Dynamics and Kinetics of Supercooled Liquids under Ultrasonic Field (pp. 103-120)
Authors: (Hiroshi Abe, Department of Materials Science and Engineering, National Defense Academy, Hashirimizu, Yokosuka, Japan)
Abstract: In simple system (metallic sodium, benzene and naphthalene), supercooled states
were investigated by ultrasonic measurements. Frequency dependent shear loss modulus
can detect relaxation process sensitively in the supercooled liquid of metallic sodium.
The dynamic heterogeneity might correspond to a dynamic cluster at the supercooled
state. In contrast to the monatomic system, benzene and naphthalene possess anisotropic
interactions intrinsically due to anisotropic molecular shapes.
The peculiar feature is characterized by a competition between - repulsive
interaction and molecular packing efficiency. On balancing in the local circumstance,
supercooled benzene is coupled with the ultrasonic fields. Furthermore, the ultrasonic
irradiation effect is enhanced by thermal treatments such as quenching. Kinetics during a
non-equilibrium state can extract hidden information about the nucleation process, where
dynamic heterogeneous fluctuations in the supercooled liquids are dominant in