Thermochromic fluorescent materials (TFMs) have garnered great attention due to their unique fluorescence transition responsive to temperature. However, the application of TFMs is limited due to defects such as low thermosensitivity and a high temperature-responsive threshold value. In this case, this work explores a feasible strategy for designing TFMs. On the one hand, a sterically hindered unilateral tetraphenylethylene (TPE) substituent is introduced into pyrene chromophore in a meta-linkage mode. This type of molecular architecture is aimed at the integration of both aggregation-induced emission (AIE) character and isolated π–π pyrene dimer stacking, facilitating the achievement of the high contrast of emission intensity (i.e., strongly emissive aggregation state versus weakly emissive dispersion state) and color (i.e, excimer versus monomer). On the other hand, an effective matrix platform featured with alky chain length-dependent temperature-induced phase transition is constructed to assist the fabrication of desired patterns through temperature-controlled reversible phase transition between crystalline non-dispersion and liquated dispersion states. The findings demonstrate that these studied TFMs can be potentially applied to temperature indicators and switchable dynamic interior decoration, which provides a new avenue for the design of TFMs.
{"title":"Controlling Noncovalent π–π Interactions in Dimers Toward Thermally Reversible Switching Between Monomer and Excimer Fluorescence","authors":"Chang Xi, Xiangyu Zhang, Shiyin Wang, Xinqi Yang, Zhongzhao Yang, Ru Guo, Daojie Yang, Shitong Zhang, Haichao Liu, Bing Yang","doi":"10.1002/adfm.202502079","DOIUrl":"https://doi.org/10.1002/adfm.202502079","url":null,"abstract":"Thermochromic fluorescent materials (TFMs) have garnered great attention due to their unique fluorescence transition responsive to temperature. However, the application of TFMs is limited due to defects such as low thermosensitivity and a high temperature-responsive threshold value. In this case, this work explores a feasible strategy for designing TFMs. On the one hand, a sterically hindered unilateral tetraphenylethylene (TPE) substituent is introduced into pyrene chromophore in a <i>meta-</i>linkage mode. This type of molecular architecture is aimed at the integration of both aggregation-induced emission (AIE) character and isolated π–π pyrene dimer stacking, facilitating the achievement of the high contrast of emission intensity (i.e., strongly emissive aggregation state versus weakly emissive dispersion state) and color (<i>i.e</i>, excimer versus monomer). On the other hand, an effective matrix platform featured with alky chain length-dependent temperature-induced phase transition is constructed to assist the fabrication of desired patterns through temperature-controlled reversible phase transition between crystalline non-dispersion and liquated dispersion states. The findings demonstrate that these studied TFMs can be potentially applied to temperature indicators and switchable dynamic interior decoration, which provides a new avenue for the design of TFMs.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"8 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640952","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}
Tianyi Zhu, Debao Wang, Yisha Wang, Fankun Xu, Jian Huang, Meng Lian, Yufeng Wang, Wei Fan, Yue-E Miao, Jixin Zhu, Dai Hai Nguyen, Chao Zhang, Tianxi Liu
Freeze casting is a versatile technique for organizing low-dimensional building blocks into ordered porous structural materials. However, the freeze-casting fabrication of porous materials with a robust and topologically elastic skeleton to withstand harsh conditions is challenging. Herein, a silanized ultra-homogeneous nanocomposite aerogel is fabricated using a gelation-constrained freeze-casting strategy. Diverging from traditional freeze-casting methods employing a solution precursor, the approach involves a gelation-constrained freeze-casting process utilizing a rational-designed supramolecular hydrogel as the quasi-solid precursor. The low-dimensional building blocks within the hydrogel, enclosed in a dense hydrogen-bonded network, effectively mitigate secondary agglomeration caused by ice crystallization and concentration enrichment during freeze-casting. By forming a topologically elastic cellular skeleton with an interconnected nanoparticle network, the resulting aerogels exhibit exceptional mechanical elasticity retaining over 98% height after 10 000 compression cycles, along with superior electrical properties showing a 78.9% increase in conductivity compared to conventional freeze-casting aerogels. Wearable piezoresistive sensors with these aerogels demonstrate outstanding force sensing capabilities, showing a broad linear range (0–17.6 kPa) and high sensitivity (1.32 kPa−1). When integrated as an intermediate layer in protective garments, these sensors offer exceptional insulation and fire resistance, enabling them to endure harsh conditions like repetitive extreme deformations, exposure to high-temperature flames, and water-erosion damages.
{"title":"Gelation-Constrained Freeze-Casting Fabrication of Ultra-Homogeneous Nanocomposite Aerogels with Superelasticity and Harsh Environment Tolerance","authors":"Tianyi Zhu, Debao Wang, Yisha Wang, Fankun Xu, Jian Huang, Meng Lian, Yufeng Wang, Wei Fan, Yue-E Miao, Jixin Zhu, Dai Hai Nguyen, Chao Zhang, Tianxi Liu","doi":"10.1002/adfm.202503693","DOIUrl":"https://doi.org/10.1002/adfm.202503693","url":null,"abstract":"Freeze casting is a versatile technique for organizing low-dimensional building blocks into ordered porous structural materials. However, the freeze-casting fabrication of porous materials with a robust and topologically elastic skeleton to withstand harsh conditions is challenging. Herein, a silanized ultra-homogeneous nanocomposite aerogel is fabricated using a gelation-constrained freeze-casting strategy. Diverging from traditional freeze-casting methods employing a solution precursor, the approach involves a gelation-constrained freeze-casting process utilizing a rational-designed supramolecular hydrogel as the quasi-solid precursor. The low-dimensional building blocks within the hydrogel, enclosed in a dense hydrogen-bonded network, effectively mitigate secondary agglomeration caused by ice crystallization and concentration enrichment during freeze-casting. By forming a topologically elastic cellular skeleton with an interconnected nanoparticle network, the resulting aerogels exhibit exceptional mechanical elasticity retaining over 98% height after 10 000 compression cycles, along with superior electrical properties showing a 78.9% increase in conductivity compared to conventional freeze-casting aerogels. Wearable piezoresistive sensors with these aerogels demonstrate outstanding force sensing capabilities, showing a broad linear range (0–17.6 kPa) and high sensitivity (1.32 kPa<sup>−1</sup>). When integrated as an intermediate layer in protective garments, these sensors offer exceptional insulation and fire resistance, enabling them to endure harsh conditions like repetitive extreme deformations, exposure to high-temperature flames, and water-erosion damages.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"69 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640977","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}
Alexander Kedzierski, Sina Kheirabadi, Arian Jaberi, Zaman Ataie, Catherine L. Mojazza, Marisa L. Williamson, Anton M. Hjaltason, Aneesh Risbud, Yuanhui Xiang, Amir Sheikhi
Hydrogel Scaffolds
In article number 2417704, Amir Sheikhi and co-workers develop a new class of granular hydrogel scaffolds with hierarchical porosity by fabricating and covalently assembling gelatin methacryloyl (GelMA) porous microgels. These scaffolds feature a significantly higher void fraction compared with those made from nonporous microgels, thereby enhancing cell recruitment and tissue integration. This research may pave the way for developing hierarchically porous translational granular biomaterials, aiming to accelerate endogenous tissue repair.
{"title":"Engineering the Hierarchical Porosity of Granular Hydrogel Scaffolds Using Porous Microgels to Improve Cell Recruitment and Tissue Integration (Adv. Funct. Mater. 12/2025)","authors":"Alexander Kedzierski, Sina Kheirabadi, Arian Jaberi, Zaman Ataie, Catherine L. Mojazza, Marisa L. Williamson, Anton M. Hjaltason, Aneesh Risbud, Yuanhui Xiang, Amir Sheikhi","doi":"10.1002/adfm.202570070","DOIUrl":"https://doi.org/10.1002/adfm.202570070","url":null,"abstract":"<p><b>Hydrogel Scaffolds</b></p><p>In article number 2417704, Amir Sheikhi and co-workers develop a new class of granular hydrogel scaffolds with hierarchical porosity by fabricating and covalently assembling gelatin methacryloyl (GelMA) porous microgels. These scaffolds feature a significantly higher void fraction compared with those made from nonporous microgels, thereby enhancing cell recruitment and tissue integration. This research may pave the way for developing hierarchically porous translational granular biomaterials, aiming to accelerate endogenous tissue repair.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"35 12","pages":""},"PeriodicalIF":18.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.202570070","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143639112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Gilyong Shin, Jae Yoon Baek, Ju Hyeon Kim, Ju Hwan Lee, Hyeong Jun Kim, Byeong Jun So, Yuseung Choi, Sungryul Yun, Taewoo Kim, Jei Gyeong Jeon, Tae June Kang
Quasi-Solid State Thermocells
In article number 2412524, Taewoo Kim, Jei Gyeong Jeon, Tae June Kang, and co-workers present high-performance n-type quasi-solid state thermocells (QTECs) with a copolymer hydrogel that outperforms conventional p-type elements. This hydrogel contains hydrophilic zwitterionic SBMA for ion conduction and hydrophobic MMA for mechanical stability, resulting in a structure that is both ion conductive and durable. Immersion in iron (II/III) chloride electrolyte increases the softness of the hydrogel and optimizes QTEC performance. These hydrogels show great potential for practical applications in wearable devices, effectively harnessing body heat or powering sensors.
{"title":"Mechanically Adaptable High-Performance p(SBMA-MMA) Copolymer Hydrogel with Iron (II/III) Perchlorate for Wearable Thermocell Applications (Adv. Funct. Mater. 12/2025)","authors":"Gilyong Shin, Jae Yoon Baek, Ju Hyeon Kim, Ju Hwan Lee, Hyeong Jun Kim, Byeong Jun So, Yuseung Choi, Sungryul Yun, Taewoo Kim, Jei Gyeong Jeon, Tae June Kang","doi":"10.1002/adfm.202570067","DOIUrl":"https://doi.org/10.1002/adfm.202570067","url":null,"abstract":"<p><b>Quasi-Solid State Thermocells</b></p><p>In article number 2412524, Taewoo Kim, Jei Gyeong Jeon, Tae June Kang, and co-workers present high-performance n-type quasi-solid state thermocells (QTECs) with a copolymer hydrogel that outperforms conventional p-type elements. This hydrogel contains hydrophilic zwitterionic SBMA for ion conduction and hydrophobic MMA for mechanical stability, resulting in a structure that is both ion conductive and durable. Immersion in iron (II/III) chloride electrolyte increases the softness of the hydrogel and optimizes QTEC performance. These hydrogels show great potential for practical applications in wearable devices, effectively harnessing body heat or powering sensors.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"35 12","pages":""},"PeriodicalIF":18.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.202570067","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143639162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Electrochemical nitrate reduction reaction (NO3RR) can effectively alleviate nitrate pollution and simultaneously realize ammonia electrosynthesis at room temperature. However, it remains a significant challenge for NO3RR to achieve high Faradic efficiency in a full concentration range. Herein, nanoflower-like copper-palladium alloy/CuO heterostructure (CuPd/CuO@NF) is successfully fabricated by the hydrothermal synthesis of CuO nanoflowers and subsequent formation of CuPd alloy. The as-obtained CuPd/CuO@NF exhibits remarkable electrochemical performance for NO3RR in the NO3−-N range from 20 to 1400 ppm, especially with NO3− conversion rate of 97.8% and NH3 selectivity of 99.3% at 20 ppm, Faradic efficiency of 94.2% and NH3 yield rate of 1.37 mmol h−1 cm−2 at 1400 ppm. In-situ Fourier transform infrared spectroscopy and Raman spectra reveal that CuPd/CuO@NF first catalyzes NO3− reduction to NO2−, which is rapidly reduced to NH3 by forming *NH, *NH2, and *NH2OH intermediates. Density functional theory calculations suggest that the NHO route is thermodynamically favorable. When CuPd/CuO@NF is applied in zinc-nitrate battery, it demonstrates a maximum power density of 53.7 mW cm−2, with NO3− conversion of 99.9% and Faradic efficiency of 94.4%. This work offers valuable insights into the design of novel NO3RR electrocatalysts and zinc-nitrate batteries.
{"title":"Nanoflower-Like CuPd/CuO Heterostructure for an Energy-Output Electrocatalytic System Coupling Ammonia Electrosynthesis and Zinc-Nitrate Battery","authors":"Jingsha Li, Lvfei Liu, Shunyuan Huang, Haiyan Wang, Yougen Tang, Chunmei Zhang, Feng Du, Ruguang Ma, Changming Li, Chunxian Guo","doi":"10.1002/adfm.202501527","DOIUrl":"https://doi.org/10.1002/adfm.202501527","url":null,"abstract":"Electrochemical nitrate reduction reaction (NO<sub>3</sub>RR) can effectively alleviate nitrate pollution and simultaneously realize ammonia electrosynthesis at room temperature. However, it remains a significant challenge for NO<sub>3</sub>RR to achieve high Faradic efficiency in a full concentration range. Herein, nanoflower-like copper-palladium alloy/CuO heterostructure (CuPd/CuO@NF) is successfully fabricated by the hydrothermal synthesis of CuO nanoflowers and subsequent formation of CuPd alloy. The as-obtained CuPd/CuO@NF exhibits remarkable electrochemical performance for NO<sub>3</sub>RR in the NO<sub>3</sub><sup>−</sup>-N range from 20 to 1400 ppm, especially with NO<sub>3</sub><sup>−</sup> conversion rate of 97.8% and NH<sub>3</sub> selectivity of 99.3% at 20 ppm, Faradic efficiency of 94.2% and NH<sub>3</sub> yield rate of 1.37 mmol h<sup>−1</sup> cm<sup>−2</sup> at 1400 ppm. In-situ Fourier transform infrared spectroscopy and Raman spectra reveal that CuPd/CuO@NF first catalyzes NO<sub>3</sub><sup>−</sup> reduction to NO<sub>2</sub><sup>−</sup>, which is rapidly reduced to NH<sub>3</sub> by forming *NH, *NH<sub>2</sub>, and *NH<sub>2</sub>OH intermediates. Density functional theory calculations suggest that the NHO route is thermodynamically favorable. When CuPd/CuO@NF is applied in zinc-nitrate battery, it demonstrates a maximum power density of 53.7 mW cm<sup>−2</sup>, with NO<sub>3</sub><sup>−</sup> conversion of 99.9% and Faradic efficiency of 94.4%. This work offers valuable insights into the design of novel NO<sub>3</sub>RR electrocatalysts and zinc-nitrate batteries.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"16 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640979","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}
Runfeng Cao, Zhenying Chen, Qing Ye, Weiyan Sun, Weikang Lin, Hai Tang, Xingseng Yang, Junhao Liang, Yi Chen, Lei Wang, Qingfeng Bai, Ziying Pan, Yulong Hu, Dong Xie, Deping Zhao, Yong Hu, Chang Chen
Tissue-Specific Aptamer Matrices
In article number 2409071, Dong Xie, Deping Zhao, Yong Hu, Chang Chen, and co-workers successfully engineer a biomimetic trachea with regenerated vascular connective tissue scattered between avascular cartilage rings using the assembly of two distinct tissue-specific aptamer matrices. This approach fosters the development of (a)vascular niches in reconstructed trachea after end-to-end anastomosis, along with optimal structural, mechanical, and physiological features.
{"title":"Aptamer-Directed Bidirectional Modulation of Vascular Niches for Promoted Regeneration of Segmental Trachea Defect (Adv. Funct. Mater. 12/2025)","authors":"Runfeng Cao, Zhenying Chen, Qing Ye, Weiyan Sun, Weikang Lin, Hai Tang, Xingseng Yang, Junhao Liang, Yi Chen, Lei Wang, Qingfeng Bai, Ziying Pan, Yulong Hu, Dong Xie, Deping Zhao, Yong Hu, Chang Chen","doi":"10.1002/adfm.202570068","DOIUrl":"https://doi.org/10.1002/adfm.202570068","url":null,"abstract":"<p><b>Tissue-Specific Aptamer Matrices</b></p><p>In article number 2409071, Dong Xie, Deping Zhao, Yong Hu, Chang Chen, and co-workers successfully engineer a biomimetic trachea with regenerated vascular connective tissue scattered between avascular cartilage rings using the assembly of two distinct tissue-specific aptamer matrices. This approach fosters the development of (a)vascular niches in reconstructed trachea after end-to-end anastomosis, along with optimal structural, mechanical, and physiological features.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"35 12","pages":""},"PeriodicalIF":18.5,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.202570068","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shanghua Xing, Abdulrahman Mohabbat, István Boldog, Jens Möllmer, Marcus Lange, Yulyan Haiduk, Tobias Heinen, Vladimir Pankov, Oliver Weingart, Christoph Janiak
Selective capture of sulfur dioxide (SO2), important in the context of environmental protection, is reachable by specially tailored porous materials endowed with physisorptive complementarity. Metal–organic frameworks (MOFs) can potentially be leading materials for physisorptive SO2 capture due to their excellent tailorability. Here, a series of highly stable DMOFs, [Ni2L2(DABCO)], where L = 1,4-benzenedicarboxylate (BDC), 1,4-naphthalenedicarboxylate (NDC), 2,6-naphthalenedicarboxylate (2,6-NDC), 9,10-anthracendicarboxylate (ADC), and 1,4-diazabicyclo[2,2,2]octane (DABCO) aiming at optimal SO2 physisorption characteristics, is reported. The extension of the aromatic core by conjugated benzene rings allows to reach an optimal pore diameter at 4–5 Å in the case of the DMOF-ADC, maximizing the multi-site MOF···SO2 interactions, which improve the SO2 binding at low concentrations, as revealed by density-functional theory (DFT) calculations. The improved SO2 separation performance of DMOF-ADC is demonstrated by single SO2 and SO2/CO2-mixed-component adsorption (a SO2/CO2 selectivity >100 is reached at 0.01 bar, which is significantly better than the value for the benchmark DUT-8 material) and dynamic breakthrough experiment. The use as a chemiresistive sensor for SO2 sensing is demonstrated for the best performing DMOF-ADC at low concentrations (doubled resistive response at 100 ppm and T < 120 °C).
{"title":"Rational Fine-Tuning of MOF Pore Metrics: Enhanced SO2 Capture and Sensing with Optimal Multi-Site Interactions","authors":"Shanghua Xing, Abdulrahman Mohabbat, István Boldog, Jens Möllmer, Marcus Lange, Yulyan Haiduk, Tobias Heinen, Vladimir Pankov, Oliver Weingart, Christoph Janiak","doi":"10.1002/adfm.202503013","DOIUrl":"https://doi.org/10.1002/adfm.202503013","url":null,"abstract":"Selective capture of sulfur dioxide (SO<sub>2</sub>), important in the context of environmental protection, is reachable by specially tailored porous materials endowed with physisorptive complementarity. Metal–organic frameworks (MOFs) can potentially be leading materials for physisorptive SO<sub>2</sub> capture due to their excellent tailorability. Here, a series of highly stable DMOFs, [Ni<sub>2</sub>L<sub>2</sub>(DABCO)], where L = 1,4-benzenedicarboxylate (BDC), 1,4-naphthalenedicarboxylate (NDC), 2,6-naphthalenedicarboxylate (2,6-NDC), 9,10-anthracendicarboxylate (ADC), and 1,4-diazabicyclo[2,2,2]octane (DABCO) aiming at optimal SO<sub>2</sub> physisorption characteristics, is reported. The extension of the aromatic core by conjugated benzene rings allows to reach an optimal pore diameter at 4–5 Å in the case of the DMOF-ADC, maximizing the multi-site MOF···SO<sub>2</sub> interactions, which improve the SO<sub>2</sub> binding at low concentrations, as revealed by density-functional theory (DFT) calculations. The improved SO<sub>2</sub> separation performance of DMOF-ADC is demonstrated by single SO<sub>2</sub> and SO<sub>2</sub>/CO<sub>2</sub>-mixed-component adsorption (a SO<sub>2</sub>/CO<sub>2</sub> selectivity >100 is reached at 0.01 bar, which is significantly better than the value for the benchmark DUT-8 material) and dynamic breakthrough experiment. The use as a chemiresistive sensor for SO<sub>2</sub> sensing is demonstrated for the best performing DMOF-ADC at low concentrations (doubled resistive response at 100 ppm and <i>T</i> < 120 °C).","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"11 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640943","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}
In the field of bioadhesives, the development of machinable adhesives with a “glue-to-gel transition” remains a significant challenge. This study presents a novel design strategy to endow the Gel/Eg adhesive with mechanical machinability. It leverages a combination of hydrogen bond interactions, metal complexation, and the secondary structure of gelatin through a one-step mixing method. Rheological analysis shows that the adhesive exhibits a frequency-dependent “glue-to-gel transition,” maintaining a glue state at low frequencies and transitioning to a gel state at higher frequencies. During stretching, the β-sheet structure transforms into a random coil structure. Moreover, the adhesive features excellent water resistance, a low water swelling ratio, strong adhesion strength, high extensibility, instantaneous adhesion, instantaneous self-healing, and both biocompatibility and hemocompatibility. These attributes enable the Gel/Eg adhesive to exhibit multiple fault-tolerance capabilities on tissue surfaces, highlighting its potential for diverse biomedical applications.
{"title":"A Gelatin-Based Bioadhesive Featuring Mechanically Induced Glue-To-Gel Transition","authors":"Wencheng Liang, Kun Lei, Jiakang Zhang, Miao Yang, Shen Wang, Shanshan Yan, Feng Lin, Jiangang Yu, Guoqing Liu, Xiuping Wan, Yan Xie","doi":"10.1002/adfm.202501016","DOIUrl":"https://doi.org/10.1002/adfm.202501016","url":null,"abstract":"In the field of bioadhesives, the development of machinable adhesives with a “glue-to-gel transition” remains a significant challenge. This study presents a novel design strategy to endow the <i>Gel/Eg</i> adhesive with mechanical machinability. It leverages a combination of hydrogen bond interactions, metal complexation, and the secondary structure of gelatin through a one-step mixing method. Rheological analysis shows that the adhesive exhibits a frequency-dependent “glue-to-gel transition,” maintaining a glue state at low frequencies and transitioning to a gel state at higher frequencies. During stretching, the β-sheet structure transforms into a random coil structure. Moreover, the adhesive features excellent water resistance, a low water swelling ratio, strong adhesion strength, high extensibility, instantaneous adhesion, instantaneous self-healing, and both biocompatibility and hemocompatibility. These attributes enable the <i>Gel/Eg</i> adhesive to exhibit multiple fault-tolerance capabilities on tissue surfaces, highlighting its potential for diverse biomedical applications.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"33 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640980","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}
Porous carbon materials (PCMs) have long played key roles in energy storage and conversion fields, known for their abundant raw materials, tunable pore structures, large surface area, and excellent conductivity. Despite significant progress, there remains a substantial gap between the precise design of PCMs and the full utilization of their unique properties for developing high-performance electrode materials. Herein, this review systematically and comprehensively introduces PCMs from traditional synthesis, machine learning-assisted design principles to their energy storage and conversion applications. Specifically, the preparation methods for microporous, mesoporous, macroporous, and hierarchically porous carbon materials are thoroughly summarized, with an emphasis on structural control rules and formation mechanisms. It also highlights the unique advantages of PCMs in alkali metal-ion batteries, metal–sulfur batteries, supercapacitors, and electrocatalysis. Insights from in situ and operando characterizations provide a deep understanding of the correlation between structure and performance. Finally, current challenges and future directions are discussed, emphasizing the need for further advancements to meet evolving energy storage and conversion demands. This review offers valuable guidance for the rational design of high-performance porous carbon electrode materials, and points out key research directions for future development.
{"title":"Porous Carbon Materials: from Traditional Synthesis, Machine Learning-Assisted Design, to Their Applications in Advanced Energy Storage and Conversion","authors":"Haitao Li, Qingchun Yan, Jihao Li, Jieshan Qiu, Haijiao Zhang","doi":"10.1002/adfm.202504272","DOIUrl":"https://doi.org/10.1002/adfm.202504272","url":null,"abstract":"Porous carbon materials (PCMs) have long played key roles in energy storage and conversion fields, known for their abundant raw materials, tunable pore structures, large surface area, and excellent conductivity. Despite significant progress, there remains a substantial gap between the precise design of PCMs and the full utilization of their unique properties for developing high-performance electrode materials. Herein, this review systematically and comprehensively introduces PCMs from traditional synthesis, machine learning-assisted design principles to their energy storage and conversion applications. Specifically, the preparation methods for microporous, mesoporous, macroporous, and hierarchically porous carbon materials are thoroughly summarized, with an emphasis on structural control rules and formation mechanisms. It also highlights the unique advantages of PCMs in alkali metal-ion batteries, metal–sulfur batteries, supercapacitors, and electrocatalysis. Insights from in situ and operando characterizations provide a deep understanding of the correlation between structure and performance. Finally, current challenges and future directions are discussed, emphasizing the need for further advancements to meet evolving energy storage and conversion demands. This review offers valuable guidance for the rational design of high-performance porous carbon electrode materials, and points out key research directions for future development.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"55 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640944","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}
Kangkang Meng, Xiwen Zhang, Yang Chen, Xiao Deng, Tao Zhu, Takashi Kikkawa, Yong Wu, Jikun Chen, Eiji Saitoh, Xiaoguang Xu, Yong Jiang, Lei Shen
An important goal of spintronics research is to discover efficient methods for generating spin currents. Generally, symmetry conditions constrain spin polarization to be orthogonal to both the charge and spin currents in nonmagnetic metals. However, certain systems with low structural symmetry may permit the generation of spin currents with different orientations. Here, the observation of non-orthogonal spin current in PtMnGa thin film is reported, where the composition gradient of Pt and Mn along the film normal direction results in mirror symmetry breaking about the film plane. Through second harmonic Hall (SHH) resistance, spin-torque ferromagnetic resonance (ST-FMR), and spin-orbit torques induced magnetization switching measurements on the PtMnGa/ferromagnets films, the robust generation of spin currents with sx, sy, and sz polarizations in PtMnGa are confirmed, which is supported by density functional theory calculations. The spin Hall angles for the si(i = x, y, z) are calculated using both SHH and ST-FMR methods, yielding consistent results. Furthermore, a zero-field partial magnetization switching is realized in perpendicularly magnetized PtMnGa/Co/Pt multilayers due to the presence of sx and sz spin currents. These results demonstrate that the PtMnGa can be a promising spin current source, providing a key strategy for finding new device functionalities.
{"title":"Non-Orthogonal Spin Current in PtMnGa","authors":"Kangkang Meng, Xiwen Zhang, Yang Chen, Xiao Deng, Tao Zhu, Takashi Kikkawa, Yong Wu, Jikun Chen, Eiji Saitoh, Xiaoguang Xu, Yong Jiang, Lei Shen","doi":"10.1002/adfm.202426088","DOIUrl":"https://doi.org/10.1002/adfm.202426088","url":null,"abstract":"An important goal of spintronics research is to discover efficient methods for generating spin currents. Generally, symmetry conditions constrain spin polarization to be orthogonal to both the charge and spin currents in nonmagnetic metals. However, certain systems with low structural symmetry may permit the generation of spin currents with different orientations. Here, the observation of non-orthogonal spin current in PtMnGa thin film is reported, where the composition gradient of Pt and Mn along the film normal direction results in mirror symmetry breaking about the film plane. Through second harmonic Hall (SHH) resistance, spin-torque ferromagnetic resonance (ST-FMR), and spin-orbit torques induced magnetization switching measurements on the PtMnGa/ferromagnets films, the robust generation of spin currents with <i>s<sub>x</sub></i>, <i>s<sub>y</sub></i>, and <i>s<sub>z</sub></i> polarizations in PtMnGa are confirmed, which is supported by density functional theory calculations. The spin Hall angles for the <i>s</i><sub><i>i</i>(<i>i</i> = <i>x</i>, <i>y</i>, <i>z</i>)</sub> are calculated using both SHH and ST-FMR methods, yielding consistent results. Furthermore, a zero-field partial magnetization switching is realized in perpendicularly magnetized PtMnGa/Co/Pt multilayers due to the presence of <i>s<sub>x</sub></i> and <i>s<sub>z</sub></i> spin currents. These results demonstrate that the PtMnGa can be a promising spin current source, providing a key strategy for finding new device functionalities.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"16 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143640972","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}
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