eng Science and Education Publishing Journal of Materials Physics and Chemistry 2333-4444 2019-11-27 7 1 29 45 10.12691/jmpc-7-1-4 JMPC2019714 article Alireza Heidari Scholar.Researcher.Scientist@gmail.com; 1 2 Katrina Schmitt 2 Maria Henderson 2 Elizabeth Besana 2 Faculty of Chemistry, California South University, 14731 Comet St. Irvine, CA 92604, USA In the current study, thermoplasmonic characteristics of Lanthanum nanoparticles with spherical, core-shell and rod shapes are investigated. In order to investigate these characteristics, interaction of synchrotron radiation emission as a function of the beam energy and Lanthanum nanoparticles were simulated using 3D finite element method. Firstly, absorption and extinction cross sections were calculated. Then, increases in temperature due to synchrotron radiation emission as a function of the beam energy absorption were calculated in Lanthanum nanoparticles by solving heat equation. The obtained results show that Lanthanum nanorods are more appropriate option for using in optothermal human cancer cells, tissues and tumors treatment method. http://pubs.sciepub.com/jmpc/7/1/4/jmpc-7-1-4.pdf Lanthanum Nanoparticles Scanning Electron Microscope (SEM) 3D Finite Element Method (FEM) Heat Transfer Equation Optothermal Heat Distribution Thermoplasmonic Lanthanum Nanorods Human Cancer Cells Tissues and Tumors Treatment Simulation Synchrotron Radiation Emission Function Beam Energy