简介:摘要:本文提出一种基于锥形异质芯结构的高灵敏度光纤表面等离子体共振(Surface plasmon resonance, SPR)折射率传感器。实验结果表明,折射率灵敏度在1.33 ~ 1.43范围内呈非线性递增,待测溶液折射率越接近光纤折射率,增长速率越快。当折射率为1.43时灵敏度最大可达8135.5 nm/RIU。平均灵敏度为3762.3 nm/RIU,是传统异质芯结构的1.25倍。
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。