Staged Surface Patterning and Self-Assembly of Nanoparticles Functionalized with End-Grafted Block Copolymer Ligands.
Angew Chem Int Ed Engl
; 58(27): 9269-9274, 2019 Jul 01.
Article
em En
| MEDLINE
| ID: mdl-31050140
ABSTRACT
Using two orthogonal external stimuli, programmable staged surface patterning and self-assembly of inorganic nanoparticles (NPs) was achieved. For gold NPs capped with end-grafted poly(styrene-block-(4-vinylbenzoic acid)), P(St-block-4VBA), block copolymer ligands, surface-pinned micelles (patches) formed from NP-adjacent PSt blocks under reduced solvency conditions (Stimulusâ
1); solvated NP-remote P(4VBA) blocks stabilized the NPs against aggregation. Subsequent self-assembly of patchy NPs was triggered by crosslinking the P(4VBA) blocks with copper(II) ions (Stimulusâ
2). Block copolymer ligand design has a strong effect on NP self-assembly. Small, well-defined clusters assembled from NPs functionalized with ligands with a short P(4VBA) block, while NPs tethered with ligands with a long P(4VBA) block formed large irregularly shaped assemblies. This approach is promising for high-yield fabrication of colloidal molecules and their assemblies with structural and functional complexity.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article