I will discuss recent two-dimensional colloidal glass experiments from my lab that employ temperature-sensitive microgel particles for easy tuning of the sample volume fraction.  We have probed phonons in these glasses, and we have explored their relation to the mechanical response of disordered solids [1,2].  [1]    Chen, K., Ellenbroek, W.G., Zhang, Z.X., Chen, D.T.N., Yunker, P.J., Henkes, S., Brito, C., Dauchot, O., van Saarloos, W., Liu, A.J., and Yodh, A.G., Low-frequency vibrations of soft colloidal glasses. Physical Review Letters 105, 025501 (2010).[2]    Chen, K., Manning, M.L., Yunker, P.J., Ellenbroek, W.G., Zhang, Z., Liu, A.J., and Yodh, A.G., Measurement of correlations between low-frequency vibrational modes and particle rearrangements in quasi-two-dimensional colloidal glasses. Physical Review Letters 107, 108301 (2011).

Phonons and rearrangments in colloidal glasses

244th National Meeting (2012)

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