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Updated: Jun 14, 2025

Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars
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Hexagonal Patterns in Diatom Silica Form via a Directional Two-Step Process.

Zipora Lansky1, Diede de Haan1, Yuval Piven1

  • 1Dept. of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, 7610001, Israel.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|September 6, 2024
PubMed
Summary
This summary is machine-generated.

Diatoms create intricate silica cell walls through a directional process. Nanoscale rods elongate first, then connect, forming hexagonal patterns from an initially anisotropic background.

Keywords:
biomineralizationdiatomhexagonal patternmorphgenesissilica

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Area of Science:

  • Biomineralization
  • Cellular morphogenesis
  • Nanotechnology

Background:

  • Organisms exhibit nanoscale material patterning, notably in diatom silica cell walls.
  • Diatom morphogenesis mechanisms are theoretically proposed but challenging to study in vivo.

Purpose of the Study:

  • To investigate the in situ formation process of diatom silica.
  • To visualize silica development within the living cell using advanced microscopy.

Main Methods:

  • Developed an in situ 3D visualization method.
  • Utilized electron microscopy slice-and-view techniques on Stephanopyxis turris.

Main Results:

  • Documented the formation of an isotropic hexagonal pattern with nanoscale pores.
  • Revealed a directional process initiating with silica rod elongation.
  • Observed secondary connection of rods forming a complete hexagonal lattice.

Conclusions:

  • Diatom silica patterns arise from a unified process of rod elongation and branching.
  • Isotropic patterns are formed from an anisotropic background.
  • Future research should focus on rod elongation and branching in diatom morphogenesis.