纳米尺度点接触热量输运过程的分析

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1、万方数据东南大学硕士学位论文______-_______________--________-______-—————————_一●___—●_—————___H—————————_—____—●—H__-—_—————————__---_-——————————————_-—_——●——————————-___●-————一iSsmallenough，therelationshipbetweenthethermalcontactresistanceandelectricalcontactresistanceagreesapproximatelywell

2、withthatpredictedbytheWiedemann．Franzlaw．However，asthecontact10adincreasescontinuously，themeasuredthermalcontactresistancehasasharpdecrease，andthenremainsnearlyunchanged．Inthatcase，thetheiTnalcontactresistancewilIbemuchlargerthanthetheoreticallypredictedvalue．andtheLorenznumberr

3、angesfrom4to5x10哺WQK～．whichispossiblyduetotheinsulatinglayercoveredonthemicrowires．Basedonthepresentexperimentaltechniques，thethelmophysicalpropertiesofcarbonnanotubefiberswhicharesubjectedtotwisting，acidtreatment，anddopingwithiodineareinvestigated．Theresultsshowthattheintrinsic

4、thermalconductivityofindividualcarbonnanotubesdominatesthetherfflaltransportincarbonnanotubefibers．comparedwiththeInter-tubethermalcontactresistance．Atroomtemperature．thephonon．phononscatteringplaysasignificantroleincarbonnanotubefibers，whiletheeffectofimpurityscatteringiscompar

5、ativelysmaller．TheeffectivethermalconductivityofcarbonnanotubefibersiSfoundtodecreaseexponentiallyasporosityincreasesespeciallywhenporosityissmallerthan0．5．Keywords：crosswisestructure；microwire；thermalcontactresistance；finiteelementsimulation；thermalconductivity，Wiedemann-FranzL

6、awIII万方数据日录目录摘要⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．IAbstract⋯⋯．⋯⋯⋯⋯．．．．．⋯⋯⋯⋯．．⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．．⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．II目录⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．IV第一章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．11．1研究背景及意义⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．11．2研究历史及进展⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一21．2．1理论模型⋯⋯⋯

7、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯21．2．2稳态测量方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．31．2．3瞬态测量方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．31．2．4微纳米尺度下接触热阻测量方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．51．3研究内容及方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．61．3．1理论推导与模型仿真⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一71．3．2装置设计与实验测量⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．71．4内容安排⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

8、⋯⋯⋯⋯⋯⋯⋯⋯⋯．7第二章交叉微米线结构的理论分析⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯