Optical and electrical properties of amine functionalized CeO2 nanoparticles

• Published in: Chemical physics impact 2024-06, Vol.8, p.100522, Article 100522
• Main Authors: Nagaveni, G.H., Maheshkumar, B., Halse, S.V., Kalasad, M.N.
• Format: Article
• Language: English
• Subjects: CeO2; Electrical; Nanoparticle; Optical conductivity; Size; TEM
• ISSN: 2667-0224; 2667-0224
• DOI: 10.1016/j.chphi.2024.100522

•Current report deals with exploring the optical and electrical conductivity behavior of amine functionalized CeO2 nanoparticles completely based on optical absorption measurement.•For the preparation of amine functionalized CeO2 nanoparticles, oleylamine was used as amine source and to act as stabilizing agent. Aqueous route was incorporated to develop CeO2 nanoparticles.•The effects of varied concentration of cerium on fundamental processes like emission, binding of the functional group and physical parameters viz energy gap, crystallite size, purity of the sample, phase, particle size, elemental composition and nature of the ceria nanoparticles are analyzed.•Based on optical absorption measurements, the optical parameters like optical refractive index and dielectric properties are studied. Conductivity studies including both optical and electrical are discussed. Herein, we report the synthesis of cerium oxide (CeO2) nanoparticles using oleylamine as capping molecule. The method is simple and economical permits to control the desired particle size used for optoelectronic applications. By varying the cerium ion concentration, CeO2 nanoparticles of different particle sizes were synthesized. The optical and electrical conductivity properties were studied by optical absorption and photoluminescence measurements. The structural properties of the CeO2 nanoparticles were studied using powder X-ray diffraction (XRD) and transmission electron microscopy (TEM). The CeO2 nanoparticles exhibit fluorite cubic phase and the particles are in spherical shape, the estimated average particle size ranges from 2 – 7 nm. The calculated optical and electrical conductivity for sample C4 is σopt = 4.325 х 1010 S−1cm−1 and σele = 1.6 х 1012 S/m respectively. The idiosyncratic feature of the Ce4+ ions with attached amine group shows the positive optical conducting behavior of CeO2 nanoparticles. The present results symbolize that the amine groups are proficient to bring out positive results of optical parameters that holds promise for developing novel devices. [Display omitted]