Microfluidic Generation of Multifunctional Photonic Crystal Microspheres，第六届亚欧研讨会上处理和性能增强聚合物会议文集（2013.6.2-6 武汉）-中国聚合物网,论文下载

Microfluidic Generation of Multifunctional Photonic Crystal Microspheres

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关键词：

Microfluidic Photonic crystal Microsphere Multifunctionality Self-assembly

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分子表征

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第六届亚欧研讨会上处理和性能增强聚合物会议文集（2013.6.2-6 武汉）

简介：

Duetotheiruniqueopticalproperties,photoniccrystaI(PC)microsphereshaveattractedgreatattention.[1]Uptonow,thereareonlyfewreportsonthepreparationofPCmicrosphereswithmultifunctionality.Thus,itstillremainsachallengetogeneratemonodispersemultifunctionalPCmicrosphereswithhighqualityinafastandfacileway.Wewillpresentthegenerationofhydrogelphotoniccrystalmicrospheres(HPCMs)withinverseopalstructurethroughacombinationofmicrofluidicandtemplatingmethod.Monodispersesilicacolloidalcrystalmicroparticlesarefirstlyobtainedthroughmicrofluidictechniqueandsubsequentsolvent-evaporationprocess.TheobtainedcolloidalcrystalmicroparticlesarefirsttreatedbycalcinationtoconnectthesilicaNPs,andthenrinsedwiththeaquaregiasolutiontoinducehydrophilicgroupsonthesurfaceofthemicroparticles.TemperatureandpHresponsiveHPCMsarethenbepreparedbycopolymerizingthefunctionalmonomerssuchasN-isopropylacrylamide(NIPAm)andmethacrylicacid(MAA).HPCMsnotonlycanshowtunablestructuralcoloralmostcoveringtheentirewavelengthofvisiblelightbysimplycontrollingtemperatureorpH,butcanrealizerapidresponserateduetothedecreasedsizeandwell-orderedporousstructure.Moreover,functionalgroupsorsubstancessuchasazobenzenederivativeormagneticnanoparticlescanfurtherbeintroducedintohydrogelmatrixbyusingpost-treatmentprocess.ThesemultifunctionalHPSMscanrespondtotheUV/visiblelightwithoutsignificantlyinfluencingthetemperatureandpHresponse,thusrealizingmulti-responsivecapabilitywithinonesingleparticle.Thepresenceofmagneticnanoparticlesmayfacilitatetheassemblyandhavepotentialinapplicationofadvanceopticaldevices.Also,weusePS-co-PNIPAMnanoparticlestopreparecolloidalPCswithoutdialysisandionexchangeprocessing.Duetothehydrogenbondingamongthenanoparticles,sphericalhydrogelPCscanbeformedinasimilarfashion.Byvaryingthesizeandvolumefractionofthenanoparticles,structuralcolorsoftheHPCMscanbetuned,broadeningtheirapplicationsinthefieldsofsensing,separationandencoding

作者：

X. L. Jia,J. Y. Wang,J. T. Zhu

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2013-07-04 14:28:31

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