Post‐Synthetic Graphitization and Photoluminescence Tuning of Carbon Dots from L‐Glutamic Acid DOI Creative Commons
Andrés Ferrer‐Ruiz, Laura Rodríguez‐Pérez, Nazario Martı́n

et al.

Small Structures, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Carbon dots are promising luminescent nanostructures. Their availability, based on inexpensive precursors and their intrinsic fluorescent nature, place them as potential choices against traditional quantum in some applications. However, the carbon nature is nowadays not well defined understood. They usually hybrid nanomaterials terms of structure composition, which hinders knowledge photoluminescence mechanisms. Herein, solvent‐free pyrolysis L ‐glutamic acid by microwave synthesis leads to an incomplete graphitization precursor resulting loose polymer‐like nanohybrids. Further experiments confirm that these (CD) can be crosslinked graphitized a second heating step when using temperatures above 160 °C, reaching plateau over 200 °C. An exhaustive analysis thermogravimetric analysis, Raman X‐ray photoelectron spectroscopy highlights structural changes undergo from 140 where increase stability observed due process. The condensation decarboxylation reactions with loss hydrophilic functional groups like amine carboxylic acids explain formation sp 2 domains concomitant solubility. annealed CD exhibit broader slightly red‐shifted emission band, lower yields, compared initial

Language: Английский

Post‐Synthetic Graphitization and Photoluminescence Tuning of Carbon Dots from L‐Glutamic Acid DOI Creative Commons
Andrés Ferrer‐Ruiz, Laura Rodríguez‐Pérez, Nazario Martı́n

et al.

Small Structures, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Carbon dots are promising luminescent nanostructures. Their availability, based on inexpensive precursors and their intrinsic fluorescent nature, place them as potential choices against traditional quantum in some applications. However, the carbon nature is nowadays not well defined understood. They usually hybrid nanomaterials terms of structure composition, which hinders knowledge photoluminescence mechanisms. Herein, solvent‐free pyrolysis L ‐glutamic acid by microwave synthesis leads to an incomplete graphitization precursor resulting loose polymer‐like nanohybrids. Further experiments confirm that these (CD) can be crosslinked graphitized a second heating step when using temperatures above 160 °C, reaching plateau over 200 °C. An exhaustive analysis thermogravimetric analysis, Raman X‐ray photoelectron spectroscopy highlights structural changes undergo from 140 where increase stability observed due process. The condensation decarboxylation reactions with loss hydrophilic functional groups like amine carboxylic acids explain formation sp 2 domains concomitant solubility. annealed CD exhibit broader slightly red‐shifted emission band, lower yields, compared initial

Language: Английский

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