MoS₂-DNA tetrahedral bioconjugate for high-performance DNA biosensors: application in viral infection diagnostics
An electrochemical DNA biosensor is presented for early viral infection detection, integrating molybdenum disulphide (MoS₂), tetrahedral DNA nanostructures (TDNs), and thionine-modified carbon nanodots (CNDsTy). The innovation of this work lies in the first-time integration of these nanomaterials fo...
| Autores: | , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/390018 |
| Acceso en línea: | http://hdl.handle.net/10261/390018 https://api.elsevier.com/content/abstract/scopus_id/105000028126 |
| Access Level: | acceso abierto |
| Palabra clave: | Bioconjugate Biosensor Differential pulse voltammetry Molybdenum disulphide Tetrahedral DNA nanostructures Thionine-modified carbon nanodots |
| Sumario: | An electrochemical DNA biosensor is presented for early viral infection detection, integrating molybdenum disulphide (MoS₂), tetrahedral DNA nanostructures (TDNs), and thionine-modified carbon nanodots (CNDsTy). The innovation of this work lies in the first-time integration of these nanomaterials for the preparation of a bioconjugate, whose synergy enables the biosensor's functionality. MoS₂ anchors the TDNs, which carry the capture probe for virus identification via genetic code recognition. CNDsTy allow the electrochemical detection based on their different affinity for single-stranded (ssDNA) and double-stranded DNA (dsDNA), enabling hybridization event identification. The biosensor achieves high sensitivity (detection limit of 5.00 fM) and can distinguish viral loads, validated with the SARS-CoV-2 ORF1ab sequence in human nasopharyngeal samples. |
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