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Ultrasensitive and Reusable Graphene Oxide-Modified Double-Interdigitated Capacitive (DIDC) Sensing Chip for Detecting SARS-CoV-2.
Sharma, Parshant Kumar; Kim, Eun-Seong; Mishra, Sachin; Ganbold, Enkhzaya; Seong, Ryun-Sang; Kaushik, Ajeet Kumar; Kim, Nam-Young.
  • Sharma PK; RFIC Bio Centre, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, South Korea.
  • Kim ES; Department of Electronics Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, South Korea.
  • Mishra S; RFIC Bio Centre, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, South Korea.
  • Ganbold E; Department of Electronics Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, South Korea.
  • Seong RS; RFIC Bio Centre, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, South Korea.
  • Kaushik AK; Department of Electronics Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, South Korea.
  • Kim NY; NDAC Centre, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, South Korea.
ACS Sens ; 6(9): 3468-3476, 2021 09 24.
Article in English | MEDLINE | ID: covidwho-1392782
ABSTRACT
This research reveals the promising functionalization of graphene oxide (GrO)-glazed double-interdigitated capacitive (DIDC) biosensing platform to detect severe acute respiratory syndrome coronavirus (SARS-CoV-2) spike (S1) proteins with enhanced selectivity and rapid response. The DIDC bioactive surface consisting of Pt/Ti featured SiO2 substrate was fabricated using GrO/EDC-NHS/anti-SARS-CoV-2 antibodies (Abs) which is having layer-by-layer interface self-assembly chemistry method. This electroactive immune-sensing platform exhibits reproducibility and sensitivity with reference to the S1 protein of SARS-CoV-2. The outcomes of analytical studies confirm that GrO provided a desired engineered surface for Abs immobilization and amplified capacitance to achieve a wide detection range (1.0 mg/mL to 1.0 fg/mL), low limit of detection (1 fg/mL) within 3 s of response time, good linearity (18.56 nF/g), and a high sensitivity of 1.0 fg/mL. Importantly, the unique biochip was selective against blood-borne antigens and standby for 10 days at 5 °C. Our developed DIDC-based SARS-CoV-2 biosensor is suitable for point-of-care (POC) diagnostic applications due to portability and scaling-up ability. In addition, this sensing platform can be modified for the early diagnosis of severe viral infections using real samples.
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Full text: Available Collection: International databases Database: MEDLINE Document Type: Article Main subject: SARS-CoV-2 / COVID-19 Subject: SARS-CoV-2 / COVID-19 Type of study: Screening study Language: English Journal: ACS Sens Clinical aspect: Diagnosis Year: 2021

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Full text: Available Collection: International databases Database: MEDLINE Document Type: Article Main subject: SARS-CoV-2 / COVID-19 Subject: SARS-CoV-2 / COVID-19 Type of study: Screening study Language: English Journal: ACS Sens Clinical aspect: Diagnosis Year: 2021
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