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Injectable nanofiber-reinforced bone cement with controlled biodegradability for minimally-invasive bone regeneration

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Bioactive materials 2023年第3期21卷 267-283页

作者： Peihao Cai Shunyi Lu Jieqin Yu Lan Xiao Jiayi Wang Haifeng Liang Lei Huang Guanjie Han Mengxuan Bian Shihao Zhang Jian Zhang Changsheng Liu Libo Jiang Yulin Li The Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic ChemistryEngineering Research Center for Biomedical Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China Department of Orthopaedic Surgery Zhongshan HospitalFudan UniversityShanghai200032China Centre for Biomedical Technologies School of MechanicalMedical and Process EngineeringQueensland University of TechnologyBrisbane4059Australia

Injectable materials show their special merits in regeneration of damaged/degenerated bones in minimally-invasive *** calcium phosphate bone cement(CPC)has attracted broad attention for its bioactivity,as compared to non-degradable polymethyl methacrylate ***,its brittleness,poor anti-washout property and uncontrollable biodegradability are the main challenges to limit its further clinical application mainly because of its stone-like dense structure and fragile inorganic-salt ***,we developed a kind of injectable CPC bone cement with porous structure and improved robustness by incorporating poly(lactide-co-glycolic acid)(PLGA)nanofiber into CPC,with carboxymethyl cellulose(CMC)to offer good injectability as well as anti-wash-out ***,the introduction of PLGA and CMC also enabled a formation of initial porous structure in the cements,where PLGA nanofiber endowed the cement with a dynamically controllable biodegradability which provided room for cell movement and bone ***-estingly,the reinforced biodegradable cement afforded a sustainable provision of Ca^(2+)bioactive components,together with its porous structure,to improve synergistically new bone formation and osteo-integration in vivo by using a rat model of femur condyle *** study on regenerative mechanisms indicated that the good minimally-invasive bone regeneration may come from the synergistic enhanced osteogenic effect of calcium ion enrichment and the improved revascularization capacity contributed from the porosity as well as the lactic acid released from PLGA *** results indicate the injectable bone cement with high strength,anti-washout property and controllable biodegradability is a promising candidate for bone regeneration in a minimally-invasive approach.

关键词： Injectable calcium phosphate cement Biodegradable PLGA nanofiber Angiogenesis Osseointegration Minimally-invasive bone regeneration

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Radiopaque FeMnN-Mo composite drawn filled tubing wires for braided absorbable neurovascular devices

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Bioactive materials 2024年第10期40卷 74-87页

作者： Adam J.Griebel Petra Maier Henry Summers Benjamin Clausius Isabella Kanasty Weilue He Nicholas Peterson Carolyn Czerniak Alexander A.Oliver David F.Kallmes Ramanathan Kadirvel Jeremy E.Schaffer Roger J.GuilloryⅡ Fort Wayne Metals Fort WayneINUSA School of Mechanical Engineering Stralsund University of Applied SciencesStralsundDEUSA Department of Materials Science and Engineering Michigan Technological UniversityUSA Department of Biomedical Engineering Michigan Technological UniversityUSA Department of Biological Sciences Michigan Technological UniversityUSA Joint Department of Biomedical Engineering Medical College of WisconsinMarquette UniversityUSA Department of Radiology Mayo ClinicRochesterMNUSA Department of Neurosurgery Mayo ClinicRochesterMNUSA

Flow diverter devices are small stents used to divert blood flow away from aneurysms in the brain,stagnating flow and inducing intra-aneurysmal thrombosis which in time will prevent aneurysm *** devices are formed from thin(~25μm)wires which will remain in place long after the aneurysm has been *** their continued presence could lead to secondary complications,an absorbable flow diverter which dissolves into the body after aneurysm occlusion is *** absorbable metals investigated to date struggle to achieve the necessary combination of strength,elasticity,corrosion rate,fragmentation resistance,radiopacity,and *** work proposes and investigates a new composite wire concept combining absorbable iron alloy(FeMnN)shells with one or more pure molybdenum(Mo)*** wire configurations are produced and drawn to 25–250μm *** testing revealed high and tunable mechanical properties on par with existing flow diverter *** vitro degradation testing of 100μm wire in DMEM to 7 days indicated progressive corrosion and cracking of the FeMnN shell but not of the Mo,confirming the cathodic protection of the Mo by the FeMnN and thus mitigation of premature fragmentation *** vivo implantation and subsequentμCT of the same wires in mouse aortas to 6 months showed meaningful corrosion had begun in the FeMnN shell but not yet in the Mo filament *** total,these results indicate that these composites may offer an ideal combination of properties for absorbable flow diverters.

关键词： corrosion composite filled

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Surface phase diagram of CsSnI3 from first-principles calculations

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Physical Review materials 2024年第9期8卷 093401页

作者： Kejia Li Chadawan Khamdang Mengen Wang Department of Electrical and Computer Engineering Materials Science and Engineering Program

CsSnI3 is widely studied as an environmentally friendly Pb-free perovskite material for optoelectronic device applications. To further improve material and device performance, it is important to understand the surface structures of CsSnI3. We generate surface structures with various stoichiometries, perform density functional theory calculations to create phase diagrams of the CsSnI3 (001), (110), and (100) surfaces, and determine the most stable surfaces under a wide range of Cs, Sn, and I chemical potentials. Under I-rich conditions, surfaces with Cs vacancies are stable, which lead to partially occupied surface states above the valence band maximum. Under I-poor conditions, we find the stoichiometric (100) surface to be stable under a wide region of the phase diagram, which does not have any surface states and can contribute to long charge-carrier lifetimes. Consequently, the I-poor (Sn-rich) conditions will be more beneficial to improve the device performance.

关键词： Electronic structure Surface reconstruction Surface states Perovskites Semiconductors Density functional theory

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Ultralow-voltage hydrogen production and simultaneous Rhodamine B beneficiation in neutral wastewater

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Journal of Energy Chemistry 2023年第6期81卷 574-582,I0013页

作者： Xiang Peng Song Xie Shijian Xiong Rong Li Peng Wang Xuming Zhang Zhitian Liu Liangsheng Hu Biao Gao Peter Kelly Paul K.Chu Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Hubei Engineering Technology Research Center of Optoelectronic and New Energy MaterialsSchool of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205HubeiChina Department of Physics Department of Materials Science and EngineeringDepartment of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloon 999077Hong KongChina State Key Laboratory of Refractories and Metallurgy and Institute of Advanced Materials and Nanotechnology Wuhan University of Science and TechnologyWuhan 430081HubeiChina Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou UniversityShantou 515063GuangdongChina Surface Engineering Group Manchester Metropolitan UniversityManchester M15GDUK

Electrocatalytic water splitting for hydrogen production is hampered by the sluggish oxygen evolution reaction(OER)and large power consumption and replacing the OER with thermodynamically favourable reactions can improve the energy conversion *** iron corrodes easily and even self-corrodes to form magnetic iron oxide species and generate corrosion currents,a novel strategy to integrate the hydrogen evolution reaction(HER)with waste Fe upgrading reaction(FUR)is proposed and demonstrated for energy-efficient hydrogen production in neutral *** heterostructured MoSe_(2)/MoO_(2) grown on carbon cloth(MSM/CC)shows superior HER performance to that of commercial Pt/C at high current *** replacing conventional OER with FUR,the potential required to afford the anodic current density of 10 m A cm^(-2)decreases by 95%.The HER/FUR overall reaction shows an ultralow voltage of 0.68 V for 10 m A cm^(-2)with a power equivalent of 2.69 k Wh per m^(3)H_(2).Additionally,the Fe species formed at the anode extract the Rhodamine B(Rh B)pollutant by flocculation and also produce nanosized magnetic powder and beneficiated Rh B for value-adding *** work demonstrates both energy-saving hydrogen production and pollutant recycling without carbon emission by a single system and reveals a new direction to integrate hydrogen production with environmental recovery to achieve carbon neutrality.

关键词： Energy-saving hydrogen production Hydrogen evolution reaction Neutral water splitting MoSe_(2)/MoO_(2)heterostructure Environmental recovery

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Homojunction structure amorphous oxide thin film transistors with ultra-high mobility

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Journal of Semiconductors 2023年第5期44卷 19-26页

作者： Rongkai Lu Siqin Li Jianguo Lu Bojing Lu Ruqi Yang Yangdan Lu Wenyi Shao Yi Zhao Liping Zhu Fei Zhuge Zhizhen Ye State Key Laboratory of Silicon Materials Key Laboratory for Biomedical Engineering of Ministry of EducationSchool of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Wenzhou Key Laboratory of Novel Optoelectronic and Nano Materials Institute of WenzhouZhejiang UniversityWenzhou 325006China Department of Electronic Science and Technology College of Information Science and Electronic EngineeringZhejiang UniversityHangzhou 310027China Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China

Amorphous oxide semiconductors(AOS)have unique advantages in transparent and flexible thin film transistors(TFTs)applications,compared to low-temperature polycrystalline-Si(LTPS).However,intrinsic AOS TFTs are difficult to obtain field-effect mobility(μFE)higher than LTPS(100 cm^(2)/(V·s)).Here,we design ZnAlSnO(ZATO)homojunction structure TFTs to obtainμFE=113.8 cm^(2)/(V·s).The device demonstrates optimized comprehensive electrical properties with an off-current of about1.5×10^(-11)A,a threshold voltage of–1.71 V,and a subthreshold swing of 0.372 V/*** are two kinds of gradient coupled in the homojunction active layer,which are micro-crystallization and carrier suppressor concentration gradient distribution so that the device can reduce off-current and shift the threshold voltage positively while maintaining high field-effect *** research in the homojunction active layer points to a promising direction for obtaining excellent-performance AOS TFTs.

关键词： thin film transistors homojunction carrier mobility amorphous oxides

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Cationic starch microparticles with integrated antibacterial and hemostatic performance

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science China(Technological sciences) 2024年第10期67卷 3235-3246页

作者： SU Yang NIU MengXin XU KaiDong XU Chen YANG PeiLang HU Yang XU Fu-Jian Key Lab of Biomedical Materials of Natural Macromolecules(Beijing University of Chemical Technology Ministry of Education)Beijing Laboratory of Biomedical MaterialCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China Department of Burn Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200025China

It is urgently demanded to develop biomaterials with balanced hemostatic/antibacterial ability and facile preparation *** this work,cationic starch microparticles(MSQP),prepared by the facile grafting of microporous starch particles(MS)with tunable quaternized polyethyleneimine,were readily constructed as promising hemostatic materials for integrated antibacterial and hemostatic *** cationic grafts not only endowed MSQP with good antibacterial ability,but also benefited from biocompatible MS to achieve favorable ***,in vitro results confirmed the superior hemostatic property of MSQP2(with the medium content of cationic grafts)among three MSQP and pristine *** investigating the bloodmaterial interactions of MSQP/MS,the procoagulant mechanism of MSQP2 was revealed that the optimal amount of cationic grafts achieves highly balanced plasma-protein adhesion,platelet adhesion and blood coagulation *** vivo artery-injury model further demonstrated the superior hemostatic performance of MSQP2 for potential severe *** work sheds light on the design of cationic polymer-based biomaterials for balanced antibacterial and hemostatic functions.

关键词： hemostasis antibacterial cationic polymer microparticles

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High sound pressure piezoelectric micromachined ultrasonic transducers using sputtered potassium sodium niobate

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Microsystems & Nanoengineering 2024年第6期10卷 311-323页

作者： Fan Xia Yande Peng Wei Yue Mingze Luo Megan Teng Chun-Ming Chen Sedat Pala Xiaoyang Yu Yuanzheng Ma Megha Acharya Ryuichi Arakawa Lane W.Martin Liwei Lin Department of Mechanical Engineering University of CaliforniaBerkeleyCA 94720USA School of Electronic Science and Engineering Southeast UniversityNanjingJiangsu 210096China Bioengineering and Biomedical Engineering Xi’an Jiaotong UniversityXi’anShaanxi 710049China Tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055China Department of Materials Science and Engineering University of CaliforniaBerkeleyCA 94720USA Scientific Research Laboratory Div. Niterra Co.LtdNagoya 461-0005Japan Departments of Materials Science and NanoEngineering Chemistryand Physics and Astronomy and the Rice Advanced Materials InstituteRice UniversityHoustonTX 77005USA

This work presents air-coupled piezoelectric micromachined ultrasonic transducers(pMUTs)with high sound pressure level(SPL)under low-driving voltages by utilizing sputtered potassium sodium niobate K0.34Na0.66NbO3(KNN)films.A prototype single KNN pMUT has been tested to show a resonant frequency at 106.3 kHz under 4 Vp-p with outstanding characteristics:(1)a large vibration amplitude of 3.74μm/V,and(2)a high acoustic root mean square(RMS)sound pressure level of 105.5 dB/V at 10 cm,which is 5–10 times higher than those of AlN-based pMUTs at a similar *** are various potential sensing and actuating applications,such as fingerprint sensing,touch point,and gesture *** this work,we present demonstrations in three fields:haptics,loudspeakers,and *** haptics,an array of 15×15 KNN pMUTs is used as a non-contact actuator to provide a focal pressure of around 160.3 dB RMS SPL at a distance of 15 *** represents the highest output pressure achieved by an airborne pMUT for haptic sensation on human *** used as a loudspeaker,a single pMUT element with a resonant frequency close to the audible range at 22.8 kHz is *** is shown to be able to generate a uniform acoustic output with an amplitude modulation *** the rangefinder application,pulse-echo measurements using a single pMUT element demonstrate good transceiving results,capable of detecting objects up to 2.82 m *** such,this new class of high-SPL and low-driving-voltage pMUTs could be further extended to other applications requiring high acoustic pressure and a small form factor.

关键词： potassium piezoelectric sound

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Recent advances in multidimensional(1D,2D,and 3D)Joule heating devices based on cellulose:Design,structure,application,and perspective

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材料科学技术（英文版） 2025年第2期205卷 53-78页

作者： Chuanyin Xiong Mengjie Zhao Tianxu Wang Jing Han Yongkang Zhang Zhao Zhang Xianglin Ji Qing Xiong Yonghao Ni College of Bioresources Chemical & Materials Engineering Shaanxi University of Science and TechnologyXi'an 710021China School of Materials Science and Engineering Tianjin Polytechnic UniversityTianjin 300387China Oxford-CityU Centre for Cerebro-Cardiovascular Health Engineering(COCHE) City University of Hong Kong Hong Kong SAR999077China Department of Chemical and biomedical Engineering The University of Maine OronoMaine04469USA University of New Brunswick Limerick Pulp & Paper CtrFrederictonNB E3B 5A3Canada

The demand for flexible electric heating devices has increased due to technology advancement and im-proved living *** devices have various applications including personal thermal management,hyperthermia,defrosting,agricultural heating film,and oil-water *** heat,generated by electric currents,is commonly used in electrical *** incorporate Joule heating into flexible electronics,new materials with excellent mechanical properties are *** polymers,used as reinforcements,limit the continuity of conductive networks in ***,there is a need to develop flexible Joule thermal composite materials with enhanced mechanical strength and ***,a widely available renewable resource,is attracting attention for its excellent mechanical *** can be used as a dispersant and reinforcing agent for conductive fillers in cellulose-based composites,creating highly conductive *** forms of cellulose,such as wood,nanocellu-lose,pulp fiber,bacterial cellulose,cellulose paper,textile clothing,and aramid fiber,have been utilized to achieve high-performance Joule thermal *** have achieved excellent mechanical properties and developed efficient electric heating devices by designing cellulose-based composites with different *** scalable production methods enable large-scale application of cellulose-based devices,each with unique advantages in 1D,2D,and 3D *** review summarizes recent ad-vancements in cellulose-based Joule thermal composites,providing insights into different structural de-vices,and discussing prospects and challenges in the field.

关键词： Cellulose Multidimensional Joule heating Design Preparation

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Historical, Contemporary, and Future Perspectives on Fuel Qualification

Historical, Contemporary, and Future Perspectives on Fuel Qu...

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2024 Annual Conference on Transactions of the American Nuclear Society, ANS 2024

作者： Mika, Mitch Aitkaliyeva, Assel University of Florida Department of Materials Science Nuclear Engineering Program GainesvilleFL United States

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Bioinspired Ultrasensitive Flexible Strain Sensors for Real‑Time Wireless Detection of Liquid Leakage

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Nano-Micro Letters 2025年第3期17卷 310-327页

作者： Weilong Zhou Yu Du Yingying Chen Congyuan Zhang Xiaowei Ning Heng Xie Ting Wu Jinlian Hu Jinping Qu Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationHubei Key Laboratory of Material Chemistry and Service Failure and Hubei Engineering Research Center for Biomaterials and Medical Protective MaterialsSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China School of Materials Science and Engineering Wuhan Institute of TechnologyWuhan 430205People’s Republic of China Department of Biomedical Engineering City University of Hong KongHong KongSAR 999077People’s Republic of China

Liquid leakage of pipeline networks not only results in considerableresource wastage but also leads to environmental pollution and ecological *** response to this global issue, a bioinspired superhydrophobic thermoplastic polyurethane/carbon nanotubes/graphene nanosheets flexible strain sensor (TCGS) hasbeen developed using a combination of micro-extrusion compression molding andsurface modification for real-time wireless detection of liquid leakage. The TCGSutilizes the synergistic effects of Archimedean spiral crack arrays and micropores,which are inspired by the remarkable sensory capabilities of scorpions. This designachieves a sensitivity of 218.13 at a strain of 2%, which is an increase of 4300%. Additionally, it demonstrates exceptional durability bywithstanding over 5000 usage cycles. The robust superhydrophobicity of the TCGS significantly enhances sensitivity and stability indetecting small-scale liquid leakage, enabling precise monitoring of liquid leakage across a wide range of sizes, velocities, and compositionswhile issuing prompt alerts. This provides critical early warnings for both industrial pipelines and potential liquid leakage scenariosin everyday life. The development and utilization of bioinspired ultrasensitive flexible strain sensors offer an innovative and effectivesolution for the early wireless detection of liquid leakage.

关键词： Thermoplastic polyurethane Bioinspired Cracks Liquid leakage Flexible strain sensor

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