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For the application of gadolinium oxide (Gd2O3) nanoparticles as terahertz contrast agents, their optical properties in a solvent were studied using terahertz time-domain spectroscopy. The power absorption and refractive index of the samples were measured with various concentrations of nanoparticles. The power absorption was extremely large, as much as three orders of magnitude higher than that of...
We measured the dynamics of aqueous biomaterial mixtures using terahertz time-domain spectroscopy. The mixtures were divided into water and other electrolyte parts in mass fractions for analysis. The optical constants of the electrolytes, excluding water, were obtained by applying the ideal mixture equation and fitted with the modified double Debye model. We found that the reorientation and hydrogen-bond...
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