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毛细管微电极制备参数优化
Introduction:
Microelectrodesplayasignificantroleinvariousscientificfields,includingneuroscience,electrochemistry,andbiophysics,indetectingeventhesmallestchangesinthequantityorqualityofchemicalandbiologicalelectricsignals.Amongdifferenttypesofmicroelectrodes,capillarymicroelectrodes,ormicroelectrodesfabricatedusingglasscapillaries,havedemonstratedsignificantsensitivityandpotentialindetectingsmalldifferencesinbioelectricity,andanalyzingchemicalreactionsindifferentmatrices.Therefore,thefabricationandoptimizationofcapillarymicroelectrodesareessentialtoimprovetheirsensitivity,accuracy,andversatilityforvariousapplications.Thispaperaimstodiscussdifferentfactorsthatinfluencethepreparationofmicroelectrodesandtheoptimizationoftheparametersusedinthefabricationprocess.
ParametersforFabricationofCapillaryMicroelectrodes:
Differentparametersplayavitalroleinthefabricationprocessofcapillarymicroelectrodes,includingcapillarydiameter,capillarylength,chemicalcoating,tipdiameter,andelectrochemicaltesting.Theseparameterscanimpactthesensitivity,selectivity,andresponsetimeofthemicroelectrodes.
CapillaryDiameter:
Thediameterofthecapillarymicroelectrodeinfluencestheanalytediffusionandsensitivityofthemicroelectrode.Asmallerdiameterleadstodecreasedsolutionresistanceandeasierdiffusionofanalytestotheelectrodesurface,enhancingtheoverallsensitivityofthemicroelectrode.Therefore,asmallerdiameterisgenerallypreferredformicroelectrodes;however,thefabricationprocessbecomesmorechallengingasthediameterdecreases.
CapillaryLength:
Whilecapillarydiameterisessential,capillarylengthcanalsoimpacttheoverallperformanceofmicroelectrodes.Longermicroelectrodescancauseincreasedresistance,requiringhighervoltageinput,andaddingmorenoisetothemeasurements.Ashorterlengthreducestheresistanceandlowersthenecessaryvoltageinput,resultinginlowernoiselevels.
ChemicalCoating:
Theuseofchemicalcoatingsinmicroelectrodefabricationandoptimizationcanaffectthesensitivityandselectivityofthemicroelectrodes.Forexample,anonpor