An optical reader system and method are described herein that can detect a lateral andor angular misalignment of one or more biosensors so that the biosensors can be properly re-located after being removed from and then reinserted into the optical reader system. The present invention is characterized in that the method comprises: providing a substrate; forming, in sequence from substrate up, a transparent electrode, a luminescent layer, and an opposed electrode; and forming a drying film by providing a raw material composed of barium, magnesium or calcium to react with a gaseous reactant composed of oxygen on the surface of the opposed electrode. When channel allocation has to be performed by path multiplexing on the mobile terminal device which has sent the channel establishment request, control unit permits channel establishment in accordance with a result of detection of an error detecting unit. Furthermore, a tilted part 115b is formed as the step surface of the step 115. In another example, if the original analog block provides the analog output having the middle value, the output of the original analog block is provided as an output of the voter circuit. The present invention is also directed to methods for preparing the BITZnO complexes, to BITZnO complexes prepared by the novel methods, to methods for using the BITZnO complexes to inhibit microbial growth or reduce the level of bacteria on the surface of a substrate, and to substrates protected from microbial attack by being treated with the BITZnO complexes.