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Pregled bibliografske jedinice broj: 632561

The anhydrous solid trehalose: low-temperature EPR study of glassy and boson peak modes


Kveder, Marina; Šarić, Iva; Merunka, Dalibor; Jokić, Milan; Valić, Srećko; Rakvin, Boris
The anhydrous solid trehalose: low-temperature EPR study of glassy and boson peak modes // Journal of non-crystalline solids, 375 (2013), 19-24 doi:10.1016/j.jnoncrysol.2013.05.016 (međunarodna recenzija, članak, znanstveni)


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Naslov
The anhydrous solid trehalose: low-temperature EPR study of glassy and boson peak modes

Autori
Kveder, Marina ; Šarić, Iva ; Merunka, Dalibor ; Jokić, Milan ; Valić, Srećko ; Rakvin, Boris

Izvornik
Journal of non-crystalline solids (0022-3093) 375 (2013); 19-24

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
glassy state; electron spin-lattice relaxation time; boson peak; SPM

Sažetak
Electron spin-lattice relaxation times ( T1 ) were measured by X- band electron paramagnetic resonance (EPR) spectroscopy in irradiated trehalose glass (TR-G) and trehalose-β crystalline state (TR-C) from 5 – 290 K. Throughout the whole temperature interval studied a consistently shorter T1 was observed in TR-G than TR- C while the largest difference was detected below ca. 80 K. Here, the theoretical analysis within the soft potential model pointed to the two mechanisms responsible for a more efficient energy exchange between the spin system and the lattice in TR-G: the thermally activated dynamics of glassy modes and the Raman process with boson peak (BP) modes. In this context, the glassy polymorph of anhydrous trehalose corroborates the idea that the boson peak, being a universal property of amorphous/disordered solids, can be studied by EPR even at X- band frequencies. It is further suggested that the mechanisms, involving glassy/soft/BP modes, which provide additional channel for the electron spin coupling with the lattice in glassy as compared to the crystalline state, could be proposed as a universal phenomenon aiming to explain the electron spin relaxation in disordered matrices at temperatures above a few Kelvin in general.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekti:
062-0000000-3209 - Strukturne i dinamičke promjene u sustavima makromolekula (Valić, Srećko, MZOS ) ( POIROT)
098-0982904-2912 - Samo-udruživanje u gelovima i sinteza funkcionalnih hibridnih materijala (Frkanec, Leo, MZOS ) ( POIROT)
098-0982915-2939 - Molekulska struktura i dinamika sustava s paramagnetskim česticama (Ilakovac-Kveder, Marina, MZOS ) ( POIROT)

Ustanove:
Medicinski fakultet, Rijeka,
Institut "Ruđer Bošković", Zagreb,
Građevinski fakultet, Rijeka

Poveznice na cjeloviti tekst rada:

doi www.sciencedirect.com ac.els-cdn.com dx.doi.org

Citiraj ovu publikaciju:

Kveder, Marina; Šarić, Iva; Merunka, Dalibor; Jokić, Milan; Valić, Srećko; Rakvin, Boris
The anhydrous solid trehalose: low-temperature EPR study of glassy and boson peak modes // Journal of non-crystalline solids, 375 (2013), 19-24 doi:10.1016/j.jnoncrysol.2013.05.016 (međunarodna recenzija, članak, znanstveni)
Kveder, M., Šarić, I., Merunka, D., Jokić, M., Valić, S. & Rakvin, B. (2013) The anhydrous solid trehalose: low-temperature EPR study of glassy and boson peak modes. Journal of non-crystalline solids, 375, 19-24 doi:10.1016/j.jnoncrysol.2013.05.016.
@article{article, author = {Kveder, Marina and \v{S}ari\'{c}, Iva and Merunka, Dalibor and Joki\'{c}, Milan and Vali\'{c}, Sre\'{c}ko and Rakvin, Boris}, year = {2013}, pages = {19-24}, DOI = {10.1016/j.jnoncrysol.2013.05.016}, keywords = {glassy state, electron spin-lattice relaxation time, boson peak, SPM}, journal = {Journal of non-crystalline solids}, doi = {10.1016/j.jnoncrysol.2013.05.016}, volume = {375}, issn = {0022-3093}, title = {The anhydrous solid trehalose: low-temperature EPR study of glassy and boson peak modes}, keyword = {glassy state, electron spin-lattice relaxation time, boson peak, SPM} }
@article{article, author = {Kveder, Marina and \v{S}ari\'{c}, Iva and Merunka, Dalibor and Joki\'{c}, Milan and Vali\'{c}, Sre\'{c}ko and Rakvin, Boris}, year = {2013}, pages = {19-24}, DOI = {10.1016/j.jnoncrysol.2013.05.016}, keywords = {glassy state, electron spin-lattice relaxation time, boson peak, SPM}, journal = {Journal of non-crystalline solids}, doi = {10.1016/j.jnoncrysol.2013.05.016}, volume = {375}, issn = {0022-3093}, title = {The anhydrous solid trehalose: low-temperature EPR study of glassy and boson peak modes}, keyword = {glassy state, electron spin-lattice relaxation time, boson peak, SPM} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Citati:





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