Thermally Induced, Tension-Gradient-Driven Self-Assembly of Nanoparticle Films for Superhydrophobicity and Oil-Water Separation

被引：19

作者：

Li, Xuan ^{[1
]}

Chen, Lei ^{[1
]}

Feng, Dong ^{[1
]}

Weng, Ding ^{[1
]}

Wang, Jiadao ^{[1
]}

机构：

[1] Tsinghua Univ, State Key Lab Tribol, Beijing 100084, Peoples R China

来源：

CELL REPORTS PHYSICAL SCIENCE | 2020年 / 1卷 / 10期

关键词：

MARANGONI CONVECTION; HEAT-TRANSFER; EVAPORATION; MOTION; DEPOSITION; PARTICLES; INTERFACE; CRYSTALS; SURFACES; COATINGS;

D O I：

10.1016/j.xcrp.2020.100220

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Self-assembly is one of the most popular ways to produce nanoparticle (NP) films, but it is still limited by expensive instruments, time-consuming processes, and poor controllability. Here we present a thermally induced, tension-gradient-driven nanoparticle self-assembly method to realize high-efficiency, cost-effective, environmentally friendly, and controllable fabrication of large-area NP films. The driving force of this self-assembly method comes from the tension gradient of the air-liquid interface and particle-liquid interface. Meniscus shape, immersion velocity, and temperature have significant effects on self-assembly. The as-prepared ultrathin NP films are closely packed, and the number of layers can be well controlled, exhibit excellent superhydrophobic/superoleophilic properties, and can separate various oil-water mixtures with high efficiency. Moreover, the method is suitable for various 2D and 3D substrates, which may enable efficient and controllable fabrication of NP films.

引用

页数：16

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