title: Fluorescent Nanocomposite of Embedded Ceria Nanoparticles in Electrospun Chitosan Nanofibers.
abstract: This paper introduces a detailed optical characterization for a novel fluorescent biodegradable nanocomposite of electro-spun chitosan nanofibers with in-situ embedded cerium oxide (ceria) nanoparticles as the nanocomposite optical fluorescent material. Under near ultra-violet excitation, this synthesized nanocomposite emits a visible green wavelength at nearly 520nmwith different intensities according to the concentration of the embedded fluorescent material; i.e. ceria nanoparticles. This emission is due to the synthesized ceria nanoparticles optical tri-valiant cerium ions ce3+, associated with formed oxygen vacancies with a direct allowed bandgap around 3.5 eV. Optical characteristics such as fluorescence emission intensity, absorbance dispersion, and direct bandgap are presented besides structural characteristics such as FTIR spectroscopy, and SEM analysis. The synthesized optical nanocomposite could be helpful in many further applications such as bio-imaging, biomedical engineering, and environmental optical sensors.
authors.affiliation: Department of Engineering Mathematics and Physics, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt. nader83@vt.edu.|Center of Smart Nanotechnology and Photonics (CSNP), SmartCIResearch Center, Alexandria University, Alexandria, 21544, Egypt. nader83@vt.edu.|USTAR - The Utah Science Technology and Research Agency (USTAR) Bioinnovations Center, Utah State University, Logan, UT, 84341, USA. nader83@vt.edu.
authors.forename: Nader
authors.initials: N
authors.lastname: Shehata
authors.affiliation: Center of Smart Nanotechnology and Photonics (CSNP), SmartCIResearch Center, Alexandria University, Alexandria, 21544, Egypt.|Department of Electrical Engineering, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt.
authors.forename: Effat
authors.initials: E
authors.lastname: Samir
authors.affiliation: Center of Smart Nanotechnology and Photonics (CSNP), SmartCIResearch Center, Alexandria University, Alexandria, 21544, Egypt.|Department of Chemical Engineering, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt.
authors.forename: Soha
authors.initials: S
authors.lastname: Gaballah
authors.affiliation: Department of Engineering Mathematics and Physics, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt.|Center of Smart Nanotechnology and Photonics (CSNP), SmartCIResearch Center, Alexandria University, Alexandria, 21544, Egypt.
authors.forename: Aya
authors.initials: A
authors.lastname: Hamed
authors.affiliation: Center of Smart Nanotechnology and Photonics (CSNP), SmartCIResearch Center, Alexandria University, Alexandria, 21544, Egypt.|Department of Chemical Engineering, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt.
authors.forename: Marwa
authors.initials: M
authors.lastname: Saad
authors.affiliation: Department of Engineering Mathematics and Physics, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt.|Center of Smart Nanotechnology and Photonics (CSNP), SmartCIResearch Center, Alexandria University, Alexandria, 21544, Egypt.
authors.forename: Mohammed
authors.initials: M
authors.lastname: Salah
keywords: Ceria nanoparticles; Electro-spun nanofibers; Electrospinning; Fluorescence