Publications by authors named "Rolando Efrain Ramirez Garza"
Article Synopsis
- Photoluminescence (PL) spectroscopy is a highly sensitive and quick method for detecting molecules, and zinc oxide (ZnO) shows promising optical properties, especially when combined with graphene quantum dots (GQD) for applications in photocatalysis and sensing.* -
- The study examined the PL performance of ZnO and ZnO-GQD nanocomposites in both solid and aqueous phases, identifying six distinctive peaks in their emissions and emphasizing the key role of the peak at around 415 nm where GQD interacts with ZnO.* -
- Varying GQD concentrations affected PL emission in the aqueous phase, with low concentrations weakening the ZnO-GQD contact, high concentrations enhancing it, and medium concentrations maintaining
In this work, graphene quantum dots (GQD) were prepared through a hydrothermal process. The photoluminescence (PL) emission spectrum for GQD prepared with high NHOH concentration (sample D1-t) was attained at lower wavelength (406 nm), compared to GQD synthesized with low NHOH concentration (sample D2-t attained at 418 nm). From these results, a smaller particle size for D1-t was deduced; according to TEM images the GQD particles are around 5 nm.
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