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Preparation of Functional Silica Using a Bioinspired Method
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Different dimensional silica materials prepared using shaped block copolymer nanoobjects as catalytic templates.

Dongdong Yao1, Yongming Chen, Renhua Jin

  • 1Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-2-7 Rokkakubashi, Yokohama 221-8686, Japan. rhjin@kanagawa-u.ac.jp.

Journal of Materials Chemistry. B
|April 9, 2020
PubMed
Summary

Researchers developed a versatile method to create diverse silica nanoobjects, including hollow spheres and tubes, using polymer templates. This technique offers a general approach for fabricating various inorganic nanoparticles with controlled shapes.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemistry

Background:

  • Fabricating inorganic nanoparticles with controlled shapes is crucial for advanced applications.
  • Existing methods often require harsh conditions or lack versatility in shape control.

Purpose of the Study:

  • To develop a general and adaptable approach for synthesizing silica nanoobjects with diverse morphologies.
  • To utilize diblock copolymer nanoobjects as both templates and catalysts for silica formation.

Main Methods:

  • A sol-gel reaction of tetramethoxysilane (TMOS) was induced by poly(2-(dimethylamino)ethylmethacrylate) (PDMAEMA) shells of diblock copolymer templates.
  • The process occurred in water dispersions under near-neutral pH and ambient conditions.
  • Calcination at 650 °C removed organic components, yielding pure silica nanoobjects.

Main Results:

  • A series of silica nanoobjects with sheet-like, tubular, and hollow spherical shapes were successfully fabricated.
  • The resulting polymer@silica hybrids exhibited a high silica content (approx. 70 wt%).
  • Characterization confirmed the formation and structure of diblock copolymers, polymer nanoobjects, hybrids, and final silica structures.

Conclusions:

  • The reported methodology provides a general and efficient route for synthesizing shape-controlled silica nanoobjects.
  • This approach is adaptable for creating various inorganic nanoparticles with different geometric shapes.
  • The use of polymer@silica hybrids offers a pathway to high-purity inorganic nanomaterials.