Examining soft particulates using an atomic force microscope and a quartz crystal microbalance

Hodges C. and Biggs S. (2007). Examining soft particulates using an atomic force microscope and a quartz crystal microbalance. In: Meeting of the Japan-Society-for-the-Promotion-of-Science Young Researchers, Kyoto Japan, (615-629). 2006. doi:10.1163/156855207782514987


Author Hodges C.
Biggs S.
Title of paper Examining soft particulates using an atomic force microscope and a quartz crystal microbalance
Conference name Meeting of the Japan-Society-for-the-Promotion-of-Science Young Researchers
Conference location Kyoto Japan
Conference dates 2006
Journal name Advanced Powder Technology   Check publisher's open access policy
Publication Year 2007
Sub-type Fully published paper
DOI 10.1163/156855207782514987
ISSN 0921-8831
Volume 18
Issue 6
Start page 615
End page 629
Total pages 15
Language eng
Abstract/Summary The adsorption of a simple surfactant [cetyltrimethylammonium chloride (CTAC)], in relatively high concentration salt solutions has been studied using atomic force microscopy (AFM) and a quartz crystal microbalance (QCM). Two oppositely charged surfaces were investigated: silica and alumina. The AFM images demonstrated clear adsorption of spherical CTAC micelles on silica but not on alumina, as expected. However, AFM images indicated the presence of rod and worm-like micelles of CTAC on both surfaces in agreement with what was expected from the solutions being used. This was explained in terms of the much greater stability of these larger structures in the vicinity of the AFM tip compared to the much smaller spherical micelles, even though no bonding will take place at the alumina surface. The QCM data on these solutions also shows a significant difference in the behavior for the spherical micelle system when compared with the rod or worm-like systems. From the QCM data we infer that a slip plane is present for the worm-like solutions and that the effect of slip on the data increases as the salt concentration increases.
Subjects 1500 Chemical Engineering
Keyword Adsorption
Atomic force microscope
Cetyltrimethylammonium chloride
Micelles
Quartz crystal microbalance
Slip
Structured fluids
Worm-like micelles
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Conference Paper
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