Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/190585

Title

Bubble colloidal AFM probes formed from ultrasonically generated bubbles

Author(s)

Vakarelski, Ivan U.;  Lee, Judy;  Dagastine, Raymond R.;  Chan, Derek Y. C.;  Stevens, Geoffrey W.;  Grieser, Franz

Abstract

Here we introduce a simple and effective experimental approach to measuring the interaction forces between two small bubbles (~80-140 μm) in aqueous solution during controlled collisions on the scale of micrometers to nanometers. The colloidal probe technique using atomic force microscopy (AFM) was extended to measure interaction forces between a cantilever-attached bubble and surface-attached bubbles of various sizes. By using an ultrasonic source, we generated numerous small bubbles on a mildly hydrophobic surface of a glass slide. A single bubble picked up with a strongly hydrophobized V-shaped cantilever was used as the colloidal probe. Sample force measurements were used to evaluate the pure water bubble cleanliness and the general consistency of the measurements.

Publication type

Journal article

Source

Langmuir, Vol. 24, no. 3 (Feb 2008), pp. 603-605

Publication year

2008

FOR Code(s)

0306 Physical Chemistry (Incl. Structural);  0904 Chemical Engineering

Keyword(s)

Atomic force microscopy;  Bubble colloidal;  Bubbles (in fluids);  Colloidal probe technique;  Measurement theory;  Probes;  Pure water;  Ultrasonic sources;  Water

Publisher

American Chemical Society

ISSN

0743-7463

Publisher URL

http://dx.doi.org/10.1021/la7032059

Copyright

Copyright © 2008 American Chemical Society.

Peer reviewed