A stylus-based data storage and access system is disclosed. The inner conduit has a main outlet at an aft end thereof, and a row of radial apertures spaced upstream from the outlet. Methods of making nanoemulsions and inactivating pathogenic microorganisms are also provided. A sliding mechanism slides the middle sheet with respect to the first and second outer sheets so that the light impairing zones are moved between a first and second position. Transistors may be used to permit or prevent current from flowing through the visual status indicators.