Adhesion of nano-sized particles to the surface of bacteria: Mechanistic study with the extended DLVO theory

Geelsu Hwang, Ik Sung Ahn, Byung Jin Mhin, Ju Young Kim

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)


Due to the increasing production and application of nanoparticles, their release into the environment would be inevitable, which requires a better understanding of their fate in the environment. When considering their toxic behavior or biodegradation as their fate, their adhesion to the cell surface must be the first step to be thoroughly studied. In this study, nano-sized polymeric particles of urethane acrylate with various hydrophobicity and ionic properties were synthesized as model nanoparticles, and their adhesion to Pseudomonas putida strains was monitored. The higher hydrophobicity and positive charge density on the particle surface exhibited the larger adhesion to the bacteria, whereas negative charge density on the particle hindered their adhesion to the bacteria, albeit high hydrophobicity of particle. These observations were successfully explained with the extended Derjaguin-Landau-Verwey-Overbeek (DLVO) theory.

Original languageEnglish
Pages (from-to)138-144
Number of pages7
JournalColloids and Surfaces B: Biointerfaces
Publication statusPublished - 2012 Sept 1

Bibliographical note

Funding Information:
This work was supported by grants from the Korea Science and Engineering Foundation (KOSEF; funded by the Korea government , No. R01-2007-000-11570-0 ) and the Basic Science Research Program of the National Research Foundation of Korea (NRF; funded by the Ministry of Education, Science and Technology , No. 2010-0001451 ).

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry


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