In this section
@article{Dattani:2015:10.1016/j.jcis.2015.01.005,
author = {Dattani, R and Gibson, KF and Few, S and Borg, AJ and DiMaggio, PA and Nelson, J and Kazarian, SG and Cabral, JT},
doi = {10.1016/j.jcis.2015.01.005},
journal = {Journal of Colloid and Interface Science},
pages = {24--30},
title = {Fullerene oxidation and clustering in solution induced by light},
url = {http://dx.doi.org/10.1016/j.jcis.2015.01.005},
volume = {446},
year = {2015}
}
TY - JOUR
AB - We investigate the environmental stability of fullerene solutions by static and dynamic light scattering, FTIR, NMR and mass spectroscopies, and quantum chemical calculations. We find that visible light exposure of fullerene solutions in toluene, a good solvent, under ambient laboratory conditions results in C60 oxidation to form fullerene epoxides, and subsequently causes fullerene clustering in solution. The clusters grow with time, even in absence of further illumination, and can reach dimensions from ≈100 nm to the μm scale over ≈1 day. Static light scattering suggests that resulting aggregates are fractal, with a characteristic power law (df) that increases from approximately 1.3 to 2.0 during light exposure. The clusters are bound by weak Coulombic interactions and are found to be reversible, disintegrating by mechanical agitation and thermal stress, and reforming over time. Our findings are relevant to the solution processing of composites and organic photovoltaics, whose reproducibility and performance requires control of fullerene solution stability under storage conditions.
AU - Dattani,R
AU - Gibson,KF
AU - Few,S
AU - Borg,AJ
AU - DiMaggio,PA
AU - Nelson,J
AU - Kazarian,SG
AU - Cabral,JT
DO - 10.1016/j.jcis.2015.01.005
EP - 30
PY - 2015///
SN - 1095-7103
SP - 24
TI - Fullerene oxidation and clustering in solution induced by light
T2 - Journal of Colloid and Interface Science
UR - http://dx.doi.org/10.1016/j.jcis.2015.01.005
UR - http://hdl.handle.net/10044/1/25661
VL - 446
ER -
Jenny Nelson
Professor of Physics
1007, Huxley Building
South Kensington, London, SW7 2AZ