Temperature dependence of electronic

FIGURE 3.3 Temperature dependence of electronic conductivity (cr) of La1 ISrIMn03+d (0 < x 0.7) at pure oxygen (Pq2 = lbar). (From Mizusaki, J. et al., Solid State Ionics,132 167-180, 2000. With permission.)... 

Chidsey CED (1991) Free energy and temperature dependence of electron transfer at the metal-electrolyte interface. Science 251 919-922... 

At room temperature, the temperature dependence of electron and hole mobilities for intrinsic germanium is found to be proportional to for temperature in degrees Kelvin. Thus, a more appropriate form of Eq. (6.31) is... 

Cai Z, Gu Z, Sevilla MD (2000) Electron spin resonance study of the temperature dependence of electron transfer in DNA competitive processes of tunneling, protonation at carbon and hopping. J Phys Chem B 104 10406-10411... 

Fig. 4 Temperature dependence of electron and hole mobilities for durene single crystals (after Burshtein and Williams, 1977)...

Figure 5.2 Tafel plots of In k versus overpotential for a mixed self-assembled monolayer containing HS(CH2)i600C-ferrocene and HS(CH2)isCH3 in 1.0 M HCIO4 at three different temperatures V, 1 °C O/ 25 °C , 47°C. The solid lines are the predictions of the Marcus theory for a standard heterogeneous electron transfer rate constant of 1.25 s-1 at 25 °C, and a reorganization energy of 0.85 eV (= 54.8 kj moh1). Reprinted with permission from C. E. D Chidsey, Free energy and temperature dependence of electron transfer at the metal-electrolyte interface, Science, 251, 919-922 (1991). Copyright (1991) American Association for the Advancement of Science...

Figure 23.3 Temperature dependence of electronic conductivity of EMI - TCNQ (1 1).

Figure 6 The temperature dependencies of electron mobilities of DMDB doped PCZ.

Warman JM, Sauer MC. (1971) The temperature dependence of electron attachment to CCI4, CHCI3 and CjHjCHjCl. Int JRadiat Phys Chem 3 273-282. 

The temperature dependence of electron-transfer rate constants is interesting. In the normal region, it shows an activation energy as predicted from simple Marcus theory. In the inverted region, the activation energy is very small or zero. This agrees with the quantum mechanical version of the theory (Kestner et al., 1974 Fischer and Van Duyne, 1977), which makes it clear that the transition from the upper to the lower surface behaves just like ordinary internal conversion. 

The quadrupole splitting is sensitive to temperature primarily through the valence contribution, which reflects the temperature dependence of electrons between different... 

Khundkar, L. R., Perry, J. W., Hanson, J. E., Dervan, P. B., Weak Temperature Dependence of Electron Transfer Rates in Fixed Distance Porphyrin Quinone Model Systems, J. Am. Chem. Soc. 1994,116, 9700 9709. 

Faltermeier B, Protz R and Maier M 1981 Concentration and temperature dependence of electronic and vibrational energy relaxation of O2 in liquid mixtures Chem. Phys. 62 377-85... 

The experimental = (2.20 0.25) x 10 cm s value of van Sonsbeek et al. agrees well with the previous experimental measurement of Berlande et al. [29] and favours the predictions of the Bates [37] and Pitaevskii [39] theories.The temperature dependence of electron-ion recombination in irradiated helium was also investigated by van Sonsbeek et al. [34]. A summary of their measured two- and three-body recombination rate constants over the temperature range 200-295 K is given in Table 8. The three-body recombination rate constant decreases with increasing temperature, and may be written as... 

Table 11. Temperature dependence of electron-ion recombination rate constants for hydrated hydronium ions Leu et al. [48] in units of 10 cm s ).

Fig. 9.16 Analysis of the conductivity measurements temperature dependence of electronic properties derived for the (Fa)2PFe crystal a of the energy gap 2A at = 2kp, b of the concentration n, c of the mobility [jl, d of the mean scattering time r, and e of the mean free path X of the charge carriers in the...

The major conclusion of this work so far is that the trace inorganics Al Fe and Cu organometallic additives will increase the pyrolysis yield without affecting the mesophase microstructure. Addition of organometallics can either have inhibitory or promotional effects. The prosiotional effect (e.g. Cu) is perhaps due to the termination of radical formation whereas the inhibitory effect (e.g. V and Ni) is due to the initiation of radical formation. This will be studied further using the temperature dependence of electron spin resonance (ESR) studies. 

The semi-classical temperature dependence of electron transfer rate constants has been inferred from Equations (l)-(3). However, it is frequently observed that these equations are more successful at describing the overall behavior of the activation free energy, AG a than that of the component activation enthalpy, and entropy, A5 da, terms. Newton has suggested... 

Chidsey, C. E. D. (1991) Free Energy and Temperature Dependence of Electron Transfer at the Metal-Electrolyte Interface, Science 251, 919-922. 

Temperature dependence of electron mobilities (ji) in TAPQ5 (above) and TAPQ7 (below) crystals, respectively. TDWPD and TDWPD-f correspond to the mobilities from the time-dependent wavepacket dilfusion approach without and with the fluctuations for electronic couplings, expt. represents the measured mobility at 100 °C. 

A similar change in the temperature dependence of electron transport above Tg has been observed in a very dissimilar material, a-Se As alloy.32 However, in chalcogenides, rate heating and cooling in the vicinity ofTg induced a pronounced hysteresis in mobility behavior below T. In this case, relaxation of mobility hysteresis parallels thermostructural relaxation. 

---