Reducing Strain and Fracture of Electrophoretically Deposited CdSe Nanocrystal Films. II. Postdeposition Infusion of Monomers

Thick electrophoretically deposited (EPD) films of ligand-capped colloidal nanocrystals (NCs) typically crack when removed from the deposition solvent due to the loss of residual solvent. We report the suppression of fracture in several micrometers thick EPD films of CdSe NCs by treating the wet, as...

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Bibliographic Details
Published in:The journal of physical chemistry. B 2013-02, Vol.117 (6), p.1544-1549
Main Authors: Kramer, Theodore J, Kumar, Sanat K, Steigerwald, Michael L, Herman, Irving P
Format: Article
Language:English
Subjects:
Cadmium selenides
Deposition
Fracture mechanics
Intermetallics
Monomers
Nanocrystals
Polymerization
Solvents
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Summary:Thick electrophoretically deposited (EPD) films of ligand-capped colloidal nanocrystals (NCs) typically crack when removed from the deposition solvent due to the loss of residual solvent. We report the suppression of fracture in several micrometers thick EPD films of CdSe NCs by treating the wet, as-deposited films with solutions of polymer precursor monomers, followed by UV-initiated polymerization. The monomers diffuse into voids and, for several monomers, dissolve the NCs to form a uniform dispersion in the film.
ISSN:1520-6106
1520-5207
DOI:10.1021/jp305608f