Materials Today最新文献_第10页

Advances in organoid-on-a-chip for recapitulation of human physiological events 用于人体生理事件再现的类器官芯片研究进展

IF 21.1 1区材料科学

Materials Today Pub Date : 2025-02-19 DOI: 10.1016/j.mattod.2025.02.002

Bumjun Park , Junseo Park , Sanghun Han , Taeyeon Kwon , Ju Yong Sung , Jigyeong Kim , Moein Safarkhani , Kyung-Hyun Min , Eun-Ho Lee , Sung-Min Kang , Yun Suk Huh

{"title":"Advances in organoid-on-a-chip for recapitulation of human physiological events","authors":"Bumjun Park , Junseo Park , Sanghun Han , Taeyeon Kwon , Ju Yong Sung , Jigyeong Kim , Moein Safarkhani , Kyung-Hyun Min , Eun-Ho Lee , Sung-Min Kang , Yun Suk Huh","doi":"10.1016/j.mattod.2025.02.002","DOIUrl":"10.1016/j.mattod.2025.02.002","url":null,"abstract":"<div><div>The transition to 3D cell culture has garnered attention because it offers accurate information for the development of new drugs, drug disease modeling, cancer treatment, and personalized medicine research, which is important for providing human-like physiological environment-mimicked <em>in vivo</em> models by replacing conventional cell culture systems. In particular, organoids form complex structures of various organs derived from stem cells that involve the convergence of diverse heterogeneous technologies to imitate a more accurate internal body environment. In this review, we discuss trends in organoid-on-a-chip, which can precisely mimic organ-specific functions and disease mechanisms by providing real-time controllable dynamic culture environments by combining organoid culture and microfluidic systems. Organoid-on-a-chip is an innovative platform that precisely recapitulate the physiological environments of the human body by integrating the complex structure of 3D organoids with microfluidic system. The culture of organoids within the microfluidic platform is demonstrated by evaluating key parameters such as cell composition, extracellular matrix (ECM), and synthetic environmental factors. The organoid-on-a-chip further implements the structural and functional features of different organs including static and dynamic models, which provide physiological microenvironments to address the ethical concerns of <em>in vivo</em> experiments. In particular, recent advances in multi organoid-on-a-chip are introduced to analyze metabolism and toxicity of drugs through organ to organ interconnections, elucidating the potential to achieve human-on-a-chip technologies. Therefore, organoid-on-a-chip platforms are expected to revolutionize biomedical research and personalized medicine by accurately reproducing the human environment <em>in vitro</em>.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"84 ","pages":"Pages 75-94"},"PeriodicalIF":21.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An ultrasound-responsive hydrogel with piezoelectric-enhanced electrokinetic effect accelerates neurovascular regeneration for diabetic wound healing 一种具有压电增强电动力学效应的超声响应水凝胶加速糖尿病伤口愈合的神经血管再生

IF 21.1 1区材料科学

Materials Today Pub Date : 2025-02-18 DOI: 10.1016/j.mattod.2025.02.003

Fang Wang , Jiajun Qiu , Shiwei Guan , Shuhan Chen , Xiaoshuang Nie , Zhengqian Fu , Fang-Zhou Yao , Wen Gong , Ke Wang , Xuanyong Liu

{"title":"An ultrasound-responsive hydrogel with piezoelectric-enhanced electrokinetic effect accelerates neurovascular regeneration for diabetic wound healing","authors":"Fang Wang , Jiajun Qiu , Shiwei Guan , Shuhan Chen , Xiaoshuang Nie , Zhengqian Fu , Fang-Zhou Yao , Wen Gong , Ke Wang , Xuanyong Liu","doi":"10.1016/j.mattod.2025.02.003","DOIUrl":"10.1016/j.mattod.2025.02.003","url":null,"abstract":"<div><div>Diabetic wound healing is hindered by the critical effects of poor local vascularization, peripheral neuropathy, and bacterial infection, which remains a formidable challenge. Available wound dressings suffer from limited therapeutic efficacy owing to the inadequate addressing of neurovascular lesions. Herein, an ultrasound-responsive composite hydrogel composed of a gelatin/polyvinyl alcohol (PVA) interpenetrating polymer network doped with piezoelectric (K,Na)NbO<sub>3</sub> (KNN) nanocrystals and reduced graphene oxide was rationally designed to realize sonoelectric conversion to accelerate diabetic wound healing by facilitating local neurovascular regeneration. The composite hydrogels present exceptional self-healing, skin-adhesive, and conductive properties. More encouragingly, this hydrogel is endowed with excellent sonoelectric conversion performance by piezoelectric-enhanced electrokinetic effect under ultrasound irradiation. The results <em>in vitro</em> and <em>in vivo</em> demonstrate that the composite hydrogel combined with ultrasound irradiation can enhance the angiogenesis of endothelial cells, upregulate the neurotrophic effects of Schwann cells to support neurite growth, and inhibit bacterial activities, resulting in significant local angiogenesis and nerve regeneration in diabetic wounds. This strategy offers an efficacious approach and leads the development of electroactive biomaterials for diabetic wound treatment.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"84 ","pages":"Pages 48-64"},"PeriodicalIF":21.1,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Additively manufactured liquid metal–based piezoresistive device with dual functions of force sensing and mechanical energy absorption 增材制造具有力传感和机械能吸收双重功能的液态金属压阻器件

IF 21.1 1区材料科学

Materials Today Pub Date : 2025-02-13 DOI: 10.1016/j.mattod.2025.01.018

Ruiying Luo , Hongzhi Wu , Yijia Liu , Chunze Yan , Kun Zhou , Yusheng Shi

{"title":"Additively manufactured liquid metal–based piezoresistive device with dual functions of force sensing and mechanical energy absorption","authors":"Ruiying Luo , Hongzhi Wu , Yijia Liu , Chunze Yan , Kun Zhou , Yusheng Shi","doi":"10.1016/j.mattod.2025.01.018","DOIUrl":"10.1016/j.mattod.2025.01.018","url":null,"abstract":"<div><div>Although liquid metals are renowned for their exceptional stimulus-responsive properties, their potential for functionalization remains constrained when relying solely on simple deformations. Recent progress in additive manufacturing has enabled the simultaneous programming of both materials and structures, facilitating the development of various functional devices based on liquid metals. However, these devices typically exhibit only a single functionality. This work proposes an approach for the fabrication of multi-functional devices by uniformly coating GaIn liquid metal onto the surface of lattice structures produced via laser powder bed fusion. The resulting flexible piezoresistive device not only responds to pressure by altering its resistance but also exhibits significant mechanical energy absorption capabilities. Through comprehensive analysis of the device’s sensing performance and resistance variation during structural densification, we observed outstanding characteristics, including high sensitivity, a rapid response time of 58 ms, a maximum mechanical energy absorption capacity of 40.1 kJ·m<sup>−3</sup>, and a cycle life exceeding 12,000 cycles. Notably, a sudden change in resistance consistently occurs during the lattice structure’s densification process, making the device highly effective for protecting delicate components. This work extends beyond the intrinsic stimulus-responsive characteristics of liquid metals, presenting a strategy in the design and manufacturing of piezoresistive devices through material and structural innovation, with promising potential for a wide array of applications.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"84 ","pages":"Pages 65-74"},"PeriodicalIF":21.1,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enabling 3D printability and vascular morphogenesis with double network dynamic hydrogels 通过双网络动态水凝胶实现3D打印性和血管形态发生

IF 21.1 1区材料科学

Materials Today Pub Date : 2025-02-12 DOI: 10.1016/j.mattod.2025.01.019

Runze Xu , Bohan Dou , Shuang Yu , Ziyu Wang , Yanli Zhang , Ling Leng , Liliang Ouyang , Wei Sun

{"title":"Enabling 3D printability and vascular morphogenesis with double network dynamic hydrogels","authors":"Runze Xu , Bohan Dou , Shuang Yu , Ziyu Wang , Yanli Zhang , Ling Leng , Liliang Ouyang , Wei Sun","doi":"10.1016/j.mattod.2025.01.019","DOIUrl":"10.1016/j.mattod.2025.01.019","url":null,"abstract":"<div><div>Hydrogels are crucial biomaterial candidates for tissue engineering and biofabrication applications. The matrix dynamics of hydrogels have recently been demonstrated to contribute to vascular morphogenesis, which is significant for tissue vascularization. However, such dynamic hydrogels are usually mechanically non-stable during culture due to bonding dissociation and cell-mediated degradation, which hinder their usage in advanced biofabricaiton technologies, such as 3D bioprinting. Here, we introduce a double-network dynamic hydrogel (DNDH) bioink strategy to integrate the structural printability, stability, and induction of vascular morphogenesis. Specifically, we synthesize a gelatin-based bioink that is composed of a hydrazone crosslinked dynamic hydrogel network and a methacrylate crosslinked non-dynamic hydrogel network. We demonstrate that our optimized DNDH formulation can be 3D printed into customized structures while retaining structural stability for weeks. Moreover, the DNDH exhibits matrix dynamics with a much shorter stress relaxation time than the non-dynamic counterpart, which is demonstrated to trigger vascular morphogenesis through cell-matrix interactions in a stiffness-independent way. The inclusion of biochemical cues in the matrix and co-culture with supporting cells further enhances the formation of vascular networks and confirms the advantages of DNDH over its non-dynamic counterpart. The <em>in vivo</em> studies further confirm the importance of matrix dynamics in vascularization promotion. Our work provides a generalizable and easy-to-use approach to introduce matrix dynamics to bioinks, which could expand the capability of dynamic hydrogels in biofabrication scenarios.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"84 ","pages":"Pages 10-27"},"PeriodicalIF":21.1,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-resolution 3D printed strain sensor with superb stretchability and sensitivity: Unveiling the potential of melt electrowriting 高分辨率3D打印应变传感器，具有卓越的拉伸性和灵敏度：揭示熔体电解的潜力

IF 21.1 1区材料科学

Materials Today Pub Date : 2025-02-07 DOI: 10.1016/j.mattod.2025.01.017

Longping Nie , Yue Sun , Xin Ming , Zhen Xu , Xiangyu Ye , Tao Liu , Xinbo Ding , Lei Du , Jiangtao Xu , Huaizhong Xu

{"title":"High-resolution 3D printed strain sensor with superb stretchability and sensitivity: Unveiling the potential of melt electrowriting","authors":"Longping Nie , Yue Sun , Xin Ming , Zhen Xu , Xiangyu Ye , Tao Liu , Xinbo Ding , Lei Du , Jiangtao Xu , Huaizhong Xu","doi":"10.1016/j.mattod.2025.01.017","DOIUrl":"10.1016/j.mattod.2025.01.017","url":null,"abstract":"<div><div>Recently, flexible strain sensors have attracted considerable attention due to their outstanding adaptability in applications such as human motion detection, health monitoring, and human–machine interaction. However, achieving strain sensors that integrate both high sensitivity and extensive stretchability remains a notable challenge. Herein, we employed melt electrowriting (MEW), a cutting-edge additive manufacturing technology, to fabricate a thermoplastic polyurethane (TPU) lattice with high-resolution and precisely designed structures. Subsequently, reduced graphene oxide (rGO) was deposited <em>via</em> layer-by-layer self-assembly to impart conductivity and leverage the substrate’s microstructure. Through optimizing structure and parameters, a flexible strain sensor with a high gauge factor (GF = 3,807.8) and a broad working range (up to 140%) has been achieved, representing an exceptional balance of sensitivity and stretchability. The sensor also shows remarkable durability with stable performance and negligible resistance variation after 5,000 cycles of stretching and releasing at 50% strain. Furthermore, the sensor can accurately detect diverse motions, from subtle swallowing actions to large-scale finger and knee bending, underscoring its significant potential for wearable electronics, and highlighting the transformative role of MEW in advancing this technology.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"84 ","pages":"Pages 39-47"},"PeriodicalIF":21.1,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Radiation-synthesis of covalent bonding heterojunctions for selective solar-driven CO2 reduction 辐射合成共价键异质结用于选择性太阳能驱动的CO2还原

IF 21.1 1区材料科学

Materials Today Pub Date : 2025-02-05 DOI: 10.1016/j.mattod.2025.01.016

Weidong Hou , Huazhang Guo , Kang Wang , Tao Han , Jiye Zhang , Minghong Wu , Liang Wang

{"title":"Radiation-synthesis of covalent bonding heterojunctions for selective solar-driven CO2 reduction","authors":"Weidong Hou , Huazhang Guo , Kang Wang , Tao Han , Jiye Zhang , Minghong Wu , Liang Wang","doi":"10.1016/j.mattod.2025.01.016","DOIUrl":"10.1016/j.mattod.2025.01.016","url":null,"abstract":"<div><div>The low carrier concentration and sluggish internal charge migration impede the efficiency of CO<sub>2</sub> photoreduction in conventional catalysts. Herein, we present an efficient electron beam irradiation strategy to synthesize a carbon nitride/carbon quantum dots (ECN/CQD) heterojunction photocatalyst with an N-bridged covalent interface. This covalent bond at the ECN/CQD interface significantly accelerates the separation and migration of photogenerated charge carriers, resulting in a high concentration of surface charges. As a result, ECN/CQD demonstrates outstanding photocatalytic performance, with CO and CH<sub>4</sub> evolution rates of 44.5 and 0.88 μmol g<sup>−1</sup> h<sup>−1</sup>, respectively, and excellent stability across eight consecutive cycles. Additionally, in situ Kelvin probe force microscopy and electrostatic force microscopy characterizations reveal the charge distribution on the catalyst surface, providing deep insights into the enhanced charge separation capabilities of the covalent bond heterojunction. This work provides an innovative approach for developing high-performance covalent bond heterojunction photocatalysts for efficient CO<sub>2</sub> reduction.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"84 ","pages":"Pages 1-9"},"PeriodicalIF":21.1,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lewis acid molten salt synthesis of 2D MXenes with fine-tuned surface terminations for energy storage and conversion Lewis酸熔盐合成具有微调表面末端的二维MXenes用于能量储存和转换

IF 21.1 1区材料科学

Materials Today Pub Date : 2025-01-01 DOI: 10.1016/j.mattod.2024.12.004

Tasmia Azam , Muhammad Shoaib Khalid , Zhong-Shuai Wu

{"title":"Lewis acid molten salt synthesis of 2D MXenes with fine-tuned surface terminations for energy storage and conversion","authors":"Tasmia Azam , Muhammad Shoaib Khalid , Zhong-Shuai Wu","doi":"10.1016/j.mattod.2024.12.004","DOIUrl":"10.1016/j.mattod.2024.12.004","url":null,"abstract":"<div><div>Two-dimensional (2D) MXenes have gained substantial interest in energy storage and conversion technologies by virtue of their remarkable electrochemical properties. Traditional MXene synthesis methods involving hazardous acidic etchants pose safety concerns, scalability limitations, and yield MXenes with heterogeneous surface terminations which affect their suitability in specific energy applications. The emergence of Lewis acid molten salt (LAMS) method has revolutionized MXene synthesis by offering a safer, environmentally friendly, and more versatile approach that enables precise control over surface terminations. This review comprehensively summarizes the chemical synthesis of 2D MXenes and their hybrids using the LAMS method and modified approaches, along with recent developments of these rapidly evolving techniques within energy storage and conversion systems. Additionally, the advantages of the LAMS method beyond safety considerations in terms of fine-tuning surface chemistry, in-situ synthesis of metal/MXene hybrids, and expansion of the synthesis landscape are presented. Moreover, the strategies for delamination of LAMS-synthesized MXenes to obtain single/few-layer MXenes are also discussed. Finally, the review highlights the encountered challenges and proposes future perspectives.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"82 ","pages":"Pages 289-320"},"PeriodicalIF":21.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal-triggered mitochondrial oxidative phosphorylation-enhanced nanodrug sensitizes cuproptosis with amplified anti-tumor immunity 热触发的线粒体氧化磷酸化增强纳米药物使铜protosis增敏，增强抗肿瘤免疫

IF 21.1 1区材料科学

Materials Today Pub Date : 2025-01-01 DOI: 10.1016/j.mattod.2024.11.001

Huimin Lin , Peipei Zhang , Jie Yu , Hongpei Deng , Shengfang Ge , Hongjing Dou , Jing Ruan , Xianqun Fan

{"title":"Thermal-triggered mitochondrial oxidative phosphorylation-enhanced nanodrug sensitizes cuproptosis with amplified anti-tumor immunity","authors":"Huimin Lin , Peipei Zhang , Jie Yu , Hongpei Deng , Shengfang Ge , Hongjing Dou , Jing Ruan , Xianqun Fan","doi":"10.1016/j.mattod.2024.11.001","DOIUrl":"10.1016/j.mattod.2024.11.001","url":null,"abstract":"<div><div>Cuproptosis, a form of programmed cell death (PCD) dependent on mitochondrial respiration and driven by ferredoxin 1 (FDX1), has shown limited antitumor efficacy due to the Warburg effect. In order to break through this limitation, we first discover that cuproptosis is highly correlated with thermal stimulation because thermal stimulus is beneficial for improving tumor mitochondrial oxidative phosphorylation. On this basis, a thermal-responsive mitochondrial metabolism-regulable nanodrug (DIE) is developed by encapsulating two FDA-approved drugs, indocyanine green (ICG) and elesclomol (ES), into a dextran-based copolymeric nanocarrier. DIE is rich in disulfide bonds which are advantageous for depleting GSH and ensuring the cytotoxic Cu (I) concentrations required for cuproptosis. Upon near-infrared laser stimulation, DIE significantly sensitizes melanoma cells to cuproptosis through increasing mitochondrial reductase FDX1-mediated lipoylated protein aggregation and oxidative phosphorylation. Moreover, the enhanced cuproptosis further induces immunogenetic cell death and subsequently improves the efficacy of the PD-L1 immune checkpoint inhibitors, demonstrating excellent tumor suppression and metastasis inhibition. This study offers a novel approach to sensitize cancer cells to cuproptosis and provides a synergistic strategy for tumor immunotherapy.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"82 ","pages":"Pages 12-31"},"PeriodicalIF":21.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Harvesting room-temperature plasticity in ceramics by mechanically seeded dislocations 通过机械播种位错获取陶瓷的室温塑性

IF 21.1 1区材料科学

Materials Today Pub Date : 2025-01-01 DOI: 10.1016/j.mattod.2024.11.014

Xufei Fang , Wenjun Lu , Jiawen Zhang , Christian Minnert , Junhua Hou , Sebastian Bruns , Ulrike Kunz , Atsutomo Nakamura , Karsten Durst , Jürgen Rödel

{"title":"Harvesting room-temperature plasticity in ceramics by mechanically seeded dislocations","authors":"Xufei Fang , Wenjun Lu , Jiawen Zhang , Christian Minnert , Junhua Hou , Sebastian Bruns , Ulrike Kunz , Atsutomo Nakamura , Karsten Durst , Jürgen Rödel","doi":"10.1016/j.mattod.2024.11.014","DOIUrl":"10.1016/j.mattod.2024.11.014","url":null,"abstract":"<div><div>The quest for room-temperature ductile ceramics has been repeatedly fueled by hopes for large-scale applications but so far has been not successful. Recent demonstrations of enhanced functional properties in ceramics through judicious dislocation imprint, however, have been sparking renewed interest in dislocation plasticity in brittle ceramics. Here, we propose a facile approach using room-temperature mechanically seeded dislocations with a density of ∼ 10<sup>14</sup>/m<sup>2</sup> to significantly improve the room-temperature plasticity of ceramics with a large plastic compressive strain beyond ∼ 30 %. The seeded mobile dislocations trigger profuse dislocation multiplication via cross slip and motion. Hence, they offer an avenue to suppress brittle fracture and harvest plasticity in ceramics without any additional high-temperature process. We employ both <em>in situ</em> nano-/micromechanical deformation and <em>ex situ</em> bulk deformation to bridge the length scales. This finding tackles the pressing bottleneck of dislocation engineering in ceramics for achieving ductile ceramics and harvesting versatile mechanical and functional properties.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"82 ","pages":"Pages 81-91"},"PeriodicalIF":21.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Role of clustering in the anomalous properties of supercritical fluids 聚类在超临界流体异常性质中的作用

IF 21.1 1区材料科学

Materials Today Pub Date : 2025-01-01 DOI: 10.1016/j.mattod.2024.11.008

N.M. Asharchuk, V.I. Yusupov, E.I. Mareev

{"title":"Role of clustering in the anomalous properties of supercritical fluids","authors":"N.M. Asharchuk, V.I. Yusupov, E.I. Mareev","doi":"10.1016/j.mattod.2024.11.008","DOIUrl":"10.1016/j.mattod.2024.11.008","url":null,"abstract":"<div><div>We propose that the anomalous (non-monotonic) behavior of physical properties of supercritical fluids (SCF) in the Widom delta is attributed to the formation of medium-sized clusters. This hypothesis is experimentally verified for carbon dioxide using both experimental methods and molecular dynamics simulations. From a microscopic point of view, the non-monotonic behavior of the nonlinear refractive index, speed of sound, and Raman scattering efficiency is caused by the formation of quasi-linear clusters of medium size (5–200 molecules per cluster). Within the clusters, the molecule concentration is close to that of the liquid phase, while outside the clusters, it resembles the gas phase, leading to experimentally observed high (∼15 %) density fluctuations. Isolated linear clusters exhibit high second-order hyperpolarizability, resulting in an increase in the molecular contribution to the nonlinear refractive index and the intensity of Raman scattering. The appearance of multiple Widom lines on the pressure–temperature (p-T) diagram, each associated with unique physical properties, arises from the combined effects of cluster-specific and density-related factors. This interplay results in the divergence of Widom lines and the formation of the characteristic feature known as the Widom delta.</div></div>","PeriodicalId":387,"journal":{"name":"Materials Today","volume":"82 ","pages":"Pages 49-56"},"PeriodicalIF":21.1,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0