Electrically Induced Shear Waves in Colloidal Crystals

✍ Scribed by Maria Stoimenova; Vassil Dimitrov; Tsuneo Okubo

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 206 KB
• Volume: 184
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1996.0600

✦ Synopsis

with the distinction of the acoustic modes, paying particular The static light scattering method is used for the detection of attention to the transverse phonons. Since the longitudinal acoustic waves induced in colloidal crystals and liquids by lowmode is of a more general character, it will be considered frequency electric pulses. The method is sensitive to both density in a separate paper.

and shear modes and can be applied for the study of the liquidcrystalline phase transitions. At low fields the variations of light scattering intensity follow both the amplitude and the phase varia-METHODS AND SAMPLES tions of the wave motion and enable the determination of resonance parameters, hence of viscoelastic parameters of the colloidal

The electro-optic observations on the acoustic modes were system.