OICC Press International Journal of Biophotonics and Biomedical Engineering (IJBBE) 2980-9037 3 1 2023 07 01 The liquid environment effect on photoluminescence properties of carbon nanoparticles prepared by laser ablation method in liquids with possible biocompatibility applications 1 10 10.30495/ijbbe.2023.703605 EN Rasoul Malekfar Department of Physics, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, I.R. Iran Samad Moemen Bellah Department of Physics, Faculty of Basic Sciences, Tarbiat Modares University, Tehran, I.R. Iran Fatemeh Kazemizadeh Department of Physics, Faculty of basic Sciences, Tarbiat Modares University, Tehran, I.R. Iran Journal Article 2023 07 01 Fluorescent carbon nanoparticles (CNPs) were prepared by nanosecond laser ablation of graphite powder in liquid. The effect of the liquid medium on photoluminescence (PL) efficiency and wavelength range were studied experimentally. Four solvents, polyethylene glycol, diethanolamine, diethylamine, and ethylenediamine were used as liquid platforms in the synthesis process. Analyzing the chemical components and optical spectral characterization of CNPs was carried out by attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy and photoluminescence (PL) spectroscopy, respectively. Moreover, the size of CNPs was estimated by using dynamic light scattering (DLS) measurements. Liquid components are determined to be a key factor affecting PL properties and nanoparticle size. The results are valuable in practical applications.