Abstract
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 language | English |
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Pages (from-to) | 2987-2999 |
Number of pages | 13 |
Journal | Thin Solid Films |
Volume | 516 |
Issue number | 10 |
DOIs | |
Publication status | Published - 12 Nov 2007 |
Keywords
- pK(a)
- self-assembled monolayer
- nanoparticle
- surface chemistry
- adhesion