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Qin K, Eschenbrenner C, Ginot F, Dedovets D, Coradin T, Deville S, Fernandes FM. Unveiling Cells' Local Environment during Cryopreservation by Correlative In Situ Spatial and Thermal Analyses. J Phys Chem Lett 2020; 11:7730-7738. [PMID: 32841035 DOI: 10.1021/acs.jpclett.0c01729] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Cryopreservation is the only fully established procedure to extend the lifespan of living cells and tissues, a key to activities spanning from fundamental biology to clinical practice. Despite its prevalence and impact, the central aspects of cryopreservation, such as the cell's physicochemical environment during freezing, remain elusive. Here we address that question by coupling in situ microscopic directional freezing to visualize cells and their surroundings during freezing with the freezing-medium phase diagram. We extract the freezing-medium spatial distribution in cryopreservation, providing a tool to describe the cell vicinity at any point during freezing. We show that two major events define the cells' local environment over time: the interaction with the moving ice front and the interaction with the vitreous moving front, a term we introduce here. Our correlative strategy may be applied to cells relevant to clinical research and practice and may help in the design of new cryoprotective media based on local physicochemical cues.
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Affiliation(s)
- Kankan Qin
- Sorbonne Université, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris, F-75005 Paris, France
| | - Corentin Eschenbrenner
- Sorbonne Université, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris, F-75005 Paris, France
| | - Felix Ginot
- Laboratoire de Synthèse et Fonctionnalisation des Céramiques, UMR 3080 CNRS/Saint-Gobain CREE, Saint-Gobain Research Provence, 84300 Cavaillon, France
| | - Dmytro Dedovets
- Laboratoire de Synthèse et Fonctionnalisation des Céramiques, UMR 3080 CNRS/Saint-Gobain CREE, Saint-Gobain Research Provence, 84300 Cavaillon, France
| | - Thibaud Coradin
- Sorbonne Université, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris, F-75005 Paris, France
| | - Sylvain Deville
- Laboratoire de Synthèse et Fonctionnalisation des Céramiques, UMR 3080 CNRS/Saint-Gobain CREE, Saint-Gobain Research Provence, 84300 Cavaillon, France
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, 69622 Villeurbanne, France
| | - Francisco M Fernandes
- Sorbonne Université, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris, F-75005 Paris, France
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Wu S, Li L, Xue H, Liu K, Fan Q, Bai G, Wang J. Size Controllable, Transparent, and Flexible 2D Silver Meshes Using Recrystallized Ice Crystals as Templates. ACS NANO 2017; 11:9898-9905. [PMID: 28837316 DOI: 10.1021/acsnano.7b03821] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Ice templates have been widely utilized for the preparation of porous materials due to the obvious advantages, such as environmentally benign and applicable to a wide range of materials. However, it remains a challenge to have controlled pore size as well as dimension of the prepared porous materials with the conventional ice template, since it often employs the kinetically not-stable growing ice crystals as the template. For example, there is no report so far for the preparation of 2D metal meshes with tunable pore size based on the ice template, although facile and eco-friendly prepared metal meshes are highly desirable for wearable electronics. Here, we report the preparation of 2D silver meshes with tunable mesh size employing recrystallized ice crystals as templates. Ice recrystallization is a kinetically stable process; therefore, the grain size of recrystallized ice crystals can be easily tuned, e.g., by adding different salts and changing the annealing temperature. Consequently, the size and line width of silver meshes obtained after freeze-drying can be easily adjusted, which in turn varied the conductivity of the obtained 2D silver film. Moreover, the silver meshes are transparent and display stable conductivity after the repeated stretching and bending. It can be envisioned that this approach for the preparation of 2D conducting films is of practical importance for wearable electronics. Moreover, this study provides a generic approach for the fabrication of 2D meshes with a controllable pore size.
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Affiliation(s)
- Shuwang Wu
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, PR China
- University of Chinese Academy of Sciences , Beijing 100049, PR China
| | - Linhai Li
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, PR China
- University of Chinese Academy of Sciences , Beijing 100049, PR China
| | - Han Xue
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, PR China
- University of Chinese Academy of Sciences , Beijing 100049, PR China
| | - Kai Liu
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, PR China
- University of Chinese Academy of Sciences , Beijing 100049, PR China
| | - Qingrui Fan
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, PR China
- University of Chinese Academy of Sciences , Beijing 100049, PR China
| | - Guoying Bai
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, PR China
- University of Chinese Academy of Sciences , Beijing 100049, PR China
| | - Jianjun Wang
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, PR China
- University of Chinese Academy of Sciences , Beijing 100049, PR China
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