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Interpretation of Electrostatic Self-Potentials Measurements using Interface-Trapped Microspheres with Surface Heterogeneity

Title
Interpretation of Electrostatic Self-Potentials Measurements using Interface-Trapped Microspheres with Surface Heterogeneity
Author
이승현
Keywords
Heterogeneity; Self-potential; Surface charge patchiness; Fluid interface; Optical tweezers
Issue Date
2020-03
Publisher
American Chemical Society
Citation
Acs Applied Polymer Materials, v. 2, no. 3, page. 1304-1311
Abstract
Electrostatic self-potentials of individual particles trapped at an oil−water interface were determined, and the effects of surface chemical nonuniformity on heterogeneous self-potentials and equilibrium microstructures were investigated. Direct measurement of the pair interactions and the self-potentials of polystyrene microspheres were performed using optical laser tweezers. The individual particles had different selfpotentials even when they possessed the same surface functionalities. Atomic force microscopy measurements elucidated the relationship between nonuniform surface charge distribution and heterogeneity and magnitude of self-potentials. Monte Carlo simulations demonstrated that self-potential heterogeneity led to the formation of more melted microstructures that showed excellent consistency with experiments.
URI
https://pubs.acs.org/doi/10.1021/acsapm.9b01189https://repository.hanyang.ac.kr/handle/20.500.11754/163069
ISSN
2637-6105
DOI
10.1021/acsapm.9b01189
Appears in Collections:
COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > CHEMICAL AND MOLECULAR ENGINEERING(화학분자공학과) > Articles
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