1. A microchannel substrate with a tunable resistive thin layer coating for electron amplification comprising: a microchannel substrate having a front surface and a rear surface, the microchannel substrate including a plurality of channels extending substantially parallel through the substrate between the front surface and the rear surface; a multi-component resistive coating conformally coating the surfaces of the plurality of channels within the microchannel substrate, the multi-component resistive coating characterized by a coating resistivity and a coating thickness, comprising a metal oxide insulating component; a conductive component comprising at least one of a metal, a metal nitride, and a metal sulfide; and an emissive coating conformally coating the multi-component resistive coating, the emissive coating configured to produce a secondary electron emission responsive to an interaction with a particle received by one of the plurality of channels, wherein the coating resistivity is selectively established by a resistive component ratio of the conductive component to the insulating component within the multi-component resistive coating.