The pH-dependent adhesion of nanoparticles to self-assembled monolayers on gold

J Bowen, Mayandithevar Manickam, S Evans, K Critchley, K Kendall, Jon Preece, James Bowen

Research output: Contribution to journalArticle

10 Citations (Scopus)


The effect of pH on the adhesion of silica and polystyrene latex nanoparticles, presenting hydroxyl and carboxylic acid surface chemistries respectively, to self-assembled monolayers (SAMs) has been investigated. The SAMs studied were 1-dodecanethiol, 11-mercaptoundecanoic acid and an original pyridine-terminated SAM. Adhesion of nanoparticles to the SAMs was found to decrease with increasing pH due to increased repulsive forces between surfaces, as a result of the deprotonation of surface moieties on the nanoparticles. A range of surface morphologies for the adsorbed nanoparticles was observed for the systems studied. (c) 2007 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)2987-2999
Number of pages13
JournalThin Solid Films
Issue number10
Publication statusPublished - 12 Nov 2007


  • pK(a)
  • self-assembled monolayer
  • nanoparticle
  • surface chemistry
  • adhesion


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