Pub Date : 2024-07-18DOI: 10.1016/j.apmt.2024.102327
H. Yazdani Sarvestani, T. Lacelle, A. Sohrabi-Kashani, A. Shashoua, V. Karamzadeh, H. Ravanbakhsh, A. Robitaille, H. Lavoie, C. Paquet, M.B. Jakubinek, B. Ashrafi
Ceramic materials possess high mechanical strength and environmental stability, but their brittleness limits their suitability for structural applications. A solution lies in using polymer-derived ceramics (PDCs), which offer enhanced toughness and versatility in shaping unlike traditional ceramic processing methods. This study explores tunable ceramic cellular architectures based on triply periodic minimal surface (TPMS) designs, fabricated via stereolithography (SLA) using a silicon oxycarbide precursor formulated for vat photopolymerization. By combining the preceramic polymer with a photoinitiator, crosslinkers, and other additives, intricate shapes are 3D-printed and then pyrolyzed under nitrogen, resulting in PDCs with complex TPMS geometries. The toughness, strength, and stiffness of the 3D-printed structures are evaluated through quasi-static compression experiments. Comprehensive material and microstructural characterizations of the PDCs are performed pre- and post-pyrolysis, employing visual inspection, X-ray micro-tomography, thermogravimetric analysis, energy dispersive X-ray spectroscopy, density, and rheological measurements. Optimization of 3D printing and pyrolysis parameters yields ceramic structures with 2.2 MPa compressive strength and 330 MPa stiffness with a lattice density of 0.5 g cm. The ceramic material, including porosity, had a maximum density of 1.63 ± 0.01 g cm. This low-cost SLA 3D printing technique is ideal for creating thin features and customized structures of bio-inspired, architectured ceramics. Furthermore, the process exhibits excellent printability, being compatible with common and cost-effective SLA, DLP, and LCD 3D printers.
陶瓷材料具有较高的机械强度和环境稳定性，但其脆性限制了其在结构应用中的适用性。与传统的陶瓷加工方法不同，聚合物衍生陶瓷（PDCs）具有更高的韧性和成型多样性，是一种解决方案。本研究探讨了基于三重周期性最小表面 (TPMS) 设计的可调陶瓷蜂窝结构，该结构是使用为槽式光聚合配制的碳化硅前驱体，通过立体光刻 (SLA) 制作而成。通过将预陶瓷聚合物与光引发剂、交联剂和其他添加剂相结合，复杂的形状被三维打印出来，然后在氮气环境下进行热解，最终得到具有复杂 TPMS 几何形状的 PDC。通过准静态压缩实验对 3D 打印结构的韧性、强度和刚度进行了评估。热解前后对 PDC 进行了全面的材料和微结构表征，采用了目视检查、X 射线显微层析成像、热重分析、能量色散 X 射线光谱、密度和流变测量等方法。通过优化三维打印和热解参数，陶瓷结构的抗压强度达到 2.2 兆帕，刚度达到 330 兆帕，晶格密度为 0.5 克厘米。陶瓷材料（包括孔隙率）的最大密度为 1.63 ± 0.01 克厘米。这种低成本的 SLA 3D 打印技术非常适合用于创建薄型特征和生物启发架构陶瓷的定制结构。此外，该工艺还具有出色的打印性能，可与常见的高性价比 SLA、DLP 和 LCD 3D 打印机兼容。
{"title":"3D-printed polymer-derived ceramics with tunable cellular architectures","authors":"H. Yazdani Sarvestani, T. Lacelle, A. Sohrabi-Kashani, A. Shashoua, V. Karamzadeh, H. Ravanbakhsh, A. Robitaille, H. Lavoie, C. Paquet, M.B. Jakubinek, B. Ashrafi","doi":"10.1016/j.apmt.2024.102327","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102327","url":null,"abstract":"Ceramic materials possess high mechanical strength and environmental stability, but their brittleness limits their suitability for structural applications. A solution lies in using polymer-derived ceramics (PDCs), which offer enhanced toughness and versatility in shaping unlike traditional ceramic processing methods. This study explores tunable ceramic cellular architectures based on triply periodic minimal surface (TPMS) designs, fabricated via stereolithography (SLA) using a silicon oxycarbide precursor formulated for vat photopolymerization. By combining the preceramic polymer with a photoinitiator, crosslinkers, and other additives, intricate shapes are 3D-printed and then pyrolyzed under nitrogen, resulting in PDCs with complex TPMS geometries. The toughness, strength, and stiffness of the 3D-printed structures are evaluated through quasi-static compression experiments. Comprehensive material and microstructural characterizations of the PDCs are performed pre- and post-pyrolysis, employing visual inspection, X-ray micro-tomography, thermogravimetric analysis, energy dispersive X-ray spectroscopy, density, and rheological measurements. Optimization of 3D printing and pyrolysis parameters yields ceramic structures with 2.2 MPa compressive strength and 330 MPa stiffness with a lattice density of 0.5 g cm. The ceramic material, including porosity, had a maximum density of 1.63 ± 0.01 g cm. This low-cost SLA 3D printing technique is ideal for creating thin features and customized structures of bio-inspired, architectured ceramics. Furthermore, the process exhibits excellent printability, being compatible with common and cost-effective SLA, DLP, and LCD 3D printers.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"12 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-18DOI: 10.1016/j.apmt.2024.102339
Lu Guo, Yibo Liang, Junchi Ma, Haoyang Song, Yang Cai, Chenglong Li, Yan Shang, Cai Long, Changsheng Liu, Yongquan Qing
Flexible wearable strain sensors possess extensive applicability in wearables, electronic skin, and environmental monitoring. However, these sensors face challenges in maintaining stable sensing performance when exposed to harsh environments, as mechanical damage and liquid corrosion can lead to localized degradation, micro-cracks, and even macroscopic cracks. Herein, we present an integrated wearable collaborative strain sensor (IWCSS), achieved by applying the superhydrophobic layer on conductive double-cross-linked hydrogel surface. This IWCSS, once severed, can simultaneously restore its sensing performance and superhydrophobicity after 16 h at 25 ℃, attributing to the synergistic effect of reversible bonds—amide, borate ester and metal coordination bond—that drive molecular self-healing. Additionally, with a sensing coefficient of 0.8 and a response time of 70 ms, the IWCSS's superhydrophobic layer serves as a shield against aqueous infiltration and corrosive liquids, ensuring stable sensing and accurate monitoring of human movements in harsh environments. Our design strategy paves the way for developing wearable sensor materials with enhanced reliability in demanding operating environments.
{"title":"Integrated wearable collaborative strain sensor with simultaneous self-healing and superhydrophobic abilities for stable sensing monitoring","authors":"Lu Guo, Yibo Liang, Junchi Ma, Haoyang Song, Yang Cai, Chenglong Li, Yan Shang, Cai Long, Changsheng Liu, Yongquan Qing","doi":"10.1016/j.apmt.2024.102339","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102339","url":null,"abstract":"Flexible wearable strain sensors possess extensive applicability in wearables, electronic skin, and environmental monitoring. However, these sensors face challenges in maintaining stable sensing performance when exposed to harsh environments, as mechanical damage and liquid corrosion can lead to localized degradation, micro-cracks, and even macroscopic cracks. Herein, we present an integrated wearable collaborative strain sensor (IWCSS), achieved by applying the superhydrophobic layer on conductive double-cross-linked hydrogel surface. This IWCSS, once severed, can simultaneously restore its sensing performance and superhydrophobicity after 16 h at 25 ℃, attributing to the synergistic effect of reversible bonds—amide, borate ester and metal coordination bond—that drive molecular self-healing. Additionally, with a sensing coefficient of 0.8 and a response time of 70 ms, the IWCSS's superhydrophobic layer serves as a shield against aqueous infiltration and corrosive liquids, ensuring stable sensing and accurate monitoring of human movements in harsh environments. Our design strategy paves the way for developing wearable sensor materials with enhanced reliability in demanding operating environments.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"53 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-16DOI: 10.1016/j.apmt.2024.102323
Yuriy Snyder, Fred Anthony Mann, John Middleton, Takashi Murashita, John Carney, Richard W. Bianco, Soumen Jana
The clinical application of heart valve scaffolds is hindered by complications associated with the activation of valvular interstitial cell-like (VIC-like) cells and their transdifferentiation into myofibroblasts. This study aimed to examine several molecular pathway(s) that may trigger the overactive myofibroblast phenotypes in the implanted scaffolds. So, we investigated the influence of three molecular pathways - macrophage-induced inflammation, the TGF-β1-SMAD2, and WNT/β-catenin – on VIC-like cells during tissue engineering of heart valve scaffolds. We implanted electrospun heart valve scaffolds in adult sheep for up to 6 months in the right ventricular outflow tract (RVOT) and analyzed biomolecular (gene and protein) expression associated with the above three pathways by the scaffold infiltrating cells. The results showed a gradual increase in gene and protein expression of markers related to the activation of VIC-like cells and the myofibroblast phenotypes over 6 months of scaffold implantation. Conversely, there was a gradual increase in macrophage activity for the first three months after scaffold implantation. However, a decrease in macrophage activity from three to six months of scaffold tissue engineering suggested that immunological signal factors were not the primary cause of myofibroblast phenotype. Similarly, the gene and protein expression of factors associated with the TGF-β1-SMAD2 pathway in the cells increased in the first three months but declined in the next three months. Contrastingly, the gene and protein expression of factors associated with the WNT/β-catenin pathway increased significantly over the six-month study. Thus, the WNT/β-catenin pathway could be the predominant mechanism in activating VIC-like cells and subsequent myofibroblast phenotype.
{"title":"Non-immune factors cause prolonged myofibroblast phenotype in implanted synthetic heart valve scaffolds","authors":"Yuriy Snyder, Fred Anthony Mann, John Middleton, Takashi Murashita, John Carney, Richard W. Bianco, Soumen Jana","doi":"10.1016/j.apmt.2024.102323","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102323","url":null,"abstract":"The clinical application of heart valve scaffolds is hindered by complications associated with the activation of valvular interstitial cell-like (VIC-like) cells and their transdifferentiation into myofibroblasts. This study aimed to examine several molecular pathway(s) that may trigger the overactive myofibroblast phenotypes in the implanted scaffolds. So, we investigated the influence of three molecular pathways - macrophage-induced inflammation, the TGF-β1-SMAD2, and WNT/β-catenin – on VIC-like cells during tissue engineering of heart valve scaffolds. We implanted electrospun heart valve scaffolds in adult sheep for up to 6 months in the right ventricular outflow tract (RVOT) and analyzed biomolecular (gene and protein) expression associated with the above three pathways by the scaffold infiltrating cells. The results showed a gradual increase in gene and protein expression of markers related to the activation of VIC-like cells and the myofibroblast phenotypes over 6 months of scaffold implantation. Conversely, there was a gradual increase in macrophage activity for the first three months after scaffold implantation. However, a decrease in macrophage activity from three to six months of scaffold tissue engineering suggested that immunological signal factors were not the primary cause of myofibroblast phenotype. Similarly, the gene and protein expression of factors associated with the TGF-β1-SMAD2 pathway in the cells increased in the first three months but declined in the next three months. Contrastingly, the gene and protein expression of factors associated with the WNT/β-catenin pathway increased significantly over the six-month study. Thus, the WNT/β-catenin pathway could be the predominant mechanism in activating VIC-like cells and subsequent myofibroblast phenotype.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"33 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-16DOI: 10.1016/j.apmt.2024.102316
Koustav Pal, I. Das
Recent research has highlighted the prominence of double perovskites for their diverse properties by incorporating elements across the periodic table. Among them, the hexagonal double perovskite is a subject of growing interest for its potential quantum properties. Our study focuses on the 6H hexagonal double perovskite BaCo[CoRu]O, revealing mixed valence states of Co and Ru ions and notable charge transfer phenomena. By analyzing metal ion Wyckoff positions and considering structural and magnetic properties, we uncover insights into exchange bias mechanisms. Our study underscores the significance of hexagonal perovskite structures in yielding giant exchange bias with appropriate ionic compositions, highlighting the role of rational material design.
最近的研究突显了双包晶石的显著特点，即通过掺入元素周期表中的各种元素，使其具有多种特性。其中，六方双包晶石因其潜在的量子特性而日益受到关注。我们的研究侧重于 6H 六方双包晶石 BaCo[CoRu]O，揭示了 Co 离子和 Ru 离子的混合价态以及显著的电荷转移现象。通过分析金属离子的怀科夫位置以及考虑结构和磁性能，我们揭示了交换偏置机制。我们的研究强调了六方包晶结构在适当离子组成下产生巨大交换偏压的重要性，突出了合理材料设计的作用。
{"title":"Exploring the origin of exchange bias and spin glass behavior in 6H hexagonal perovskite structure: Structural and magnetic analysis","authors":"Koustav Pal, I. Das","doi":"10.1016/j.apmt.2024.102316","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102316","url":null,"abstract":"Recent research has highlighted the prominence of double perovskites for their diverse properties by incorporating elements across the periodic table. Among them, the hexagonal double perovskite is a subject of growing interest for its potential quantum properties. Our study focuses on the 6H hexagonal double perovskite BaCo[CoRu]O, revealing mixed valence states of Co and Ru ions and notable charge transfer phenomena. By analyzing metal ion Wyckoff positions and considering structural and magnetic properties, we uncover insights into exchange bias mechanisms. Our study underscores the significance of hexagonal perovskite structures in yielding giant exchange bias with appropriate ionic compositions, highlighting the role of rational material design.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"58 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-16DOI: 10.1016/j.apmt.2024.102320
Pritam Sharma, Sobhan Erfantalab, John Dell, Giacinta Parish, Adrian Keating
This work reports a novel CMOS-compatible micromachining process to fabricate large porous silicon membranes which are electrically isolated from the silicon substrate. The process developed successfully addresses the challenges of photoresist seepage into pores and the instability of the films in alkaline developers. These fabricated membranes can be potentially used as a temperature sensing membrane in uncooled thermal detectors operating in long wavelength infrared region (LWIR).
{"title":"Micromachining porous silicon thin films for thermal sensing applications","authors":"Pritam Sharma, Sobhan Erfantalab, John Dell, Giacinta Parish, Adrian Keating","doi":"10.1016/j.apmt.2024.102320","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102320","url":null,"abstract":"This work reports a novel CMOS-compatible micromachining process to fabricate large porous silicon membranes which are electrically isolated from the silicon substrate. The process developed successfully addresses the challenges of photoresist seepage into pores and the instability of the films in alkaline developers. These fabricated membranes can be potentially used as a temperature sensing membrane in uncooled thermal detectors operating in long wavelength infrared region (LWIR).","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"48 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-16DOI: 10.1016/j.apmt.2024.102330
Xiao Gong, Mengyi Wu, Jiurong Li, Shiwei Zhang, Min Wu
Carbon nanodots (CDs) have seen unprecedented growth in recent years. Here, we report a facile synthesis strategy of tunable luminescent CDs via sulfur (S)-nitrogen (N) co-doping for visually detecting sodium nitrite (NaNO). The prepared multicolor CDs have outstanding stability and good emission properties, and the emitted fluorescence of the CDs can be redshifted from 520 nm to 555 nm to 625 nm by introducing S and N elemental doping, reaching a redshift of wavelength greater than 100 nm. The narrowing of the energy gap caused by the increase in graphitic N and C = O levels might be the reason behind the adjustable luminescence mechanism of the CDs. This also suggests an increase in sp conjugated domains, which shifts the emission wavelength towards the red color. Besides, yellow CDs (Y-CDs) and red CDs (R-CDs) synthesized by S and N co-doping are extremely sensitive and specific in detecting NaNO. Importantly, the detection of NaNO can be visualized by the color recognition software in the smart phone. We expect that this synthesis strategy will provide favorable technical support for the synthesis of emission redshift of high-performance CDs with special applications.
近年来，碳纳米点（CD）得到了前所未有的发展。在此，我们报告了一种通过硫（S）-氮（N）共掺杂的可调发光 CD 的简便合成策略，用于视觉检测亚硝酸钠（NaNO）。所制备的多色光盘具有出色的稳定性和良好的发射性能，通过引入S和N元素掺杂，光盘的发射荧光可以从520 nm红移到555 nm再到625 nm，红移波长大于100 nm。石墨化 N 和 C = O 水平的增加导致能隙变窄，这可能是光盘发光机制可调的原因。这也表明 sp 共轭畴的增加会使发射波长向红色偏移。此外，通过 S 和 N 共掺合成的黄色光盘（Y-CDs）和红色光盘（R-CDs）在检测 NaNO 方面具有极高的灵敏度和特异性。重要的是，NaNO 的检测结果可以通过智能手机中的颜色识别软件直观地显示出来。我们期待这一合成策略能为合成具有特殊应用的发射红移高性能光盘提供有利的技术支持。
{"title":"A rational synthesis strategy of multicolor carbon nanodots for efficient visual detection of NaNO2","authors":"Xiao Gong, Mengyi Wu, Jiurong Li, Shiwei Zhang, Min Wu","doi":"10.1016/j.apmt.2024.102330","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102330","url":null,"abstract":"Carbon nanodots (CDs) have seen unprecedented growth in recent years. Here, we report a facile synthesis strategy of tunable luminescent CDs via sulfur (S)-nitrogen (N) co-doping for visually detecting sodium nitrite (NaNO). The prepared multicolor CDs have outstanding stability and good emission properties, and the emitted fluorescence of the CDs can be redshifted from 520 nm to 555 nm to 625 nm by introducing S and N elemental doping, reaching a redshift of wavelength greater than 100 nm. The narrowing of the energy gap caused by the increase in graphitic N and C = O levels might be the reason behind the adjustable luminescence mechanism of the CDs. This also suggests an increase in sp conjugated domains, which shifts the emission wavelength towards the red color. Besides, yellow CDs (Y-CDs) and red CDs (R-CDs) synthesized by S and N co-doping are extremely sensitive and specific in detecting NaNO. Importantly, the detection of NaNO can be visualized by the color recognition software in the smart phone. We expect that this synthesis strategy will provide favorable technical support for the synthesis of emission redshift of high-performance CDs with special applications.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"19 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The energy storage performances for tungsten bronze ferroelectric ceramics have always been constrained by the weak relaxor behavior and low breakdown strength. To enhance the energy storage capacity of the tungsten bronze ferroelectric ceramics, a synergistic two-step optimization strategy is proposed based on the SrBaNbO ceramic in this work, that is, enhance the relaxor behavior to generate slim hysteresis loops through the introduction of BiKTiO, and then optimize the microstructure to improve the breakdown strength by adding the sintering aid CuO. Ultimately, a remarkable comprehensive performance is achieved, characterized by a recoverable energy storage density of approximately 6.31 J/cm³ and an efficiency of about 91.8 % under 600 kV/cm. Notably, a high power density (∼178 MW/cm³) and an ultrafast discharge speed (<65 ns) are simultaneously attained, indicating excellent capacitive performance. Moreover, it is revealed that the enhanced relaxor behavior is closely related to the incommensurate modulation structure in the ceramic, while the improved breakdown strength should be ascribed to the reinforced grain boundary, which collectively contribute to the superior energy storage performances.
{"title":"Excellent energy storage capability in Sr0.6Ba0.4Nb2O6-based ceramics via incommensurate modulation and grain boundary reinforcement","authors":"Peng Zheng, Xiangting Zheng, Jiaqi Wang, Linsheng Sheng, Liang Zheng, Qiaolan Fan, Wangfeng Bai, Yang Zhang","doi":"10.1016/j.apmt.2024.102326","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102326","url":null,"abstract":"The energy storage performances for tungsten bronze ferroelectric ceramics have always been constrained by the weak relaxor behavior and low breakdown strength. To enhance the energy storage capacity of the tungsten bronze ferroelectric ceramics, a synergistic two-step optimization strategy is proposed based on the SrBaNbO ceramic in this work, that is, enhance the relaxor behavior to generate slim hysteresis loops through the introduction of BiKTiO, and then optimize the microstructure to improve the breakdown strength by adding the sintering aid CuO. Ultimately, a remarkable comprehensive performance is achieved, characterized by a recoverable energy storage density of approximately 6.31 J/cm³ and an efficiency of about 91.8 % under 600 kV/cm. Notably, a high power density (∼178 MW/cm³) and an ultrafast discharge speed (<65 ns) are simultaneously attained, indicating excellent capacitive performance. Moreover, it is revealed that the enhanced relaxor behavior is closely related to the incommensurate modulation structure in the ceramic, while the improved breakdown strength should be ascribed to the reinforced grain boundary, which collectively contribute to the superior energy storage performances.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"69 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-13DOI: 10.1016/j.apmt.2024.102321
Aliesha D. Johnson, Mohammad M. Rastegardoost, Nima Barri, Tobin Filleter, Zia Saadatnia, Hani E. Naguib
Innovating novel, green, biodegradable, and recyclable polymers are critical for the development of environmentally sustainable solutions, eliminating concerns of pollution and microplastic accumulation. Herin, this study presents remarkably enhanced tribo-positive polyethylene oxide (PEO) polarity, by incorporating for the first time, a clay inorganic filler, creating a novel biodegradable composite triboelectric material. The low-cost composite comprised a biodegradable polymeric PEO matrix, an abundant naturally sourced muscovite mica micro-platelet filler, and integrated simple material fabrication methods. A 4 cm PEO/Mica film was paired with polytetrafluoroethylene (PTFE), generating a peak-to-peak voltage, current density, and transferred charge density of respectfully, 296 V, 24.2 mA and 110.3 µC . Reducing the film thickness to 40 µm dramatically enhanced the electrical output, resulting in a peak-to-peak voltage and instantaneous power density of respectfully, 424 V and 12.1 W . The addition of mica greatly improved the dielectric permittivity, promoting the outstanding triboelectric performance. The composite material's long-term stability and flexibility demonstrated significant advantages for self-powering small electronic systems. Furthermore, PEOs facile water solubility allowed mica separation, recovery, recyclability, and integration within new PEO/Mica films, resulted in preserved triboelectric outputs. The PEO/Mica composite delivers exceptional sustainable, recyclable, and tribo-positive attributes, serving as an excellent energy harvesting solution.
{"title":"High performance flexible green triboelectric nanogenerator with polyethylene oxide/mica tribo-positive composite material","authors":"Aliesha D. Johnson, Mohammad M. Rastegardoost, Nima Barri, Tobin Filleter, Zia Saadatnia, Hani E. Naguib","doi":"10.1016/j.apmt.2024.102321","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102321","url":null,"abstract":"Innovating novel, green, biodegradable, and recyclable polymers are critical for the development of environmentally sustainable solutions, eliminating concerns of pollution and microplastic accumulation. Herin, this study presents remarkably enhanced tribo-positive polyethylene oxide (PEO) polarity, by incorporating for the first time, a clay inorganic filler, creating a novel biodegradable composite triboelectric material. The low-cost composite comprised a biodegradable polymeric PEO matrix, an abundant naturally sourced muscovite mica micro-platelet filler, and integrated simple material fabrication methods. A 4 cm PEO/Mica film was paired with polytetrafluoroethylene (PTFE), generating a peak-to-peak voltage, current density, and transferred charge density of respectfully, 296 V, 24.2 mA and 110.3 µC . Reducing the film thickness to 40 µm dramatically enhanced the electrical output, resulting in a peak-to-peak voltage and instantaneous power density of respectfully, 424 V and 12.1 W . The addition of mica greatly improved the dielectric permittivity, promoting the outstanding triboelectric performance. The composite material's long-term stability and flexibility demonstrated significant advantages for self-powering small electronic systems. Furthermore, PEOs facile water solubility allowed mica separation, recovery, recyclability, and integration within new PEO/Mica films, resulted in preserved triboelectric outputs. The PEO/Mica composite delivers exceptional sustainable, recyclable, and tribo-positive attributes, serving as an excellent energy harvesting solution.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"16 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-13DOI: 10.1016/j.apmt.2024.102318
Soojeong Choi, Eun Je Jeon, Yunsu Bae, Jihoon Jeon, Donyoung Kang, Hyungsuk Lee, Seung-Woo Cho
Osteoarthritis (OA) is a common chronic degenerative joint disease characterized by gradual deterioration and pain. Viscosupplementation, involving hyaluronic acid (HA) injection into the affected joint, is a minimally invasive option to reduce pain by improving joint lubrication and potentially avoiding the need for replacement surgery. However, the low adhesion and rapid degradation of HA often lead to inadequate therapeutic effects. In this study, we present lubricating adhesive HA-based hydrogel patches designed to effectively treat OA. The HA patches, modified with pyrogallol, have high elastic and compressive moduli, delaying degradation when exposed to external stimuli. Furthermore, they securely adhere to cartilage tissue surfaces and efficiently lubricate damaged cartilage, leading to a reduced friction and wear. In addition to these benefits, our HA patches exhibit scavenging effect of reactive oxygen species and sustainably release an encapsulated anti-inflammatory drug (dexamethasone: Dex). These features further enhance their therapeutic potential for OA treatment. In a mouse OA model, the hydrogel patches loaded with Dex promote healing of damaged cartilage and restore its motor function. Overall, our bioinspired HA hydrogel patches present a promising treatment option for managing the debilitating joint disease by offering enhanced adhesion, lubrication for cartilage protection, antioxidant effect, and sustained drug release.
骨关节炎（OA）是一种常见的慢性退行性关节疾病，以逐渐恶化和疼痛为特征。向受影响的关节注射透明质酸（HA）是一种微创疗法，可通过改善关节润滑来减轻疼痛，并有可能避免进行关节置换手术。然而，透明质酸的低粘附性和快速降解往往导致治疗效果不佳。在这项研究中，我们提出了基于 HA 的润滑粘合剂水凝胶贴片，旨在有效治疗 OA。这种经焦谷醇改性的医管局贴片具有很高的弹性和压缩模量，在受到外部刺激时可延缓降解。此外，它们还能牢牢粘附在软骨组织表面，有效润滑受损软骨，从而减少摩擦和磨损。除了这些优点外，我们的 HA 贴片还具有清除活性氧的作用，并能持续释放封装的抗炎药物（地塞米松：Dex）。这些特点进一步提高了它们治疗 OA 的潜力。在小鼠 OA 模型中，装载了 Dex 的水凝胶贴片促进了受损软骨的愈合并恢复了运动功能。总之，我们的生物启发 HA 水凝胶贴片具有更强的粘附性、保护软骨的润滑性、抗氧化作用和持续的药物释放性，是治疗衰弱性关节疾病的理想选择。
{"title":"Lubricating adhesive hyaluronate patch promotes cartilage regeneration and functional restoration in osteoarthritis","authors":"Soojeong Choi, Eun Je Jeon, Yunsu Bae, Jihoon Jeon, Donyoung Kang, Hyungsuk Lee, Seung-Woo Cho","doi":"10.1016/j.apmt.2024.102318","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102318","url":null,"abstract":"Osteoarthritis (OA) is a common chronic degenerative joint disease characterized by gradual deterioration and pain. Viscosupplementation, involving hyaluronic acid (HA) injection into the affected joint, is a minimally invasive option to reduce pain by improving joint lubrication and potentially avoiding the need for replacement surgery. However, the low adhesion and rapid degradation of HA often lead to inadequate therapeutic effects. In this study, we present lubricating adhesive HA-based hydrogel patches designed to effectively treat OA. The HA patches, modified with pyrogallol, have high elastic and compressive moduli, delaying degradation when exposed to external stimuli. Furthermore, they securely adhere to cartilage tissue surfaces and efficiently lubricate damaged cartilage, leading to a reduced friction and wear. In addition to these benefits, our HA patches exhibit scavenging effect of reactive oxygen species and sustainably release an encapsulated anti-inflammatory drug (dexamethasone: Dex). These features further enhance their therapeutic potential for OA treatment. In a mouse OA model, the hydrogel patches loaded with Dex promote healing of damaged cartilage and restore its motor function. Overall, our bioinspired HA hydrogel patches present a promising treatment option for managing the debilitating joint disease by offering enhanced adhesion, lubrication for cartilage protection, antioxidant effect, and sustained drug release.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"19 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-13DOI: 10.1016/j.apmt.2024.102331
Ling Liu, Jin Wang, Qingwen Li
Radiative cooling (RC) technology achieves passive cooling without consuming additional energy by reflecting sunlight and dissipating heat through the atmospheric transparent window via infrared radiation into the cold outer space. It presents an excellent alternative to address the current challenges of energy shortage and environmental stress. While numerous materials and structures demonstrate robust RC performance, polymers, with their inherent and strong infrared radiation characteristics, exhibit significant potential and possibilities in RC due to their diverse structures with designable chemical bonds and groups, large-scale production capabilities, and ease of manufacturing into RC devices. This review aims to provide a comprehensive summary of recent advances in utilizing polymers for passive daytime radiative cooling. It will explore the relationship between polymer structure and RC performance, discuss design principles for achieving high RC efficiency, examine the production of polymeric materials for coolers, and systematically review and discuss the broad application scenarios of RC polymers. Finally, this review will highlight future perspectives for the development of RC polymers.
{"title":"Passive daytime radiative cooling polymeric materials: Structure design, fabrication, and applications","authors":"Ling Liu, Jin Wang, Qingwen Li","doi":"10.1016/j.apmt.2024.102331","DOIUrl":"https://doi.org/10.1016/j.apmt.2024.102331","url":null,"abstract":"Radiative cooling (RC) technology achieves passive cooling without consuming additional energy by reflecting sunlight and dissipating heat through the atmospheric transparent window via infrared radiation into the cold outer space. It presents an excellent alternative to address the current challenges of energy shortage and environmental stress. While numerous materials and structures demonstrate robust RC performance, polymers, with their inherent and strong infrared radiation characteristics, exhibit significant potential and possibilities in RC due to their diverse structures with designable chemical bonds and groups, large-scale production capabilities, and ease of manufacturing into RC devices. This review aims to provide a comprehensive summary of recent advances in utilizing polymers for passive daytime radiative cooling. It will explore the relationship between polymer structure and RC performance, discuss design principles for achieving high RC efficiency, examine the production of polymeric materials for coolers, and systematically review and discuss the broad application scenarios of RC polymers. Finally, this review will highlight future perspectives for the development of RC polymers.","PeriodicalId":8066,"journal":{"name":"Applied Materials Today","volume":"20 1","pages":""},"PeriodicalIF":8.3,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141775827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：