准一维半导体纳米材料制备及其性能的研究

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1、摘要本文以制备薪型凇一维绒米结构半譬体树料为主要孽懿。在深入了解鏊痰终零领域瓣秘骚袋聚熬基疆上，对簸豫锌耪糕教及瑗传镑释辩夔准一维纳米结构懿制备及冀性能避彳亍了研究。采用无催化剂的简蚺热蒸发的方法，成功地合成了多种形态的氧化锌准一维纳米结构和硫化锌掺锰的纳米线和纳米带。我们制备的氧化锌纳米结构主要形态包括：纳米莲蓬、纳米塔、绒洙棒杵、纳米白菜、纳米铜钱、纳寒餐、绫寒蓰获嚣秽弹簧等。逶过扫攘黩浚对吝舞形貔透露了彩貔表经势辩其各自的生长机制避行了探讨。在所制备的氧化锌纳米结构形态中最为新颖的是纳米莲滋，这是我们首次制备成功的。扫描

2、电子显微镜分析表明：纳米莲蓬分别在衬底和纳米桥上取向生长，整体团簇赢径较大，平均为2¨m左右，纳米桥的厚度也奁t岬左右，僵是维裁霆簇懿续米捧积缡涞镑兹壹径却缀，l、，平均在70nln左右。x瓣线褥射谱耜喇曼教射谱分辑袭鞠它髓都是绝麓缀商静沿。轴方向高度取向生长的纤锌矿结构晶体。我们对氧化锌纳米越蓬的场发射性能和光学性能进行了测试，’惊奇地发现其具有非常优越的场发射综合性能：最大电流密度，高达12．4mA／cm2，与电子场发射效攀耀关的r／僮瞧疑遮9。27％，这些鄹逡远毫予其它形虢豹氧往箨续米结构，豫筵之多}还爨窍玩较燕豹开癌电

3、场、壤篷毫场和较筒的场发射放大豳予鼻。开启电场和域德电场分别为3．4v／¨m和7．3V，uma关键潺：准一缍霸岽绪稳；螽撵毫镜分耩；氯往锌缀米莲蓬；藏囊二锌掺锰纳米线和缣米带；场发射往鼹燕山大学工学颂士学位论文AbstractThemainpurpOSCofthisdissertationistOsynthesizenovelquasi-one—dimensionalsemiconductingnano—materials．Basedonthedeepunderstandingtotheresearchworkinthisar

4、ea，weinvestigatedthesynthesismethodofthequasi··one-dimensionalnanostructureandproperitiesforZnOandZ鞋S．Thequasi··one··dimensionalnano—structuresofZnOwithvariousmorphologiesandMn-dopedZnSnanowiresandnanobeltswithpeculiarmorphologyinlargequantitiesweresuccessfullysynth

5、esizedViacatalyst-freethermalevaporation．ThesynthesizedZnOnanostructuresinclude：nano*lotus—seed—pods，nano·tovcers，nano—magic-pestles，nano一-Chinese·cabbages，nano-copper-cash，nano·tubes，nano-pectinate-ringsandsprings，etc。．Thevariousmorphologies,vverecharacterizedbysca

6、nningelectronicmicroscopeandtheirgrowthmechanismswerediscussedrespectively．ZnOnano—lotus—seed-podstructureisthemostnovelnanostructureamongthenanostructuresobtained，andissuccessfullysynthesizedforthefirsttimeintheworld．Thescanningelectronicmicroscopeanalysedindicated

7、thatthelotus-seed—podsorientationallygrowonthesiliconsub．rateandonthenanobridges。拍eaveragediameteroftheZnOnanostructuresiS2um．Thelotus-seed-podZnOstructureswereformedbynanorodsarrayswiththeaveragediameterof70姗．TheanalysesofXRDandRamanspectrashowthattheyarehighpurity

8、ZnOcrystalswithwurtzitenanostructuregrownalongc-axis．Wemeasuredthefield—emissionpropertiesandPLpropertiesoftheZnonano·lotus-seed-podsandsu