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Bailey M, Alunni-Cardinali M, Correa N, Caponi S, Holsgrove T, Barr H, Stone N, Winlove CP, Fioretto D, Palombo F. Viscoelastic properties of biopolymer hydrogels determined by Brillouin spectroscopy: A probe of tissue micromechanics. SCIENCE ADVANCES 2020; 6:eabc1937. [PMID: 33127678 PMCID: PMC7608813 DOI: 10.1126/sciadv.abc1937] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 09/16/2020] [Indexed: 05/09/2023]
Abstract
Many problems in mechanobiology urgently require characterization of the micromechanical properties of cells and tissues. Brillouin light scattering has been proposed as an emerging optical elastography technique to meet this need. However, the information contained in the Brillouin spectrum is still a matter of debate because of fundamental problems in understanding the role of water in biomechanics and in relating the Brillouin data to low-frequency macroscopic mechanical parameters. Here, we investigate this question using gelatin as a model system in which the macroscopic physical properties can be manipulated to mimic all the relevant biological states of matter, ranging from the liquid to the gel and the glassy phase. We demonstrate that Brillouin spectroscopy is able to reveal both the elastic and viscous properties of biopolymers that are central to the structure and function of biological tissues.
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Affiliation(s)
- Michelle Bailey
- University of Exeter, School of Physics and Astronomy, Exeter EX4 4QL, UK
| | | | - Noemi Correa
- University of Exeter, School of Physics and Astronomy, Exeter EX4 4QL, UK
| | - Silvia Caponi
- CNR-IOM-Istituto Officina dei Materiali-Research Unit in Perugia, Department of Physics and Geology, University of Perugia, Perugia I-06123, Italy
| | | | - Hugh Barr
- Gloucestershire Royal Hospital, Gloucester GL1 3NN, UK
| | - Nick Stone
- University of Exeter, School of Physics and Astronomy, Exeter EX4 4QL, UK
| | - C Peter Winlove
- University of Exeter, School of Physics and Astronomy, Exeter EX4 4QL, UK
| | - Daniele Fioretto
- University of Perugia, Department of Physics and Geology, Perugia I-06123, Italy.
| | - Francesca Palombo
- University of Exeter, School of Physics and Astronomy, Exeter EX4 4QL, UK.
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2
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Peng YJ, Cai CT, Wang CJ, Zuo ZF, Liu XZ. Probing the glass transition in reversible cross-linked polymer composites. RSC Adv 2019; 9:15318-15322. [PMID: 35514860 PMCID: PMC9064213 DOI: 10.1039/c9ra01942a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 04/11/2019] [Indexed: 11/21/2022] Open
Abstract
Understanding the nature of glass transition is still a great challenge.
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Affiliation(s)
- Yong-jin Peng
- College of Comprehensive Studies
- Jinzhou Medical University
- Jinzhou 121001
- P. R. China
- College of Chemistry
| | - Chen-ting Cai
- College of Chemistry
- Nankai University
- Tianjin 300071
- P. R. China
| | - Chang-jun Wang
- College of Comprehensive Studies
- Jinzhou Medical University
- Jinzhou 121001
- P. R. China
| | - Zhong-fu Zuo
- Department of Anatomy, Histology and Embryology
- Jinzhou Medical University
- Jinzhou 121001
- P. R. China
- Department of Anatomy, Histology and Embryology
| | - Xue-zheng Liu
- Department of Anatomy, Histology and Embryology
- Jinzhou Medical University
- Jinzhou 121001
- P. R. China
- Liaoning Key Laboratory of Diabetic Cognitive and Perceptive Dysfunction
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3
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Corezzi S, Caponi S, Rossi F, Fioretto D. Stress-Induced Modification of the Boson Peak Scaling Behavior. J Phys Chem B 2013; 117:14477-85. [DOI: 10.1021/jp4054742] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Silvia Corezzi
- Dipartimento
di Fisica, Universitá di Perugia, Via A. Pascoli, Perugia 06123, Italy
| | - Silvia Caponi
- Dipartimento
di Fisica, Universitá di Trento, Via Sommarive 14, Povo (Trento) 38123, Italy
- IOM-CNR
c/o Dipartimento di Fisica, Universitá di Perugia, Via A. Pascoli, Perugia 06123, Italy
| | - Flavio Rossi
- Dipartimento
di Fisica, Universitá di Trento, Via Sommarive 14, Povo (Trento) 38123, Italy
| | - Daniele Fioretto
- Dipartimento
di Fisica, Universitá di Perugia, Via A. Pascoli, Perugia 06123, Italy
- Centro
di Eccellenza sui Materiali Innovativi Nanostrutturati (CEMIN), Universitá di Perugia, via Elce di Sotto 8, Perugia 06123, Italy
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4
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Caponi S, Corezzi S, Fioretto D, Fontana A, Monaco G, Rossi F. Raman-scattering measurements of the vibrational density of states of a reactive mixture during polymerization: effect on the boson peak. PHYSICAL REVIEW LETTERS 2009; 102:027402. [PMID: 19257317 DOI: 10.1103/physrevlett.102.027402] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2008] [Revised: 10/07/2008] [Indexed: 05/27/2023]
Abstract
Raman-scattering measurements are used to follow the modification of the vibrational density of states in a reactive epoxy-amine mixture during isothermal polymerization. Combining them with Brillouin light and inelastic x-ray scattering measurements, we analyze the variations of the boson peak and of the Debye level while the system changes from liquid to glass upon increasing the number of covalent bonds among the constituent molecules. The shift and intensity variation of the boson peak are explained by the modification of the elastic properties throughout the reaction, and a master curve for the boson peak can therefore be obtained. Surprisingly, bond-induced modifications of the structure do not affect this master curve.
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Affiliation(s)
- S Caponi
- Dipartimento di Fisica, Università di Trento, Via Sommarive 14, I-38050 Povo (Trento), Italy
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Fioretto D, Corezzi S, Caponi S, Scarponi F, Monaco G, Fontana A, Palmieri L. Cauchy relation in relaxing liquids. J Chem Phys 2008; 128:214502. [PMID: 18537428 DOI: 10.1063/1.2932105] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The Cauchy-like relation M(infinity) = A + BG(infinity) has recently been found to hold for the high frequency limit values of the longitudinal modulus M(infinity) and transverse modulus G(infinity) of viscoelastic liquids, with B approximately 3 in all the investigated systems. The Brillouin scattering results here reported for curing epoxy systems and thermal glass formers give evidence for the validity of a Cauchy-like relation M(') = A + BG(') for the real part of the elastic moduli measured at finite frequencies. Our results suggest as well the validity of a pure Cauchy relation DeltaM = 3 DeltaG for the relaxation strengths of longitudinal and shear moduli in relaxing liquids.
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Affiliation(s)
- Daniele Fioretto
- CNISM-Dipartimento di Fisica, Università di Perugia, via Pascoli, I-06123 Perugia, Italy.
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6
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Corezzi S, De Michele C, Zaccarelli E, Fioretto D, Sciortino F. A molecular dynamics study of chemical gelation in a patchy particle model. SOFT MATTER 2008; 4:1173-1177. [PMID: 32907259 DOI: 10.1039/b719872h] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report event-driven molecular dynamics simulations of the irreversible gelation of hard ellipsoids of revolution containing several associating groups, characterizing how the cluster size distribution evolves as a function of the extent of reaction, both below and above the gel point. We find that over a very large interval of values of the extent of reaction, parameter-free mean-field predictions are extremely accurate, providing evidence that in this model the Ginzburg zone near the gel point, where non-mean field effects are important, is very limited. We also find that the Flory's hypothesis for the post-gelation regime properly describes the connectivity of the clusters even if the long-time limit of the extent of reaction does not reach the fully reacted state. This study shows that irreversibly aggregating asymmetric hard-core patchy particles may provide a close realization of the mean-field model, for which available theoretical predictions may help control the structure and the connectivity of the gel state. Besides chemical gels, the model is relevant to network-forming soft materials like systems with bioselective interactions, functionalized molecules and patchy colloids.
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Affiliation(s)
- Silvia Corezzi
- CNR-INFM Polylab, Università di Pisa, Largo Pontercorvo 3, Pisa, I-56127, Italy and Dipartimento di Fisica, Università di Perugia, Via A. Pascoli, Perugia, I-06100, Italy
| | - Cristiano De Michele
- CNR-INFM CRS Soft, Università di Roma, 'La Sapienza', P. le A. Moro 2, Roma, I-00185, Italy and Dipartimento di Fisica, Università di Roma, 'La Sapienza', P. le A. Moro 2, Roma, I-00185, Italy
| | - Emanuela Zaccarelli
- CNR-INFM CRS Soft, Università di Roma, 'La Sapienza', P. le A. Moro 2, Roma, I-00185, Italy and Dipartimento di Fisica, Università di Roma, 'La Sapienza', P. le A. Moro 2, Roma, I-00185, Italy
| | - Daniele Fioretto
- Dipartimento di Fisica, Università di Perugia, Via A. Pascoli, Perugia, I-06100, Italy and CNR-INFM CRS Soft, Università di Roma, 'La Sapienza', P. le A. Moro 2, Roma, I-00185, Italy
| | - Francesco Sciortino
- CNR-INFM CRS Soft, Università di Roma, 'La Sapienza', P. le A. Moro 2, Roma, I-00185, Italy and Dipartimento di Fisica, Università di Roma, 'La Sapienza', P. le A. Moro 2, Roma, I-00185, Italy
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7
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Volponi R, Corezzi S, Fioretto D. Correlation between Structural Relaxation and Distribution of Particle Clusters in Glass-Forming Epoxy−Amine Mixtures Undergoing Step Polymerization. Macromolecules 2007. [DOI: 10.1021/ma0627323] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- R. Volponi
- Dipartimento di Fisica, Università di Perugia, Via A. Pascoli, I-06123, Perugia, Italy, and CNR-INFM CRS-Soft, c/o Università di Roma “La Sapienza”, P. A. Moro 2, I-00185 Roma, Italy
| | - S. Corezzi
- Dipartimento di Fisica, Università di Perugia, Via A. Pascoli, I-06123, Perugia, Italy, and CNR-INFM CRS-Soft, c/o Università di Roma “La Sapienza”, P. A. Moro 2, I-00185 Roma, Italy
| | - D. Fioretto
- Dipartimento di Fisica, Università di Perugia, Via A. Pascoli, I-06123, Perugia, Italy, and CNR-INFM CRS-Soft, c/o Università di Roma “La Sapienza”, P. A. Moro 2, I-00185 Roma, Italy
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