Computer-aided Modeling of Porous Electrodes with an Immobilized Enzyme: Substrates with a Partially Regular Structure

Abstract

In porous electrodes with an immobilized enzyme the substrate must have a high specific surface area, which must be accessible to landing onto it a maximum number of enzyme molecules. These demands are not easy to meet. Conceivable are limiting versions as follows: a “stochastic” substrate, where substrate particles (SP) are distributed in the volume randomly, and a “regular” substrate, where SP are distributed strictly regularly. Both versions of the organization of SP have advantages and disadvantages; therefore, in the paper studied is a third, intermediate, version, specifically, substrates with a partially regular structure. Shown is that there exists an optimum of values of fractal dimensionality for a regular base of a substrate, where, by somewhat sacrificing the amount of active enzymes, one can attain a considerable ease of the process of landing enzymes on the surface of a porous substrate. Calculations also show that of practical interest may be a porous substrate with a purely regular structure.