Raman spectroscopic features of protective rusts found in world heritage: New development of Albrecht’s vibronic theory
We study unknown features observed in the Raman spectra of protective rusts composed of Fe3O4, discovered during an investigation of concrete buildings on Hashima Island in Nagasaki, Japan, a World Heritage Site. The Raman shift (due to resonance Raman scattering) reveals not only the A1g peak of Fe...
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AIP Publishing LLC
2025-05-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0249853 |
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| author | Shinichi Satoh Satoshi Takaya |
| author_facet | Shinichi Satoh Satoshi Takaya |
| author_sort | Shinichi Satoh |
| collection | DOAJ |
| description | We study unknown features observed in the Raman spectra of protective rusts composed of Fe3O4, discovered during an investigation of concrete buildings on Hashima Island in Nagasaki, Japan, a World Heritage Site. The Raman shift (due to resonance Raman scattering) reveals not only the A1g peak of Fe3O4, which corresponds to the totally symmetric vibration mode, but also an unknown peak at a higher wavenumber, between 700 and 800 cm−1 or higher. Here, we investigate the characteristics of this unknown peak and show that its intensity becomes stronger than that of the original A1g peak as the incident light intensity increases. This phenomenon has not been previously reported in Raman spectroscopy. Therefore, we explore the physical implications of this phenomenon and, as a result, propose an explanation by extending Albrecht’s vibronic theory. In addition, we note that similar higher wavenumber peaks have been observed in previous literature for other materials. Thus, this study represents a new development in Albrecht’s vibronic theory of Raman scattering, which may be applicable not only to protective rust but also to other materials. |
| format | Article |
| id | doaj-art-63a3752ce7c24a18bf893e26f02bffb9 |
| institution | DOAJ |
| issn | 2158-3226 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj-art-63a3752ce7c24a18bf893e26f02bffb92025-08-20T03:19:43ZengAIP Publishing LLCAIP Advances2158-32262025-05-01155055120055120-610.1063/5.0249853Raman spectroscopic features of protective rusts found in world heritage: New development of Albrecht’s vibronic theoryShinichi Satoh0Satoshi Takaya1Osaka Research Institute of Industrial Science and Technology, 2-7-1 Ayumino, Izumi, Osaka, JapanKyoto University, C1-456 Kyotodaigaku-katsura Nishikyo-ku, Kyoto, JapanWe study unknown features observed in the Raman spectra of protective rusts composed of Fe3O4, discovered during an investigation of concrete buildings on Hashima Island in Nagasaki, Japan, a World Heritage Site. The Raman shift (due to resonance Raman scattering) reveals not only the A1g peak of Fe3O4, which corresponds to the totally symmetric vibration mode, but also an unknown peak at a higher wavenumber, between 700 and 800 cm−1 or higher. Here, we investigate the characteristics of this unknown peak and show that its intensity becomes stronger than that of the original A1g peak as the incident light intensity increases. This phenomenon has not been previously reported in Raman spectroscopy. Therefore, we explore the physical implications of this phenomenon and, as a result, propose an explanation by extending Albrecht’s vibronic theory. In addition, we note that similar higher wavenumber peaks have been observed in previous literature for other materials. Thus, this study represents a new development in Albrecht’s vibronic theory of Raman scattering, which may be applicable not only to protective rust but also to other materials.http://dx.doi.org/10.1063/5.0249853 |
| spellingShingle | Shinichi Satoh Satoshi Takaya Raman spectroscopic features of protective rusts found in world heritage: New development of Albrecht’s vibronic theory AIP Advances |
| title | Raman spectroscopic features of protective rusts found in world heritage: New development of Albrecht’s vibronic theory |
| title_full | Raman spectroscopic features of protective rusts found in world heritage: New development of Albrecht’s vibronic theory |
| title_fullStr | Raman spectroscopic features of protective rusts found in world heritage: New development of Albrecht’s vibronic theory |
| title_full_unstemmed | Raman spectroscopic features of protective rusts found in world heritage: New development of Albrecht’s vibronic theory |
| title_short | Raman spectroscopic features of protective rusts found in world heritage: New development of Albrecht’s vibronic theory |
| title_sort | raman spectroscopic features of protective rusts found in world heritage new development of albrecht s vibronic theory |
| url | http://dx.doi.org/10.1063/5.0249853 |
| work_keys_str_mv | AT shinichisatoh ramanspectroscopicfeaturesofprotectiverustsfoundinworldheritagenewdevelopmentofalbrechtsvibronictheory AT satoshitakaya ramanspectroscopicfeaturesofprotectiverustsfoundinworldheritagenewdevelopmentofalbrechtsvibronictheory |