Original title: MoS2/carbon nanotubes nanocomposite thin films as platform for electrochemical dengue detection
Patricia S Araújo, Gustavo Martins, Luiz H Marcolino-Jr, Márcio F Bergamini +1 · August 2026
Dengue fever is a dangerous viral illness, and doctors need fast, affordable ways to catch it early. To solve this, researchers built a sensitive sensor that spots a specific dengue protein called NS1 in blood. They made a very thin coating by mixing carbon nanotubes with molybdenum disulphide, a layered mineral. Carbon nanotubes conduct electricity well, while the mineral adds extra surface for reactions. The team coated this mixture onto an electrode and attached antibodies to it. When the dengue protein touches the electrode, it latches onto these matching antibodies. This binding event alters the sensor's electrical signals, revealing the infection. The sensor detected dengue protein levels from 4-1000 ng mL-1, reaching down to 8 ng mL-1. It worked reliably even in diluted human serum and ignored other illnesses like Chikungunya and Yellow Fever.
You are baking cookies and need to check if the dough has enough sugar. Normally you taste a pinch directly. Now imagine you cannot taste the dough, but you can weigh the mixing bowl as you add sugar. Each extra spoonful of sugar makes the bowl heavier by a tiny, repeatable amount. In this paper, the sensor weighs the dengue protein electrically: as more NS1 sticks to the antibodies on the film, the electrical resistance changes in a predictable way, so you can calculate exactly how much protein is in a sample without needing any chemical tags.
Dengue fever kills tens of thousands each year, especially where labs are scarce. Current tests need expensive equipment and trained staff. This cheap, printed sensor spots the virus early from a tiny blood sample, using materials that cost pennies to make. It could put reliable dengue diagnosis in village clinics.
The abstract reports results in diluted human serum and on a lab-made electrode, not a commercially manufactured test strip. The dynamic range and detection limit were established in controlled lab conditions; performance in real field samples with varied backgrounds is not shown. Long-term stability and shelf life of the film are not addressed.
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MoS2/carbon nanotubes nanocomposite thin films as platform for electrochemical dengue detection — Patricia S Araújo, Gustavo Martins, Luiz H Marcolino-Jr et al. — Bioelectrochemistry (Amsterdam, Netherlands) — doi:10.1016/j.bioelechem.2026.109420
Abstract licence: CC BY
Explanation generated by Synthesis from the abstract — it is not the original paper.