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Reactivity Differences between Carbon Nano Onions (CNOs) Prepared by Different Methods
Author(s) -
Palkar Amit,
Melin Frederic,
Cardona Claudia M.,
Elliott Bevan,
Naskar Amit K.,
Edie Danny D.,
Kumbhar Amar,
Echegoyen Luis
Publication year - 2007
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.200600426
Subject(s) - graphite , fullerene , carbon fibers , reactivity (psychology) , annealing (glass) , materials science , electric arc , nano , nanoparticle , nanotechnology , chemical engineering , chemistry , composite material , organic chemistry , electrode , composite number , medicine , alternative medicine , pathology , engineering
The carbon nanoparticles obtained from either arcing of graphite under water or thermal annealing of nanodiamonds are commonly called carbon nano onions (CNOs), or spherical graphite, as they are made of concentric fullerene cages separated by the same distance as the shells of graphite. A more careful analysis reveals some dramatic differences between the particles obtained by these two synthetic methods. Physicochemical methods indicate that the CNOs obtained from nanodiamonds ( N ‐CNOs) are smaller and contain more defects than the CNOs obtained from arcing ( A ‐CNOs). These properties explain the enhanced reactivity of the N ‐CNOs in cycloaddition and oxidation reactions, as well as in reactions involving radicals. Given the easier functionalization of the N ‐CNOs, they are the most obvious choice for studying the potential applications of these multi‐shelled fullerenes.