In this communication, a new photoelectrochemical aptasensor with Au nanoparticle functionalized self-doped TiO2 nanotube arrays (Au/SD-TiO2 NTs) as the core sensing unit and aptamers as the recognition unit was set up to accomplish the sensitive and selective detection of kanamycin with the lowest detection limit of 0.1 nM.

We have developed an amplified fluorescence polarization aptasensor that relies on aptamer structure-switching-triggered nanoparticles (NPs) enhancement for biomolecules detection. This new type of assay exhibits higher detection sensitivity over traditional homogeneous aptasensors by two orders of magnitude and high specificity for target molecules.

An aptamer to selectively detect ochratoxin A (OTA) in cereals was developed using silver nanoparticles (AgNPs) combination with reduced graphene oxide (rGO). As a result of characterization experiments conducted this study, AgNPs were confirmed be polydisperse. The electrocatalytic activity achieved by immobilizing OTA-bovine serum albumin (OTA-BSA) on the rGO/AgNPs substrate. On basis experim...

electrochemical aptamer-based sensors attract a lot of interest as useful methods because of their low cost, accuracy, sensitivity, and simplicity. an electro-active redox molecule comprises the main part of the electrochemical-based sensors. ferrocene is one of the most popular redox molecule used in biosensor fabrication. but, instability of ferrocenium ion in strong nucleophilic reagents and...

Herein, we have elaborated a new electrochemical aptasensor for the detection of ultra-trace amounts aflatoxin M1 (AFM1) present in cow milk, with regulated low levels. To achieve AFM1, simple strategy deposition specific aptamers was elaborated, based on their grafting pectin-reduced gold nanoparticles (AuNPs) electrogenerated graphene oxide sheet modified glassy carbon electrode. The elaborat...