Papers by Keyword: Tumor Hyperthermia

Abstract: This article mainly introduced the preparation and properties of the thermal seed composite. And multiple groups of experiments have been done, which controlled by different content of carbon nanotubes, different surfactants. The results showed that: Fe₃O₄/CNTs can be made through chemical co-precipitation. Using the same surfactant and under the same experimental conditions, the carbon nanotubes’ surface coating is best and most homogeneous, when the content of the carbon nanotubes is 12.5%. When the content of carbon nanotubes is 12.5% and the experimental conditions are same, choosing CTAB as the surfactant, rather than SDS, finally get the better performance of sample. So the optimal parameters for the experiment are that the content of CNTs is 12.5%, and the choice of surfactant is CTAB. At this time, the surface of carbon nanotubes coats uniformly and the magnetic properties meet the requirements of tumor hyperthermia. In addition, as the carbon nanotubes contain varying degrees of nanocarbon particles, graphite fragments, amorphous carbon and other impurities, Therefore, in this paper, the carbon nanotubes are carbon nanotubes which have been purified with concentrated nitric acid.

Abstract: CNTs/HAp thermo-seed material were prepared by a simple and effective coprecipitation and hydrothermal treatment method. The phase structure, composition and morphology of CNTs/HAp composites were examined by X-ray diffraction (XRD), transmission electron microscope (TEM). The results showed that When CNTs content was 10wt%, after hydrothermal treatment, a certain high degree of crystallinity, pure component single HAp layer was obtained on the surface of CNTs successfully. The electromagnetic parameters of CNTs/HAp composites were measured in the range from 0 GHz to 5.0 GHz. The results showed that CNTs/HAp composite had better absorbing properties in the 0-5.0 GHz range. With increasing of CNTs content, the microwave absorbing capacity of CNTs/HAp composite had been gradually strengthened, the absorption peak moved towards high frequency, the bandwidth was increased. When CNTs content was 8wt%, a maximum reflection loss value of -26 dB had been obtained at 3.0 GHz. Therefore, CNTs/HAp composite material is expected as thermo-seed material for tumor hyperthermia.