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The QDs\/SA were first bound to biotinylated NS1 antibody (Ab) and the QDs\/SA-Ab conjugates were then used to detect the NS1 antigen (Ag) in the Ag concentration range of 1\u00a0pM to 120\u00a0nM. The formation of QDs\/SA-Ab and QDs\/SA-Ab-Ag conjugates was confirmed by the measurements of field emission scanning electron microscopy (FF-SEM), field emission transmission electron microscopy (FE-TEM), dynamic light scattering (DLS), and zeta-potential. Fluorescence emission spectra of QDs\/SA-Ab-Ag conjugates showed that the magnitude of fluorescence quenching was linearly proportional to the NS1 Ag concentration and it nicely followed the Stern\u2013Volmer (SV) equation in phosphate buffer solution. However, in human plasma serum solution, the fluorescence quenching behavior was negatively deviated from the SV equation presumably due to interference by the serum component biomolecules, and it was well explained by the Lehrer equation. These results suggest that the current approach is promising because it is highly sensitive, fast, simple, and convenient, and thus it has a potential of application for point-of-care.<\/jats:p>","DOI":"10.1038\/s41598-021-94172-x","type":"journal-article","created":{"date-parts":[[2021,7,26]],"date-time":"2021-07-26T10:10:53Z","timestamp":1627294253000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":30,"title":["Highly sensitive detection of dengue biomarker using streptavidin-conjugated quantum dots"],"prefix":"10.1038","volume":"11","author":[{"given":"Linh","family":"Tran","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sangkwon","family":"Park","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,7,26]]},"reference":[{"key":"94172_CR1","doi-asserted-by":"crossref","unstructured":"J.P. 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