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《ag和agcl納米顆粒的微乳液法制備工藝研究》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、摘要本文采用微乳液法制備Ag和AgCl納米顆粒；同時(shí)，在#l-力n交變電場(chǎng)作用下，采用微乳液法可以制備出不同形貌的Ag和AgCl納米顆粒；最后對(duì)納米顆粒的形貌結(jié)構(gòu)和形成機(jī)理進(jìn)行了初步的探討。用透射電子顯微鏡對(duì)樣品的形貌進(jìn)行了表征，結(jié)果表明，由離子表面活性劑AOT組成的微乳液制得的Ag和AgCl納米顆粒的形貌是球狀且粒徑較為均勻的；由非離子表面活性劑PEG／水溶液組成的溶液體系，通過(guò)調(diào)節(jié)PEG的濃度，制得的納米顆粒的形貌可以由球狀轉(zhuǎn)變?yōu)榘魻?。在交變電?chǎng)作用下，由表面活性劑AOT組成的微乳液體系可以制備出不同長(zhǎng)徑比的棒狀、鏈狀等不同形貌的Ag和AgCl納米顆粒，其納米顆粒的生長(zhǎng)過(guò)程可能有兩種方
2、式：連續(xù)生長(zhǎng)和聚合生長(zhǎng)。用選區(qū)電子衍射(SAED)對(duì)納米顆粒的結(jié)構(gòu)進(jìn)行了表征，結(jié)果表明，連續(xù)生長(zhǎng)的納米顆粒具有單晶結(jié)構(gòu)，聚合生長(zhǎng)的納米顆粒具有多晶結(jié)構(gòu)。整個(gè)研究表明，外加交變電場(chǎng)可以成為一種誘導(dǎo)納米顆粒在微乳液中取向生長(zhǎng)的新手段。關(guān)鍵詞微乳液法：納米顆粒：交變電場(chǎng)；形成機(jī)理燕山大學(xué)工學(xué)碩士論文AbstractInthispaper,AgandAgCInanoparticleswerepreparedbYmicroemulsionsmethod；Meanwhile，AgandAgCInanoparticleswithdifferentconfigurationscouldbesynthesi
3、zedundertheactingofexternalalternatingelectricfield；At1ast，themicrostructureandformationmechanismofnanoparticleswithdifferentconfigurationswereprimarystudied．Theconfigurationsofsamplewerecharacterizedbytransmissionelectronmicroscope(TEM)．TheobservationresultsshowthatconfigurationsofAgandAgClnanopa
4、rticles，whichwerepreparedinmicroemulsioncomposedtheionicsurfactantAOT,werespherical，particlewithsymmetricalsizedistribution；Byadjustingtheconcentrationofnonionicsurfactantpolyethyleneglycol(PEG)inthewater,theshapeofnanoparticles，preparedbytheliquor,couldbechangedfromsphericaltorod—like．AgandAgClna
5、noparticleswitlldifferentconfigurations，suchasrod-likeandchain．1ike，werepreparedinmieroemulsionsusingtheionicsurfactantAOTundertheactingofaltematinglelectricfield．Thegrowthmethodsofnanoparticleswerelikelytotwospecies：continuousgrowthandpolymericgrowth．Themicrostructuresofnanoparticleswerecharacter
6、izedbytheselectedareaelectrondiffraction(SAED)．Theresultsshowthatnanoparticlesincontinuousgrowthweresingle-crystalline，whilethoseinpolymericgrowthwerepoly-crystalline．Baseonourinvestigation，theexternalaltematingelectricfieldcouldbeanewmeanstoinducedthetropisticgrowthofnanoparticlesinmicroemulsions
7、．Keywordsmicroemulsions；nanoparticles；alternatingelectricfield；formationmechanismII第1章緒論納米材料與納米技術(shù)是2l世紀(jì)最具有發(fā)展?jié)摿Φ母咝录夹g(shù)的核心。納米材料是物質(zhì)的基礎(chǔ)和重要組成部分，一般是指組成材料的結(jié)構(gòu)單元的特征緯度尺寸在納米量級(jí)(一般是1～100nm)的固體材料；納米技術(shù)是在納米尺度下探索新材料及其結(jié)構(gòu)在化學(xué)、電學(xué)、磁學(xué)、光學(xué)、
