{"title":"Brillouin Scattering in Collagen-Based Hydrogels","authors":"A. V. Laktionova, V. A. Zykova, N. V. Surovtsev","doi":"10.1134/S1062873824708985","DOIUrl":null,"url":null,"abstract":"<p>Viscoelastic properties of collagen hydrogels with different protein content (from 0 to 100%) was studied by Brillouin spectroscopy as a model system of biological tissue. From the analysis of the Brillouin spectra, the dependencies of the Brillouin peak width (FWHM) and the value of the gigahertz elastic modulus as a function of the protein concentration in the hydrogel were determined. It is shown that the behavior of the elastic modulus, which changes by almost an order of magnitude, is described with good accuracy in the full range of concentrations considered by the Reuss model. Analysis of the behavior of the Brillouin line width revealed a nontrivial behavior of the FWHM value with increasing protein concentration (FWHM increased almost 8 times), with a maximum at a collagen content of ∼70%. The discovered behavior can be caused by both the heterogeneity of the samples on scales of ∼100 nm during hydrogel dehydration and the influence of the relaxation spectrum on the Brillouin peak.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"88 2 supplement","pages":"S180 - S184"},"PeriodicalIF":0.4800,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of the Russian Academy of Sciences: Physics","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1134/S1062873824708985","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Physics and Astronomy","Score":null,"Total":0}
引用次数: 0
Abstract
Viscoelastic properties of collagen hydrogels with different protein content (from 0 to 100%) was studied by Brillouin spectroscopy as a model system of biological tissue. From the analysis of the Brillouin spectra, the dependencies of the Brillouin peak width (FWHM) and the value of the gigahertz elastic modulus as a function of the protein concentration in the hydrogel were determined. It is shown that the behavior of the elastic modulus, which changes by almost an order of magnitude, is described with good accuracy in the full range of concentrations considered by the Reuss model. Analysis of the behavior of the Brillouin line width revealed a nontrivial behavior of the FWHM value with increasing protein concentration (FWHM increased almost 8 times), with a maximum at a collagen content of ∼70%. The discovered behavior can be caused by both the heterogeneity of the samples on scales of ∼100 nm during hydrogel dehydration and the influence of the relaxation spectrum on the Brillouin peak.
期刊介绍：
Bulletin of the Russian Academy of Sciences: Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It presents full-text articles (regular, letters to the editor, reviews) with the most recent results in miscellaneous fields of physics and astronomy: nuclear physics, cosmic rays, condensed matter physics, plasma physics, optics and photonics, nanotechnologies, solar and astrophysics, physical applications in material sciences, life sciences, etc. Bulletin of the Russian Academy of Sciences: Physics focuses on the most relevant multidisciplinary topics in natural sciences, both fundamental and applied. Manuscripts can be submitted in Russian and English languages and are subject to peer review. Accepted articles are usually combined in thematic issues on certain topics according to the journal editorial policy. Authors featured in the journal represent renowned scientific laboratories and institutes from different countries, including large international collaborations. There are globally recognized researchers among the authors: Nobel laureates and recipients of other awards, and members of national academies of sciences and international scientific societies.
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