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Heterogeneities in fullerene nanoparticle aggregates affecting reactivity, bioactivity, and transport.

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Date
2010-09-28
Authors
Chae, So-Ryong
Badireddy, Appala R
Farner Budarz, Jeffrey
Lin, Shihong
Xiao, Yao
Therezien, Mathieu
Wiesner, Mark R
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Abstract
Properties of nanomaterial suspensions are typically summarized by average values for the purposes of characterizing these materials and interpreting experimental results. We show in this work that the heterogeneity in aqueous suspensions of fullerene C(60) aggregates (nC(60)) must be taken into account for the purposes of predicting nanomaterial transport, exposure, and biological activity. The production of reactive oxygen species (ROS), microbial inactivation, and the mobility of the aggregates of the nC(60) in a silicate porous medium all increased as suspensions were fractionated to enrich with smaller aggregates by progressive membrane filtration. These size-dependent differences are attributed to an increasing degree of hydroxylation of nC(60) aggregates with decreasing size. As the quantity and influence of these more reactive fractions may increase with time, experiments evaluating fullerene transport and toxicity end points must take into account the evolution and heterogeneity of fullerene suspensions.
Type
Journal article
Subject
Bacteriophages
Escherichia coli
Filtration
Fullerenes
Membranes, Artificial
Particle Size
Porosity
Reactive Oxygen Species
Surface Properties
Ultraviolet Rays
Permalink
https://hdl.handle.net/10161/4098
Published Version (Please cite this version)
10.1021/nn100620d
Publication Info
Chae, So-Ryong; Badireddy, Appala R; Farner Budarz, Jeffrey; Lin, Shihong; Xiao, Yao; Therezien, Mathieu; & Wiesner, Mark R (2010). Heterogeneities in fullerene nanoparticle aggregates affecting reactivity, bioactivity, and transport. ACS Nano, 4(9). pp. 5011-5018. 10.1021/nn100620d. Retrieved from https://hdl.handle.net/10161/4098.
This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.
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Scholars@Duke

Wiesner

Mark Wiesner

James B. Duke Distinguished Professor of Civil and Environmental Engineering
Wiesner's research interests include membrane processes, nanostructured materials, transport and fate of nanomaterials in the environment, colloidal and interfacial processes, and environmental systems analysis.
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