Spectroscopic study reveals discrete emission spectra in silver nanoparticle aggregates, confirming electron energy quantization predicted by spherical quantum-well models.
A direct manifestation of electron energy quantization in metal nanoparticles is observed in two-photon excited luminescence. Experiments reveal the discrete spectra in broadband anti-Stokes photoluminescence from aggregates of silver colloid particles. A theory based on a spherical quantum-well model for metal nanoparticles is in good agreement with experimental observations.
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Drachev et al. (2004) studied this question.
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