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12:33
Origami Inspired Self-assembly of Patterned and Reconfigurable Particles
Published on: February 4, 2013
Shape-controlled platinum nanocubes and their assembly into two-dimensional and three-dimensional superlattices
A Demortière1, P Launois, N Goubet
1Laboratoire des Matériaux Mésoscopiques et Nanométriques, UMR 7070, Universite Pierre et Marie Curie-Paris 6, 4 place Jussieu 75252 Paris Cedex 05, France.
The Journal of Physical Chemistry. B
|September 27, 2008
Summary
Researchers synthesized platinum nanocrystals with cubic shapes using liquid-liquid phase transfer. These precisely controlled nanocrystals self-assembled into ordered 2D and 3D supracrystals, forming simple cubic or face-centered cubic structures.
Area of Science:
- Materials Science
- Nanotechnology
- Physical Chemistry
Background:
- Controlling nanocrystal morphology is crucial for advanced material properties.
- Platinum nanocrystals are vital in catalysis and electronics.
- Self-assembly of nanoparticles into ordered structures is a key goal in nanoscience.
Purpose of the Study:
- To synthesize platinum nanocrystals with controlled cubic morphology.
- To investigate the self-assembly of these nanocrystals into supracrystals.
- To establish a novel synthesis route for shape-controlled platinum nanocrystals.
Main Methods:
- Liquid-liquid phase transfer synthesis.
- Tuning nucleation and growth parameters.
- Utilizing capping agents and bromide anions for shape control.
Main Results:
- Achieved synthesis of platinum nanocrystals with cubic and truncated cubic morphologies.
- Demonstrated the role of capping agent length and bromide anions in controlling crystal facets.
- Observed self-assembly into ordered 2D and 3D supracrystals (simple cubic and face-centered cubic).
- Obtained well-faceted supracrystals up to 10 micrometers in size.
Conclusions:
- Liquid-liquid phase transfer enables precise synthesis of cubic platinum nanocrystals.
- Controlled nanocrystal shape and size lead to ordered supracrystal formation.
- This method offers a new pathway for producing high-quality, shape-defined nanocrystal superstructures.
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