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水热合成氧化锌纳米结构的气体传感应用

中文摘要第3-5页
ABSTRACT第5-7页
LIST OF ABBREVIATIONS第12-13页
1 INTRODUCTION AND LITERATURE REVIEW第13-47页
    1.1 INTRODUCTION第13-14页
    1.2 METAL OXIDE ZNO SEMICONDUCTOR第14-18页
        1.2.1 Crystal structure of Zn O第14-15页
        1.2.2 Growth directions of Zn O structures第15-16页
        1.2.3 Electrical Properties第16-17页
        1.2.4 Physical Properties第17页
        1.2.5 Benefits of Zinc Oxide第17-18页
    1.3 SYNTHESIS TECHNIQUES第18-24页
        1.3.1 Solid–vapor Method第18-19页
        1.3.2 Chemical vapor deposition (CVD)第19-21页
        1.3.3 Hydrothermal method第21-24页
    1.4 CHARACTERIZATION OF MATERIAL STRUCTURE第24-25页
    1.5 METAL OXIDE SEMICONDUCTOR GAS SENSORS第25-36页
        1.5.1 Selection of MOS for gas sensing applications第27-28页
        1.5.2 Gas-sensing mechanism of metal oxide semiconductors第28页
        1.5.3 Gas sensor mechanism models第28-34页
        1.5.4 Metrics in Gas Sensor第34-36页
    1.6 GAS SENSOR FABRICATION AND DETECTION METHOD第36-41页
        1.6.1 Pedestal and sensor assembling第36-38页
        1.6.2 Gas-sensing test chamber第38-41页
    1.7 RESEARCH ON METAL OXIDE SEMICONDUCTOR ZNO IN THE FIELD OF GASSENSORS第41-44页
        1.7.1 Doped Zn O for gas-sensing application第42-44页
    1.8 THESIS ORGANOGRAM第44-47页
        1.8.1 The main research contents of the present work第44-45页
        1.8.2 The main research purpose of the present work第45-47页
2 Preparation of Zn O nanodisks using hydrothermal method andsensing to reductive gases第47-53页
    2.1 INTRODUCTION第47页
    2.2 SYNTHESIS OF SOLUTION第47页
    2.3 RESULTS AND DISCUSSIONS第47-50页
        2.3.1 Characterization parameters第47-48页
        2.3.2 Structural characterization第48-50页
    2.4 GAS SENSING PROPERTIES第50-52页
        2.4.1 Sensing mechanism第50-52页
    2.5 CONCLUSIONS第52-53页
3 SURFACTANT DEPENDENT GROWTH ON TWINNED ZNONANODISK第53-61页
    3.1 INTRODUCTION第53页
    3.2 EXPERIMENTAL第53-54页
        3.2.1 Chemicals第53页
        3.2.2 Preparation第53-54页
    3.3 RESULTS AND DISCUSSIONS第54-58页
        3.3.1 Structural analysiss第54页
        3.3.2 Morphology characterization第54-57页
        3.3.3 Structure evolution mechanism第57-58页
    3.4 CONCLUSIONS第58-61页
4 EMBEDDED ZNO NANORODS AND GAS-SENSINGPROPERTIES第61-69页
    4.1 INTRODUCTION第61页
    4.2 EXPERIMENTAL第61-62页
    4.3 RESULTS AND DISCUSSION第62-65页
        4.3.1 Structural characterizations第62页
        4.3.2 Morphological characterization第62-63页
        4.3.3 Effect of urea in the nucleation of nanostructures第63-65页
    4.4 GAS-SENSING PROPERTIES第65-68页
        4.4.1 Secondary adsorption mechanism第65页
        4.4.2 Response comparison of ethanol and formaldehyd第65-68页
    4.5 CONCLUSIONS第68-69页
5 A SIMPLE PREPARATION OF ZNO NANOCONES ANDEXPOSURE TO FORMALDEHYDE第69-75页
    5.1 INTRODUCTION第69页
    5.2 SYNTHESIS PROCEDURE第69-70页
        5.2.1 Chemicals第69页
        5.2.2 Basic solution preparation第69-70页
    5.3 RESULTS AND DISCUSSIONS第70-72页
        5.3.1 Structural analysis第70页
        5.3.2 Morphological analysis第70-71页
        5.3.3 Effect of PVP in the formation of nanocones第71-72页
        5.3.4 Effect of PVP in the formation of nanocones第72页
    5.4 GAS-SENSING PROPERTIES第72-73页
    5.5 CONCLUSIONS第73-75页
6 POLYMER-ASSISTED CO-AXIAL MULTI-LAYEREDCIRCULAR ZNO NANODISKS第75-83页
    6.1 INTRODUCTION第75页
    6.2 EXPERIMENTAL第75页
    6.3 RESULTS AND DISCUSSION第75-79页
        6.3.1 Structural analysis第75-76页
        6.3.2 Morphology characterization第76-77页
        6.3.3 Effect of polymer hydrocarbons in the layering of circular disk第77-78页
        6.3.4 Effect of SDS in the formation of reverse micelles第78-79页
    6.4 GAS-SENSING PROPERTIES第79-81页
    6.5 CONCLUSIONS第81-83页
7 EFFECTS OF REACTION TIME ON THE MORPHOLOGICAL, STRUCTURAL, AND GAS SENSING PROPERTIES OF ZNONANOSTRUCTURES第83-93页
    7.1 INTRODUCTION第83页
    7.2 EXPERIMENTAL第83-84页
    7.3 RESULTS AND DISCUSSIONS第84-85页
        7.3.1 Structural analysis第84页
        7.3.2 Materials characterization第84-85页
    7.4 GROWTH MECHANISM第85-87页
        7.4.1 Effect of ethanol amine in the transformation of nanostructures第86-87页
    7.5 BAND GAP ENERGIES第87-88页
    7.6 GAS SENSING PROPERTIES AND MECHANISM第88-92页
    7.7 CONCLUSIONS第92-93页
8 SUMMARY AND RECOMMENDATIONS FOR FUTURE WORK第93-95页
    8.1 SUMMARY第93-94页
    8.2 RECOMMENDATIONS FOR FUTURE WORK第94-95页
ACKNOWLEDGEMENTS第95-97页
REFERENCES第97-113页
APPENDIX第113-116页
    A. PUBLICATIONS第113-115页
    B. CONFERENCES ATTENDED第115-116页
    C ACHIEVEMENTS第116页
    D PROJECT FUNDS第116页

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