UV Sterilization Using Microplasa ArraysPortable Water ：紫外线杀菌采用微等离子体阵列的便携式水

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1、UV Sterilization Using Microplasma ArraysECE 445 Final PresentationAmanda Chang and Leo Hua, Group 27TA: Ran HuApril 28, 2006OutlinenIntroductionnObjectivesnDesign & FabricationnTestingnDevice PerformancenConclusionsIntroductionnMicrodischarge technology at the U of InLighting and biomedical applica

2、tionsnCost-effectiveness and efficiencyPhotos courtesy of http:/lope.ece.uiuc.edu/research/microcavity.htmObjectivesnApply thin-layered plasma generation devices towards ultraviolet generation for sterilization purposesnExpand previous projects into the ultraviolet spectrumnIncrease the size of disc

3、harge arrays while maintaining stable operationDesign & FabricationOriginal DesignPreparing Electrodesn0.3 M Oxalic acidn50 V, 15Glass Paste(Proprietary Information Removed)Device Assembly(Proprietary Information Removed)TestingTestingnUnpackaged DevicesnVerify effective fabrication process nEvaluat

4、e qualitative behavior of devicenI-V CharacteristicsTest SetupDevice PerformanceDevice #1(Proprietary Information Removed)Device #2(Proprietary Information Removed)Device #2: I-V CurvesEmission SpectraArgon/N2 GasNeon GasDevice #3nFirst packaged devicenQuartz slide provided better uniformitynDevice

5、damaged during UV tests due to high fields around the gas inlet holeDevice #4nSurrounded hole with epoxy for protectionnNew method of applying epoxy to increase flatnessnTape and epoxy firstnQuartz slidenDevice burnt at top edge during UV testDevice #5nHole separated from meshnIntensity measurements

6、 with NeonnElectrode damaged during testingDevice #5: Voltage vs. IntensityDevice #6(Proprietary Information Removed)Device #6: I-V GraphDevice #6: Output AnalysisDevice #6: Efficiency AnalysisnEfficiency of Commercial Neon Lamp .01%ConclusionsSuccesses & ChallengesnAluminum flatnessnHeat treatmentn

7、New epoxy procedureImproved Design(Proprietary Information Removed)Recommendations(Proprietary Information Removed)Ethical ConsiderationsnPossible Health RisksnUV radiation can be harmful to the eyes and skin especially at lower wavelengths (UV-C)ThanksnSung-Jin Park, visiting professor and mentornGary Eden, Director of the Optical Physics and Engineering LaboratorynRan Hu, ECE 445 TAnKwang-Soo Kim, graduate assistant