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Encapsulation, Compensation, and Substitution of Catalyst Particles during Continuous Growth of Carbon Nanotubes
Author(s) -
Xiang R.,
Luo G.,
Qian W.,
Zhang Q.,
Wang Y.,
Wei F.,
Li Q.,
Cao A.
Publication year - 2007
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200602468
Subject(s) - carbon nanotube , nanoelectronics , materials science , catalysis , nanotechnology , encapsulation (networking) , electromagnetic shielding , composite material , organic chemistry , computer science , chemistry , computer network
By sequential feeding of catalyst materials (see figure) it is revealed that the active growth sites are at the bottom of carbon nanotubes (CNTs), and that catalyst particles are constantly encapsulated into the CNTs (see figure). This gives a better insight into the mechanism of CNT formation and on ways to control the growth process. CNTs encapsulating different materials should enable the study of their electronic or magnetic properties, with potential applications as building blocks for nanoelectronics and as fillers in composites for electromagnetic shielding.