简介：Polymer-supportedRCpCpTiCl2(Cp=η^5-C5H4;RCp=η^5-RC5H4)havebeenpreparedandreducedbyi-C3H7MgBrinsitu，thenusedincatalyticisomerizationof1,5-hexadiene.Theisomerizationof1,5-hexadieneleadstoamixtureofcyclicandlinearproducts.Theratioofcyclictolinearproductdependsonthenatureofthesupporterandthesubstituentonthecyclopentadienylring.Theformercontributesthemost,forexample,silicasupportedCp2TiCl2gavecyclic-linearratioof99/1,whileforpolymer-supportedCp2TiCl2species,linearcompoundsarethemajorproductsandtheratioofcyclictolinearproductchangeswithdifferentRgroupsonthecyclopentadienylring.

简介：在这份报纸，64公里???铧???鯩????藥?貁裥鲽??匨??濄？？

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简介：在压缩下面的戒指聚合物刷子的一个纹理粗糙的祷告春天模型的分子的动力学模拟被介绍。灵活聚合物刷子在压缩期间总是是混乱的，而semiflexible聚合物刷子趋于在足够地强壮的压缩下面被订。进一步，semiflexible聚合物刷子的聚合物单体密度在刷子表面附近很高，导致表面附近的免费精力的山峰价值。因此，当nanoparticles在semiflexible戒指聚合物刷子被压缩时，他们趋于展出在刷子表面之间的仔细包装的单个层的结构，刺不进的墙，和伪二维的订的结构接近刷子表面在强壮的压缩下面被形成。这些调查结果提供一条新途径给设计应答的应用。

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简介：Wedemonstratedlong-periodgrating(LPG)inscriptiononpolymerfunctionalizedopticalmicrofibersanditsapplicationsinopticalsensing.Opticalmicrofiberswerefunctionalizedwithultraviolet-sensitivepolymethylmethacrylatejacketsand,thus,LPGscouldbeinscribedonopticalmicrofibersviapoint-by-pointultravioletlaserexposure.Fora2mmlongmicrofiberLPG(MLPG)inscribedonopticalmicrofiberswithadiameterof5.4μm,aresonantdipof15dBat1377nmwasobserved.ThisMLPGshowedahighsensitivityofstrainandaxialforce,i.e.,-1.93pm∕μεand-1.15pm∕μN,respectively.AlthoughtheintrinsictemperaturesensitivityoftheLPGsisrelativelylow,i.e.,-12.75pm∕°C,itcanbeincreasedtobe-385.11pm∕°Cbyappropriatesealing.Benefitingfromthesmallfootprintandhighsensitivity,MLPGscouldhavepotentialapplicationsinopticalsensingofstrain,axialforce,andtemperature.

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简介：Wereportasimplesolution-processedmethodforthefabricationoflow-cost,flexibleopticallimitingmaterialsbasedongrapheneoxide(GO)impregnatedpolyvinylalcohol(PVA)sheets.SuchGO–PVAcompositesheetsdisplayhighlyefficientbroadbandopticallimitingactivitiesforfemtosecondlaserpulsesat400,800,and1400nmwithverylowlimitingthresholds.Femtosecondpump–probemeasurementresultsrevealedthatnonlinearabsorptionplayedanimportantrolefortheobservedopticallimitingactivities.Highflexibilityandefficientopticallimitingactivitiesofthesematerialsallowthesecompositesheetstobeattachedtononplanaropticalsensorsinordertoprotectthemfromlight-induceddamage.

简介：Wepresenthereaseriesofperylenediimide(PDI)basedisomericconjugatedpolymersfortheapplicationasefficientelectronacceptorsinall-polymersolarcells(all-PSCs).BycopolymerizingPDImonomerswith1,4-diethynylbenzene(para-linkage)and1,3-diethynylbenzene(meta-linkage),isomericPDIbasedconjugatedpolymerswithparallelandnon-parallelPDIunitsinsidebackboneswereobtained.Itwasfoundthatpara-linkedconjugatedpolymer(PA)showedbettersolubility,strongerπ-πstacking,morefavorableblendmorphology,andbetterphotovoltaicperformancethanthoseofmeta-linkedconjugatedpolymers(PM)did.DevicebasedonPTB7-Th:PA(PTB7-Th:poly{4,8-bis[5-(2-ethylhexyl)-thiophen-2-yl]benzo[1,2-b:4,5-b’]dithiophene-2,6-diyl-alt-3-fluoro-2-[(2-ethylhexyl)-carbonyl]thieno[3,4-b]thiophene-4,6-diyl})showedsignificantlyenhancedphotovoltaicperformancethanthatofPTB7-Th:MA(3.29%versus0.92%).Moreover,thephotovoltaicperformanceofthesepolymericacceptorscouldbefurtherimprovedviaaterpolymericstrategy.Bycopolymerizingasmallamountofmeta-linkagesintoPA,theoptimizedterpolymericacceptorsenabledtoenhancephotovoltaicperformancewithimprovedtheshort-circuitcurrentdensity(Jsc)andfillfactor(FF),resultinginanimprovedpowerconversionefficiency(PCE)of4.03%.

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简介：Electricallyresponsivephotoniccrystalsrepresentoneofthemostpromisingintelligentmaterialcandidatesfortechnologicalapplicationsinoptoelectronics.Inthisresearch,dye-dopedpolymer-stabilizedcholestericliquidcrystals(PSCLCs)withnegativedielectricanisotropywerefabricated,andmirrorlesslasingwithanelectricallytunablewavelengthwassuccessfullyachieved.Unlikeconventionalliquid-crystallasers,theproposedlaseraidedintuningtheemissionwavelengththroughcontrollingthereflectionbandwidthbasedongradientpitchdistribution.Theprincipaladvantageoftheelectricallycontrolleddye-dopedPSCLClaseristhattheelectricfieldisappliedparalleltothehelicalaxis,whichchangesthepitchgradientinsteadofrotatingthehelixaxis,thuskeepingtheheliconicalstructureintactduringlasing.Thebroadtuningrange(~110nm)ofPSCLClasers,coupledwiththeirstableemissionperformance,continuoustunability,andeasyfabrication,leadstoitsnumerouspotentialapplicationsinintelligentoptoelectronicdevices,suchassensing,medicine,anddisplay.

简介：Duetothelackofmodeselectioncapability,singlewhispering-gallery-mode(WGM)lasingisachallengetoachieve.Inbottlemicroresonators,thehighlynondegeneratedWGMsarespatiallywell-separatedalongthelong-axisdirectionandprovidemodeselectionaccordingtotheiraxialmodenumbers.Inthiswork,weusealoss-engineeringapproachtosuppressthehigher-orderWGMsanddemonstratesingle-modelasingemissioninsmallpolymerbottlemicroresonators.ThefibertapersarenotonlyusedtocouplepumplightintothebottlemicroresonatorstoexcitetheWGMsbutalsotobringopticallossesthatareinducedfromthediametermismatchbetweenfibertapersandmicroresonators.Byadjustingthecouplingpositions,thediametersoffibertapers,andthecouplingangles,singlefundamental-modelasingisefficientlygeneratedwithside-modesuppressionfactorsover15dB.Ourloss-engineeringapproachisconvenientjustbymovingthefibertaperandmayfindpromisingapplicationsinminiaturetunablesingle-modelasersandsensors.

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简介：Withthebirthofgraphenewithfasnicatingproperties,noveltwo-dimensionalnanomaterialshaveobtainedconsiderabledevelopmentsinthelastdecade.Amongthem,BNnanosheetshavebeenintensivelyinvestigatedbecauseoftheirlargeelasticmodulus,highmelting-point,superbthermalconductivityandlargedirectbandgap,whichcanbeusedinultraviolet-lightemitter,

简介：Strengtheningreinforcedconcrete(R.C.)beamsusingprestressedglassfiber-reinforcedpolymer(PGFRP)wasstudiedexperimentallyasdescribedinPartⅠofthispaper(Huangetal.,2005).Inthatpaper,R.C.beams,R.C.beamswithGFRP(glassfiber-reinforcedpolymer)sheets,andR.C.beamswithPGFRPsheetsweretestedinbothunder-strengthenedandover-strengthenedcases.Thetestresultsshowedthattheload-carryingcapacities(ultimateloads)ofthebeamswithGFRPsheetsweregreaterthanthoseofthebeamswithoutpolymersheets.Theload-carryingcapacitiesofbeamswithPGFRPsheetsweregreaterthanthoseofbeamswithGFRPsheets.Theobjectiveofthisworkistodevelopananalyticalmethodtocomputealloftheseload-carryingcapacities.ThisanalyticalmethodisindependentoftheexperimentsandbasedonlyonthetraditionalR.C.andP.C.(prestressedconcrete)theory.Theanalyticalresultsaccordedwiththetestresults.ItissuggestedthatthisanalyticalmethodbeusedforanalyzinganddesigningR.C.beamsstrengthenedusingGFRPorPGFRPsheets.

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简介：A2×2cross/barpolymerelectro-optic(EO)routingswitchisproposed,whichiscomposedoftwopassivechannelwaveguidesandtwoactiveEOpolymermicroringswithbendingradiusofonly13.76μm.Detailedstructure,theoryandformulationareprovidedtocharacterizetheoutputpoweroftheswitch.Forobtainingfundamentalmodepropagation,smallbendinglossandphase-matchingbetweenchannelwaveguideandmicroringresonator(MRR)waveguide,thestructuralparametersareoptimizedunderthewavelengthof1550nm.Analysesandsimulationsonoutputpowerandoutputspectraindicatethataswitchingvoltageof5Visdesiredtorealizetheexchangebetweencrossstateandbarstate,thecrosstalkundercrossstateandthatunderbarstateareabout28.8dBand39.9dB,respectively,andtheinsertionlossesunderthesetwostatesareabout2.42dBand0.13dB,respectively.ComparedwithourfourEOswitchesreportedbefore,thisdevicepossessesultra-compactsizeof0.233mm×0.233mmaswellaslowcrosstalkandinsertionloss,andthereforeitcanserveasagoodcandidateforconstructinglarge-scaleopticalroutersorswitchingarraysinphotonicnetwork-on-chip(NoC).

简介：新印离子的聚合物(IIP)被4-vinylpyridine(单体)的copolymerization综合，ethyleneglycoldimethacrylate(cross-linker)和2,2-azobis-isobutyronitrile(开始者)面对Cd2+和quinaldic酸(complexing代理人)。IIP和空白的聚合物的吸附能力分别地是45.0和6.2mgg1，这被发现。为不同二进制混合的印的聚合物的相对选择系数也是计算的。比作非印的聚合物(捏)，IIP为Cd(II)有更高的选择。IIP被使用一个简单的批抽取过程从水样品为镉抽取用作吸着剂。从IIP的Cd2+抽取和它的恢复上的不同参数的效果被使用试验性的设计方法论评估并且优化。优化吸附/解吸附作用过程被申请从真实的水样品的镉移动。获得的恢复证明这IIP能从水样品被用于踪迹镉离子的移动。

简介：与gigapores和meso-macropores包含层次bimodal毛孔结构的多孔的聚合物祷告(PPB)被导致聚合的阶段分离(果仁)和乳剂模板技术在一只杯子里准备毛状的microfluidic设备(GCMD)。制造过程由使乳化包含了water-in-oil乳剂的准备水的答案进包含porogen的单体答案。乳剂被增加进GCMD制作(water-in-oil)-in-water两倍乳剂微滴。搬运人的流动率连续阶段强烈影响了形成机制和微滴的尺寸。从滴下到微滴的jetting和尺寸转变的形成机制随搬运人的流动率的增加从550m减少了到250m连续阶段。准备微滴为聚合被开始由联机对形式PPB紫外照耀。因为从乳剂模板获得的porogen和gigapores的存在，在这些祷告的meso-macropores被果仁产生。毛孔形态学和PPB的毛孔尺寸分发被扫描电子显微镜学和水银侵入porosimetry(MIP)广泛地调查。因为在乳剂和搬运人的水阶段之间的不同osmolarities，新毛孔形态学在与传统的理论不同的祷告的边被形成连续阶段。bimodal毛孔结构的形态学和比例能被改变porogen的类型和数量调节。

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