Intrinsic Anti‐Freezing and Unique Phosphorescence of Glassy Hydrogels with Ultrahigh Stiffness and Toughness at Low Temperatures

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(21)

Published: Feb. 23, 2023

Most hydrogels become frozen at subzero temperatures, leading to degraded properties and limited applications. Cryoprotectants are massively employed improve anti-freezing property of hydrogels; however, there accompanied disadvantages, such as varied networks, reduced mechanical properties, the risk cryoprotectant leakage in aqueous conditions. Reported here is glassy hydrogel having intrinsic capacity excellent optical ultra-low temperatures. Supramolecular poly(acrylamide-co-methacrylic acid) with moderate water content (≈50 wt.%) dense hydrogen-bond associations a state room temperature. Since hydrogen bonds strengthened temperature decreases, this gel becomes stronger stiffer, yet still ductile, Young's modulus 900 MPa, tensile strength 30 breaking strain 35% -45 °C. This retains high transparency even liquid nitrogen. It also exhibits unique phosphorescence due presence carbonyl clusters, which further enhanced Further investigations elucidate that related fact most molecules tightly bound confined matrix non-freezable. correlation, validated several systems, provides roadmap develop for widespread applications extreme

Language: Английский

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Regulating ice formation for enhancing frozen food quality: Materials, mechanisms and challenges

Trends in Food Science & Technology, Journal Year: 2023, Volume and Issue: 139, P. 104116 - 104116

Published: July 23, 2023

Freezing reduces the temperature of food system and extends shelf life food. However, inevitable formation ice crystals could impact quality. Small-size are more acceptable in frozen foods than large aggregates with irregular shapes. Undesired not only change structure cause serious quality deterioration, including texture alteration, nutrient loss off-flavour. Ice-regulating materials have been proven to regulate nucleation, growth recrystallization, which show promising applications industry. The theoretical information on formation, particularly nucleation was described. Current ice-regulating materials, such as active proteins, saccharides, natural deep eutectic solvents (NADES), their mechanisms regulating were summarized. Based damage foodstuffs different microstructures, improving also discussed. showed superior actions addition alleviated improved by accelerating or inhibiting freezing. Moreover, current challenges future perspectives regulation for high-efficiency freezing proposed.

Language: Английский

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Control strategies of ice nucleation, growth, and recrystallization for cryopreservation

Acta Biomaterialia, Journal Year: 2022, Volume and Issue: 155, P. 35 - 56

Published: Oct. 30, 2022

Language: Английский

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Observing growth and interfacial dynamics of nanocrystalline ice in thin amorphous ice films

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Jan. 30, 2024

Abstract Ice crystals at low temperatures exhibit structural polymorphs including hexagonal ice, cubic or a hetero-crystalline mixture of the two phases. Despite significant implications structure-dependent roles mechanisms behind growths each polymorph have been difficult to access quantitatively. Using in-situ cryo-electron microscopy and computational ice-dynamics simulations, we directly observe crystalline ice growth in an amorphous film nanoscale thickness, which exhibits three-dimensional nucleation subsequent two-dimensional growth. We reveal that polymorph-dependent kinetics, while anisotropic growth, with accelerated occurring prismatic planes. Fast-growing facets are associated low-density interfaces possess higher surface energy, driving tetrahedral ordering interfacial H 2 O molecules accelerating These findings, based on observations, improve our understanding early stages formation mechanistic interface.

Language: Английский

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Adhesion‐Controlled Heterogeneous Nucleation of Tin Halide Perovskites for Eco‐Friendly Indoor Photovoltaics

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 16, 2024

Abstract The rapid development of the Internet Things (IoT) has accelerated advancement indoor photovoltaics (IPVs) that directly power wireless IoT devices. interest in lead‐free perovskites for IPVs stems from their similar optoelectronic properties to high‐performance lead halide perovskites, but without concerns about toxic leakage environments. However, currently prevalent perovskite IPVs, especially tin (THPs), still exhibit inferior performance, arising uncontrollable crystallization. Here, a novel adhesive bonding strategy is proposed precisely regulating heterogeneous nucleation kinetics THPs by introducing alkali metal fluorides. These ionic adhesives boost work adhesion at buried interface between substrates and film, subsequently reducing contact angle energy barrier nucleation, resulting high‐quality THP films. solar cells achieve an efficiency 20.12% under illumination 1000 lux, exceeding all types successfully powering radio frequency identification‐based sensors.

Language: Английский

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Enhanced Anti/De‐Icing Performance on Rough Surfaces Based on The Synergistic Effect of Fluorinated Resin and Embedded Graphene

Small Methods, Journal Year: 2024, Volume and Issue: 8(7)

Published: Jan. 16, 2024

Abstract Icing negatively impacts various industrial sectors and daily life, often leading to severe safety problems substantial economic losses. In this work, a fluorinated resin coating with embedded graphene nanoflakes is prepared using spin‐coating curing process. The results shows that the ice adhesion strength reduced by ≈97.0% compared mirrored aluminum plate, icing time delayed factor of 46.3 under simulated solar radiation power 96 mW cm −2 (1 sun) at an ambient temperature −15 °C. superior anti/de‐icing properties are mainly attributed synergistic effect low surface energy, rough structure sandblasted which reduces contact area, photothermal effect. Furthermore, hydrogen bonding competition between exposed‐edge oxygen‐containing functional groups water molecules further improves anti‐icing properties. This work proposes facile preparation method prepare coatings excellent properties, offering significant potential for large‐scale engineering applications.

Language: Английский

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Cryoneurolysis: A Comprehensive Review of Applications in Pain Management

Cureus, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 22, 2025

Pain management is an integral part of healthcare, and cryoneurolysis, a technique that uses extreme cold to disrupt nerve conduction, has demonstrated potential in managing both acute chronic pain. It alternative for patients who do not respond traditional pain therapies. This review examines the efficacy, application, mechanism, limitations, challenges, advancements cryoneurolysis. Cryoneurolysis broad applications, including management, reducing opioid dependency, shortening hospital stays. effectively treats conditions like lumbar facet syndrome, phantom limb pain, occipital neuralgia, and, some cases, unresponsiveness Furthermore, it offers values tumor-induced neuropathies postoperative favorable safety profile, presenting low risk minor complications such as infection bruising, which resolve with proper care. Comparative studies indicate induces Wallerian degeneration, effective cooled radiofrequency ablation (CRFA), achieves thermal degradation block transmission, particularly knee osteoarthritis. However, its limitations impede widespread adoption, small sample sizes, study heterogeneity, lack standardized protocols. Future research should focus on large-scale trials, comparative other modalities, developing guidelines enhance clinical outcomes.

Language: Английский

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Cryopreservation of tissues and organs: present, bottlenecks, and future

Frontiers in Veterinary Science, Journal Year: 2023, Volume and Issue: 10

Published: May 25, 2023

Tissue and organ transplantation continues to be an effective measure for saving the lives of certain critically ill patients. The preservation methods that are commonly utilized in clinical practice presently only capable achieving short-term storage, which is insufficient meeting demand transplantation. Ultra-low temperature storage techniques have garnered significant attention due their capacity long-term, high-quality tissues organs. However, experience cryopreserving cells cannot readily extrapolated cryopreservation complex organs, latter still confronts numerous challenges its application. This article summarizes current research progress cryogenic discusses limitations existing studies main obstacles facing finally introduces potential directions future efforts.

Language: Английский

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Biomedical applications of solid-binding peptides and proteins

Materials Today Bio, Journal Year: 2023, Volume and Issue: 19, P. 100580 - 100580

Published: Feb. 15, 2023

Over the past decades, solid-binding peptides (SBPs) have found multiple applications in materials science. In non-covalent surface modification strategies, are a simple and versatile tool for immobilization of biomolecules on vast variety solid surfaces. Especially physiological environments, SBPs can increase biocompatibility hybrid offer tunable properties display with minimal impact their functionality. All these features make attractive manufacturing bioinspired diagnostic therapeutic applications. particular, biomedical such as drug delivery, biosensing, regenerative therapies benefited from introduction SBPs. Here, we review recent literature use proteins We focus where modulating interactions between is crucial. this review, describe proteins, providing background sequence design binding mechanism. then discuss application relevant biomedicine (calcium phosphates, silicates, ice crystals, metals, plastics, graphene). Although limited characterization still represents challenge widespread application, our shows that SBP-mediated bioconjugation be easily introduced into complex designs nanomaterials very different chemistries.

Language: Английский

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Flexible Artificial Tactility with Excellent Robustness and Temperature Tolerance Based on Organohydrogel Sensor Array for Robot Motion Detection and Object Shape Recognition

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 10, 2024

Abstract Hydrogel‐based flexible artificial tactility is equipped to intelligent robots mimic human mechanosensory perception. However, it remains a great challenge for hydrogel sensors maintain flexibility and sensory performances during cyclic loadings at high or low temperatures due water loss freezing. Here, robot developed with robustness based on organohydrogel sensor arrays negligent hysteresis temperature tolerance. Conductive polyaniline chains are interpenetrated through poly(acrylamide‐ co ‐acrylic acid) network glycerin/water mixture interchain electrostatic interactions hydrogen bonds, yielding dissipated energy of 1.58 MJ m −3 , ultralow 1000 loadings. Moreover, the binary solvent provides gels outstanding tolerance from −100 60 °C remain flexible, fatigue resistant, conductive (0.27 S −1 ), highly strain sensitive (GF 3.88) pressure (35.8 MPa ). The manipulator finger dorsa pads simultaneously monitor motions detect distribution exerted by grasped objects. A machine learning model used train system recognize shape objects 100% accuracy. organohydrogels promising novel robots.

Language: Английский

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