Designing and Building a Novel Magnetic Heating System to Investigate the Dependence of the Magnetic System and the Optical Emission from Nanoparticles
A Magnetic Heating Coil (MHC) has been designed, which has the potential to interact with magnetic Nanoparticles (NPs) to produce local temperature changes. The aim is to design a device capable of studying medically targeted magnetic-fluorescent core-shell NPs (with potential applications in cancer therapy via hyperthermia). Very little is known about how the magnetic-fluorescent NPs respond to magnetic fields and the effect this would have on their optical properties, therefore, considerable work is still required in order to understand the detailed interactions. Several modelling and simulations of the MHC were conducted besides developing the MHC that was designed and built for small samples of NPs (1-10ml volumes). Two different heating coil geometries were examined (coil A and coil B), where the former operates at 83 kHz and the latter operates at 125 kHz. Several tests for fluorescent emission, lifetime and anisotropy with several different NPs samples were conducted. We found that as the temperature increased from 5 °C to 45 °C, the fluorescence lifetime dropped from 3.8 ns to 3.6 ns. Also, the correlation time of the fluorescence in dilute solutions with varying temperatures from 20 °C to 40 °C was investigated, and it was found that decreased from 0.9 ns to 0.6 ns showing that the rotational diffusion of the dye increased and the molecules become more mobile. The MNPs were found to quench the fluorescent emission at high concentrations. Also, the MNPs induce only a small change in a lifetime from 3.9 ns to 3.4 ns.
Magnetic heating coil (MHC), Optical emission, Fluorescent, Magnetic, Nanoparticles, Life-time, Anisotropy, Electronic, Hyperthermia, Coil, Induction
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