title: Defect studies on as-synthesized and purified carbon nanostructures produced by arc-discharge in solution process.
abstract: Carbon nanostructures are synthesized using a novel arc-discharge in solution process. A multitude of defects on nanotubes and nanostructures is found. Evidence of these defects in as-synthesized carbon nanostructures is explored using high-resolution transmission electron microscopy (HRTEM). Tri-, tetra-, penta-, hexa-, heptagonal, toroidal, oval, and spherical nanoshells are found in HRTEM investigation along with carbon nanotubes, carbon nanohorns, carbon rods, nanoporous carbon, dislodged graphene sheets, and amorphous carbon. Purifications are carried out through two oxidation methods to eliminate the amorphous carbon. Several different defects caused by oxidations are also found in purified samples.
authors.affiliation: Surface Engineering and Nanotechnology Facility, Department of Mechanical, Material and Aerospace Engineering, University of Central Florida, Orlando 32816, USA.
authors.forename: Debasis
authors.initials: D
authors.lastname: Bera
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Perrault
authors.forename: Helge
authors.initials: H
authors.lastname: Heinrich
authors.forename: Sudipta
authors.initials: S
authors.lastname: Seal
mesh_terms: D002244:Carbon / Q000737:chemistry* / Q000302:isolation & purification; D003460:Crystallization / Q000379:methods*; D004563:Electrochemistry / Q000379:methods*; D006358:Hot Temperature; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods; D010316:Particle Size; D012996:Solutions; D013499:Surface Properties
chemical_list: D012996:Solutions; D002244:Carbon