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Observation of Boson Peak of Fragile Baltic Amber Glass by Terahertz Time-Domain Spectroscopy.

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Title: Observation of Boson Peak of Fragile Baltic Amber Glass by Terahertz Time-Domain Spectroscopy.
Authors: Sasaki, Toru1 (AUTHOR), Oh, Soo Han1 (AUTHOR) torusasaki41@gmail.com, Mori, Tatsuya1 (AUTHOR), Kojima, Seiji1 (AUTHOR) kojima@ims.tsukuba.ac.jp
Source: Materials (1996-1944). Dec2024, Vol. 17 Issue 23, p5956. 10p.
Subjects: Terahertz time-domain spectroscopy, Obsidian, Geological time scales, X-ray diffraction, Bosons
Abstract: Amber is a fragile (in Angell's classification) natural glass that has performed maturation processes over geological time. The terahertz dynamics of Baltic amber that was about 40 million years old were studied by terahertz time-domain spectroscopy (THz-TDS) in the frequency range of 0.2 and 6.0 THz. In general, the intensity of a boson peak is weak for fragile glass. In the terahertz transmission spectra of Baltic amber in the previous study, no boson peak was observed upon slow cooling. However, in the present study, upon rapid cooling down to 15 K, the boson peak was observed clearly at 0.36 THz by the suppression of ice nucleation of confined water. The dynamic correlation length determined by the boson peak frequency was compared with the static structure correlation length and the scale of the medium-range order as determined by the first sharp diffraction peak of X-ray diffraction (XRD) in the recent literature. It was found that the dynamic correlation length determined by THz-TDS was closely related to the static correlation length determined by the XRD analysis. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: Observation of Boson Peak of Fragile Baltic Amber Glass by Terahertz Time-Domain Spectroscopy.
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  Data: <searchLink fieldCode="AR" term="%22Sasaki%2C+Toru%22">Sasaki, Toru</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Oh%2C+Soo+Han%22">Oh, Soo Han</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> torusasaki41@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Mori%2C+Tatsuya%22">Mori, Tatsuya</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kojima%2C+Seiji%22">Kojima, Seiji</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> kojima@ims.tsukuba.ac.jp</i>
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Dec2024, Vol. 17 Issue 23, p5956. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Terahertz+time-domain+spectroscopy%22">Terahertz time-domain spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Obsidian%22">Obsidian</searchLink><br /><searchLink fieldCode="DE" term="%22Geological+time+scales%22">Geological time scales</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22Bosons%22">Bosons</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Amber is a fragile (in Angell's classification) natural glass that has performed maturation processes over geological time. The terahertz dynamics of Baltic amber that was about 40 million years old were studied by terahertz time-domain spectroscopy (THz-TDS) in the frequency range of 0.2 and 6.0 THz. In general, the intensity of a boson peak is weak for fragile glass. In the terahertz transmission spectra of Baltic amber in the previous study, no boson peak was observed upon slow cooling. However, in the present study, upon rapid cooling down to 15 K, the boson peak was observed clearly at 0.36 THz by the suppression of ice nucleation of confined water. The dynamic correlation length determined by the boson peak frequency was compared with the static structure correlation length and the scale of the medium-range order as determined by the first sharp diffraction peak of X-ray diffraction (XRD) in the recent literature. It was found that the dynamic correlation length determined by THz-TDS was closely related to the static correlation length determined by the XRD analysis. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/ma17235956
    Languages:
      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 5956
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      – SubjectFull: Terahertz time-domain spectroscopy
        Type: general
      – SubjectFull: Obsidian
        Type: general
      – SubjectFull: Geological time scales
        Type: general
      – SubjectFull: X-ray diffraction
        Type: general
      – SubjectFull: Bosons
        Type: general
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      – TitleFull: Observation of Boson Peak of Fragile Baltic Amber Glass by Terahertz Time-Domain Spectroscopy.
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            NameFull: Sasaki, Toru
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            NameFull: Oh, Soo Han
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            NameFull: Mori, Tatsuya
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            NameFull: Kojima, Seiji
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            – D: 01
              M: 12
              Text: Dec2024
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              Y: 2024
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              Value: 17
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              Value: 23
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            – TitleFull: Materials (1996-1944)
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