Comparison of the photosensitivity and bacterial toxicity of spherical and tubular fullerenes of variable aggregate size

TitleComparison of the photosensitivity and bacterial toxicity of spherical and tubular fullerenes of variable aggregate size
Publication TypeJournal Article
Year of Publication2011
AuthorsChae SR, Therezien M, Budarz JF, Wessel L, Lin SH, Xiao Y, Wiesner MR
JournalJournal of Nanoparticle Research
Volume13
Pagination5121-5127
Date PublishedOct
ISBN Number1388-0764
Accession Numberhttp://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ResearchSoft&SrcApp=EndNote&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000295609700067
Abstract

Nanomaterials such as fullerene C(60), carbon nanotubes (CNTs), and other fullerenes show unique electrical, chemical, mechanical, and thermal properties that are not well understood in the context of the environmental behavior of this class of carbon-based materials. In this study, aqueous suspensions of three fullerenes nanoparticles, C(60), single-wall (SW) and multi-wall (MW) CNTs were prepared by sonication and tested for reactive oxygen species (ROS) production and inactivation of Vibrio fischeri, a gram-negative rod-shaped bacterium, under ultraviolet (UV)-A irradiation. We show that ROS production and microbial inactivation increases as colloidal aggregates of C(60), SWCNT, and MWCNT are fractionated to enrich with smaller aggregates by progressive membrane filtration. As the quantity and influence of these more reactive fractions of the suspension may increase with time and/or as the result of fractionation processes in the laboratory or the environment, experiments evaluating photo-reactivity and toxicity endpoints must take into account the evolution and heterogeneity of nanoparticle aggregates in water.

URLhttp://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ResearchSoft&SrcApp=EndNote&DestLinkType=FullRecord&DestApp=WOS&KeyUT=000295609700067
Alternate JournalJ Nanopart Res