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1、4-乙酰氨基酚、5-羟色胺、果糖和甘露糖等对葡萄糖测定的干扰很小,Fe3O4纳米柱阵列对人体血液样本中葡萄糖的测定结果与本地医院血液分析仪的测定结果基本一致,其RSD仅为3.1%。采用标准加入法分析血糖浓度的回收率为95~98%以上,说明测定结果具有很好的可靠性。(2)利用阳极氧化法在316L不锈钢片表面制备了纳米孔阵列结构,在氢氧化钠溶液中转变为纳米孔/纳米针阵列复合结构(aciculas@NPs),对葡萄糖的检测灵敏度相对于抛光不锈钢材料得到了极大提高,在检测电位0.5V、0.1MNaOH的溶液
2、中对葡萄糖的检测限为0.5μM(S/N=3),葡萄糖浓度从1μM至1664μM之间,响应电流与浓度具有良好的线性关系,对葡萄糖响应的灵敏度为194.4−2−1μA·cm·mM。本文制备的aciculas@NPs对葡萄糖检测的稳定性良好,10次连续测定结果的RSD仅为4.9%,并且在常温保存45天后,其响应值与初始响应值的RSD仅为3.7%。对葡萄糖响应的选择性良好,血液中的UA和AA引起的测定干扰很小,并且测定结果与本地医院血液分析仪的测定结果基本一致,其RSD小于5%。采用标准加入法分析血糖浓度的
3、回收率为90%以上,说明该传感器测定结果的可靠性良好。关键词:无酶葡萄糖传感器;Fe3O4纳米柱阵列;阳极氧化法;316L不锈钢;纳米孔阵列II万方数据AbstractThereareapproximately100millionpeoplesufferedfromdiabetesmellitusinChina.Frequentmonitoringofthebloodglucoseleveliscriticaltopatientstoavoiddiabeticemergency.Electroche
4、micalglucosesensorsbasedonglucoseoxidase(GOx)haveattractedconsiderableattentionandhavebecomeadominantfigureinbiosensormarketduetotheirgoodsensitivity,selectivity,simplicity,andcompatibilityinreal-timedetection.However,theenzyme-basedsensorsaresensitive
5、tolight,temperatureandpHvalueandusuallysufferfromlimitedlifetimeandconsumptionofthevaluableenzymereagent.Enzyme-freeglucosesensorsfabricatedbymetalormetaloxidesuchasPt,Pd,Ag,CuandNi,havebeenintensivelystudiedrecently.Ferritehasbeenextensivelyemployedin
6、biologicaldevicesfortheirchemicalstability,biocompatibilityandnon-toxictohumans.Buttherearefewreportstodevelopglucosesensorsbasedonironoxides.Moreover,theoverallkineticsofglucoseoxidationonferriteistooslowtoproduceadequatefaradaiccurrents,thusleadingto
7、poorsensitivity.Herein,nanostructuredglucosesensorsfabricatedonironfoilandstainlesssteelfoilweredescribed.Thenanorodarrayandnanoporearraystructuresnotonlypossesshighsurface-to-volumeratio,butalsoprovideadirectelectrontransferpathwaythatcanenhancetheana
8、lyticalperformanceofglucosesensors.Themorphology,microstructure,andchemicalcompositionofthesenanostructureswerecharacterizedbySEM,EDS,XRDandRamanspectrum.Theanalyticalperformanceoftheglucosesensorswasevaluatedbycyclicvoltammetryandamper