Chemical vapor deposition of carbon nanotubes on monolayer graphene substrates: reduced etching via suppressed catalytic hydrogenation using C2H4

Autor:	Kumar, Kitu, Kim, Youn-Su, Li, Xin, Ding, Junjun, Fisher, Frank T., Yang, Eui-Hyeok
Rok vydání:	2013
Předmět:	Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
Popis:	In most envisioned applications, full utilization of a graphene-carbon nanotube (CNT) construct requires maintaining the integrity of the graphene layer during the CNT growth step. In this work, we exhibit an approach towards controlled CNT growth atop graphene substrates where the reaction equilibrium between source hydrocarbon decomposition and carbon saturation into and precipitation from the catalyst nanoparticles shifts towards CNT growth rather than graphene consumption. By utilizing C2H4 feedstock, we demonstrate that the low temperature growth permissible with this gas suppresses undesirable catalytic hydrogenation and dramatically reduces the etching of the graphene layer to exhibit graphene-CNT hybrids with continuous, undamaged structures.
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1308.2437 Zobrazit plný text záznamu View this record from Arxiv