简介：IntroductionThin-layerspectroelectrochemicalmethodhasmanyuniqueadvantages,thereforethismethodhasbeenwidelyappliedanddeveloped.Recentlylighttransparentthinlayerspectroelectrochemicalcellswithvarioustypesofstructureshavebeenreportedathomeandabroadwithgoldorplatinumminigridsastheworkingelectrodeinmostof

简介：Polyvinylalcoholcoatedmagneticparticles（PVAferrofluids）havebeensynthesizedbychemicalco-precipitationofFe（Ⅱ）/Fe（Ⅲ）saltsin1.5mol/LNH4OHsolutionat70℃inthepresenceofPVA.Theresultantcolloidalparticleshavecore-shellstructures,inwhichtheironoxidecrystallitesformthecoresandPVAchainsformtheshells.Thehydrodynamicdiameterofthecolloidalparticlesisintherangeof108to155nm,whichincreaseswithincreasingPVAconcentrationfrom5wt%to20wt%.Thesizeofthemagneticcoresisca.5～10nm,whichisrelativelyindependentofPVAconcentration.Undertransmissionelectronmicroscopic（TEM）examination,themagneticcoresexhibitsomewhatirregularshapesvaryingfromspherical,oval,tocubic.MagnetometrymeasurementrevealedthatthePVAcoatedmagneticparticlesaresuperparamagnetic.Thesaturationmagnetizationof5wt%and20wt%PVAferrofluidsat300Kis54and49emu/g.respectively.AllthePVAferrofluidsexhibitedexcellentcolloidalstabilityinpurewaterandphosphatebuffersaline（PBS,pH=7.4）.Theferrofluidscanremainstableinabovesolutionsformorethanthreemonthsat4℃.

简介：Fromanordinarycondition,usingafullthree-dimensionalmodeltheoryandaninfiniteperturbationexpansionmethod,anexactsolutionofthere-flectioncoefficientforthecoatednarrowstripe-geometryopticalwaveguidedeviceshasbeenderived.Allsixcomponentsandthevectorpropertyoftheelectroma-gneticfieldhavebeenconsidered.Theresultsaresuitableforthesymmetricandasymmetricwaveguides.

简介：Anewandaninexpensiveadsorbentofchitosancoatedsilicaforimmobilizedmetalaffinitychromatography(IMAC)wasstudied.Afteradoublecoating,thechitosancoatedonsilicabeadscouldbeupto53.4mg/gsilicabeads.WhenpH>3.8,themetalligandCu^2+waschelatedonthecoatedchitosanwithaboundcapacityof14.6mg/gchitosanwithoutintroducingiminodiaceticacid(IDA).

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简介：Physicalandchemicalpropertiesofthemagneticnanoparticlescoatedwitholeatehavebeeninvestigatedbymeansoftransmissionelectronmicroscopy(TEM),thermogravimetricanalysis(TGA),Mossbauerspectroscopy,superconductingquantuminterferencedevice(SQUID)magnetometry,infraredspectra(IR)andthecontactangledevice.TheresultsshowthatdopedAlionsinFe3O4nanoparticlesarelocatedontheoctahedralsitesofthespinelstructure.Oleateiscoatedonthemagneticnanoparticleswithtwolayersbychemicalabsorbing,theouterlayercanbewashedaway.Thewettingofthesurfaceofmagneticnanoparticlescoatedwithmonolayerhasbeenchangedfromhydrophilicitytohydrophobicity,andthenanoparticlescanbedispersedverywellinsomeorganicsolutions.

简介：ThelifeofimpregnatedBa-Wcathodeswithanewconstructionhavebeenevaluatedusinganacceleratedlifetestatthreedifferenttemperatures(1170℃,1130℃,1090℃)andconstantcurrentdensity(2A/cm~2).Accordingtotherelationshipoflifewithoperatingtemperatures,anacceleratedequationhasbeensetup.Thecathodelifeatnormaloperatingtemperatureisdeductedbasedontheacceleratedequation.Theresultsshowthatlifeofthenovelcathodeexceeds190,000houratacurrentdensityof2A/cm~2.

简介：Regeneratedcellulosefilmswithwater-resistancewereobtainedbyanimprovedmethodofpreparingcellulosecuoxamsolutionfrompulpsofagriculturalwastes(linters,wheatstraw,reedandBamao).Experimentalresultsshowedthatthemechanicalpropertiesofboththedry.andwetfilmswereexcellent.DatafromIR,SEMandtensilestrengthmeasurementsimpliedthatthesignificantimprovementofwater-resistanceofthefilmswasduetothecohesionbetweenthethinTungoilcoverswithhydrophobicityandtheregeneratedcellulosefilms.Thefilmswerecompletelybiodegradedafterbeingburiedinsoilfor100days.Thetransmittanceofthefilmsderivedfromlinterandreedinvisiblebandrangewere80-90%.

简介：OwingtorecentprogressoflongYBCOcoatedconductors,coilswoundofYBCOconductorswillbedevelopedinnearfuture.ComparedwithcoilswoundofLTSconductom,coilswoundofHTSconductorsoperatedathighertemperaturearehardtobequenched.However,measuresforquenchprotectionarestillnecessary.EspeciallyYBCOcoatedconductorsthataremadebydepositionofthinYBCOfilmonNibasedalloysubstratessuchasHastelloytapesarehighlyresistivewhentheyarequenched,Therefore,

简介：Injectablenanoparticlecarrier,poly(ethyleneglycol)-coatedpoly(ethylcyanoacrylate)hasbeenpreparedbyasimplemethod.AtFirst,synthesizingPEGmacromonomerofpoly(ethyleneglycol)monomethyletherwithacryloylchloride,thengraftcopolymerofpoly(ethylcyanoacrylate)andpoly(ethyleneglycol)wasyieldbyfreeradicalpolymerizationofethylcyanoacrylatewithPEGmacromonomerintoluenesolvent.CharacterizationofthecopolymerhasbeenperformedbyFTIR,1H-NMRandGPCanalysis.Nanoparticleswereeasilypreparedfromtheobtainedamphiphiliccopolymer.

简介：Amodelwasdevelopedtosimulatethetemperaturedistributionandnuggetformationduringresistancespotwelding(RSW)ofzinc-coatedsteels.Itemploysacoupledthermal-electrical-mechanicalanalysissimulatingthedynamicRSWprocess.Temperature-dependentthermal-electrical-mechanicalmaterialpropertieswereconsideredincludingcontact-resistance.Thecontactareawasdeterminedfromacoupledthermal-mechanicalanalysis.Alayeroftransitionelementswasusedtorepresentthechangeofcontactareabykillingoractivatingelements.Theheatgenerationandtemperaturefieldwerecomputedinacoupledthermal-electricalmodel.Alltheseanalysesweresolvedusingthecommercialfiniteelementmethod(FEM)basedonANSYScode,andsomeadvancedfunctionswereusedbywritingaparagraphofcodesbytheauthors.Comparedwiththeresultsfromonlycoupledthermal-electricalmodelinwhichcontactareawasuniformduringthewholeprocess,theresultmatchesbettertotheexperimentalresults.

简介：Agraphene-coatedmicrofiber(GCM)-basedhybridwaveguidestructureformedbywrappingmonolayergraphenearoundamicrofiberwithlengthofseveralmillimetersispumpedbyananosecondlaserat~1550nm,andmultiordercascadedfour-wave-mixing(FWM)iseffectivelygenerated.Byoptimizingboththedetuningandthepumppower,suchaGCMdevicewithhighnonlinearityandcompactsizewouldhavepotentialforawiderangeofFWMapplications,suchasphase-sensitiveamplification,multi-wavelengthfilter,all-opticalregenerationandfrequencyconversion,andsoon.

简介：从在无限的声学的媒介沉浸的有限的圆柱的壳的健全放射上的多重顺从的层的效果被学习。转移矩阵在多层的system.With的每个邻近的接口根据连续边界条件被导出壳理论和声学的波浪方程，理论模型被开发估计声音的特征放射。声学的放射力量减小的数量作为波浪速度或顺从的层减少的密度增加的数字计算结果表演，和使用的多层的系统能比相应一致单身者在噪音减小上是更有效的层。

简介：Thetransmissionspectrumofthecoatedphase-shiftedlong-periodfibergratings(LPFGs)withsingleandmultiplephaseshiftsisanalyzedbythecoupled-modetheoryandthetransfermatrixmethod,andtheinfluencesofthefilmparametersonthespectralcharacteristicsarealsostudied.ItisshownthattheseparameterswillaffecttheLPFGfilteringcharacteristics.Thelosspeakoftransmissionspectrumdecreaseswiththeincreaseoffilmthickness,andthepeakpositionshiftswiththefilmrefractiveindex.Comparedwiththenon-coatedphase-shiftedLPFG,thecoatedonehasthesimilardesirablefilteringcharacteristics,andithasaflexibleabilitytoadjustthetransmissionproperties.

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简介：Aninvestigationonthedischargecharacteristicofadielectricbarrierdischarge(DBD)devicewascarriedoutusingbareandZnO-coatedaluminadielectriclayerinatmosphericpressureair.HighlyconductiveZnOfilmwasfirstdepositedonthealuminasurface,andthecharacteristicsofthedielectricbarrierdischargewereexaminedandcompared.ExperimentalresultshowsthatdischargebehaviorwasdefinitelyimprovedinthecaseofZnO-coateddielectricbarrierdischarge.Relevantexplanationisofferedtodescribeitsdischargephysics.

简介：Effectofstackingstructureofsingle-walledcarbonnanotubes（SWCNTs）onitsperformanceaselectrodeofsupercapacitorwasinvestigatedinthepresentwork.ConsideringSWCNTseasilyformedbundlesduetostrongvandeWaalsattractionbetweentubes,weproposedfirstdispersionofSWCNTsbyionicliquids（ILs）of1-ethyl-3-methylimidazoliumtetrafluoroborate（EMIMBF4）,followedbyfabricationofbuckypaperbycompression.ThedebundlingeffectofILsonSWCNTsincreasedtheinterfacebetweenelectrodeandelectrolyte,decreasedelectricalresistance,and,consequently,increasedperformanceofthesupercapacitor.SinceILs,usedtodisperseSWCNTs,alsofunctionedaselectrolyteinsupercapacitor,ourmethodisasimplewaytopreparebuckypaperelectrodewithhighperformance.

简介：Anα-cyclodextrin(α-CD)incorporatedcarbonnanombe(CNT)-coatedelectrodewasfabricatedandappliedtothesimultaneousdeterminationofdopamine(DA)andepinephrine(EP).Ithasbeenfoundthatthemodifiedelectrodeshowsstrongcatalyticeffectsontheelectro-separationofDAandEP,andthecathodicpotentialdifferencebetweenDAandEPisabout390mV.ThereducingpeakcurrentisproportionaltoDAandEPconcentrationsintherangeof2.0×10^-6-1.0×10^-3and1.0×10^-6-1.0×10^-3mol·L^-1,respectively.Theirdetectionlimitscanreach1×10^-6and5×10^-7mol·L^-1,respectively.Becausetheoxidationofascorbicacid(AA)isanirreversiblereactioninα-CD/CNTfilm,theinterferenceofAAindeterminationofDAandEPiseliminated.

简介：Inthispaper,wederivetheanalyticalexpressionforthemultipoleexpansioncoefficientsofscatteringandinteriorfieldsofagraphene-coateddielectricparticleundertheilluminationofanarbitraryopticalbeam.Byusingthisarbitrarybeamtheory,wesystematicallyinvestigatetheopticalforcesexertedonthegraphene-coatedparticlebyafocusedGaussianbeam.Viatuningthechemicalpotentialofthegraphene,theopticalforcespectracouldbemodulatedaccordinglyatresonantexcitation.Thehybridizedwhisperinggallerymodeoftheelectromagneticfieldinsidethegraphene-coatedpolystyreneparticleismoreintensivelylocalizedthanthepurepolystyreneparticle,whichleadstoaweakenedmorphology-dependentresonanceintheopticalforces.Theseinvestigationscouldopennewperspectivesfordynamicengineeringofopticalmanipulationsinopticaltweezersapplications.