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Carbon-Coated Three-Dimensional MXene/Iron Selenide Ball with Core–Shell Structure for High-Performance Potassium-Ion Batteries

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Nano-Micro Letters 2022年第1期14卷 278-294页

作者： Su Hyun Yang Yun Jae Lee heemin kang Seung-Keun Park Yun Chan kang Department of Materials Science and Engineering Korea UniversityAnam-DongSeongbuk-GuSeoul 136-713Republic of Korea Department of Advanced Materials Engineering Chung-Ang University4726 Seodong-daeroDaedeok-myeonAnseong-siGyeonggi-do 17546Republic of Korea

Two-dimensional(2D)MXenes are promising as electrode materials for energy storage,owing to their high electronic conductivity and low diffusion ***,similar to most 2D materials,MXene nanosheets easily restack during the electrode preparation,which degrades the electrochemical performance of MXene-based materials.A novel synthetic strategy is proposed for converting MXene into restacking-inhibited three-dimensional(3D)balls coated with iron selenides and *** strategy involves the preparation of Fe_(2)O_(3)@carbon/MXene microspheres via a facile ultrasonic spray pyrolysis and subsequent selenization *** 3D structuring effectively prevents interlayer restacking,increases the surface area,and accelerates ion transport,while maintaining the attractive properties of ***,combining iron selenides and carbon with 3D MXene balls offers many more sites for ion storage and enhances the structural robustness of the composite *** resultant 3D structured microspheres exhibit a high reversible capacity of 410 mAh g^(−1) after 200 cycles at 0.1 A g^(−1) in potassium-ion batteries,corresponding to the capacity retention of 97% as calculated based on 100 *** at a high current density of 5.0 A g^(−1),the composite exhibits a discharge capacity of 169 mAh g^(−1).

关键词： MXene Spray pyrolysis Iron selenide Potassium-ion batteries 3D structures

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Tunable hybrid hydrogels with multicellular spheroids for modeling desmoplastic pancreatic cancer

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Bioactive Materials 2023年第7期25卷 360-373页

作者： Menekse Ermis Natashya Falcone Natan Roberto de Barros Marvin Mecwan Reihaneh Haghniaz Auveen Choroomi Mahsa Monirizad Yeji Lee Jihyeon Song Hyun-Jong Cho Yangzhi Zhu heemin kang Mehmet R.Dokmeci Ali Khademhosseini Junmin Lee Han-Jun Kim Terasaki Institute for Biomedical Innovation(TIBI) Los AngelesCA90024USA Department of Materials Science and Engineering Pohang University of Science and Technology(POSTECH)PohangGyeongbuk37673Republic of Korea College of Pharmacy Kangwon National UniversityChuncheonGangwon24341Republic of Korea Department of Materials Science and Engineering Korea UniversitySeoul02841Republic of Korea Institute for Convergence Research and Education in Advanced Technology Yonsei UniversityIncheon 21983Republic of Korea College of Pharmacy Korea UniversitySejong30019Republic of Korea

The tumor microenvironment consists of diverse,complex etiological *** matrix component of pancreatic ductal adenocarcinoma(PDAC)plays an important role not only in physical properties such as tissue rigidity but also in cancer progression and therapeutic *** significant efforts have been made to model desmoplastic PDAC,existing models could not fully recapitulate the etiology to mimic and understand the progression of ***,two major components in desmoplastic pancreatic matrices,hyaluronic acid-and gelatin-based hydrogels,are engineered to provide matrices for tumor spheroids composed of PDAC and cancer-associated fibroblasts(CAF).Shape analysis profiles reveals that incorporating CAF contributes to a more compact tissue *** expression levels of markers associated with proliferation,epithelial to mesenchymal transition,mechanotransduction,and progression are observed for cancer-CAF spheroids cultured in hyper desmoplastic matrix-mimicking hydrogels,while the trend can be observed when those are cultured in desmoplastic matrix-mimicking hydrogels with the presence of transforming growth factor-β1(TGF-β1).The proposed multicellular pancreatic tumor model,in combination with proper mechanical properties and TGF-β1 supplement,makes strides in developing advanced pancreatic models for resembling and monitoring the progression of pancreatic tumors,which could be potentially applicable for realizing personalized medicine and drug testing applications.

关键词： Pancreatic cancer Desmoplasia Fibrosis Extracellular matrix Tumor microenvironment

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