Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5031693 | Biosensors and Bioelectronics | 2017 | 9 Pages |
Abstract
A novel nanocomposite material consisting of reduced graphene oxide/Rh nanoparticles was prepared by a one-pot reaction process. The strategy involved the simultaneous reduction of RhCl3 and graphene oxide with NaBH4 and the in situ deposition of the metal nanoparticles on the 2D carbon nanomaterial planar sheets. Glassy carbon electrode coated with this nanocomposite was employed as nanostructured support for the cross-linking of the enzyme laccase with glutaraldehyde to construct a voltammperometric biosensor for 17β-estradiol in the 0.9-11 pM range. The biosensor showed excellent analytical performance with high sensitivity of 25.7 A µMâ1 cmâ1, a very low detection limit of 0.54 pM and high selectivity. The biosensor was applied to the rapid and successful determination of the hormone in spiked synthetic and real human urine samples.
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Authors
Eloy Povedano, Fernando H. Cincotto, Concepción Parrado, Paula DÃez, Alfredo Sánchez, Thiago C. Canevari, Sergio A.S. Machado, José M. Pingarrón, Reynaldo Villalonga,