简介:Quartzcrystalmicrobalance(QCM)andcyclicvoltammetry(CV)wereusedtocharacterizethemonolayerofcytochromec(Cytc),whichwasadsorbedongoldfilmmodifiedwithalkanethiolmixedmonolayer.AdirectcomparisonofproteinsurfacecoveragescalculatedfromQCMandcyclicvoltammetricmeasurementsillustratesthattheratiooftheelectroactiveCytctothetotalsurface-confinedCytcis34%,whichsuggeststhattheorientationisamainfactoraffectingtheelectroactivityofCytc.Moreover,surfaceplasmonresonance(SPR)measurementcombinedwithCV'insitu'wasusedtoinvestigatetheconformationalchangeofCytcintheredoxprocess.Besides,Aunanoparticles(AuNPs)wereadsorbedonthesurfaceofCytc.TheresultindicatesthatAuNPspromoteelectrontransferbetweenCytcandthegoldelectrode,andSPRresultsuggestsAuNPsenhanceSPRsignal.
简介:Aimingattheproblemthatthereisn'tanystandardizedcalibrationmethodfortheperformanceindexofsurfaceplasmonresonance(SPR)sensor,thecalibrationmethodforkeyperformanceindicesofSPRsensorissummarizedandproposedbasedonthecomparisonofrelativemethodsanddefinitionofeachindex.Experimentaldataofsucrosesolutionswithvariousconcentrationsareobtainedbytheself-buildingSPRinstrument,andthenthecalibrationmethodisusedtodeterminetheperformanceindices,suchasnoise,drift,sensitivity,resolution,linearity,dynamicrangeandreproducibility.Experimentalresultsshowthatthedefinitionofindicesisreasonable,andthecalibrationmethodiscorrect,whichhasgreatsignificanceforperformanceevaluationofSPRsensor.
简介:摘要:随着社会经济的不断发展,建筑行业也在不断发展,装配式施工成为了主要发展方向,其不但可以实现绿色施工,还是建筑行业实现产业化发展的重要基础。对于以往的外墙保温施工方式而言,存在很大的问题和弊端,会增加火灾安全隐患,但是应用SPR复合保温外模板系统,可以根本性提高施工效果,降低安全事故发生概率,促进建筑行业的可持续发展。
简介:摘要:SPR超细无机纤维具有保温绝热性、整体性、吸声降噪性、不燃性、抗阻尼性、复杂结构适应性、安全环保性等性能,是一种新的建筑节能保温材料。SPR复合保温外模板施工实现了保温板与模板一体化,安装、锚固后进行现浇外墙混凝土施工,实现免拆外模板、省去后续安装保温板的施工步骤,装配式施工效果显著,大大加快了整体施工进度,期望通过本文的研究能够为同类工程提供借鉴参考。
简介:WedesignaD-shapedfiberopticbiosensorbasedonthesurfaceplasmonresonance(SPR)ofametal-graphenelayerandsimulatethisSPRusingthefiniteelementmethod.Usingametal-graphenelayerasthesensingmaterial,surfaceplasmaresonanceissimulatedastherefractiveindexoftheexternalenvironmentrangesfrom1.33to1.36.Simulationresultsshowthatametal-graphenelayerattachedtotheD-shapedopticalfibercorecancouplewithlightunderaspecificpolarizationstateandexcitestrongplasmaoscillationsonthelayersurface.Calculatedtransmissioncoefficientsshowthattheresonancewavelengthobviouslymovestowardlongerwavelengthsastherefractiveindexofthetestmediumincreases,andasensitivityof5400nm/RIUisobtained.Becauseofitslargesurfacevolumeratioandgoodbiocompatibility,graphenemaybeutilizedinmanyapplicationsinthefieldofbiosensing.
简介:分别采用LPR-SC-MS/TE法制备一种亚波长结构金属薄膜:铜纳米线/金属膜复合结构。在这种复合结构中,铜纳米线平行镶嵌于金属膜中。利用光学显微镜和紫外分光光度计分别对复合结构膜的形貌及光学吸收特性进行研究发现:采用LPR-SC-MS/TE法制备的铜纳米线/金属复合结构膜中仅同质的铜纳米线/铜膜复合结构在656nm波长处出现一个明显的SPR共振吸收峰,而异质的复合结构在可见光范围内未出现SPR共振吸收峰。