TY - GEN
T1 - Dynamic crossover in complex systems
T2 - 3rd International Symposium on Slow Dynamics in Complex Systems
AU - Sokolov, Alexei
AU - Novikov, Vladimir
N1 - Publisher Copyright:
© 2004 American Institute of Physics.
PY - 2004/4/30
Y1 - 2004/4/30
N2 - In this contribution we present an overview of experimental data on dynamic crossover in various molecular and polymeric liquids, van-der-Waals, ionic, covalent and hydrogen bonded systems. We demonstrate that the structural relaxation time t measured at TD has nearly the same value, t(Td)~10-7±1 sec, for different glass-forming systems. We speculate that decoupling of various relaxation processes observed at TD might be the reason for failure of time-temperature superposition known for polymers. We demonstrate that the dynamic transition in biological macromolecules follows the scenario known for the dynamic crossover in glass forming liquids. Moreover, our analysis reveals that Td observed in dynamics of proteins is close to Td of pure solvents. We speculate that the solvent's dynamic crossover controls the dynamic transition of proteins. In other words, proteins and DNA are "slaves" of a solvent and this might open ways for a control of their biochemical activity.
AB - In this contribution we present an overview of experimental data on dynamic crossover in various molecular and polymeric liquids, van-der-Waals, ionic, covalent and hydrogen bonded systems. We demonstrate that the structural relaxation time t measured at TD has nearly the same value, t(Td)~10-7±1 sec, for different glass-forming systems. We speculate that decoupling of various relaxation processes observed at TD might be the reason for failure of time-temperature superposition known for polymers. We demonstrate that the dynamic transition in biological macromolecules follows the scenario known for the dynamic crossover in glass forming liquids. Moreover, our analysis reveals that Td observed in dynamics of proteins is close to Td of pure solvents. We speculate that the solvent's dynamic crossover controls the dynamic transition of proteins. In other words, proteins and DNA are "slaves" of a solvent and this might open ways for a control of their biochemical activity.
UR - http://www.scopus.com/inward/record.url?scp=33744469900&partnerID=8YFLogxK
U2 - 10.1063/1.1764221
DO - 10.1063/1.1764221
M3 - Conference contribution
AN - SCOPUS:33744469900
T3 - AIP Conference Proceedings
SP - 533
EP - 540
BT - Slow Dynamics in Complex Systems
A2 - Tokuyama, Michio
A2 - Oppenheim, Irwin
PB - American Institute of Physics Inc.
Y2 - 3 November 2003 through 8 November 2003
ER -