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

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 μM, respectively.