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Network Covalent Solids02:18

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Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
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Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars
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Robust diamond meshes with unique wettability properties.

Yizhou Yang1, Hongdong Li, Shaoheng Cheng

  • 1State Key Laboratory of Superhard Materials, Jilin University, Changchun, 130012, PR China. hdli@jlu.edu.cn.

Chemical Communications (Cambridge, England)
|February 5, 2014
PubMed
Summary
This summary is machine-generated.

Robust diamond meshes exhibit exceptional superhydrophobic and superoleophilic properties, enabling efficient water-oil separation across a wide pH range. These materials offer controllable, reversible wetting behaviors for advanced applications.

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Nanotechnology

Background:

  • Developing advanced materials for efficient liquid separation is crucial.
  • Superhydrophobic and superoleophilic surfaces offer unique properties for fluid manipulation.
  • Controlling surface wettability is key for various technological applications.

Purpose of the Study:

  • To fabricate robust diamond meshes with tunable superhydrophobic and superoleophilic characteristics.
  • To investigate the stability and recyclability of these properties across a broad pH range.
  • To demonstrate the application of these meshes in efficient water-oil separation and droplet transference.

Main Methods:

  • Fabrication of diamond meshes.
  • Characterization of surface properties (superhydrophobicity, superoleophilicity).
  • Testing of water-oil separation efficiency and droplet transference at varying pH levels.
  • Evaluation of material recyclability.

Main Results:

  • Successfully fabricated robust diamond meshes exhibiting excellent superhydrophobic and superoleophilic properties.
  • Demonstrated stable superhydrophobicity for water across the entire pH range (1-14) with good recyclability.
  • Achieved reversible switching between superhydrophobicity and hydrophilicity.
  • Showcased highly efficient water-oil separation and controlled water pH droplet transference.

Conclusions:

  • The fabricated diamond meshes present a robust and versatile platform for liquid manipulation.
  • The controllable and stable superwettability makes these materials promising for advanced separation technologies.
  • These diamond meshes offer a practical solution for efficient water-oil separation and pH-dependent droplet handling.