Electrochemical Detection of the Emerging Pandemic Thrombocytopenia Syndrome (SFTS) Virus Antibodies
摘要
Severe fever with thrombocytopenia syndrome (SFTS), an emerging tick-borne viral infection caused by the SFTS virus (SFTEV), poses a significant global public health threat due to its potential for pandemic spread. In this study, a self-assembly (Au-SH) method was used to sequentially attach 1,6-hexanedithiol (1,6-HDT) and colloidal gold nanoparticles to a gold film sputtered on a polyethylene terephthalate (PET) substrate to form an electrode with a single layer of gold nanoparticles. Then, the antigen of the SFTS viruses (SFTSV) are firmly attached to the electrode through the self-assembly method to make the biosensor for the detection of SFTSV antibody. The results of electrochemical impedance analysis show that the single-layer gold nanoparticle biosensor proposed in this research can successfully detect the antibody of SFTSV in 65 min with a wide linear detection range from 200 to 25000 ng/mL with a linearity of 0.9701. The detection limit is measured to be 2.076 ng/mL. The single-layer gold nanoparticle biosensor proposed in this research has the advantages of simple manufacturing process, low cost, high detection sensitivity, and short detection time. It has great commercial application feasibility.