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Full-Text Articles in Engineering
Fabrication Of Mwcnt Based Gas Sensor Using Site-Selective Growth Of Nanotubes On Gold Patterned Silicon Oxide Substrate, Srikanth Durgamahanty
Fabrication Of Mwcnt Based Gas Sensor Using Site-Selective Growth Of Nanotubes On Gold Patterned Silicon Oxide Substrate, Srikanth Durgamahanty
University of Kentucky Master's Theses
Growth confinement techniques for multi walled carbon nanotubes on Au/SiO2 surfaces was studied and incorporated into a gas sensor design. A device framework was conceived and a sensor was built to achieve this structure. The fabrication results were analyzed using scanning electron microscopy which confirmed the achievement of highly site-selective growth of carbon nanotubes, exclusively between the interdigitated electrodes. The sensor was then evaluated for its capacitance and conductance response when exposed to NO2 gas. Variation in sensitivities with frequency and flow rate were analyzed. A mathematical model was derived for such a device structure and the predictions …
Optimization Of Coagulation And Syneresis Processes In Cheesemaking Using A Light Backscatter Sensor Technology, Tatiana Gravena Ferreira
Optimization Of Coagulation And Syneresis Processes In Cheesemaking Using A Light Backscatter Sensor Technology, Tatiana Gravena Ferreira
University of Kentucky Master's Theses
Curd syneresis, a critical step in cheesemaking, directly influences the quality of cheese. The syneresis process is empirically controlled in cheese manufacturing plants. A sensor technology for this step would improve process control and enhance cheese quality. A light backscatter sensor with a Large Field of View (LFV) was tested using a central composite design over a broad range of cheese process conditions including milk pH, calcium chloride addition level, milk fat to protein ratio, temperature, and a cutting time factor (β). The research objectives were to determine if the LFV sensor could monitor coagulation and syneresis steps …