News Column

Researchers from Beijing Normal University Detail Findings in Fullerenes

February 7, 2014



By a News Reporter-Staff News Editor at Science Letter -- Fresh data on Fullerenes are presented in a new report. According to news reporting from Beijing, People's Republic of China, by NewsRx journalists, research stated, "Catalyst-free and self-assembled growth of graphene flakes (GFs) on carbon nanotube (CNT) arrays have been realized by using microwave plasma enhanced chemical vapor deposition. The shape of GFs was highly manipulated by adjusting the growth time, C concentration, and microwave power."

The news correspondents obtained a quote from the research from Beijing Normal University, "We qualitatively discussed the nucleation and growth mechanism of GFs based on the growth parameter-GF shape studies. The field emission (FE) properties of graphene flake-carbon nanotube (GF-CNT) composites for different GF shapes were measured and found to be strongly influenced by the GF distribution. The optimal shape of GFs for FE had small scales, sharp edges, and sparse distribution on CNTs. The best FE properties with the optimal shape were observed with a low turn-on electric field of 0.73 V/mu m and excellent stability, which are superior to those of the as-grown CNT arrays and GF-CNT composites covered by densely distributed GFs."

According to the news reporters, the research concluded: "We consider that the large aspect ratio of CNTs and the unique FE stability of GFs play a synergetic effect on the improved FE properties."

For more information on this research see: Catalyst-free, self-assembly, and controllable synthesis of graphene flake-carbon nanotube composites for high-performance field emission. Carbon, 2014;67():525-533. Carbon can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Carbon - www.elsevier.com/wps/product/cws_home/258)

Our news journalists report that additional information may be obtained by contacting J.H. Deng, Beijing Normal University, Minist Educ, Key Lab Beam Technol & Mat Modificat, Beijing 100875, People's Republic of China. Additional authors for this research include G.A. Cheng, R.T. Zheng, B. Yu, G.Z. Li, X.G. Hou, M.L. Zhao and D.J. Li (see also Fullerenes).

Keywords for this news article include: Asia, Beijing, Fullerenes, Carbon Nanotubes, People's Republic of China

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


For more stories covering the world of technology, please see HispanicBusiness' Tech Channel



Source: Science Letter


Story Tools