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Deposition of aggregated nanoparticles--a theoretical and experimental study on the effect of aggregation state on the affinity between nanoparticles and a collector surface.

Publication ,  Journal Article
Lin, S; Wiesner, MR
Published in: Environmental science & technology
December 2012

Theoretical and experimental approaches were employed to study the effect of aggregation on the affinity between nanoparticles (NPs) and a flat surface that is quantified by the attachment efficiency. Computer simulations were used to generate virtual aggregates formed via either diffusion limited cluster aggregation or reaction limited cluster aggregation. The colloidal interactions between the simulated aggregates and a flat surface were evaluated based on the surface element integration approach. It was found that the strength of colloidal interaction for the aggregated NPs was on the same order of magnitude as those for the primary particles and was significantly weaker than that for an equivalent sphere defined by the gyration radius of the aggregate. The results from the deposition experiments using quartz crystal microbalance suggested that the attachment efficiencies (unfavorable deposition) for aggregated NPs were higher at the initial stage but later became similar to that of the primary NPs when equilibrium deposition was reached. The high initial affinity was postulated to be attributable to secondary minimum deposition. These results suggest that it is the size of the primary particles, not that of the aggregates, that determines the strength of the colloidal interaction between the aggregate and an environmental surface.

Duke Scholars

Published In

Environmental science & technology

DOI

EISSN

1520-5851

ISSN

0013-936X

Publication Date

December 2012

Volume

46

Issue

24

Start / End Page

13270 / 13277

Related Subject Headings

  • Thermodynamics
  • Surface Properties
  • Quartz Crystal Microbalance Techniques
  • Models, Theoretical
  • Metal Nanoparticles
  • Kinetics
  • Hydrodynamics
  • Gold
  • Fractals
  • Environmental Sciences
 

Citation

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Lin, S., & Wiesner, M. R. (2012). Deposition of aggregated nanoparticles--a theoretical and experimental study on the effect of aggregation state on the affinity between nanoparticles and a collector surface. Environmental Science & Technology, 46(24), 13270–13277. https://doi.org/10.1021/es3041225
Lin, Shihong, and Mark R. Wiesner. “Deposition of aggregated nanoparticles--a theoretical and experimental study on the effect of aggregation state on the affinity between nanoparticles and a collector surface.Environmental Science & Technology 46, no. 24 (December 2012): 13270–77. https://doi.org/10.1021/es3041225.
Lin, Shihong, and Mark R. Wiesner. “Deposition of aggregated nanoparticles--a theoretical and experimental study on the effect of aggregation state on the affinity between nanoparticles and a collector surface.Environmental Science & Technology, vol. 46, no. 24, Dec. 2012, pp. 13270–77. Epmc, doi:10.1021/es3041225.
Journal cover image

Published In

Environmental science & technology

DOI

EISSN

1520-5851

ISSN

0013-936X

Publication Date

December 2012

Volume

46

Issue

24

Start / End Page

13270 / 13277

Related Subject Headings

  • Thermodynamics
  • Surface Properties
  • Quartz Crystal Microbalance Techniques
  • Models, Theoretical
  • Metal Nanoparticles
  • Kinetics
  • Hydrodynamics
  • Gold
  • Fractals
  • Environmental Sciences