Abstract
Quantum confinement effects on the excitonic transitions in CdS quantum dots embedded in the polymer matrix Nafion are studied using the technique of photoacoustic spectroscopy. The characteristic blueshift in the absorption onset with decreasing quantum dot size is in agreement with that observed in the optical absorption spectra. Excitonic transitions are better resolved in the photoacoustic spectra when compared to the corresponding optical absorption spectra. The results are discussed in relation to existing theoretical models.
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