简介:Recentinterestinmobile-basedhealthcarehasdrivensignificantdemandsonresearchingnon-contactelectrodesforelectrocardiogram(ECG)measurement.Whiletheconductivegelachievestherequirementinmakingagoodcontactbetweentheelectrodesandskin,severalproblemsappear.Agel-free,non-contactelectrodebasedoncapacitivecouplingtheorywasprovidedinthispaper,whichwasintegratedontheprintcircuitboard(PCB).TheexperimentalresultsshowedthatclearECGsignalscouldbeacquiredinthelaboratoryconditionsbycouplingtheelectrodestothechestofpatientsthroughcottonbelts.
简介:Theresearchworkonpreparationprocessofactivematerialsoftherareearthionselectiveelectrodesandthevalenceoftheelectrodemembranewerereported.Theactivematerialswerechacterizedbyinfraredspectrum,elementalanalysisandXPS.Wehadstudiedtherareearthionselectiveelectrodesinwhichtheactivematerialsconsistoffunctionalpolymers.Inthispaper,theresearchworkonpreparationprocessandthevalenceoftheelectrodemembranewerereported,whichhasnotbeenseeninliteratureyet.
简介:Inthispaper,wepresentthedevelopmentofflexiblezinc–airbattery.Multiwalledcarbonnanotubes(MWCNTs)wereaddedintoelectrodestoimprovetheirperformance.ItwasfoundthatMWCNTswereeffectiveconductiveadditiveinanodeastheybridgedthezincparticles.Poly(3,4-ethylenedioxythiophene)polystyrenesulfonate(PEDOT:PSS)wasappliedasaco-bindertoenhanceboththeconductivityandflexibility.Apoly(acrylicacid)(PAA)andpolyvinylalcohol(PVA)coatedpaperseparatorwasusedtoenhancethebatteryperformancewherethePVP–PAAlayerfacilitatedelectrolytestorage.Thebatteriesremainedfunctionalunderbendingconditionsandafterbending.Multipledesignoptimizationswerealsocarriedoutforstorageandperformancepurposes.
简介:Posttraumatictremorisoftenoneofthecausesofdisabilityinheadinjurypatients.Usually,pharmacotherapyforthistypeoftremorisnoteffective.Sinceearly1970s,surgicalablationoftheventralthalamushasbeenusedtotreatvarioustypesoftremor.1Nowadays,deepbrainstimulation(DBS)confirmsitsefficacyinalleviatingdifferentformsoftremor,includingposttraumatictremor.2,3Suchtherapyhasbeenreportedachievingaround80%successrateinthetreatmentofposttraumatictremor.
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简介:Activatedcarbons(ACs)withawiderangeofsurfaceareasweremadefrompetroleumcokebymeansofKOHactivation.Theelectrochemicalcharacterizationwascarriedoutforseveralactivatedcarbonsusedaspolarizableelectrodesofelectricdouble-layercapacitors(EDLCs)inanaqueouselectrolyticsolution.Theporousstructuresandelectrochemicaldouble-layercapacitanceoftheactivatedcarbonswereinvestigatedbyvirtueofnitrogengasadsorptionandconstantcurrentcycling(CCC)methods.Therelationshipamongthesurfacearea.porevolumeoftheactivatedcarbonsandspecificdouble-layercapacitancewasdiscussed.ItwasfoundthatthespecificcapacitanceofACsincreasedlinearlywiththeincreaseofsurfacearea.Thepresenceofmesoporesintheactivatedcarbonswithveryhighsurfacearea(>2000m^2/g)wasnotveryeffectiveforthemtobeusedasEDLCs.Theinfluenceofchemicalcharacteristicsoftheactivatedcarbonsonthedoublelayerformationcouldbeconsideredtobenegligible.
简介:Inrecentyears,developmentofhigh-performancesupercapacitorelectrodematerialshasstimulatedagreatdealofscientificresearch.Theelectrochemicalperformanceofasupercapacitorstronglydependsonitsmaterialstructures.Herein,wereportasimplestrategyforhigh-performancesupercapacitorsbybuildingpseudocapacitiveCuSnanosphereswithnanoporousstructures,nanosizedwalls(<10nm)andrelativelylargespecificsurfaceareaof65m~2/g.Thiselectrodedemonstratesexcellentelectrochemicalperformanceincludingamaximumspecificcapacitanceof814F/gat1A/g,significantratecapabilityof42%capacitanceretentionatanultrafastrateof50A/g,andoutstandinglong-termcyclingstabilityatvariouscurrentdensities.Theremarkableelectrochemicalperformanceofas-preparednanoporousCuSnanosphereselectrodehasbeenattributedtoitsuniquestructuresthatplaysakeyroleinprovidingshortionandelectrondiffusionpathways,facilitatediontransportandmoreactivesitesforelectrochemicalreactions.Thisworkshedsanewlightonthemetalsulfidesdesignphilosophy,anddemonstratesthatnanoporousCuSnanosphereselectrodeisapromisingcandidateforapplicationinhigh-performancesupercapacitors.
简介:我们采用nonequilibrium格林的函数方法理论上在一个使变形的分子学习Kondo效果,它被当作一个电子声子相互作用(EPI)系统。为声子部分的自我精力在标准许多身体被计算图解的扩大直到在EPI力量的第二份订单。我们发现多重帮助声子的Kondo卫星除平常的Kondo回声以外产生。在反平行的磁性的配置切开主要Kondo山峰和帮助声子的卫星仅仅发生因为不均匀的点铅couplings,而是它从为平行磁性的配置的对称是免费的。EPI力量和震动的频率能提高主要Kondo和卫星切开的旋转。压制的零偏爱的Kondo回声能被使用一个外部磁场恢复,这被显示出,其大小显著地依赖于phononic效果。尽管在隧道联合的不对称现象没有贡献到Kondo山峰切开的纺纱的恢复,它能缩小需要交换在大否定剧降和大积极山峰之间的通道磁致电阻比率的外部地。
简介:Dielectricbarrierdischarge(DBD)excitatedbypulsedpowerisapromisingmethodforproducingnonthermalplasmaatatmosphericpressure.DischargecharacteristicinaDBDwithsaltwateraselectrodesbyahome-madeunipolarnanosecond-pulsepowersourceispresentedinthispaper.Thegeneratoriscapableofprovidingrepetitivepulseswiththevoltageupto30kVanddurationof70nsata300Ωresistiveload.Appliedvoltageanddischargecurrentaremeasuredundervariousexperimentalconditions.TheDBDcreatedbetweentwoliquidelectrodesshowsthatthedischargeishomogeneousanddiffuseinthewholedischargeregime.Spectradiagnosisisconductedbyanopticalemissionspectroscopy.Theairplasmahasstrongemissionfromnitrogenspeciesbelow400nm,notablythenitrogensecondpositivesystem.
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简介:NanoporousanataseTiO2(np-TiO2)electrodeshavebeendevelopedviatheanodizationoftitaniumfoilsinfluoridecontainingelectrolytes,anditsapplicationinrechargeablelithium-ionbatteries(LIBs)wasinvestigated.Fourdifferenttypesofnp-TiO2electrodeswithdifferentporediametersof14.7±8.2nm,12.8±6.8nm,11.0±5.5,and26.7±13.6nmwerefabricatedforevaluatingtheeffectofnanoporouscharacteristicsontheLIBperformance.Thedischargecapacityofthefourbatterytypes1,2,3,and4were132.7mAhg-1,316.7mAhg-1,154.3mAhg-1,and228.4mAhg-1,respectively.Inaddition,theseelectrodes1,2,3,and4exhibitedreversiblecapacityof106.9mAhg-1after295th,180.9mAhg-1after220th,126.1mAhg-1after150th,and206.7mAhg-1after85thcycleatarateof1C,respectively.Itwasnotedthatthecycliclifeofthebatterieshadaninverserelationship,andthecapacityhadaproportionalrelationshiptotheporediameter.Theenhancedelectrochemicalperformanceofthenanoporouselectrodescanbeattributedtotheimprovedconductivityandtheenhancedkineticsoflithiuminsertion/extractionatelectrode/electrolyteinterfacesbecauseofthelargespecificsurfaceareaofnp-TiO2electrodes.