10.1007/s11448-008-3004-2

Abstract

Two new nonlinear optic effects are observed in crystalline solutions of fullerenes in toluene and carbon tetrachloride. Both are provided by a self-clustering of the solute molecules and are referred to fullerene-enhanced Raman scattering and solvent-enhanced luminescence. The effects are induced by the excitation of chargetransfer states of the fullerene nanoclusters, which makes the latter act as amplifiers of local electric fields.

Fullerene-cluster amplifiers and nanophotonics of fullerene solutions

“…As for the polarizable object, recently observed spectral features [4] have shown that clusters of fullerenes provide the entity. The clusters consist of spatially separated molecules connected by weak intermolecular interaction.…”

“…Enhanced luminescence and enhanced Raman scattering were the main targets of our investigations. The first success has been achieved when studying spectral properties of fullerenes I, II, and III in toluene solutions [4]. Figure 2 shows the emission spectra of the three solutions which differ in the efficacy of the sol-sol clusterization.…”

“…Recently, two new spectral events in diluted C 60 -based fullerene solutions have been observed, namely, fullerene enhanced Raman scattering (FERS) and solvent enhanced luminescence (SEL) [4]. Both effects were attributed to a self-clustering of fullerene molecules and photoexcitation of charge-transfer states of the formed nanoclusters was suggested to be responsible for clusters acting as amplifiers of local electric fields.…”