Issue 5, 2016

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

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.

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

Supplementary files

Article information

Article type
Paper
Submitted
03 Nov 2015
Accepted
06 Jan 2016
First published
06 Jan 2016

Nanoscale, 2016,8, 3031-3039

Author version available

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

T. Wang, J. Cui, S. Ouyang, W. Cui and S. Wang, Nanoscale, 2016, 8, 3031 DOI: 10.1039/C5NR07678A

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