A new approach to understand the Cassie state of liquids on superamphiphobic materials

Nanoscale
Tao WangSheng Wang

Abstract

A hierarchical structure is a prerequisite for a liquid super-repellent surface due to its capability to catch large numbers of fine air-pockets. In the present work, a series of hierarchical nanocomposites with anti-wettability were fabricated by in situ deposition of spherical SiO2 nanoparticles on Te@C nanofibers. N2 adsorption-desorption isotherms were used for the first time to characterize the air-pockets and relate them to the wettability of the nanocomposites. The results indicate that superamphiphobicity is a contribution of a delicate synergistic effect between a micro-scale structure and a nano-scale structure. Significant dominance of either of them led to reduced superamphiphobicity. The superamphiphobic "beads on a string" materials should meet the following features: higher SBET that ensures enough air-pockets (SBET value of the superamphiphobic sample is much higher than that of the superhydrophobic one); and the most important, a "continuous and balanced" distribution of micro and macro air-pockets derived from hierarchical structures.

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Citations

Feb 23, 2017·ACS Applied Materials & Interfaces·Lu JiangDennis W Hess
Dec 3, 2016·Angewandte Chemie·Seok Min YoonBartosz A Grzybowski
Jun 27, 2017·ACS Applied Materials & Interfaces·Sheng WangTao Wang
Sep 2, 2017·Small·Shuai LiuTong Lin
Jan 30, 2020·Biomaterials Science·Haifeng Fan, Zhiguang Guo
Jun 9, 2021·ACS Applied Materials & Interfaces·Tao WangSheng Wang
Sep 12, 2020·ACS Applied Materials & Interfaces·Tao WangSheng Wang

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