Direct measurements of the colloidal Debye force.

Autor: Lee HM; Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin, Gyeonggi-do, 17104, South Korea., Kim YW; Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin, Gyeonggi-do, 17104, South Korea., Go EM; School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, 44919, South Korea.; Corning Technology Center Korea, Corning Precision Materials Co., Ltd., 212 Tangjeong-ro, Asan, Chungcheongnam-do, 31454, South Korea., Revadekar C; Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin, Gyeonggi-do, 17104, South Korea., Choi KH; Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin, Gyeonggi-do, 17104, South Korea.; Department of Chemical Engineering, University of California Santa Barbara, Santa Barbara, CA, 93106, USA., Cho Y; School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology, Ulsan, 44919, South Korea., Kwak SK; Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, South Korea. skkwak@korea.ac.kr., Park BJ; Department of Chemical Engineering (BK21 FOUR Integrated Engineering Program), Kyung Hee University, Yongin, Gyeonggi-do, 17104, South Korea. bjpark@khu.ac.kr.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2023 Jun 29; Vol. 14 (1), pp. 3838. Date of Electronic Publication: 2023 Jun 29.
DOI: 10.1038/s41467-023-39561-8
Abstrakt: Colloids often behave in a manner similar to their counterparts in molecular space and are used as model systems to understand molecular behavior. Here, we study like-charged colloidal attractions between a permanent dipole on an interfacial particle and its induced dipole on a water-immersed particle caused by diffuse layer polarization. We find that the scaling behavior of the measured dipole-induced dipole (D‒I) interaction via optical laser tweezers is in good agreement with that predicted from the molecular Debye interaction. The dipole character propagates to form aggregate chains. Using coarse-grained molecular dynamic simulations, we identify the separate roles of the D‒I attraction and the van der Waals attraction on aggregate formation. The D‒I attraction should be universal in a broad range of soft matter, such as colloids, polymers, clays, and biological materials, motivating researchers to further conduct in-depth research on these materials.
(© 2023. The Author(s).)
Databáze: MEDLINE
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