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Covalent Coupling of Nanoparticles with Low-Density Functional Ligands to Surfaces via Click Chemistry.

ABSTRACT: We demonstrate the application of the 1,3-dipolar cycloaddition ("click" reaction) to couple gold nanoparticles (Au NPs) functionalized with low densities of functional ligands. The ligand coverage on the citrate-stabilized Au NPs was adjusted by the ligand:Au surface atom ratio, while maintaining the colloidal stability of the Au NPs in aqueous solution. A procedure was developed to determine the driving forces governing the selectivity and reactivity of citrate-stabilized and ligand-functionalized Au NPs on patterned self-assembled monolayers. We observed selective and remarkably stable chemical bonding of the Au NPs to the complimentarily functionalized substrate areas, even when estimating that only 1-2 chemical bonds are formed between the particles and the substrate.

SUBMITTER: Rianasari I

PROVIDER: S-EPMC3588066 | biostudies-literature | 2013 Feb

REPOSITORIES: biostudies-literature

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Covalent Coupling of Nanoparticles with Low-Density Functional Ligands to Surfaces via Click Chemistry.

Rianasari Ina I de Jong Michel P MP Huskens Jurriaan J van der Wiel Wilfred G WG

International journal of molecular sciences 20130207 2

We demonstrate the application of the 1,3-dipolar cycloaddition ("click" reaction) to couple gold nanoparticles (Au NPs) functionalized with low densities of functional ligands. The ligand coverage on the citrate-stabilized Au NPs was adjusted by the ligand:Au surface atom ratio, while maintaining the colloidal stability of the Au NPs in aqueous solution. A procedure was developed to determine the driving forces governing the selectivity and reactivity of citrate-stabilized and ligand-functional ...[more]

PMID: 23434666

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