Characterization of Proton-Irradiated Polyaniline Nanoparticles Using Terahertz Thermal Spectroscopy
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...
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MDPI AG
2021-06-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/11/7/765 |
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| author | Seung Jae Oh Yoochan Hong Ki-Young Jeong Inhee Maeng Jin-Suck Suh Jaemoon Yang Yong-Min Huh |
| author_facet | Seung Jae Oh Yoochan Hong Ki-Young Jeong Inhee Maeng Jin-Suck Suh Jaemoon Yang Yong-Min Huh |
| author_sort | Seung Jae Oh |
| collection | DOAJ |
| description | 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 10<sup>13</sup> particles/cm<sup>2</sup>. 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 10<sup>13</sup> particles/cm<sup>2</sup>. |
| first_indexed | 2024-03-10T09:56:38Z |
| format | Article |
| id | doaj.art-4624959387014996aaebf1b6bc85ccde |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T09:56:38Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-4624959387014996aaebf1b6bc85ccde2023-11-22T02:18:55ZengMDPI AGCrystals2073-43522021-06-0111776510.3390/cryst11070765Characterization of Proton-Irradiated Polyaniline Nanoparticles Using Terahertz Thermal SpectroscopySeung Jae Oh0Yoochan Hong1Ki-Young Jeong2Inhee Maeng3Jin-Suck Suh4Jaemoon Yang5Yong-Min Huh6YUHS-KRIBB Medical Convergence Research Institute, College of Medicine, Yonsei University, Seoul 03722, KoreaDepartment of Medical Devices, Korea Institute of Machinery and Materials (KIMM), Daegu 42994, KoreaYUHS-KRIBB Medical Convergence Research Institute, College of Medicine, Yonsei University, Seoul 03722, KoreaYUHS-KRIBB Medical Convergence Research Institute, College of Medicine, Yonsei University, Seoul 03722, KoreaYUHS-KRIBB Medical Convergence Research Institute, College of Medicine, Yonsei University, Seoul 03722, KoreaDepartment of Radiology, College of Medicine, Yonsei University, 50-1 Yonsei-ro, Seodaemun-gu, Seoul 03722, KoreaYUHS-KRIBB Medical Convergence Research Institute, College of Medicine, Yonsei University, Seoul 03722, KoreaIn 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 10<sup>13</sup> particles/cm<sup>2</sup>. 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 10<sup>13</sup> particles/cm<sup>2</sup>.https://www.mdpi.com/2073-4352/11/7/765terahertz spectroscopypolyanilinethermal spectroscopyproton beam |
| spellingShingle | Seung Jae Oh Yoochan Hong Ki-Young Jeong Inhee Maeng Jin-Suck Suh Jaemoon Yang Yong-Min Huh Characterization of Proton-Irradiated Polyaniline Nanoparticles Using Terahertz Thermal Spectroscopy Crystals terahertz spectroscopy polyaniline thermal spectroscopy proton beam |
| title | Characterization of Proton-Irradiated Polyaniline Nanoparticles Using Terahertz Thermal Spectroscopy |
| title_full | Characterization of Proton-Irradiated Polyaniline Nanoparticles Using Terahertz Thermal Spectroscopy |
| title_fullStr | Characterization of Proton-Irradiated Polyaniline Nanoparticles Using Terahertz Thermal Spectroscopy |
| title_full_unstemmed | Characterization of Proton-Irradiated Polyaniline Nanoparticles Using Terahertz Thermal Spectroscopy |
| title_short | Characterization of Proton-Irradiated Polyaniline Nanoparticles Using Terahertz Thermal Spectroscopy |
| title_sort | characterization of proton irradiated polyaniline nanoparticles using terahertz thermal spectroscopy |
| topic | terahertz spectroscopy polyaniline thermal spectroscopy proton beam |
| url | https://www.mdpi.com/2073-4352/11/7/765 |
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