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The Role of Sulfur in the Synthesis of Novel Carbon Morphologies: From Covalent Y‐Junctions to Sea‐Urchin‐Like Structures
Author(s) -
RomoHerrera Jose´ M.,
Cullen David A.,
CruzSilva Eduardo,
Ramírez Daniel,
Sumpter Bobby G.,
Meunier V.,
Terrones Humberto,
Smith David J.,
Terrones Mauricio
Publication year - 2009
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200800931
Subject(s) - materials science , nanostructure , high resolution transmission electron microscopy , sulfur , nanotechnology , covalent bond , carbon nanotube , microanalysis , chemical engineering , carbon fibers , chemical vapor deposition , transmission electron microscopy , lamellar structure , organic chemistry , composite material , chemistry , composite number , engineering , metallurgy
A detailed characterization, using high resolution electron microscopy/microanalysis (SEM, TEM, HRTEM, and EDX), reveals tubular carbon nanostructures exhibiting complex and fascinating morphologies. The materials were obtained by sulfur‐assisted chemical vapor deposition. It is demonstrated that S not only acts on the catalyst, but also can be detected in the carbon lattice of the nanostructures. The experimental data presented here confirms the critical role of S, which is responsible for inducing curvature and therefore influencing the final carbon nanostructure morphology. In particular, different types of covalent Y‐junctions of CNTs and even sea urchin‐like nanostructures were produced and their experimental conditions are listed and discussed.