Pt nanoparticles encapsulated in dendrimers (DEN(PtNP)s) were synthesized in the presence of NH2-terminated fourth generation poly(amido amine) (G4-PAMAM) dendrimers. Subsequently DEN(PtNP)s were covalently bound on acid-treated carbon nanotubes (CNTs). The resultant nanohybrid materials were chemically bound on a working electrode in a disposable electrochemical printed (DEP) chip. The methanol oxidation reaction was investigated by using a cyclic voltammetry equipped with the thus-modified DEP chip, and the reasonable results were obtained.
The CNT-loaded DEP chip was modified for determining the organophosphate pesticides in food contamination. For this purpose, the enzymes (acetylcholine esterase and choline oxidase) were mounted on dendrimers on the chip. The reproducibility of the data and the stability of the electrode were good enough. The sensitivity is high to be ppb order.