caa a22 4500 463214722 CHVBK 20180405153152.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s00339-006-3770-2 doi (NATIONALLICENCE)springer-10.1007/s00339-006-3770-2 Synthesis of carbon nanotubes with totally hollow channels and/or with totally copper filled nanowires [Elektronische Daten] [Q. Zhang, W.Z. Qian, H. Yu, F. Wei, Q. Wen] Carbon nanotubes (CNTs) with totally hollow channels and/or totally filled copper nanowires have been fabricated by methane decomposition using copper microgrid as a catalyst at 1173K. The formation mechanism of CNTs with totally hollow channels is carbon precipitation at carbon-metal interface via the preferable surface diffusion mode of carbon. The selectivity of these CNTs can be improved by increasing the purity of copper catalysts and adding hydrogen in the feed gas. To form long and continuous copper nanowires up to 8-10μm the filling of copper in the CNT channel requires the liquid or quasi-liquid state capillary adsorption of nanosized copper at 1173K under the thermal driving force. The filling volume ratio of copper to total nano-channel of the CNTs is firstly increased to about 50%. The copper inside the CNTs is of single crystalline form and face centered cubic (fcc) structure. The method is useful for further controlled synthesis of CNTs with totally hollow channels and/or totally copper filled nanowires. Springer-Verlag, 2006 Zhang Q. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, P.R. China aut Qian W.Z. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, P.R. China aut Yu H. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, P.R. China aut Wei F. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, P.R. China aut Wen Q. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, P.R. China aut Applied Physics A Springer-Verlag 86/2(2007-02-01), 265-269 0947-8396 86:2<265 2007 86 339 https://doi.org/10.1007/s00339-006-3770-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-006-3770-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Q. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, P.R. China aut NATIONALLICENCE 700 1- Qian W.Z. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, P.R. China aut NATIONALLICENCE 700 1- Yu H. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, P.R. China aut NATIONALLICENCE 700 1- Wei F. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, P.R. China aut NATIONALLICENCE 700 1- Wen Q. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, P.R. China aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 86/2(2007-02-01), 265-269 0947-8396 86:2<265 2007 86 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer