Cost-effective chemiresistive biosensor with MWCNT-ZnO nanofibers for early detection of tuberculosis (TB) lipoarabinomannan (LAM) antigen.

Autor: Rotake DR; Department of Electrical Engineering, Indian Institute of Technology, Hyderabad, India. dinesh.rotake@gmail.com., Zalke JB; Department of Electronics Engineering, Ramdeobaba University, Nagpur, India. zalkej@rknec.edu., Gechode HV; Department of Electronics Engineering, Ramdeobaba University, Nagpur, India., Peshkar SM; Department of Electronics Engineering, Ramdeobaba University, Nagpur, India., Singh SG; Department of Electrical Engineering, Indian Institute of Technology, Hyderabad, India.
Jazyk: angličtina
Zdroj: Mikrochimica acta [Mikrochim Acta] 2024 Oct 29; Vol. 191 (11), pp. 714. Date of Electronic Publication: 2024 Oct 29.
DOI: 10.1007/s00604-024-06780-9
Abstrakt: The development of an affordable chemiresistive biosensor enhanced with a multi-walled carbon nanotube-zinc oxide (MWCNT-ZnO) nanofiber composite is presented. The sensor leverages the precise interaction between lipoarabinomannan (LAM) tuberculosis (TB) antigens and antibodies to achieve high sensitivity and specificity. The MWCNT-ZnO nanofibers have a larger surface area and better electrical conductivity, which makes it easier for TB antibodies to stick to them. The binding of LAM TB antigens to the fixed Monoclonal Antibody-MBS320597 induces significant resistance changes in the chemiresistive sensor, enabling accurate TB detection. Performance evaluation reveals a linear detection range from 1.0 to 100.0 pg/mL in the lower concentration range and up to 6.0 ng/mL in the higher concentration range, with a sensitivity of 79.750 mA pg mL -1  cm -2 and a lower limit of detection of 40.54 fg/mL. The sensor exhibits a response time of 102 s. Featuring rapid response time and high sensitivity, this biosensor is ideally suited for point-of-care (PoC) applications. The incorporation of MWCNT-ZnO nanofibers shows great potential for enhancing the development of sensitive and cost-effective TB diagnostic tools, which could play a crucial role in advancing global TB control and management efforts.
(© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature.)
Databáze: MEDLINE
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