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Nanostructured electrodes detecting bacteria or viruses through DNA hybridization represent a promising method, which may be useful in on-field applications where PCR-based methods are very expensive, time-consuming, and require trained personnel. Indeed, electrochemical sensors combine disposability, fast response, high sensitivity, and portability. Here, a low-cost and high-surface-area electrode, based on Au-decorated NiO nanowalls, demonstrates a highly sensitive PCR-free detection of a real sample of Mycoplasma agalactiae (Ma) DNA. NiO nanowalls, synthesized by aqueous methods, thermal annealing, and Au decoration, by electroless deposition, ensure a high-surface-area platform for successful immobilization of Ma thiolated probe DNA. The morphological, chemical, and electrochemical properties of the electrode were characterized, and a reproducible detection of synthetic Ma DNA was …
American Chemical Society
Publication date: 
20 Oct 2020

Mario Urso, Serena Tumino, Elena Bruno, Salvo Bordonaro, Donata Marletta, Guido Ruggero Loria, Adi Avni, Yosi Shacham-Diamand, Francesco Priolo, Salvo Mirabella

Biblio References: 
ACS Applied Materials & Interfaces