Abstract

Inorganic colloidal quantum dot systems whose surfaces are coordinated with conjugated organic ligands represent an interesting hybrid system in which the photophysical properties (spectral, temporal, and polarization) are strongly modified with respect to either inorganic or organic component. The presence of semiconducting ligands linked to the nanocrystal surface presents an environment where both energy-and charge-transfer are facilitated by the close (≈ 3.5 nm) center-to-center chromophore spacing. We will discuss highly modified blinking kinetics, enhanced ‘deep-trap’ emission, and a strong linear polarization in both absorption and emission associated with the quantum dot core. These phenomena are studied in individual nanostructures using fluorescence microscopy in combination with scanning probe techniques to relate structure to photophysical characteristics.

© 2008 Optical Society of America

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