SnAg纳米粒子的尺寸控制及其机制-论文.pdf

《SnAg纳米粒子的尺寸控制及其机制-论文.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、TransaetionsofNonferrousMetals爨Av锯ai帮mla；bleonSlinecaite、^n^，、^c，．secieDnceidrierect．ctornSocietyofChinaELERPressTrans．NonferrousMet．Soc．China24(2014)750卜_757WWWtl~msc．c／1SizecontrolanditsmechanismofSnAgnanoparticlesWei．pengZHANG，，ChangdongZOU2，，Bing．geZHAO，，Qi-jieZHAI，Y

2、u—laiGAO，1．LaboratoryforMicrostructures，ShanghaiUniversity，Shanghai200436，China；2．SchoolofMaterialsScienceandEngineering，ShanghaiUniversity，Shanghai200072，China；3．InstituteofResearchofIronandSteel，Zhangjiagang215625，ChinaReceived17April2013；accepted7May2013Abstract：Sn3．5

3、Ag(massfraction．％、nanoparticlesweresynthesizedbyanimprovedchemicalreductionmethodatroomtemperature．1．10．phenanthrolineandsodiumborohydridewereselectedasthesurfactantandreducingagent，respectively．ItwasfoundthatnoobviousoxidationofthesynthesizednanoparticleswastracedbyX—ra

4、ydiffraction．Inaddition，theresultsshowthatthedensityofprimaryparticlesdecreaseswithdecreasingtheadditionrateofthereducingagent．Moreover,theslightparticleagglomerationandslowsecondaryparticlegrowthcanresultinsmall—sizednanoparticles．Meanwhile．thee伍0ctofsurfactantconcentra

5、tionontheparticlesizecanefectivelybecontrolledwhenthereducingagentisaddedintotheprecursoratanappropriaterate．Insummary,thecappingefectcausedbythesurfactantmoleculescoordinatingwiththenanoclusterswillrestrictthegrowthofthenanoparticles．Thelargerthemassratioofthesurfactant

6、totheprecursoris．thesmallertheparticlesizeis．Keywords：Sn3．5Ag；sizecontrol；nanoparticles；chemicalreductionmethoddevelopedtechnologywasdirectcurrentarcmethod，1IntrOductiOnwhichwassuccessfuIlyappliedinvariousmetalsandalloys[12，13]．Inparticular,chemicalreductionmethodNano．si

7、zedmaterialshaveattractedmoreandmoreoftheoxidation-reductionreactionamongionsintheat-tentioninbothscienceandtechnologyfieldsrecently．solutionwaswidelyusedinexperimentalstudiesBecauseoftheirinfinitesimalsizes，nanoparticles『2—4，14，151．possessmanyuniquepropertieswhicharedif

8、erentfromSn_Agbasednanoparticles。whichwereconcernedthoseoftheircorrespondingbulkmaterials，suchasinourst