Relaxation unresolved issues

In Section I we briefly discuss the relationship between the theoretical parameters and experimental observables in these experiments in terms of the spectroscopy of electrons in liquids. Experimental techniques are considered in more detail in Section II, while the data from electron solvation in pure liquids are reviewed in Section III in the context of the molecular dynamics of the host liquid. Section IV presents current results on electron trapping in very dilute polar systems and leads to speculation on mechanisms of electron localization. In Section V the first direct observations of a photoselective, laser-induced electron-transfer process are presented, following which we summarize as yet unresolved issues and speculate on future directions in the laser spectroscopy of electron-relaxation processes. 

In this chapter we have discussed two as yet unresolved issues, finite molecular weight effect and the phase behavior and phase transitions in highly asymmetric block copolymers. We believe that these issues are fundamental enough to require a fresh look, particularly from a theoretical point of view. We do not think that the currently held mean-field theory can explain every conceivable phase behavior and phase transitions experimentally observed in block copolymers. Additionally, most if not all of the physical theories in the literature are based on certain assumptions which were made, more often than not, for the reason of mathematical simplicity. We have suggested that a new theory for phase behavior and phase transitions in block copolymers be developed by relaxing the assumptions made in the formulation of the currently held mean-field theories. 

The physics of ultrathin films is stiU a hot topic presenting several unresolved issues. In the recent years, it has been definitively shown that the development of irreversibly adsorbed layer affects many physical properties of ultrathin films, and likely can be at the origin of some of the not yet resolved problems. In this Chapter we reported clear evidences on the impact of the irreversibly adsorbed layer on the average relaxation dynamics of ultrathin film. This result, in agreement with several others in literature, can shed light in the observed evolution of relaxation time of ultrathin film with annealing above Tg. 

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