was examined. in contrast to the previous dft calculations, wherein just one boron and nitrogen doping configuration have been considered, here for the average over all possible configurations, density of states (dos) was calculated in terms of boron and nitrogen ...
15 صفحه اولNanotubes: Number of Kekulé Structures and Aromaticity
Carbon nanotubes (CNTs) are composed of cylindrical graphite sheets consisting of sp(2) carbons. Due to their structure CNTs are considered to be aromatic systems. In this work the number of Kekulé structures (K) in "armchair" CNTs was estimated by using the transfer matrix technique. All Kekulé structures of the cyclic variants of naphthalene and benzo[c]phenanthrene have been generated and th...
متن کاملCarbon Nanotubes
The Amazing and Versatile Carbon – Chemical basis for life With an atomic number of 6, Carbon is the 4th most abundant element in the Universe by mass after (Hydrogen Helium and Oxygen). It forms more compounds that any other element, with almost 10 million pure organic compounds. Abundance, together with the unique diversity of organic compounds and their unusual polymer forming ability at the...
متن کاملCarbon Nanotubes
C is an extraordinary element, considering the diversity of materials it forms. Ranging from sparkling gems to sooty filth, these materials have been studied and used for centuries, and carbon science was long thought to be a mature field. So when a whole new class of carbon materials— the fullerenes, such as C6o— appeared in the last decade, many scientists were surprised. The consequences hav...
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ژورنال
عنوان ژورنال: ChemInform
سال: 2007
ISSN: 0931-7597,1522-2667
DOI: 10.1002/chin.200733212