Hybrid organic–inorganic nanomaterials based on polythiophene dendronized nanoparticles

Rigoberto C. Advincula

    Research output: Contribution to journalArticle

    56 Citations (Scopus)

    Abstract

    In this work, the synthesis, characterization, and applications of branched oligothiophene dendrons that act as electroactive surfactants for the capping of Au metal nanoparticles and CdSe quantum dots are described. Two distinct methods have been employed for synthesis: a ligand exchange process and a direct-capping synthesis approach. The coverage of the dendrons per nanocrystal, the nature of the surface coordination interactions, and energy transfer interactions were studied in detail using UV-vis absorbance, FT-IR, AFM, TEM, and photoluminescence spectroscopy. The competition/displacement in ligand metathesis is highlighted by the size of the dendron and nature of binding on semiconductor nanocrystals. In the other system using the direct capping method, the size of the Au nanoparticle is mediated by the dimensions of the ligand, i.e. alkyl chain spacer and dendron branching or size. These hybrid dendron/nanoparticle complexes are generally very soluble and stable in non-polar solvents. They exhibit energy transfer, surface plasmon resonance effects, and photoinduced charge transfer interactions between the metal/semiconductor and conjugated ligands. Adsorption on mica and graphite surfaces was observed. A one-layer photovoltaic cell was fabricated to demonstrate the potential for device applications.

    Original languageEnglish
    Pages (from-to)2778-2784
    Number of pages7
    JournalJournal of the Chemical Society. Dalton Transactions
    Issue number23
    DOIs
    Publication statusPublished - 2006 Jun 5

    ASJC Scopus subject areas

    • Chemistry(all)

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