Electron inhomogeneous transport

Unlike solid state -stacks, however, double helical DNA is a molecular structure. Here CT processes are considered in terms of electron or hole transfer and transport, rather than in terms of material conductivity. Moreover, the 7r-stack of DNA is constructed of four distinct bases and is therefore heterogeneous and generally non-periodic. This establishes differences in redox energetics and electronic coupling along the w-stack. The intimate association of DNA with the water and counterions of its environment further defines its structure and contributes to inhomogeneity along the mole-... 

DHT may occur over different tryptophan forms in proteins as they quite often have inhomogeneously broadened electronic spectra [31]. A very interesting case of DHT is described between two indole rings in bichromophoric solutes tryptophan dipeptide [32]. Such directed transport allows to correctly interpret spectral properties of dipeptide and other multichromophoric solutes. The theory of inductive-RET in solutions with inhomogeneous spectral broadening is given in Ref. [33]. In more detail, DHT mechanism will be explained in Sect. 2.2 (vide infra). 

The above classification of chemical processes was based on the system s physical chemistry. A similar classification can be applied to electronic processes if we consider the effectively charged structure elements and assume that we can determine extremely small component concentrations or deviations from the stoichiometric composition. The well-known p-n junction process can serve as an example since it is a transport process (including local relaxation) in a single phase, inhomogeneous system. 

Heterophase assemblages of mixed ionic/electronic conductors of the type A/AX/AY/A under an electric load are the simplest inhomogeneous electrochemical systems that can serve to exemplify our problem. Let us assume that the transport of cations and electrons across the various boundaries occurs without interface polarization and that the transference of anions is negligible. For the other transference numbers we then have... 

Besides there are some other reasons for the LSPA band hybridization at binary close-packed arrays. For example, strong inhomogeneity of local fields in nanostructures under consideration changes the behavior of copper and silver valence electrons and makes easy the conditions of the interparticle charge carriers transport. A t th e area of cop per an d s ilver contact th e h ybrid li nks formation becomes possible. As a sum of these factors the modification of... 

Sullivan J. P., Tung R. T., Pinto M. R. and Graham W. R. (1991), Electron transport of inhomogeneous Schottky barriers a numerical study , J. Appl. Phys. 70, 7403-7424. 

Fig. 5. Fluctuating band edges of amorphous semiconductors arising from compositional or structural inhomogeneities. A typical eigenstate near the conduction band edge is shown transport of conduction electrons involves tunneling between neighboring minima or thermal activation.

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