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Updated: Jun 18, 2026
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Atomically Traceable Nanostructure Fabrication
Published on: July 17, 2015
Titania nanostructures fabricated by atomic layer deposition using spherical protein cages
Hyunbin Kim1, Eckhard Pippel, Ulrich Gösele
1Max-Plank Institute of Microstructure Physics, Halle D-06120, Germany. hkim@mpi-halle.mpg.de
Langmuir : the ACS Journal of Surfaces and Colloids
|November 26, 2009
Summary
Researchers used the protein apoferritin to create titanium dioxide (TiO2) nanoparticles. This biological templating method allows for controlled synthesis of inorganic nanomaterials for various applications.
Area of Science:
- Nanotechnology
- Materials Science
- Biotechnology
Background:
- Biological systems offer a template for synthesizing inorganic nanomaterials with controlled size.
- Apoferritin, a hollow protein, is a promising candidate for biomimetic nanofabrication.
- Atomic layer deposition (ALD) enables precise control over thin film growth.
Purpose of the Study:
- To investigate the controlled deposition of titanium dioxide (TiO2) using apoferritin as a template.
- To explore the influence of ALD parameters on TiO2 growth within and on apoferritin.
- To synthesize uniform TiO2 nanoparticles with tunable morphology.
Main Methods:
- Apoferritin protein complexes were used as nanoscale templates.
- Atomic layer deposition (ALD) of TiO2 was performed on apoferritin.
- Varying precursor exposure and purge times were employed to control deposition.
- Thermal pretreatment and osmotic dehydration were utilized to modify apoferritin structure.
Main Results:
- Controllable TiO2 deposition on both the outer surface and inner cavity of apoferritin was achieved.
- Nanoparticle morphology (hollow spheres or core-shells) was dependent on experimental conditions.
- Narrow size distribution of TiO2 nanoparticles was observed.
Conclusions:
- Biomimetic synthesis using apoferritin and ALD is a viable method for producing TiO2 nanoparticles.
- This approach offers precise control over nanoparticle size and morphology.
- The resulting TiO2 nanoparticles have potential applications in catalysis, sensing, and biomedical fields.
