Towards a Tetravalent Chemistry of Colloids

Details Towards a Tetravalent Chemistry of Colloids Towards a Tetravalent Chemistry of Colloids

2002-06-28

arxiv.org/abs/cond-mat/0206552v2

Physics

Condensed Matter

Replaced to improve figures. 4 figures Nano Letters

Scientific paper

We propose coating spherical particles or droplets with anisotropic nano-sized objects to allow micron-scale colloids to link or functionalize with a four-fold valence, similar to the sp3 hybridized chemical bonds associated with, e.g., carbon, silicon and germanium. Candidates for such coatings include triblock copolymers, gemini lipids, metallic or semiconducting nanorods and conventional liquid crystal compounds. We estimate the size of the relevant nematic Frank constants, discuss how to obtain other valences and analyze the thermal distortions of ground state configurations of defects on the sphere.

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