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Seeded-Growth of Silica Rods from Silica-Coated Particles.

Douglas R Hayden¹, Chris L Kennedy¹, Krassimir P Velikov^1,2,3

¹Soft Condensed Matter, Debye Institute for Nanomaterials Science , Utrecht University , Princetonplein 1 , 3584 CC Utrecht , The Netherlands.

Langmuir : the ACS Journal of Surfaces and Colloids

|October 26, 2019

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Researchers developed a general silica rod synthesis method for diverse colloidal particles. This technique enables the creation of complex, hybrid, and asymmetrical particle structures for advanced material applications.

Area of Science:

Materials Science
Nanotechnology
Colloid Chemistry

Background:

Seeded growth of silica rods offers a versatile route to complex particle structures.
Current limitations restrict this technique to a narrow range of colloidal materials.

Purpose of the Study:

To develop a general synthesis for silica rod growth from various colloidal particles.
To demonstrate the versatility of this method using different core materials.

Main Methods:

Developed a general silica-on-silica seeded growth method.
Applied the method to silica-coated fluorescent, metallic, and organic core particles.
Investigated the assembly of resulting silica rod particles into supraparticles.

Main Results:

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Successfully synthesized silica rods from silica-coated particles with diverse cores (fluorescein, Ag, PS latex).
Demonstrated the generality and applicability of the seeded-growth technique.
Showcased the formation of supraparticles from the synthesized silica rod particles.

Conclusions:

The developed general synthesis enables silica rod growth from a wide array of silica-coated colloidal particles.
This method facilitates the creation of complex particle architectures with tunable properties.
The technique holds potential for fabricating advanced hybrid materials and functional supraparticles.