Multiwalled Carbon Nanotubes Incorporated with Dendrimer Encapsulated with Pt Nanoparticles:An Attractive Material for Sensitive Biosensors

摘要

Dendrimer encapsulated Pt nanoparticles (Pt-DENs) with a diameter of 2-3 nm were used in combination with multiwalled carbon nanotubes (MWCNTs) for fabricating electrochemical sensors with remarkably improved sensitivity toward glucose.TEM images illustrated the deposition of Pt-DENs on carbon nanotubes whereas cyclic voltammetry (CV) confirmed an electrical contact through MWCNTs between Pt-DENs and electrode.And the MWCNTs incorporated with Pt-DENs modifying Pt/GOx elelctrode-based biosensors response more sensitively to glucose than the electrode modified with MWCNTs alone reported by others.The response time and detection limit of this biosensor was determined to be 5 s,and 2.5 mu M,respectively.