tetano
Editor, Senior Moderator
Anal Chem
. 2022 Jan 4.
doi: 10.1021/acs.analchem.1c04296. Online ahead of print.
Capacitive Aptasensor Coupled with Microfluidic Enrichment for Real-Time Detection of Trace SARS-CoV-2 Nucleocapsid Protein
Haochen Qi[SUP] 1 [/SUP], Zhiwen Hu[SUP] 2 [/SUP], Zhongliang Yang[SUP] 3 [/SUP], Jian Zhang[SUP] 1 4 [/SUP], Jie Jayne Wu[SUP] 5 [/SUP], Cheng Cheng[SUP] 6 [/SUP], Chunchang Wang[SUP] 7 [/SUP], Lei Zheng[SUP] 4 [/SUP]
Affiliations
Abstract
The pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has lasted for almost 2 years. Stemming its spread has posed severe challenges for clinical virus detection. A long turnaround time, complicated operation, and low accuracy have become bottlenecks in developing detection techniques. Adopting a direct antigen detection strategy, we developed a fast-responding and quantitative capacitive aptasensor for ultratrace nucleocapsid protein detection based on a low-cost microelectrode array (MEA) chip. Employing the solid-liquid interface capacitance with a sensitivity of picofarad level, the tiny change on the MEA surface can be definitively detected. As a result, the limit of detection reaches an ultralow level of femtogram per milliliter in different matrices. Integrated with efficient microfluidic enrichment, the response time of this sensor from the sample to the result is shortened to 15 s, completely meeting the real-time detection demand. Moreover, the wide linear range of the sensor is from 10[SUP]-5[/SUP] to 10[SUP]-2[/SUP] ng/mL, and a high selectivity of 6369:1 is achieved. After application and evaluation in different environmental and body fluid matrices, this sensor and the detection method have proved to be a label-free, real-time, easy-to-operate, and specific strategy for SARS-CoV-2 screening and diagnosis.
. 2022 Jan 4.
doi: 10.1021/acs.analchem.1c04296. Online ahead of print.
Capacitive Aptasensor Coupled with Microfluidic Enrichment for Real-Time Detection of Trace SARS-CoV-2 Nucleocapsid Protein
Haochen Qi[SUP] 1 [/SUP], Zhiwen Hu[SUP] 2 [/SUP], Zhongliang Yang[SUP] 3 [/SUP], Jian Zhang[SUP] 1 4 [/SUP], Jie Jayne Wu[SUP] 5 [/SUP], Cheng Cheng[SUP] 6 [/SUP], Chunchang Wang[SUP] 7 [/SUP], Lei Zheng[SUP] 4 [/SUP]
Affiliations
- PMID: 34982528
- DOI: 10.1021/acs.analchem.1c04296
Abstract
The pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has lasted for almost 2 years. Stemming its spread has posed severe challenges for clinical virus detection. A long turnaround time, complicated operation, and low accuracy have become bottlenecks in developing detection techniques. Adopting a direct antigen detection strategy, we developed a fast-responding and quantitative capacitive aptasensor for ultratrace nucleocapsid protein detection based on a low-cost microelectrode array (MEA) chip. Employing the solid-liquid interface capacitance with a sensitivity of picofarad level, the tiny change on the MEA surface can be definitively detected. As a result, the limit of detection reaches an ultralow level of femtogram per milliliter in different matrices. Integrated with efficient microfluidic enrichment, the response time of this sensor from the sample to the result is shortened to 15 s, completely meeting the real-time detection demand. Moreover, the wide linear range of the sensor is from 10[SUP]-5[/SUP] to 10[SUP]-2[/SUP] ng/mL, and a high selectivity of 6369:1 is achieved. After application and evaluation in different environmental and body fluid matrices, this sensor and the detection method have proved to be a label-free, real-time, easy-to-operate, and specific strategy for SARS-CoV-2 screening and diagnosis.