[17a-P01-1~66] 17 Nanocarbon and Two-Dimensional Materials (Poster)

[17a-P01-32] Improved Homogeneity of High-Quantum-Yield Graphene Quantum Dots Separated via Column Chromatography

〇(M2)Natsuno Ishii¹, Takuya Hosokai², Toshiki Sugai¹, Shota Kuwahara¹ (1.Toho Univ., 2.AIST)

Keywords:

Graphene quantum dots,Chromatography

Unavoidable structural heterogeneity and polydispersity adversely impact the emission wavelength and monochromaticity of as-synthesized graphene quantum dots (GQDs), which limit their practical applications as a luminescent material. In this work, the size and surface state of benzyl-alcohol-esterified GQDs were controlled by sequential separation process via silica gel and size exclusion column chromatography, resulting in an improvement in the photoluminescence quantum yield of GQDs from 32.0 % to 53.9 %.