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Damping spectra of LiTaO3 and SiO2 in water. Damping of SiO2 in n-heptane is also shown. It is seen here that SiO2 has no resonance spectrum in water due to its high dielectric constant (≈80). However, SiO2 shows some damping spectra in n-heptane that has dielectric constant of about 1.9. LiTaO3 exhibits suitable resonance in water, demonstrating its ability to work in aqueous phases. Adapted with permission from [45], copyright (2010) Elsevier.
