Carbon Dots Synthetization by Intense CW Laser at 450 nm

¹Department of Mathematical and Computer Sciences, Physical Sciences and Earth Sciences, MIFT, University of Messina, V.le F. Stagno d'Alcontres 31, 98166, Messina, Italy

²Faculty of Medicine and Surgery, Kore University of Enna, 94100, Enna, Italy

*Corresponding author: Prof. Lorenzo Torrisi, Department of Mathematical and Computer Sciences, Physical Sciences and Earth Sciences, MIFT, University of Messina, V.le F. Stagno d'Alcontres 31, 98166, Messina, Italy, E-mail: [email protected]

Received Date: June 08, 2024

Publication Date: June 21, 2024

Citation: Torrisi L, et al. (2024). Carbon Dots Synthetization by Intense CW Laser at 450 nm. Nanoparticle. 5(1):14.

Copyright: Torrisi L, et al. © (2024).

ABSTRACT

Biocompatible Carbon dots (CDs) were obtained by the CW laser irradiation of vegetable carbon placed in a Phosphate-Buffered Saline (PBS) solution. The carbon nanoparticles were generated by a continuum (CW) diode laser operating at a 450 nm wavelength with 1 mm² spot size, irradiating the carbon target for a few hours.

The CDs generation might be due to photothermal, and photochemical effects induced by the prolonged laser irradiation inducing carbon atoms ejection, scissions, radical formation, chemical bond breaking, molecular detachment bounded by weakly bonds and van de Walls forces.

Measurements of carbon ablation in solution, UV-Vis spectroscopy, FTIR transmission and visible luminescence were employed to study the CDs synthetization. The UV excitation at a 365 nm wavelength was employed to induce visible CDs luminescence mainly at about 480 nm wavelength, giving to the emitted light a characteristic blue color. The CDs luminescence in biocompatible solutions is presented and discussed in view of possible applications in various sectors, such as detector devices, matter physics, engineering, microelectronics, sensors and, above all, in relation to bio-images from cell cultures and biological tissue, as possible applications to the bio-medical field.

Keywords: Carbon Dots, Nanoparticles, Luminescence, PBS, Optical Spectroscopy, Laser Absorption Processes