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Related Concept Videos

Micelles01:30

Micelles

Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...

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Related Experiment Video

Updated: Jun 13, 2026

Dry Oxidation and Vacuum Annealing Treatments for Tuning the Wetting Properties of Carbon Nanotube Arrays
08:59

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Published on: April 15, 2013

Superhydrophobic cylindrical nanoshell array.

Yong-Bum Park1, Maesoon Im, Hwon Im

  • 1Department of Electrical Engineering, KAIST, Daejeon 305-701, Republic of Korea.

Langmuir : the ACS Journal of Surfaces and Colloids
|May 6, 2010
PubMed
Summary
This summary is machine-generated.

Researchers created a superhydrophobic surface using a unique silicon nanoshell array, demonstrating superior water-repellency without coatings. This durable structure maintains its properties even under dynamic conditions.

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Ligand Nano-cluster Arrays in a Supported Lipid Bilayer
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Last Updated: Jun 13, 2026

Dry Oxidation and Vacuum Annealing Treatments for Tuning the Wetting Properties of Carbon Nanotube Arrays
08:59

Dry Oxidation and Vacuum Annealing Treatments for Tuning the Wetting Properties of Carbon Nanotube Arrays

Published on: April 15, 2013

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10:34

Ligand Nano-cluster Arrays in a Supported Lipid Bilayer

Published on: April 23, 2017

Area of Science:

  • Materials Science
  • Surface Science
  • Nanotechnology

Background:

  • Superhydrophobic surfaces mimic natural water-repellent phenomena.
  • Achieving stable superhydrophobicity often requires chemical coatings.
  • Geometric nanostructures offer an alternative route to superhydrophobicity.

Purpose of the Study:

  • To demonstrate superhydrophobicity on a novel cylindrical poly crystalline silicon nanoshell array.
  • To investigate the role of geometrical properties in achieving water-repellency.
  • To confirm the stability of the superhydrophobic state under dynamic conditions.

Main Methods:

  • Fabrication of a cylindrical poly crystalline silicon nanoshell array.
  • Characterization of surface wettability and water-repellency.
  • Calculation of capillary pressure to assess air pillar stability.
  • Droplet impinging tests to evaluate dynamic stability.

Main Results:

  • The nanoshell array exhibited superhydrophobic properties solely due to its geometry, without any hydrophobic coating.
  • The proposed structure demonstrated superior water-repellency compared to conventional pillar structures of similar dimensions.
  • Stability analysis confirmed the robust nature of the air pillar within the nanoshell.
  • Dynamic droplet tests verified the stable Cassie state under impact.

Conclusions:

  • Geometric design of silicon nanoshell arrays can intrinsically create stable superhydrophobic surfaces.
  • The air pillar within the nanoshell is key to achieving robust water-repellency.
  • This approach offers a promising pathway for developing durable, coating-free superhydrophobic materials.