Influence of nanobubbles on the adsorption of nanoparticles
SCIE
SCOPUS
- Title
- Influence of nanobubbles on the adsorption of nanoparticles
- Authors
- Seo, H; Yoo, M; Jeon, S
- Date Issued
- 2007-02-13
- Publisher
- AMER CHEMICAL SOC
- Abstract
- A quartz crystal microbalance was used to study the influence of nanobubbles on the adsorption of polystyrene nanoparticles onto surfaces coated with gold, or coated with dodecanethiol or mercaptoundecanoic acid self-assembled monolayers (SAMs). Adsorption of the nanoparticles onto the surface causes the resonant frequency of the quartz crystal to decrease. We found that particles were adsorbed onto the gold-coated quartz crystal in air-rich water, but not in degassed water. This finding supports the long-standing hypothesis that nanobubbles play a key role in the long-range attractive force between hydrophobic surfaces in aqueous solutions. When the experiments were conducted using quartz crystals coated with a hydrophobic dodecanethiol SAM, the nanoparticles were adsorbed onto the surface even in degassed water due to the short-range hydrophobic interactions between the nanoparticles and the dodecanethiol molecules. In contrast, the nanoparticles were adsorbed to a lesser degree onto the hydrophilic mercaptoundecanoic acid-coated crystals due to electrostatic repulsive forces.
- Keywords
- HYDROPHOBIC SURFACES; RANGE ATTRACTION; LONG-RANGE; WATER; FORCES; INTERFACE; BUBBLES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/23575
- DOI
- 10.1021/LA062763R
- ISSN
- 0743-7463
- Article Type
- Article
- Citation
- LANGMUIR, vol. 23, no. 4, page. 1623 - 1625, 2007-02-13
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.