Mas Syazlin Masbah, Anwar Iqbal, Junichi Ida, Rabiatul Basria S. M. N. Mydin, Nur Asshifa Md Noh, Rahadian Zainul, M. Hazwan Hussin
Conventional crosslinkers used to reduce the swelling of chitosan films are prone to toxicity. Fluorescent carbon nanoparticles, on the other hand, present a safer alternative. This study aims to crosslink microwave-synthesised green fluorescent carbon nanoparticles (GFCNPs) with high quantum yield (44%) and chitosan film via solvent casting (CHT/GFCNPs). The particle size distribution of GFCNPs predominantly ranged from 5 nm to 15 nm. X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) analyses indicated the presence of graphite. Attenuated total reflectance-fourier transform infrared (ATR-FTIR) spectroscopy detected various functional groups that enabled crosslinking. The CHT/GFCNPs exhibited significantly lower swelling (500%) compared to chitosan film (2300%). Preliminary findings of antibacterial activity demonstrated the effects of the compounds on bacteria with different cell wall structures, namely Gram-positive and Gram-negative bacteria. The CHT/ GFCNPs showed potential antibacterial activity against Staphylococcus aureus, a Grampositive bacteria, compared to Escherichia coli, a Gram-negative bacteria. © Penerbit Universiti Sains Malaysia, 2024. This work is licensed under the terms of the Creative Commons Attribution (CC BY) (http://creativecommons.org/licenses/by/4.0/).
School of Chemical Sciences, Universiti Sains Malaysia, USM, Pulau Pinang, 11800, Malaysia; Faculty of Science and Engineering, Soka University, 1-236 Tangi-machi, Tokyo, Hachioji, 192-8577, Japan; Department of Biomedical Science, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Pulau Pinang, Kepala Batas, 13200, Malaysia; School of Biological Sciences, Universiti Sains Malaysia, USM, Pulau Pinang, 11800, Malaysia; Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang, West Sumatra, Padang, Indonesia; Centre for Energy and Power Electronics Research, Universitas Negeri Padang, West Sumatra, Padang, Indonesia
