β-C3N4 Nanocrystals: Carbon Dots with Extraordinary Morphological, Structural, and Optical Homogeneity

Nicolò Mauro, Fabrizio Messina, Marco Cannas, Gaetano Giammona, Gianpiero Buscarino, Alice Sciortino, Luisa Sciortino, Alice Sciortino, Nicolò Mauro, Dagmar Gerthsen, Radian Popescu, Reinhard Schneider

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

Carbon nanodots are known for their appealing optical properties, especially their intense fluorescence tunable in the visible range. However, they are often affected by considerable issues of optical and structural heterogeneity, which limit their optical performance and limit the practical possibility of applying these nanoparticles in several fields. Here we developed a synthesis method capable of producing a unique variety of carbon nanodots displaying an extremely high visible absorption strength (ε > 3 × 106 M(dot)−1 cm−1) and a high fluorescence quantum yield (73%). The high homogeneity of these dots reflects in many domains: morphological (narrow size distribution), structural (quasiperfect nanocrystals with large electronic bandgaps), and optical (nontunable fluorescence from a single electronic transition). Moreover, we provide the proof of principle that an aqueous solution of these dots can be used as an active medium in a laser cavity, displaying a very efficient laser emission with dye-like characteristics, which reflects the benefits of such a highly homogeneous type of carbon-based nanodots.
Original languageEnglish
Pages (from-to)1695-1700
Number of pages6
JournalChemistry of Materials
Volume30
Publication statusPublished - 2018

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering
  • Materials Chemistry

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