铂纳米颗粒修饰直立碳纳米管电极的葡萄糖生物传感器

基于Pt纳米颗粒修饰直立的碳纳米管电极制备了葡萄糖生物传感器.铂纳米颗粒是利用电位脉冲沉积法修饰到直立碳纳米管上的,可以增强电极对酶反应过程当中产生的过氧化氢的催化行为.用扫描电镜和透射电镜观察了直立碳纳米管在修饰Pt纳米颗粒前后的形态.该酶电极对葡萄糖的氧化表现出很好的响应,线性范围为1×10-5～7×10-3mol/L,响应时间小于5s,并且有很好的重现性.

Glucose Biosensor Based on Pt Nanoparticles Modified Aligned Carbon Nanotubes Electrode

A sensitive amperometric glucose biosensor based on Platinum(Pt) nanoparticles modified aligned carbon nanotubes(ACNTs)electrode was investigated.Pt nanoparticles which could enhance the electrocataly-tic activity of the electrode for electrooxidating hydrogen peroxide produced with enzymatic reactions were electrocrystallized on 4-aminobenzene monolayer-grafted aligned carbon nanotubes electrode with a potential-step method.These Pt nanoparticles modified ACNTs surfaces were characterized with scanning electron microscopy(SEM) and transmission electron microscopy(TEM).The nano-scale Pt particles dispersed highly on ACNTs can be obtained.The enzyme electrode exhibitsan excellent response performance to glucose with a linear range from 1×10-5 to 7×10-3 mol/L and fast response time within 5 s.Furthermore,this glucose biosensor also has a good reproducibility.