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Chitosan-Based Emissive Carbon Nanosheets and Their Solid-State Temperature-Dependent Photoluminescent Study

Senapati, S and Naik, R and Dash, S and Mohanty, A and Braeckmans, K and De Smedt, SC and Samal, SK (2023) Chitosan-Based Emissive Carbon Nanosheets and Their Solid-State Temperature-Dependent Photoluminescent Study. In: ACS Sustainable Chemistry and Engineering, 11 (37). pp. 13535-13544.

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Official URL: https://doi.org/10.1021/acssuschemeng.3c00914


Biomass-derived luminescent nitrogen-doped carbon nanosheets have many advantages over other emissive nanobiomaterials for various sensing and bioimaging applications. In this study, emissive nitrogen-doped carbon nanosheets (N-CNS) are prepared from biomass chitosan (CS) at different temperatures in a furnace at atmospheric air, and their photoluminescent (PL) properties have been evaluated. The luminescent N-CNS are prepared by a unique ecofriendly, cost-effective green approach without any harsh chemical treatments. The as-prepared N-CNS demonstrated intense visible PL emissions in the solid state with an excitation-dependent behavior: with 355 nm excitation, a bluish emission appears, and for 532 nm excitation, an orange-red emission was observed. N-CNS shows temperature-dependent PL emissions without change in the peak positions, depicting the possible application in optical thermometry. The sensitivity value of 1.22 K-1 is obtained from the variation of PL intensity with temperature, which is better than the reported carbon nanomaterial-based sensors. The luminescence properties of N-CNS in the water-dispersed state were also analyzed, where an excitation-dependent emission is apparent, which is suitable for various biomedical applications. The obtained results demonstrated that environment-friendly N-CNS could be employed for nanoscale temperature-sensing, bioimaging, and other therapeutic applications. © 2023 American Chemical Society

Item Type: Journal Article
Publication: ACS Sustainable Chemistry and Engineering
Publisher: American Chemical Society
Additional Information: The copyright for this article belongs to the American Chemical Society.
Keywords: Atmospheric temperature; Biomass; Carbon; Chitosan; Cost effectiveness; Doping (additives); Excited states; Luminescence; Medical applications; Nanosheets; Nitrogen; Sensitivity analysis; Temperature sensors, Bio-imaging; Carbon nanosheets; Luminescent carbon nanosheet; Nitrogen-doped carbons; Nitrogen-doping; Photoluminescent emission; Solid state emission; Solid-state temperatures; Temperature dependent; Temperature sensing, Bioimaging
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 28 Oct 2023 07:58
Last Modified: 28 Oct 2023 07:58
URI: https://eprints.iisc.ac.in/id/eprint/83151

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