A capillary rise method for studying the effective surface tension of monolayer nanoparticle-covered liquid marbles. Issue 48 (3rd December 2018)

• Record Type: Journal Article
• Authors: Li, Xiaoguang; Wang, Renxian; Huang, Shuai; Wang, Yiqi; Shi, Haixiao
• Is Part Of: Soft matter. Volume 14:Issue 48(2018)
• Page Start: 9877
• Page End: 9884
• Publication Date: 2018-12-03
• Subjects: Soft condensed matter -- Periodicals; 530.413
• DOI: 10.1039/c8sm01846d
• Languages: English
• ISSNs: 1744-683X

Abstract

Abstract : A capillary rise method was developed to study the effective surface tension of liquid marbles with invisible nanoparticle monolayers. Abstract : The liquid marble covered with a xerogel-derived nanoparticle monolayer is emerging as a simple and ideal physical model for fundamental study. In this work, the effective surface tension, γ eff, of this kind of water marble was studied by employing an optimized capillary rise method. This method is distinctive as it can reveal γ eff at a specific point rather than the average γ eff over the entire marble. γ eff at the maximum lateral diameter position was investigated with particle coverage varying from 100% to 10%, showing a quite slow increasing trend from ∼64 to 72 mN m −1 . The delay in the evolution of the γ eff was attributed to the slow decline in the areal particle density on the side area of the marble. For comparative purposes, the maximum height method was also employed to determine γ eff . The results of the two methods supported the position that a liquid marble's γ eff depended on very specific conditions including the measurement method and all marble parameters.