Effects of the reaction atmosphere composition on the synthesis of single and multiwalled nitrogen-doped nanotubes

被引:37
作者
Ayala, P.
Grueneis, A.
Kramberger, C.
Ruemmeli, M. H.
Solorzano, I. G.
Freire, F. L., Jr.
Pichler, T.
机构
[1] IFW Dresden, D-01171 Dresden, Germany
[2] Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22453900 Rio de Janeiro, Brazil
[3] Tech Univ Szczecin, PL-70322 Szczecin, Poland
[4] Pontificia Univ Catolica Rio de Janeiro, DCMM, BR-22452970 Rio de Janeiro, Brazil
关键词
D O I
10.1063/1.2781509
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Single and multiwalled nitrogen-doped carbon nanotubes were grown by chemical vapor deposition varying the feedstock composition between pure acetonitrile and ethanol/acetonitrile mixtures. The advantage of using C/N sources that develop close vapor pressure values has been used in order to elucidate the effects of the reaction atmosphere in the synthesis of N-doped nanotubes. Our findings show that the morphology of the nanotube material depends strongly on the composition of the reaction atmosphere. When carrying out the experiments in an atmosphere solely determined by the vapor pressure of the feedstock components, improved homogeneity is achieved with pure C/N sources or low concentration of the foreign solute. Under these conditions the temperature has strong influence in the diameter distribution.
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页数:6
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