Interpretation of Electrostatic Self-Potentials Measurements using Interface-Trapped Microspheres with Surface Heterogeneity
- Authors
- Choi, Kyu Hwan; Kang, Dong Woo; Yoo, Sunghoon; Lee, Seunghyun; Park, Bum Jun
- Issue Date
- Mar-2020
- Publisher
- AMER CHEMICAL SOC
- Keywords
- Heterogeneity; Self-potential; Surface charge patchiness; Fluid interface; Optical tweezers
- Citation
- ACS Applied Polymer Materials, v.2, no.3, pp 1304 - 1311
- Pages
- 8
- Indexed
- SCIE
SCOPUS
ESCI
- Journal Title
- ACS Applied Polymer Materials
- Volume
- 2
- Number
- 3
- Start Page
- 1304
- End Page
- 1311
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/1219
- DOI
- 10.1021/acsapm.9b01189
- ISSN
- 2637-6105
- 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 self-potentials 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.
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Collections - COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY > DEPARTMENT OF CHEMICAL AND MOLECULAR ENGINEERING > 1. Journal Articles
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