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Multiscale Structures Aggregated by Imprinted Nanofibers for Functional Surfaces

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Published on: September 11, 2018

Superhydrophobic micro/nano dual-scale structures.

Xiaosheng Zhang¹, Qianli Di, Fuyun Zhu

¹Science and Technology on Micro/Nano Fabrication Lab, Peking University, Beijing 100871, China.

Journal of Nanoscience and Nanotechnology

|May 8, 2013

Summary

Researchers developed superhydrophobic micro/nano dual structures (MNDS) for advanced surfaces. These robust MNDS exhibit excellent water repellency, paving the way for self-cleaning and microfluidic applications.

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Area of Science:

Materials Science
Surface Engineering
Nanotechnology

Background:

Superhydrophobic surfaces mimic natural water-repellent phenomena.
Achieving stable superhydrophobicity often requires complex fabrication.
Micro/nano dual-scale structures offer enhanced performance.

Purpose of the Study:

To present novel superhydrophobic micro/nano dual structures (MNDS).
To demonstrate a fabrication method for robust superhydrophobic surfaces.
To explore potential applications in self-cleaning and microfluidics.

Main Methods:

Fabrication of microstructures via KOH-etching of silicon.
Formation of high-aspect-ratio nanopillars using maskless deep reactive ion etching (DRIE).
Characterization of surface properties including contact angle and contact angle hysteresis.

Main Results:

Successfully fabricated micro/nano dual structures (MNDS) on silicon.
Achieved superhydrophobicity with a contact angle of -165° and hysteresis < 1°.
Demonstrated stable superhydrophobicity under mechanical stress and high voltage (-300 V).

Conclusions:

MNDS exhibit reliable and stable superhydrophobicity.
The developed fabrication method is effective for creating advanced superhydrophobic surfaces.
MNDS show significant potential for self-cleaning surfaces and superhydrophobic micro/nano fluidics.