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Characterization of Proton-Irradiated Polyaniline Nanoparticles Using Terahertz Thermal Spectroscopy

 Seung Jae Oh  ;  Yoochan Hong  ;  Ki-Young Jeong  ;  Inhee Maeng  ;  Jin-Suck Suh  ;  Jaemoon Yang  ;  Yong-Min Huh 
 CRYSTALS, Vol.11(7) : 765, 2021-07 
Journal Title
Issue Date
terahertz spectroscopy ; polyaniline ; thermal spectroscopy ; proton beam
In this study, we investigated the changes in the molecular structure of polyaniline (PANI) nanoparticles illuminated by a proton beam using terahertz (THz) thermal spectroscopy based on the terahertz time-domain spectroscopy technique. PANI nanoparticles in water were exposed to a proton beam of 35 MeV energy with a particle fluence of 1013 particles/cm2. The photothermal properties of this solution of PANI nanoparticles were characterized using THz thermal spectroscopy. We measured the changes in the amplitudes of the reflected THz pulses to identify the variations in temperature induced by the photothermal effects of the PANI nanoparticle solution. The amplitude of a reflected THz pulse of the PANI solution not exposed to the proton beam increased when illuminated by an infrared light source, whereas that of THz signals of the PANI solution exposed to the proton beam hardly exhibited any changes. This implies that the molecular structure of PANI nanoparticles can be varied by a proton beam with a particle fluence above 1013 particles/cm2.
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1. College of Medicine (의과대학) > Research Institute (부설연구소) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
Yonsei Authors
Maeng, In hee(맹인희)
Suh, Jin Suck(서진석) ORCID logo https://orcid.org/0000-0001-9455-9240
Yang, Jae Moon(양재문) ORCID logo https://orcid.org/0000-0001-7365-0395
Oh, Seung Jae(오승재)
Huh, Yong Min(허용민) ORCID logo https://orcid.org/0000-0002-9831-4475
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