2021
DOI: 10.1021/jacs.1c06325
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Direct SARS-CoV-2 Nucleic Acid Detection by Y-Shaped DNA Dual-Probe Transistor Assay

Abstract: Rapid screening of infected individuals from a large population is an effective means in epidemiology, especially to contain outbreaks such as COVID-19. The gold standard assays for COVID-19 diagnostics are mainly based on the reverse transcription polymerase chain reaction, which mismatches the requirements for wide-population screening due to time-consuming nucleic acid extraction and amplification procedures. Here, we report a direct nucleic acid assay by using a graphene field-effect transistor (g-FET) wit… Show more

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Cited by 91 publications
(93 citation statements)
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“…In biological buffer solutions, the charged protein molecules would be surrounded by oppositely charged ions due to electrostatic interaction, thus decreasing the effective charge of proteins. [ 28–41 ] This effect is known as Debye screening, and due to the Debye screening effect, the effective electrical field of FET biosensors could only be controlled within a distance called the Debye length (λ D ): [ 42,43 ] λDbadbreak=εkBT2NAq2I\[{\lambda _{\rm{D}}} = \sqrt {\frac{{\varepsilon {k_{\rm{B}}}T}}{{2{N_{\rm{A}}}{q^2}I}}} \] where ε is the dielectric constant of electrolyte. k B , T , and N A represent the Boltzmann's constant, temperature, and Avogadro's number, respectively.…”
Section: Resultsmentioning
confidence: 99%
“…In biological buffer solutions, the charged protein molecules would be surrounded by oppositely charged ions due to electrostatic interaction, thus decreasing the effective charge of proteins. [ 28–41 ] This effect is known as Debye screening, and due to the Debye screening effect, the effective electrical field of FET biosensors could only be controlled within a distance called the Debye length (λ D ): [ 42,43 ] λDbadbreak=εkBT2NAq2I\[{\lambda _{\rm{D}}} = \sqrt {\frac{{\varepsilon {k_{\rm{B}}}T}}{{2{N_{\rm{A}}}{q^2}I}}} \] where ε is the dielectric constant of electrolyte. k B , T , and N A represent the Boltzmann's constant, temperature, and Avogadro's number, respectively.…”
Section: Resultsmentioning
confidence: 99%
“…FET can also assist genosensor in recognition of nucleic acids. Kong et al 159 constructed a graphene-based FET containing y-shaped DNA dual probes for highly sensitive recognition of ORF1ab and N genes of SARS-CoV-2 nucleic acids. In addition to conventional electrochemical signals, photoelectrochemical signals can also be used for detection.…”
Section: Keyword Analysis and Evolution Of The Fieldmentioning
confidence: 99%
“…Therefore, for the accurate diagnosis of COVID-19 infection, NA testing is the most reliable method. Considering these issues and limitations of the RT-PCR method, electrochemical biosensors for screening SARS-CoV-2 NA were also developed to improve the clinical efficacy and reliability of COVID-19 diagnosis [104][105][106][107]. Kong et al constructed a NA assay using a Y-shaped dual DNA probe-modified graphene FET that could simultaneously target ORF1ab and N genes of SARS-CoV-2 NA (Figure 8a) [105].…”
Section: Electrochemical Nucleic Acid-based Detection Of Sars-cov-2 V...mentioning
confidence: 99%