期刊
JOURNAL OF PHYSICAL CHEMISTRY B
卷 109, 期 18, 页码 8543-8546出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp051062k
关键词
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We have developed a straightforward method for producing a stable, aqueous suspension of hydrophobic, fluorescent pi-conjugated polymer nanoparticles consisting primarily of individual conjugated polymer molecules. Features of the method are the facile preparation, purity, unique optical properties, and small size (similar to 5-10 nm) of the resulting nanoparticles. The results of TEM, scanning force microscopy, and near-field scanning optical microscopy of particles cast from the suspension indicate that the particles are single conjugated polymer molecules. The NSOM results yield estimates of the optical cross-sections of individual conjugated polymer molecules. The UV-vis absorption spectra of the nanoparticle suspensions indicate a reduction in conjugation length attributed to deformations of the polymer backbone. Fluorescence spectra of the aqueous narroparticle suspensions indicate interactions between segments of the polymer chain and intramolecular energy transfer.
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