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Vapor deposition of aluminium oxide into N-rich mesoporous carbon framework as a reversible sulfur host for lithium-sulfur battery cathode

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Nano Research 2021年第1期14卷 131-138页

作者： Fei Sun Zhibin Qu Hua Wang Xiaoyan Liu Tong Pei Rui Han Jihui Gao Guangbo Zhao Yunfeng Lu School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China Department of Chemistry Shanghai Normal UniversityShanghai 150001China Department of Chemical and Biomolecular Engineering University of CaliforniaLos AngelesCA 90095USA

Restraining the shuttle effects of lithium polysulfides is the key to improve the cycling reversibility and stability of lithium-sulfur(Li-S)batteries for which design of robust sulfur hosts has been regarded as the most effective *** this work,we report a new type of hybrid sulfur host which is composed of Al_(2)O_(3) homogenously decorated in nitrogen-rich mesoporous carbon framework(NMC-Al_(2)O_(3)).The NMC-Al_(2)O_(3) hybrid host features a poly-dispersed spherical morphology and a mesoporous configuration with high surface area and large pore volume that can accommodate a high sulfur content up to 73.5 wt.%.As a result,the fabricated NMC-Al_(2)O_(3)-S cathode exhibits all-round improvements in electrochemical properties in term of capacities(1,212 mAh·g^(-1)at 0.2 C;755 mAh·g^(-1)at 2 C),cycling charge-discharge reversibility(sustainably 100%efficiencies)and stability(1,000 cycles with only 0.023%capacity decay per cycle at 0.5 C).By contrast,the Al_(2)O_(3)-free NMC-S cathode shows both decreased capacities and rapidly descending Coulombic efficiencies during *** functional theory(DFH")calculations further reveal that the implanted Al_(2)O_(3) can greatly enhance the chemical adsorption and catalytic conversion for various lithium polysulfides and thereby effectively prevent the polysulfide shuttling and significantly improve the utilizability,reversibility and stability of sulfur cathode.

关键词： lithium-sulfur battery aluminium oxide sulfur host nitrogen-rich carbon mesoporous structure

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Bioceramic-mediated chondrocyte hypertrophy promotes calcified cartilage formation for rabbit osteochondral defect repair

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Bioactive Materials 2024年第10期40卷 306-317页

作者： Rachel H.Koh Junhee Kim Jeong-Uk Kim Seunghyun L.Kim Arun Kumar Rajendran Seunghun SLee Heesoo Lee Joo Hyun Kim Ji Hoon Jeong Yongsung Hwang Jong Woo Bae Nathaniel S.Hwang School of Chemical and Biological Engineering Institute of Chemical ProcessesSeoul National UniversitySeoul08826South Korea Interdisciplinary Program in Bioengineering Seoul National UniversitySeoul08826South Korea Department of Biomedical Engineering Dongguk UniversitySeoul10326South Korea Soonchunhyang Institute of Medi-bio Science(SIMS) Soonchunhyang UniversityCheonan31151South Korea Department of Integrated Biomedical Science Soonchunhyang UniversityAsan31538South Korea Department of Orthopaedic Surgery Konkuk University Chungju HospitalKonkuk University School of MedicineChungju27376South Korea BioMAX Institute Seoul National UniversitySeoul08826South Korea

Osteochondral tissue is a highly specialized and complex tissue composed of articular cartilage and subchondral bone that are separated by a calcified cartilage *** or gradient scaffolds,often in conjunction with stem cells and growth factors,have been developed to mimic the respective layers for osteochondral defect *** this study,we designed a hyaline cartilage-hypertrophic cartilage bilayer graft(RGD/RGDW)with ***,we demonstrated that RGD peptide-modified chondroitin sulfate cryogel(RGD group)is chondro-conductive and capable of hyaline cartilage ***,we incorporated whitlockite(WH),a Mg^(2+)-containing calcium phosphate,into RGD cryogel(RGDW group)to induce chondrocyte hypertrophy and form collagen X-rich hypertrophic *** is the first study to use WH to produce hypertrophic ***-laden RGDW cryogel exhibited significantly upregulated expression of hypertrophy markers in vitro and formed ectopic hypertrophic cartilage in vivo,which mineralized into calcified cartilage in bone ***,RGD cryogel and RGDW cryogel were combined into bilayer(RGD/RGDW group)and implanted into rabbit osteochondral defect,where RGD layer supports hyaline cartilage regeneration and bioceramic-containing RGDW layer promotes calcified cartilage *** the RGD group(monolayer)formed hyaline-like neotissue that extends into the subchondral bone,the RGD/RGDW group(bilayer)regenerated hyaline cartilage tissue confined to its respective layer and promoted osseointegration for integrative defect repair.

关键词： Bioceramic Whitlockite Bilayer scaffold Chondrocyte hypertrophy Osteochondral defect repair

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Organic X-Ray Image Sensors Using a Medium Bandgap Polymer Donor with Low Dark Current

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Energy & Environmental Materials 2024年第6期7卷 230-237页

作者： Jong-Woon Ha Seung Hun Eom Bo Kyung Cha Seyeong Song Hyeong Ju Eun Jong H.Kim Jong Mok Park BongSoo Kim Byoungwook Park Seo-Jin Ko Sung Cheol Yoon Changjin Lee In Hwan Jung Do-Hoon Hwang Department of Chemistry Chemistry Institute for Functional MaterialsPusan National UniversityBusan 46241Korea Division of Advanced Energy Materials Research Center Korea Research Institute of Chemical Technology(KRICT)Daejeon 34114Korea Electro-Medical Device Research Center Korea Electrotechnology Research Institute(KERI)Ansan 15588Korea Graduate School of Carbon Neutrality School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology(UNIST)Ulsan 44919Korea Department of Molecular Science and Technology Ajou UniversitySuwon 16449Korea Research Center for Advanced Specialty Chemicals Korea Research Institute of Chemical TechnologyUlsan 44412Korea Department of Chemistry Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Korea Department of Organic and Nano Engineering Human-Tech Convergence ProgramHanyang University222 Wangsimni-roSeongdong-guSeoul 04763Korea

The development of portable X-ray detectors is necessary for diagnosing fractures in unconscious patients in emergency ***,this is quite challenging because of the heavy weight of the scintillator and silicon *** weight and thickness of X-ray detectors can be reduced by replacing the silicon layer with an organic *** study presents a novel bithienopyrroledione-based polymer donor that exhibits excellent photodetection properties even in a thick photoactive layer(~700 nm),owing to the symmetric backbone and highly soluble molecular structure of *** ability of bithienopyrroledione-based polymer donor to strongly suppress the dark current density(Jd~10−10 A cm^(−2))at a negative bias(−2.0 V)while maintaining high responsivity(R=0.29 A W−1)even at a thickness of 700 nm results in a maximum shot-noise-limited specific detectivity of D_(sh)^(*)=2.18×10^(13)Jones in the organic *** organic photodetectors are developed by slot-die coating for use in X-ray detectors,which exhibit D_(sh)^(*)=2.73×10^(12)Jones with clear rising(0.26 s)and falling(0.29 s)response times upon X-ray *** reliability is also proven by linear response of the X-ray detector,and the X-ray detection limit is 3 mA.

关键词： low dark current low detection limit organic photodetector printable X-ray

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Effect of physical and biological pretreatment on sugarcane bagasse waste-based biogas production

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Materials Today: Proceedings 2023年 87卷 41-44页

作者： Sumardiono S. Matin H.H.A. Sulistianingtias I. Nugroho T.Y. Budiyono B. Department of Chemical Engineering Faculty of Engineering Universitas Diponegoro Semarang 50239 Indonesia Study Program of Environmental Science Faculty of Mathematic and Natural Science Universitas Sebelas Maret Surakarta 57126 Indonesia Vocational School Universitas Diponegoro Semarang 50239 Indonesia

Sugarcane bagasse is a biomass with very potential, especially in agricultural countries. In this research, a study related to pretreatment and the ratio of C/N to biogas production from sugarcane bagasse was conducted. The study was carried out on a laboratory scale with physical pretreatment by grinding with a size of 6 mesh, then biological pretreatment with the microbial consortium 5 % g/V, and variations in the C/N ratio at 25 and 30. Cow rumen fluid was used in this study as a source of anaerobic bacteria and technical urea is used to adjust the C/N ratio. The solid total is set at 7 %. Based on research that has been carried out for 60 days, it was found that physical pretreatment by grinding with a size of 6 mesh can increase biogas production. Biogas production increased both at C/N ratio conditions of 25 and 30. Furthermore, biological pretreatment with the microbial consortium 5 % g/V was proven to increase biogas production at both C/N ratios of 25 and 30. Further studies on the C/N ratio, it was found that the C/N ratio of 25 was better than the C/N ratio of 30. This is evident in several variables, including raw and fine substrate conditions, as well as on variables with or without a microbial consortium, with the amount of biogas productivity at a C/N 25 ratio of 53-90.5 % higher than the C/N 30 ratio. © 2023 The Authors. All rights reserved.

关键词： Biogas Biological pretreatment Physical pretreatment Sugarcane bagasse

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Emerging Strategies in Enhancing Singlet Oxygen Generation of Nano-Photosensitizers Toward Advanced Phototherapy

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Nano-Micro Letters 2022年第7期14卷 293-341页

作者： Mohammad Tavakkoli Yaraki Bin Liu Yen Nee Tan Institute of Materials Research and Engineering The Agency for ScienceTechnology and Research(A*STAR)2 Fusionopolis Way#08-03Innovis 138634Singapore Department of Chemical and Biomolecular Engineering National University of Singapore4 Engineering Drive 4Singapore 117585Singapore Faculty of Science Agriculture and EngineeringNewcastle UniversityNewcastle Upon Tyne NE17RUUK Newcastle Research and Innovation Institute Newcastle University in Singapore80 Jurong East Street 21#05-04Singapore 609607Singapore

The great promise of photodynamic therapy(PDT) has thrusted the rapid progress of developing highly effective photosensitizers(PS) in killing cancerous cells and bacteria. To mitigate the intrinsic limitations of the classical molecular photosensitizers, researchers have been looking into designing new generation of nanomaterial-based photosensitizers(nano-photosensitizers) with better photostability and higher singlet oxygen generation(SOG) efficiency, and ways of enhancing the performance of existing photosensitizers. In this paper, we review the recent development of nano-photosensitizers and nanoplasmonic strategies to enhance the SOG efficiency for better PDT performance. Firstly, we explain the mechanism of reactive oxygen species generation by classical photosensitizers, followed by a brief discussion on the commercially available photosensitizers and their limitations in PDT. We then introduce three types of new generation nanophotosensitizers that can effectively produce singlet oxygen molecules under visible light illumination, i.e., aggregation-induced emission nanodots, metal nanoclusters (< 2 nm), and carbon dots. Different design approaches to synthesize these nano-photosensitizers were also discussed. To further enhance the SOG rate of nano-photosensitizers, plasmonic strategies on using different types of metal nanoparticles in both colloidal and planar metal-PS systems are reviewed. The key parameters that determine the metal-enhanced SOG(ME-SOG) efficiency and their underlined enhancement mechanism are discussed. Lastly, we highlight the future prospects of these nanoengineering strategies, and discuss how the future development in nanobiotechnology and theoretical simulation could accelerate the design of new photosensitizers and ME-SOG systems for highly effective image-guided photodynamic therapy.

关键词： Nano-photosensitizer Reactive oxygen species Aggregation-induced emission Metal nanocluster Carbon dots Metalenhanced singlet oxygen generation

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Unconventional assemblies of bisacylhydrazones:The role of water for circularly polarized luminescence

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Aggregate 2022年第5期3卷 185-193页

作者： Hye Jin Cho Dong Yeun Jeong Hwihyun Moon Taewoo Kim You Kyoung Chung Yeongdong Lee Zonghoon Lee Joonsuk Huh Youngmin You Changsik Song Department of Chemistry Sungkyunkwan UniversitySuwonGyeonggi 16419Republic of Korea Division of Chemical Engineering and Materials Science Graduate Program in System Health Science and EngineeringEwha Womans UniversitySeoul 03760Republic of Korea Center for Multidimensional Carbon Materials Institute for Basic Science(IBS)Department of Materials Science and EngineeringUlsan National Institute of Science and Technology(UNIST)Ulsan 44919Republic of Korea

Understanding the precise molecular arrangement of chiral supramolecular polymers is essential not only to comprehend complex superstructures like proteins and DNA but also for the development of next-generation optoelectronic materials,including materials displaying high-performance circularly polarized luminescence(CPL).Herein,we report the first chiral supramolecular polymer systems based on hydrazone–pyridinium conjugates comprising alkyl chains of different lengths,which afforded control of the apparent supramolecular *** supramolecular chirality is governed basically by the remote chiral centers of alkyl chains,helicity inversion was achieved by controlling the conditions under which the hydrazone building blocks underwent aggregation(i.e.,solvent compositions or temperature).More importantly,the addition of water to the system led to aggregationinduced hydrazone deprotonation,which resulted in a completely different selfassembly *** water molecules played an essential role,forming the assembly’s channel-like backbone,around which hydrazone molecules gathered as a result of hydrogen bonding *** co-assembly of an achiral hydrazone luminophore with the given supramolecular polymer system allowed the fabrication of a novel CPL-active hydrazone-based material exhibiting a high maximum value for the photoluminescence dissymmetry factor of -2.6×10^(-2).

关键词： circularly polarized luminescence(CPL) helicity control hydrazone self-assembly structural water supramolecular polymerization

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Asymmetric crowders and membrane morphology at the nexus of intracellular trafficking and oncology

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Mechanobiology in Medicine 2024年第3期2卷 51-57页

作者： Kshitiz Parihar Seung-Hyun BKo Ryan P.Bradley Phillip Taylor N.Ramakrishnan Tobias Baumgart Wei Guo Valerie M.Weaver Paul A.Janmey Ravi Radhakrishnan Department of Chemical and Biomolecular Engineering School of Engineering and Applied ScienceUniversity of PennsylvaniaPhiladelphiaPAUSA Department of Bioengineering School of Engineering and Applied ScienceUniversity of PennsylvaniaPhiladelphiaPAUSA Department of Chemistry School of Arts&SciencesUniversity of PennsylvaniaPhiladelphiaPAUSA Department of Biology School of Arts&SciencesUniversity of PennsylvaniaPhiladelphiaPAUSA Department of Surgery Center for Bioengineering and Tissue RegenerationUniversity of CaliforniaSan FranciscoSan FranciscoCAUSA Department of Physiology Perelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPAUSA

A definitive understanding of the interplay between protein binding/migration and membrane curvature evolution is emerging but needs further *** mechanisms defining such phenomena are critical to intracellular transport and trafficking of *** trafficking modalities,exosomes have drawn attention in cancer research as these nano-sized naturally occurring vehicles are implicated in intercellular communication in the tumor microenvironment,suppressing anti-tumor immunity and preparing the metastatic niche for progression.A significant question in the field is how the release and composition of tumor exosomes are *** this perspective article,we explore how physical factors such as geometry and tissue mechanics regulate cell cortical tension to influence exosome production by co-opting the biophysics as well as the signaling dynamics of intracellular trafficking pathways and how these exosomes contribute to the suppression of anti-tumor immunity and promote *** describe a multiscale modeling approach whose impact goes beyond the fundamental investigation of specific cellular processes toward actual clinical *** mechanisms are critical to developing and approving liquid biopsy technologies,poised to transform future non-invasive,longitudinal profiling of evolving tumors and resistance to cancer therapies to bring us one step closer to the promise of personalized medicine.

关键词： Multiscale modeling Curvature sensing Morphological transitions Trafficking Oncology

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Theoretical analysis of carbon deposition in the fuel electrode of a reversible solid-oxide cell

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Physical Review Applied 2025年第1期23卷 014005-014005页

作者： Gang Yang Yudong Wang Nengneng Xu Jeremy J. Leger Xiao-Dong Zhou Department of Chemical & Biomolecular Engineering University of Connecticut Storrs Connecticut 06269 USA Center for Clean Energy Engineering University of Connecticut Storrs Connecticut 06269 USA School of Mechanical Aerospace and Manufacturing Engineering University of Connecticut Storrs Connecticut 06269 USA Department of Chemical Engineering University of Louisiana at Lafayette Lafayette Louisiana 70503 USA Department of Material Science and Engineering University of Connecticut Storrs Connecticut 06269 USA

Carbon deposition in reversible solid-oxide cells (RSOCs) can block catalytic sites and may lead to delamination, resulting in performance degradation. In this study, we analyzed the thermodynamics at the fuel electrode of an RSOC during operation by modeling the oxygen chemical potential distribution across the RSOC to predict conditions for carbon deposition. It is found that carbon deposition is more likely to form under solid-oxide electrolysis (SOEC) mode than in solid-oxide fuel cell (SOFC) mode. We then investigated key parameters to suppress carbon deposition, including cell voltage, current density, electrolyte thickness, the electronic and ionic conductivity of electrolytes, and electronic and ionic area-specific resistances (ASRs) of the electrode-electrolyte interfaces. A thin electrolyte and a low ionic ASR of the fuel electrode-electrolyte interface suppress carbon deposition. A low electrolyte electronic conductivity σeEL, a high electrolyte ionic conductivity σiEL, and a low area-specific ionic resistance at the oxygen electrode-electrolyte interface riOE|EL result in a high Faradaic efficiency and enhanced electrolyzer performance, but they also accompany a high thermodynamic driving force for carbon deposition. In addition, maintaining a low cell voltage and a low CO composition in the fuel electrode helps suppress carbon deposition by avoiding and extremely reducing the atmosphere at the fuel electrode-electrolyte interface. A comparison between theoretical analysis and experimental observation is provided to validate our findings.

关键词： Carbon electrodes

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Relationship between drought and soil erosion based on the normalized differential water index(NDWI)and revised universal soil loss equation(RUSLE)model

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Regional Sustainability 2024年第4期5卷 133-144页

作者： Muhammad RENDANA Wan Mohd Razi IDRIS Febrinasti ALIA Supli Effendi RAHIM Muhammad YAMIN Muhammad IZZUDIN Department of Chemical Engineering Faculty of EngineeringUniversitas SriwijayaIndralaya30662Indonesia Master Program of Environmental Management Graduate SchoolUniversitas SriwijayaPalembang30139Indonesia Department of Earth Sciences and Environment Faculty of Science and TechnologyUniversiti Kebangsaan MalaysiaBangi43600Malaysia Department of Civil Engineering Faculty of EngineeringUniversitas SriwijayaIndralaya30662Indonesia Master Program of Agricultural Sciences Graduate Study ProgramUniversitas Muhammadiyah PalembangPalembang30263Indonesia Department of Agribusiness Faculty of AgricultureUniversitas SriwijayaIndralaya30662Indonesia Department of Sociology Faculty of Social and Political SciencesUniversitas SriwijayaIndralaya30662Indonesia

The Langat River Basin in Malaysia is vulnerable to soil erosion risks because of its exposure to intensive land use activities and its topography,which primarily consists of steep slopes and mountainous ***,climate change frequently exposes this basin to drought,which negatively affects soil and water ***,recent studies have rarely shown how soil reacts to drought,such as soil ***,the purpose of this study is to evaluate the relationship between drought and soil erosion in the Langat River *** analyzed drought indices using Landsat 8 satellite images in November 2021,and created the normalized differential water index(NDWI)via Landsat 8 data to produce a drought *** used the revised universal soil loss equation(RUSLE)model to predict soil *** verified an association between the NDWI and soil erosion data using a correlation *** results revealed that the southern and northern regions of the study area experienced drought *** predicted an average annual soil erosion of approximately 58.11 t/(hm^(2)·a).Analysis of the association between the NDWI and soil erosion revealed a strong positive correlation,with a Pearson correlation coefficient of *** assumed that the slope length and steepness factor was the primary contributor to soil erosion in the study *** a result,these findings can help authorities plan effective measures to reduce the impacts of drought and soil erosion in the future.

关键词： Drought Soil erosion Normalized differential water index(NDWI) Revised universal soil loss equation(RUSLE) Langat River Basin

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Enhanced Lithium-Ion Battery Electrodes with Metal–Organic Framework Additives Featuring Undercoordinated Zr4+ Sites

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Advanced Materials 2025年第21期37卷 e2500909页

作者： Shen, Li Liu, Qian Huang, Xuecong Fortini, Alexis Li, Xianyang Tang, Mue Yin, Qingyang Yang, Jinhu Zhang, Chi Lu, Yunfeng School of Chemical Science and Engineering Institute for Advanced Studies Tongji University Shanghai200092 China Department of Chemical and Biomolecular Engineering University of California Los AngelesCA90095 United States School of Chemical Science and Engineering Tongji University Shanghai200092 China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing100029 China

Performances of lithium-ion batteries (LIBs) are dictated by processes of electron-ion separation, transfers, and combination. While carbon additives are routinely used to ensure electronic conductivity, additives capable of simultaneously boosting ion conduction and delivering step-change performance remain elusive. Herein, metal–organic frameworks (MOFs) possessing coordinately unsaturated Zr4+ sites are exploited as a new material library of electrode additives. The MOFs imbue infused electrolytes with an expanded electrochemical stability window (0 to 5 V vs Li/Li⁺) and enhanced Li⁺ transport efficiency. Mechanistically, strong interactions between Zr4+ sites and Li+ solvation sheaths result in trimmed, anion-fixed, and solvent-separated ion pairs, mitigating electrostatic coupling and enabling efficient Li⁺ translocation in the porous nanospace. Concomitantly, these solvation structural modulations foster interfacial and electrochemical stabilities. When implemented at 1.7 wt.% in graphite and sub-Ah full cell, the MOF additives significantly improved Li+ diffusional kinetic, rate capability beyond 2C, and cycling longevity doubling lifespan. This work offers a straightforward yet effective route to remedy the bottlenecks of industrial LIBs. © 2025 Wiley-VCH GmbH.

关键词： Solvation

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