Open AccessOptical and Thermophysical Characterization of Fe3O4nanoparticle
Author(s) -
F Horia.,
Khaled Easawi,
Reda Khalil,
Said Abdallah,
M.K. El-Mansy,
S. Negm
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/956/1/012016
Subject(s) - thermal effusivity , nanoparticle , materials science , analytical chemistry (journal) , thermal diffusivity , transmission electron microscopy , thermal conductivity , nanotechnology , thermal , chemistry , thermodynamics , thermal resistance , composite material , physics , chromatography , thermal contact conductance
The size dependence of optical and, thermophysical properties of Fe 3 O 4 nanoparticle (NPs) has been investigated. Three samples of Fe 3 O 4 NPs with different sizes were prepared by the Co-precipitation method and labeled a, b and c. The UV- vis spectra shifted toward the lower energy with increasing the particles size. The energy bandgaps of the synthesized Fe 3 O 4 NPs are 1.84 ev,1,73 ev, and 1,47 ev for a, b and c respectively. The sizes of the nanoparticles were estimated using the effective mass approximation (EMA) model, and are 10.7 nm, 20.56 nm, and 30.43 nm. These values are comparable to those found by transmission electron microscope (TEM) and X-ray diffraction (XRD). The Photoacoustic (PA) technique was used to research Fe 3 O 4 NPs for thermal diffusivity (α), thermal effusivity (e), and thermal conductivity (k). The determined values of α, e, and k increase as the size of nanoparticles rises and decreases from the bulk by about 33%.