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Aggregation and adhesion of gold nanoparticles in phosphate buffered saline

  • Shangfeng DuEmail author
  • Kevin Kendall
  • Panteha Toloueinia
  • Yasamin Mehrabadi
  • Gaurav Gupta
  • Jill Newton
Research Paper

Abstract

In applications in medicine and more specifically drug delivery, the dispersion stability of nanoparticles plays a significant role on their final performances. In this study, with the use of two laser technologies, dynamic light scattering (DLS) and nanoparticle tracking analysis (NTA), we report a simple method to estimate the stability of nanoparticles dispersed in phosphate buffered saline (PBS). Stability has two features: (1) self-aggregation as the particles tend to stick to each other; (2) disappearance of particles as they adhere to surrounding substrate surfaces such as glass, metal, or polymer. By investigating the effects of sonication treatment and surface modification by five types of surfactants, including nonylphenol ethoxylate (NP9), polyvinyl pyrrolidone (PVP), human serum albumin (HSA), sodium dodecyl sulfate (SDS) and citrate ions on the dispersion stability, the varying self-aggregation and adhesion of gold nanoparticles dispersed in PBS are demonstrated. The results showed that PVP effectively prevented aggregation, while HSA exhibited the best performance in avoiding the adhesion of gold nanoparticle in PBS onto glass and metal. The simple principle of this method makes it a high potential to be applied to other nanoparticles, including virus particles, used in dispersing and processing.

Keywords

Nanoparticles Aggregation Adhesion Dynamic light scattering Nanoparticle tracking analysis Nanomedicine 

Notes

Acknowledgments

This study was supported by a Research Fellowship from Science City Research Alliance (SCRA) awarded to Dr Du.

Supplementary material

11051_2012_758_MOESM1_ESM.mpg (1.6 mb)
A short movie of NTA measurement for the sample with 30 ppm PVP added in gold nanoparticles dispersed in PBS. Supplementary material 1 (MPG 1674 kb)
11051_2012_758_MOESM2_ESM.doc (94 kb)
Supplementary material 2 (DOC 94 kb)

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Shangfeng Du
    • 1
    Email author
  • Kevin Kendall
    • 1
  • Panteha Toloueinia
    • 1
  • Yasamin Mehrabadi
    • 1
  • Gaurav Gupta
    • 1
  • Jill Newton
    • 1
  1. 1.School of Chemical EngineeringUniversity of BirminghamEdgbaston, BirminghamUK

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