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

  • So-Ryong Chae
  • Mathieu Therezien
  • Jeffrey Farner Budarz
  • Lauren Wessel
  • Shihong Lin
  • Yao Xiao
  • Mark R. Wiesner
Research Paper

DOI: 10.1007/s11051-011-0492-y

Cite this article as:
Chae, SR., Therezien, M., Budarz, J.F. et al. J Nanopart Res (2011) 13: 5121. doi:10.1007/s11051-011-0492-y

Abstract

Nanomaterials such as fullerene C60, 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, C60, 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 C60, 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.

Keywords

Fullerene Carbon nanotubes Reactive oxygen species (ROS) Vibrio fischeri Colloidal aggregates Heterogeneity Environmental effects EHS 

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • So-Ryong Chae
    • 1
  • Mathieu Therezien
    • 2
  • Jeffrey Farner Budarz
    • 2
  • Lauren Wessel
    • 2
  • Shihong Lin
    • 2
  • Yao Xiao
    • 2
  • Mark R. Wiesner
    • 2
  1. 1.School of Chemical and Biomolecular EngineeringThe University of SydneySydneyAustralia
  2. 2.Department of Civil and Environmental EngineeringDuke UniversityDurhamUSA

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