Photophysics and aggregation effects of a triphenylamine-based dye sensitizer on metal-oxide nanoparticles suspended in an ion trap
Viktoras Dryza, Jessica L Nguyen, Tae-Hyuk Kwon, Wallace WH Wong, Andrew B Holmes, Evan J Bieske
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | ROYAL SOC CHEMISTRY | Published : 2013
The photophysical behaviour of a triphenylamine-based organic dye sensitizer (Carbz-PAHTDTT) attached to alumina and titania nanoparticles (labelled Carbz-Al and Carbz-Ti, respectively) is examined in the absence and presence of the chenodeoxycholic acid (CDCA) coadsorber. The experiments are conducted in vacuo by suspending the target dye-sensitized nanoparticles within a quadrupole ion trap, where they are probed with laser radiation to obtain emission spectra and time-resolved excited state decay curves. For Carbz-Al, the dye's emission band is blue-shifted and the excited state lifetime is increased upon the coabsorption of CDCA, effects attributed to reduced dye aggregation. Compared to..View full abstract
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Awarded by Australian Research Council
This research was supported under the Australian Research Council's Discovery Project funding scheme (Project Number DP110100312 and DP120100100). VD acknowledges an Australian Renewable Energy Agency Postdoctoral Fellowship and support from the University of Melbourne's Early Career Researcher Grant Scheme. The picosecond laser was kindly provided by K. P. Ghiggino and T. A. Smith. VD would also like to thank S. Mathew (Ecole Polytechnique Federale de Lausanne) for helpful discussions regarding the Carbz-NP preparation.