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A Facile Way to Fabricate Hybrid Microparticles with Tunable Structures

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關(guān)鍵詞：

Precipitant approach Self-assembly Morphology Amphiphiles

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99K

所屬學(xué)科：

分子表征

來(lái)源：

第六屆亞歐研討會(huì)上處理和性能增強(qiáng)聚合物會(huì)議文集（2013.6.2-6 武漢）

簡(jiǎn)介：

Itiswellknownthat[6,6]-phenylC61butyricacidmethylester(PCBM)isthemostcommonn-typesemiconductormaterialusedinpolymersolarcells,andalmostonlyneedle-likecrystallitewithlengthsoftensofmicrometerscanbeformed.Meanwhile,muchworkaboutthepreparationoforderedstructureswithvariedmorphologieshasbeenreportedbytakingadvantageoftheself-assemblyofamphiphilicmolecules.Wewillintroducetheself-assemblyofamphiphilicmoleculesPCBM-PEGsynthesizedbyattachingethyleneglycol(EG)moleculestoPCBM.Duetoamphiphilicnatureofthispolymer,PCBM-PEGcanself-assembleintovariousmorphologiesinselectivesolvent.Wewillpresentasimpleandefficientroutetoproduceuniqueassembliesthroughtheprecipitationmethod.Inatypicalexperiment,PCBM-PEGwasfirstlydissolvedinagoodsolvent,forexampleN,N-Dimethylformamide(DMF);acertainamountofacetonitrile(apoorsolventforPCBM)wasthendroppedintothesolutionwithstingingstirringtoinducetheself-assemblyofthepolymer.Afteragingforseveraldays,uniqueassembliescanbeobtainedbydroppingadropofthesolutiononasiliconwaferundervarioussolventevaporationconditions.Byvaryingtheratioofgoodsolventtotheselectivesolventandthesolventevaporationrate,uniqueaggregateswithvariedmorphologies(e.g.,sphere,doughnut-like,bowl-likeandslice-likestructures)andsizesrangingfrommicronstonanometerscanbeformed.

作者：

J. Y. Li, R. J. Liang,J. T. Zhu

上傳時(shí)間：

2013-07-04 14:11:30

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