Article

Journal of Infrared, Millimeter, and Terahertz Waves

, Volume 32, Issue 4, pp 506-512

Characteristics of Gadolinium Oxide Nanoparticles as Contrast Agents for Terahertz Imaging

  • Dong-Kyu LeeAffiliated withLaboratory for Terahertz Biophotonics, Department of Physics, University of Seoul
  • , Hyeongmun KimAffiliated withLaboratory for Terahertz Biophotonics, Department of Physics, University of Seoul
  • , Taekhoon KimAffiliated withNanochemistry Laboratory, Department of Chemistry, Korea University
  • , Byungkyu ChoAffiliated withNanochemistry Laboratory, Department of Chemistry, Korea University
  • , Kwangyeol LeeAffiliated withNanochemistry Laboratory, Department of Chemistry, Korea University
  • , Joo-Hiuk SonAffiliated withLaboratory for Terahertz Biophotonics, Department of Physics, University of Seoul Email author 

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Abstract

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 water, so that a few ppms of Gd2O3 nanoparticles were distinguished in terms of their power absorption capacity. The results show that the interaction between the terahertz electromagnetic waves and the Gd2O3 nanoparticles is strong enough to allow their exploitation as contrast agents for terahertz medical imaging.

Keywords

Terahertz time-domain spectroscopy Terahertz imaging Gadolinium oxide Nanoparticle