TY - JOUR
T1 - Soft colloidal probes for AFM force measurements between water droplets in oil
AU - Vakarelski, Ivan Uriev
AU - Li, Erqiang
AU - Thoroddsen, Sigurdur T
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: Research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST). Most of the experiments were conducted in KAUST Microfluidics Thrust Area Labs.
PY - 2014/11
Y1 - 2014/11
N2 - Here we introduce an extension of the atomic force microscopy (AFM) colloidal probe technique, as a simple and reliable experimental approach to measure the interaction forces between small water droplets (~80-160. μm) dispersed in oil. Small water droplets are formed by capillary breakup of a microscale water jet in air, which is forced out of a fine capillary nozzle, and deposited on a superhydrophobic substrate immersed in tetradecane oil medium. In these conditions the water droplets are very loosely attached to the superhydrophobic substrate and are easily picked up with a hydrophobic AFM cantilever to form a soft colloidal probe. Sample force measurements are conducted to demonstrate the capability of the technique.
AB - Here we introduce an extension of the atomic force microscopy (AFM) colloidal probe technique, as a simple and reliable experimental approach to measure the interaction forces between small water droplets (~80-160. μm) dispersed in oil. Small water droplets are formed by capillary breakup of a microscale water jet in air, which is forced out of a fine capillary nozzle, and deposited on a superhydrophobic substrate immersed in tetradecane oil medium. In these conditions the water droplets are very loosely attached to the superhydrophobic substrate and are easily picked up with a hydrophobic AFM cantilever to form a soft colloidal probe. Sample force measurements are conducted to demonstrate the capability of the technique.
UR - http://hdl.handle.net/10754/575721
UR - https://linkinghub.elsevier.com/retrieve/pii/S092777571400750X
UR - http://www.scopus.com/inward/record.url?scp=84907775388&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2014.09.028
DO - 10.1016/j.colsurfa.2014.09.028
M3 - Article
SN - 0927-7757
VL - 462
SP - 259
EP - 263
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
ER -