Communication Dans Un Congrès Année : 2022

Facile Fabrication of Carbon Dots based Fluorescent Strips for Florimetric ON-OFF Sensor

Résumé

Carbon dots (CDs) are an emerging smart material that is applied in a wide range of applications including sensors, photocatalysis, bioimaging, and optoelectronic devices. In recent decades, CDs have been an alternative to semiconductor-based quantum dots due to their unique optical properties. CDs are highly fluorescent, zero in dimensional (<10 nm), sp2 and sp3 hybridized carbon core with highly surface-functionalized nanomaterials. While thousands of studies have already been published, carbon dot research is still emerging due to its unique structural and photoluminescent properties. Herein, we report a synthesis of highly fluorescent, amphiphilic, solid-state yellow luminescent, dual emissive carbon dots and their fabrication as strip probes for metal ion sensing. Remarkably, a simple tuning of the stoichiometric ratio of precursors leads to solid-state yellow luminescent and dual emissive CDs. In addition, we investigated, how nitrogen speciation, graphitization and surface functionality of carbon dots (CDs) can impact the structure-optical property relationship of CDs in solution and solid-state. We fabricated CDs-based fluorescent strips and utilized them as an ON-OFF fluorescence sensor to detect Hg2+ metal ions in an aqueous medium with great sensitivity and selectivity. These results would give an approach for tuning the fluorescence and structural characteristics of CDs to develop a simple strip-based probe without a self-quenching issue for sensor applications.

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Dates et versions

hal-04848032 , version 1 (19-12-2024)

Identifiants

  • HAL Id : hal-04848032 , version 1

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Chandra Mohan Singaravelu, Xavier Deschanels, Cyrielle Rey, Jérémy Causse. Facile Fabrication of Carbon Dots based Fluorescent Strips for Florimetric ON-OFF Sensor. 9th Forum on New Materials - CIMTEC 2022, Jun 2022, Perugia, Italy. ⟨hal-04848032⟩
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