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• W4308054414 endingPage "4513" @default.
• W4308054414 startingPage "4495" @default.
• W4308054414 abstract "Approaching a nucleic acid amplification test (NAAT) based diagnosis of a pathogen from an electrochemistry pathway is a relatively economical, decentralized, and yet highly sensitive route. This work aimed to construct an electrochemical biosensor with a 2-electrode geometry using a transition metal oxide (TMO) based sensing layer. A series of batch-processed TiO2-V2O5 (TVO) nanocomposite-based electrodes were fabricated to probe their electrochemical performance and attain a highly sensitive dual-electrode electrochemical sensor (DEES) compared to pristine V2O5. The XRD analysis of the electrodes confirmed the formation of a nanocomposite, while the XPS analysis correlated the formation of oxygen vacancies with improved electrical conduction measured via EIS and I-V characterization. Furthermore, the work demonstrated the application of the optimized electrode in electrochemical detection of end-point loop-mediated isothermal amplification (LAMP) readout for 101-104 copies (0.1 zeptomoles to 0.1 attomoles) of SARS-CoV-2 RNA dependent RNA polymerase (RdRp) plasmid DNA and in vitro transcribed RNA in an aqueous solution. The device achieved a limit of detection as low as 2.5 and 0.25 copies per μL for plasmid DNA and in vitro transcribed RNA, respectively. The DEES was able to successfully detect in situ LAMP performed on magneto-extracted SARS-CoV-2 plasmid and RNA from (a) an aqueous solution, (b) a sample spiked with excess human genomic DNA, and (c) a serum-spiked sample. The DEES results were then compared with those of real-time fluorescence and commercially available screen-printed electrodes (SPEs)." @default.
• W4308054414 created "2022-11-07" @default.
• W4308054414 creator A5015879075 @default.
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• W4308054414 date "2022-01-01" @default.
• W4308054414 modified "2023-09-23" @default.
• W4308054414 title "A batch processed titanium–vanadium oxide nanocomposite based solid-state electrochemical sensor for zeptomolar nucleic acid detection" @default.
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• W4308054414 doi "https://doi.org/10.1039/d2ay01141g" @default.
• W4308054414 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36326012" @default.
• W4308054414 hasPublicationYear "2022" @default.
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