Data type character varying

Electrochemical reactions at semiconductor electrodes have a number of special features relative to reactions at metal electrodes these arise from the electronic structure found in the bulk and at the surface of semiconductors. The electronic structure of metals is mainly a function only of their chemical nature. That of semiconductors is also a function of other factors acceptor- or donor-type impurities present in bulk, the character of surface states (which in turn is determined largely by surface pretreatment), the action of light, and so on. Therefore, the electronic structure of semiconductors having a particular chemical composition can vary widely. This is part of the explanation for the appreciable scatter of experimental data obtained by different workers. For reproducible results one must clearly define all factors that may influence the state of the semiconductor. 

Equation (37) has either one or three solutions for x, at given m and p. Depending on the number of solutions, the form of the surface < (m, x) varies, as does the character of the solution of the diffusion equation of type (4), generalized to the case of two coordinates, m, x. However, in view of the present state of experimental data, a full analysis of all these questions seems premature. 

However, as data have accumulated it has become apparent that varies with structure. First, the appropriate value for aromatic cations is probably greater than that for aromatic anions (Carrington et al., 1959). Secondly, the values for CHg, CH2CH3, and CH(CH3)2 are, respectively, 23-04, 24-35, and 26-20 G (Fessenden and Schuler, 1963). Thirdly, Fischer (1965a) has found that in radicals of the type CH3CH—X, the value of depends on the polar character of the group X results are as follows ... 

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