简介：Tappingmodeatomicforcemicroscopehasbeenappliedtoobservesingle-chainPMMAparticleswhichwerestoredforsixmonthsatroomtemperatureaftersprayedfromverydilutesolutionsingoodsolvents,good/poormixedsolvents,andathetasolvent.Monodis-persePMMAstandardsofmolecularweightsrangingfrom7.90×10~4to1.3×10~6wereusedtoinvestigatetheeffectofmolecularweightohthesizeofthesingle-chainPMMAparticles.Thesesingle-chainparticlesshowedclosetosphericalshapes.Themorphologyofsingle-chainPMMAparticlesofagivenmolecularweightwasfoundtobeidenticalinspiteofdifferentsolventsusedforsolutionspraying.Molecularweighdependenceoftheparticledimensionwasalsofound.Thediametersofsingle-chainPMMAparticlesaftercorrectionoftlp-geometryeffectwerecomparedtothevaluesestimatedfrommolecularweightanddensity.

简介：有100，200和300祷告的链长度的单个聚合物链的结构的转变被平行temperingMD模拟调查。我们的模拟结果能与减少的温度从随机的卷捕获结构的变化到orientationally订的结构。清楚的转变作为温度的功能在旋转和全球orientational顺序参数P的半径的曲线上被观察，它表明了单个聚合物链的结构的形成。在旋转Rgx的方形的半径的三个部件之间的线性关系2，Rgy2，Rgz2并且全球orientational顺序P能在在结构上transformational过程下面被获得。在x之间的线性关系的斜坡(或Y轴)部件Rgx2(或Rgy2)并且P是否定的，当时Rgz，2作为P的功能是积极的。斜坡的绝对值与链长度成正比。一旦单个聚合物链拿随机的卷或订的配置，线性关系是无效的。conformational变化也在显微镜的规模上被分析。聚合物链能被当作由灵活的环连接的僵硬的茎的构造。从茎长度分发的指数地减少的行为的偏差变得突出，显示一链使硬产生导致与减少的温度处于trans状态结束的越来越多的片断。茎长度Ntr是大约21张契约显示聚合物链与特定的褶层长度被订。那么，模拟结果，显示出液体水晶的聚合物链的原型，是有用的理解水晶的聚合物的结晶化过程。

简介：Inthisstudywastoinvestigate,byphase-transfercatalysis,theactivityofsingleandmixedammoniumandphosphoniumsaltsgraftedona"gel-type"styrene-7%divinylbenzenecopolymerintheoxidationofbenzylalcoholwithhydrogenperoxide.Awidevarietyofcatalystswithdifferentquaternarygroupsanddifferentquaternarychainlengthsubstituentswereexamined.Theactivityofsingle"onium"saltsincreasesasaconsequenceoftheassociationofammoniumandphosphoniumsaltsgraftedonthesamepolymericsupport.Theactivityofpolymer-supportedammoniumandphosphoniumsaltsincreaseswiththenumberofcarbonatomscontainedinthealkylradicalsofthe-oniumandofthefunctionalizationdegreewithphosphoniumgroups.

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简介：Asystematicstudyonthesynthesisandantibacterialactivityofthequaternary"onium"saltsgraftedonaninsoluble"gel-type"stryene-7%divinylbenzenecopolymerbypolymer-analogousreactionsisshowed.Antibacterialactivityofquaternaryammoniumand/orphosphoniumsaltsgraftedonpolymer-supportshasbeenstudiedagainststaphylococcusaureusandEscherichiacoli.Awidevarietyof"onium"saltsboundtomacromolecularsupportswithdifferentquaternarygroupsanddifferentquaternarychainlengthsubstituentswereexamined.Theantibacterialactivityofmixed"onium"saltsincreasesasaconsequenceoftheassociationofammoniumandphosphoniumsaltsgraftedonthesamepolymericsupport.

简介：Acyano-substituteddiarylethlenederivativeaggregation-inducedemission(AIE)dyewithtwoaminoend-groupsand4,4'-(hexafluoroisopropylidene)diphthalicanhydridewerefacilelyincorporatedintoredfluorescentorganicnanoparticles(FONs)viaroomtemperatureanhydridering-openingpolymerizationunderanairatmosphere.TheseobtainedRO-HFDAFONswerecharacterizedbyaseriesoftechniquesincludinggelpermeationchromatography,Fouriertransforminfraredspectroscopy,sizedistributionandzetapotentialmeasurements,UV-Visabsorptionspectrum,fluorescentspectroscopyandtransmissionelectronmicroscopy.BiocompatibilityevaluationandcelluptakebehaviorofRO-HFDAFONswerefurtherinvestigatedtoexploretheirpotentialbiomedicalapplication.WedemonstratedthatsuchFONsshowedhighwaterdispersibility,stableuniformsphericalmorphology(150-200nm),broadexcitationband(350-605nm),intenseredfluorescence(627nm)andexcellentbiocompatibility,makingthempromisingforcellimagingapplications.

简介：变形癌症房间的俘获和察觉为恶意的瘤的诊断和治疗是关键的。这里，我们报导folic酸(FA)的使用poly修改了electrospun(乙烯基白酒)(PVA)为癌症房间俘获应用的/polyethyleneimine(PEI)nanofibers。由glutaraldehyde蒸汽的ElectrospunPVA/PEInanofiberscrosslinked与FA被修改经由一poly(乙烯乙二醇)(木钉)分隔符，由纤维表面PEI胺的acetylation列在后面。形成的修改FA的nanofibers很好被描绘。electrospunPVA/PEInanofibers的形态学尽管有表面修正光滑、一致。另外，修改FA的nanofibers显示由溶血证实了的好hemocompatibility试金。重要地，发达修改FA的nanofibers能明确地捕获癌症房间overexpressingFA受体，它被数试金和质的共焦的显微镜学分析的量的房间验证。发达修改FA的PVA/PEInanofibers可以被用于为癌症诊断应用程序捕获传播肿瘤房间。

简介：Twograftingmethods,i.e.solutiongraftingandpre-adsorbing,areintroducedtocovalentlyimmobilizehydrophilicpolymersonsegmentedpolyurethane(SPU)tomodifyitshydrophilicityandtoimproveitscellcompatibility.Solutiongraftingresultsinhigherdegreeofgraftingandroughersurfacemorphology.Cellcultureevaluationdemonstratesthatthemodifiedmembranesthusobtainedaredisadvantageoustotheendothelialcell(ECs)growthprobablybecausethehydrophilicgroupsonthesurfaceareover-crowded.However,pre-absorbinggraftinggenerateslowerdegreeofgrafting,whichisdetectedandconfirmedbyATR-FTIRspectraandwatercontactangle.Scanningelectronmicroscopic(SEM)measurementshowsthatthelattermethodproducesaplaneandsmoothmorphology,whichissimilartotheSPUcontrolsamplecontrolled.Whengraftingwithlowermonomerconcentration,ECscouldgrowonSPU-g-PHEA[poly(2-hydroxyethylacrylate)],SPU-g-PAAm(polyacrylamide),SPU-g-PDMA[poly(2-(dimethylamino)ethylmethacrylate)]orquaternizedSPU-g-PDMAsurfacewithelongatedcellshapes.Hence,thecellcompatibilityofSPUisimprovedandausefulmethodtoconstructacellcompatiblelayeronthepolymersurfacehasbeendeveloped.``

简介：一篇小说溶剂敏感荧光灯有可逆性的致动器从碳点(CD)被获得了反的蛋白石，经由渗入CD答案进胶体的水晶模板的空隙被准备，CD材料的热聚合并且移开胶体的模板。同样准备的CD反的蛋白石致动器显示出75畭s的一个弯曲角度

简介：Theeffectofsinteringdispersedandbulk,lowmolecularweight(Mn=50,000Da),nano-emulsionpolytetrafluoroethylene(PTFE)particlesneartheirmeltingpointisdescribed.Withthenascentparticlesconsistingofca.75nmdiameter,hexagonal,singlecrystals,sinteringat,e.g.,350℃,results,initially,inmergerofneighboringparticles,followedbyindividualmolecularmotiononthesubstrateandtheformationoffoldedchain,lamellarsinglecrystalsandspherulites,andon-edgeribbons.Itissuggestedthesestructuresdevelop,withtime,inthemesomorphic'melt'.Sinteringofthebulkresinyieldsextendedchain,bandstructures,aswellasfoldedchainlamellae;end-surfacetoend-surfacemerger,possiblybyend-to-endpolymerization,occurswithincreasingtime.

简介：PolysaccharidecoatedPLAnanoparticlesbearingaldehydegroupswerepreparedbydialysisofDMSOsolutionofcholesterolhydrophobic-modifieddextranpolyaldehydeandPLAagainstwater.Theaveragediameterofthenanoparticleswasabout160nm,andthesizedistributionwasnearlyhomogenous.ThenanoparticleswerefunctionalizedsimultaneouslywithCD71andEGFRantibodythroughtheSchiff'sbasereaction,andthenradiolabeledwith~(99m)Tc.Afterperfusedtheradiolabelednanoparticlesintotumor-bearing...

简介：Conventionalorganicsolarcell’s(OSC)architectures,includingrigidtransparentsubstrate(Glass),conductiveelectrode(Indiumtinoxide,ITO)andsmallworkingareas,arewidelyutilizedinorganicphotovoltaicfields.However,suchastructureaswellasconventionalspin-coatingmethodobviouslyrestricttheirindustrialapplication.Inthisarticle,wereportthedepositionofsilvernanowires(AgNWs)ontheflexiblesubstratebyslot-dieprinting.TheobtainedAgNWsfilmsexhibitedahightransmittanceandalowresistance,andwerefurtherusedasthetransparentconductiveelectrodeofOSCs.Atypicalconjugatedpolymer,poly[(2,5-bis(2-hexyldecyloxy)phenylene)-alt-(5,6-difluoro-4,7-di(thiophen-2-yl)benzo[c][1,2,5]thiadiazole)](PPDT2FBT),wasusedastheactivematerialtofabricatelarge-area(7cm~2)solarcellsbyaslot-diecoatingprocess.Thepowerconversionefficiency(PCE)couldreach1.87%initiallyandfurtherincreasedto3.04%bythermalannealing.ComparedtotheperformanceofreferencecellonITOsubstrate,theresultindicatedthattheAgNWscouldbedevelopedasanalternativesubstituteofconductiveelectrodetofabricatethelarge-areaflexibleOSCsbyroll-to-rollprinting.