Barium titanate and europium-doped barium titanate coatings were applied on diatom frustules using the reflux/evaporation deposition process. The silica-based diatom frustules had to first be converted into magnesia/silicon composite replicas using a gas/solid displacement reaction to render the template chemically compatible with the barium titanate-based coating. Conformal titanate-based coatings were obtained on the magnesia frustule replicas possessing uncontrolled thicknesses and excess inorganic particles using the reflux/evaporation deposition process. The europium-doped barium titanate coated frustules exhibited bright red photoluminescent properties upon stimulation with an ultraviolet light source.Although the LabView program pictured in Figure 2.3(c) seemed straight forward and easy to use (i.e., mouse clicking on the LED buttons simply turned a process on or off), manual control of the order and timing of the pumps was required. Thus , another Figure 2.4: The electrical wiring diagram of the NI USB-6008 31.
|Title||:||Conformal Sol-gel Coatings on Three-dimensional Nanostructured Templates|
|Author||:||Michael R. Weatherspoon|
|Publisher||:||ProQuest - 2008|