3 publications
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Published Subscription
Investigation of Photocatalytic Properties of Microwave Hydrothermal Synthesized ZnO, SnO2 and ZnO/SnO2 NanocompositesBy J.V.S.S.D. Perera, P.G.D.C.K. Karunarathna, Pubudu Samarasekara
Abstract: The coupled ZnO-SnO2 photocatalyst system is one of the coupled semiconductor systems which is extensively employed in photocatalytic applications. ZnO, SnO2 and ZnO/SnO2 composite nanoparticles with three different molar ratios were successfully synthesized via a simple, low cost microwave assisted method using zinc nitrate (Zn(NO3)2.6H2O) and stannous chloride (SnCl2.2H2O) as precursors. The ZnO/SnO2 nanoparticles exhibited higher photocatalytic activities compared to pure ZnO, SnO2 nanoparticles and appreciable highest photocatalytic activity, and …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 12, Issue 2, 2022 · pp. 36–46 Read article →
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A Solution of Fourth Order Perturbed Heisenberg Hamiltonian with Seven Magnetic ParametersBy M.S.M. Farhan, Pubudu Samarasekara
Abstract: For the first time, the fourth order perturbed Heisenberg Hamiltonian with all seven magnetic energy parameters was solved for simple cubic structured ferromagnetic ultrathin films. Spin exchange interaction, magnetic dipole interaction, second order magnetic anisotropy, fourth order magnetic anisotropy, applied magnetic field, demagnetization energy and stress induced anisotropy were considered. 3D graphs of total magnetic energy versusstressinduced anisotropy and angle were plotted for different values of second order and fourth …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 12, Issue 1, 2022 · pp. 1–13 Read article →
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Ferromagnetic thin Films with Simple Cubic Structure as Described by Fourth Order Perturbed Heisenberg HamiltonianBy Pubudu Samarasekara, E.M.P. Ekanayake
Abstract: For the first time, fourth order perturbed Heisenberg Hamiltonian has been applied to study the properties of simple cubic structured ferromagnetic ultrathin films with two spin layers. Only the spin exchange interaction, second order magnetic anisotropy constant and the short-range magnetic dipole interaction were taken into account. Only when the second order anisotropy constant varies from one spin plane to the other spin plane, perturbation becomes nonzero. 3-D plots of …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 10, Issue 3, 2020 · pp. 35–43 Read article →