Synthesis of Graphene Quantum Dots by Pulsed Laser Ablation of Carbon Nanotubes
Svette Reina Merden S. Santiago1*, Tzu-Neng Lin1, Ji-Lin Shen1
1Physics, Chung Yuan Christian University, Taoyuan, Taiwan
* presenting author:Svette Reina Merden Santiago,
Graphene quantum dots (GQDs) have gained immense attention due to its exceptional optical properties. These properties of GQDs are associated with their quantum confinement, surface defects and edge structures. Herein, we have synthesized green fluorescent GQDs by pulsed laser ablation (PLA) synthesis of carbon nanotubes (CNTs). Moreover, GQDs’ measurements of transmission electron microscopy (TEM), ultraviolet-visible (UV-Vis) absorption, X-ray Photoelectron spectroscopy (XPS), and photoluminescence (PL) spectroscopy were gathered. Furthermore, the GQDs exhibits green luminescence with an increasing intensity with respect to increasing laser treatment time. Due to these characteristics, GQDs are compatible for application in fields of semiconductor, photovoltaics, biomedical imaging, and biological sensing.

Keywords: Graphene Quantum Dots, Pulsed Laser Ablation, Optical Properties, PL Enhancement, Carbon Nanotubes