Smartphone-Based Peptide Nucleic Acid (PNA) Probe-Assisted Potentiometric Biosensor for Point-of-Care Testing of SARS-CoV-2 Nucleic Acid

M. Moreover, the sensing performance of the developed biosensor in human saliva was evaluated, and the recovery rates were found to be 96-98%. For proof of concept, a smartphone-based near-field communication electrochemical analyzer was integrated into the developed biosensor for potentiometric measurements. This biosensor is promising, as the antifouling PNA probes provide a new concept for the development of sensitive biosensors for screening for COVID-19 in biological samples.