Nucleation and cap formation on symmetric metal nanocatalysts: A first step towards chirality-controlled single-walled carbon nanotube growth

Autor:	Tefera, Anteneh G, Mochena, Mogus D
Rok vydání:	2013
Předmět:	Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
Popis:	Symmetric minima of surface potential energy of a nanocatalyst act as nucleation sites for chirally selective initial growth of single walled carbon tubes at low temperatures. The nucleation sites are sites of maximum coordination number of the adsorbed carbon. We show this using the five fold symmetry of a pentagonal pyramid of an icosahedron. Initial zigzag structure from nucleation sites results in formation of hexagons and pentagons that result in anomalous cap formation. Possible cap lift off mechanism is discussed. Comment: 5 pages and two figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1304.8078 Zobrazit plný text záznamu View this record from Arxiv