Magnetic Reduced Graphene Oxide/Nickel/Platinum Nanoparticles Micromotors for Mycotoxin Analysis

Chemistry : a European Journal
Águeda Molinero-FernándezA Escarpa

Abstract

Magnetic reduced graphene oxide/nickel/platinum nanoparticles (rGO/Ni/PtNPs) micromotors for mycotoxin analysis in food samples were developed for food-safety diagnosis. While the utilization of self-propelled micromotors in bioassays has led to a fundamentally new approach, mainly due to the greatly enhanced target-receptor contacts owing to their continuous movement around the sample and the associated mixing effect, herein the magnetic properties of rGO/Ni/PtNPs micromotors for mycotoxin analysis are additionally explored. The micromotor-based strategy for targeted mycotoxin biosensing focused on the accurate control of micromotor-based operations: 1) on-the-move capture of free aptamers by exploiting the adsorption (outer rGO layer) and catalytic (inner PtNPs layer) properties and 2) micromotor stopped flow in just 2 min by exploiting the magnetic properties (intermediate Ni layer). This strategy allowed fumonisin B1 determination with high sensitivity (limit of detection: 0.70 ng mL-1 ) and excellent accuracy (error: 0.05 % in certified reference material and quantitative recoveries of 104±4 % in beer) even in the presence of concurrent ochratoxin A (105-108±8 % in wines). These results confirm the developed approach as an...Continue Reading

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Citations

Feb 1, 2019·Advanced Materials·Bahareh Khezri, Martin Pumera
May 24, 2019·Chemical Communications : Chem Comm·Roberto Maria-HormigosAlberto Escarpa
Aug 25, 2019·Analytical and Bioanalytical Chemistry·Marta PachecoAlberto Escarpa
Jan 16, 2020·International Journal of Molecular Sciences·Fan LiPeng Huang
Apr 26, 2021·Analytica Chimica Acta·Vicente Antonio Mirón-MéridaFrancisco M Goycoolea
Jun 12, 2020·Analytical Chemistry·Víctor de la Asunción-NadalAlberto Escarpa
Oct 6, 2020·ACS Applied Materials & Interfaces·Kaisong YuanAlberto Escarpa
Jul 5, 2018·Journal of the American Chemical Society·Jemish ParmarSamuel Sánchez

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