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Piezoresistive MXene/Silk fibroin nanocomposite hydrogel for accelerating bone regeneration by Re-establishing electrical microenvironment

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Bioactive materials 2023年第4期22卷 1-17页

作者： Zhi-Chao Hu Jia-Qi Lu Tai-Wei Zhang Hai-Feng Liang Hao Yuan Di-Han Su Wang Ding Rui-Xian Lian Yu-Xiang Ge Bing Liang Jian Dong Xiao-Gang Zhou Li-Bo Jiang Department of Orthopaedic Surgery Zhongshan HospitalFudan UniversityShanghai200032China Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai UniversityShanghai200072China Department of Orthopedics Surgery Minhang HospitalFudan UniversityShanghai201100China Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic ChemistryResearch Center for Biomedical Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China Department of Orthopedic Surgery Zhongshan Hospital(Xiamen)Fudan UniversityXiamen361015China

The electrical microenvironment plays an important role in bone ***,the underlying mechanism by which electrical stimulation(ES)promotes bone regeneration remains unclear,limiting the design of bone microenvironment-specific electroactive ***,by simple co-incubation in aqueous suspensions at physiological temperatures,biocompatible regenerated silk fibroin(RSF)is found to assemble into nanofibrils with aβ-sheet structure on MXene nanosheets,which has been reported to inhibit the restacking and oxidation of *** electroactive hydrogel based on RSF and bioencapsulated MXene is thus prepared to promote efficient bone *** MXene/RSF hydrogel also acts as a piezoresistive pressure transducer,which can potentially be utilized to monitor the electrophysiological *** sequencing is performed to explore the underlying mechanisms,which can activate Ca^(2+)/CALM signaling in favor of the direct osteogenesis *** is found to facilitate indirect osteogenesis by promoting the polarization of M2 macrophages,as well as stimulating the neogenesis and migration of *** improvements in bone regeneration and angiogenesis are observed with MXene/RSF hydrogels under ES in ***,the MXene/RSF hydrogel provides a distinctive and promising strategy for promoting direct osteogenesis,regulating immune microenvironment and neovascularization under ES,leading to re-establish electrical microenvironment for bone regeneration.

关键词： Bone regeneration Electrical microenvironment Regenerated silk fibroin MXene Electrical stimulation

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An On-Chip Viscoelasticity Sensor for Biological Fluids

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Cyborg and Bionic Systems 2023年第1期4卷 540-548页

作者： Qianbin Zhao Sheng Yan Boran Zhang Kai Fan Jun Zhang Weihua Li Hebei Key Laboratory of Biomaterials and Smart Theranostics School of Health Sciences and Biomedical EngineeringHebei University of TechnologyTianjin 300131China Institute for Advanced Study Shenzhen UniversityShenzhen 518060China School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore 639798Singapore Department of Precision Machinery and Precision Instrumentation University of Science and Technology of ChinaHefei 230026China Queensland Micro and Nanotechnology Centre Griffith UniversityBrisbaneQLD 4111Australia School of Mechanical MaterialsMechatronic and Biomedical EngineeringUniversity of WollongongWollongongNSW 2522Australia

There are so many non-Newtonian fluids in our daily life,such as milk,blood,cytoplasm,and mucus,most of which are viscoelastic heterogeneous liquid containing cells,inorganic ion,metabolites,and *** microfluidic microparticle-manipulating applications,the target particles are practically distributed within the biological fluids like blood and *** viscoelasticity of biological fluid is constantly ignored for simplicity especially when the fluid is substantially diluted and contains rather complex ***,even the fluid’s ultraweak viscoelasticity actually affects the microparticle migration and may bring a completely different behavior compared with the Newtonian *** a result,a robust and easy operated on-chip viscoelasticity sensor is potential and desired in many research and industrial fields,including assay sample preparation,clinical diagnostics,and on-chip *** this work,we employed stable non-Newtonian fluid-polyethylene oxide(PEO)solutions with various concentrations to investigate and calibrate effects of the weak fluidic viscoelasticity on microparticle behaviors in a double-layered microfluidic *** analogy-based database of fluidic patterns for viscoelasticity sensing and relaxation time measurement was ***,we tested different biological fluids including blood plasma and fetal bovine serum and proved that they exhibited similar viscoelasticity effects to the PEO solutions with the corresponding concentration,which reached a good agreement with available results by *** detection limitation of relaxation time can reach 1 *** promised a robust and integrated on-chip microfluidic viscoelasticity sensor for different biological fluids without complicated calculations.

关键词： Newtonian relaxation analogy

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Fabrication and evaluation of controlled release of doxorubicin loaded UiO-66-NH2 metal organic frameworks

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International Journal of engineering, Transactions B: Applications 2021年第8期34卷 1874-1881页

作者： Rakhshani, N. Nemati, N. Hassanzadeh Saadatabadi, A. Ramazani Sadrnezhaad, S.K. Department of Biomedical Engineering Science and Research Branch Islamic Azad University Tehran Iran Department of Chemical and Petroleum Engineering Sharif University of Technology Tehran Iran Department of Materials Science and Engineering Sharif University of Technology Tehran Iran

The metal-organic frameworks (MOFs) due to their large specific surface area and high biocompatibility are suitable as carriers for drug delivery systems (DDSs). In the present study, doxorubicin (DOX) as an anticancer drug was loaded into UiO-66-NH2 MOFs to decrease the adverse side effects of pristine DOX use and to increase its efficiency through the controlled release of DOX from MOFs. The MOFs were synthesized via microwave heating method and characterized using X-ray diffraction, scanning electron microscopy, and Brunauer-Emmett- Teller analysis. The drug loading efficiency, drug release profiles from synthesized MOFs and pharmacokinetic studies were investigated. The biocompatibility of drug-loaded-UiO-66-NH2 MOFs was also evaluated by their incubation in L929 normal fibroblast cells. The average particle sizes of UiO-66-NH2 MOFs and DOX loaded-MOFs were found to be 175 nm, and 200 nm respectively. The Brunauer-Emmett- Teller surface area of UiO-66-NH2 MOFs and DOX (100 μg mL-1) loaded-UiO-66-NH2 MOFs were estimated to be 1052 m2g-1, and 121 m2g-1, respectively. The synthesized MOFs exhibited high capability for the controlled release of DOX from MOFs as a pH sensitive carrier. The DOX release data were best described using Korsmeyer-Peppas pharmacokinetic model (R2≥0.985). The cell viability of synthesized MOFs against fibroblast normal cells was found to be higher than 90%. It could be concluded that the UiO-66-NH2 MOFs could be used as an effective pH sensitive carrier for loading anticancer drugs. © 2021 materials and Energy Research Center. All rights reserved.

关键词： Biocompatibility

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Graphene-functionalized textile composites for wearable Joule heating applications

Advanced Nanocomposites

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Advanced Nanocomposites 2025年 2卷 108-123页

作者： Omar Faruk Abbas Ahmed Ashfaqul Hoque Khadem Lu Jia Luyi Sun Department of Materials Science and Engineering Binghamton University State University of New York at Binghamton NY 13902 USA Polymer Program Institute of Materials Science and Department of Chemical & Biomolecular Engineering University of Connecticut Storrs CT 06269 USA Department Mechanical Engineering College of Engineering Computing and Applied Science Clemson University Clemson SC 29634 USA College of Textile Engineering Taiyuan University of Technology Jinzhong Shanxi 030600 China

Thermal comfort is essential for maintaining physiological well-being, with textile materials traditionally serving as the primary medium for regulating heat exchange between the body and its environment. However, conventional textiles often fall short of maintaining optimal thermal balance. So, there is an increasing demand for advanced thermoregulation systems that can effectively reduce heat loss and enhance warmth, ensuring consistent comfort. Recent research has highlighted the promise of advanced functional materials, especially graphene and its composites, for modifying textiles to improve thermal properties. This article comprehensively reviews recent advancements in graphene-functionalized textile composites, focusing on their applications in wearable Joule heaters designed for personalized thermal comfort or thermal therapy. Various graphene-functionalized textile composites are reviewed from the perspectives of material properties, processing strategies and device fabrication methods. Key challenges and future opportunities are summarized for graphene-functionalized textile-based Joule heaters as innovative solutions in wearable thermal regulation.

关键词： Graphene Textile Composite Wearable electronics Joule heater

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Recent Research Progress of Paper-Based Supercapacitors Based on Cellulose

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Energy & Environmental materials 2024年第3期7卷 345-373页

作者： Chuanyin Xiong Tianxu Wang Jing Han zhao Zhang 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 Department of Chemical and Biomedical Engineering The University of MaineOronoMaine 04469USA University of New Brunswick Limerick Pulp&Paper CtrFredericton New Brunswick E3B 5A3Canada

In recent years,paper-based functional materials have received extensive attention in the field of energy storage due to their advantages of rich and adjustable porous network structure and good *** an important energy storage device,paper-based supercapacitors have important application prospects in many fields and have also received extensive attention from researchers in recent *** present,researchers have modified and regulated paper-based materials by different means such as structural design and material composition to enhance their electrochemical storage *** development of paper-based supercapacitors provides an important direction for the development of green and sustainable ***,it is of great significance to summarize the relevant work of paper-based supercapacitors for their rapid development and *** this review,the recent research progress of paper-based supercapacitors based on cellulose was summarized in terms of various cellulose-based composites,preparation skills,and electrochemical ***,some opinions on the problems in the development of this field and the future development trend were *** is hoped that this review can provide valuable references and ideas for the rapid development of paper-based energy storage devices.

关键词： cellulose electrochemical performance flexibility paper-based supercapacitor porous

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Micromolded honeycomb scaffold design to support the generation of a bilayered RPE and photoreceptor cell construct

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Bioactive materials 2023年第12期30卷 142-153页

作者： In-Kyu Lee Ruosen Xie Agustin Luz-Madrigal Seunghwan Min Jingcheng Zhu Jiahe Jin Kimberly L.Edwards M.Joseph Phillips Allison L.Ludwig David M.Gamm Shaoqin Gong Zhenqiang Ma Department of Electrical and Computer Engineering University of Wisconsin-MadisonMadisonWI53706USA Wisconsin Institute for Discovery University of Wisconsin-MadisonMadisonWI53715USA Department of Ophthalmology and Visual Sciences University of Wisconsin-MadisonMadisonWI53705USA Department of Biomedical Engineering University of Wisconsin-MadisonMadisonWI53706USA McPherson Eye Research Institute University of Wisconsin-MadisonMadisonWI53705USA Waisman Center University of Wisconsin-MadisonMadisonWI53705USA Department of Comparative Biomedical Sciences University of Wisconsin–MadisonMadisonWI53706USA Department of Materials Science and Engineering University of Wisconsin-MadisonMadisonWI53706USA Department of Engineering Physics University of Wisconsin-MadisonMadisonWI53706USA Grainger Institute for Engineering University of Wisconsin-MadisonMadisonWI53706USA

Age-related macular degeneration(AMD)causes blindness due to loss of retinal pigment epithelium(RPE)and photoreceptors(PRs),which comprise the two outermost layers of the *** the small size of the macula and the importance of direct contact between RPE and PRs,the use of scaffolds for targeted reconstruction of the outer retina in later stage AMD and other macular dystrophies is particularly *** developed microfabricated,honeycomb-patterned,biodegradable poly(glycerol sebacate)(PGS)scaffolds to deliver organized,adjacent layers of RPE and PRs to the subretinal ***,an optimized process was developed to photocure PGS,shortening scaffold production time from days to *** resulting scaffolds robustly supported the seeding of human pluripotent stem cell-derived RPE and PRs,either separately or as a dual celllayered *** advanced,economical,and versatile scaffolds can accelerate retinal cell transplantation efforts and benefit patients with AMD and other retinal degenerative diseases.

关键词： Microfabrication Retina Scaffolds Stem cells Tissue engineering

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Internal moisture barrier layer for improving high-humidity reliability of miniature light emitting diode die without encapsulation

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Optics Express 2023年第20期31卷 33732-33740页

作者： Hsu, Chia-Hsun Luo, Hai-Long Li, Shi-Tao Bian, Fu-Qiang Chen, Ya-Zhen Peng, G.A.O. Wu, Wan-Yu Wuu, Dong-Sing Lai, Feng-Min Lien, Shui-Yang Zhu, Wen-Zhang Xiamen Key Laboratory of Development Application for Advanced Semiconductor CoatingTechnology School of Opto-Electronic and Communication Engineering Xiamen University of Technology Fujian Xiamen361024 China Xiamen Silan Advanced Compound Semiconductor Co. Ltd. Fujian Xiamen361026 China Fujian Institute of Research the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China Department of Materials Science and Engineering National United University Miaoli36063 Taiwan Department of Applied Materials and Optoelectronic Engineering National Chi Nan University Nantou54561 Taiwan Department of Biomedical Engineering Da-Yeh University Changhua51591 Taiwan

Atomic layer deposited Al2O3 films are incorporated into miniature light emitting diodes (mini-LEDs) as an internal moisture barrier layer. The experimental results show that the water vapor transmission rate reaches ≤10−4 g/m2/day when the Al2O3 thickness is ≥40 nm. The mini-LED with a 40 nm-thick Al2O3 layer shows negligible degradation after 1000 h of 85°C/85% relative humidity testing, whereas the device without an Al2O3 layer fails after only 500 h due to delamination occurring at the GaN surface. Current-voltage characteristics of the device without an Al2O3 moisture barrier layer indicate an increase in series resistance and ideality factor. This study provides a simple, light-weighting method to have a satisfactory encapsulation function for miniature LEDs. © 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： III-V semiconductors

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Electrochemical behavior of open-cellular structured Ti-6Al-4V alloy fabricated by electron beam melting in simulated physiological fluid:the significance of pore characteristics

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Journal of materials science & Technology 2022年第2期97卷 272-282页

作者： Xin Gai Rui Liu Yun Bai Shujun Li Yang Yang Shenru Wang Jianguo Zhang Wentao Hou Yulin Hao Xing Zhang Rui Yang R.D.K.Misra Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Department of Orthopedic Surgery Peking Union Medical College Hospital(PUMCH)Peking Union Medical College and Chinese Academy of Medical SciencesBeijing 100730China Department of Metallurgical Materialsand Biomedical EngineeringThe University of Texas at El Paso500W.University AvenueEl PasoTX 79968United States

The cellular structured titanium alloys have attracted significant attention for implants because of their lower Young’s modulus,which is comparable to human bone and has the capability of providing space for bone tissue ***,there is a gap in the knowledge in regard to the relationship between the pore characteristics and the electrochemical performance of open-cellular structured titanium *** this study,we elucidate the influence of pore characteristics on the electrochemical performance of open-cellular structured Ti-6Al-4V alloys produced by electron beam melting(EBM).Intriguingly,the passive film formed on cellular structured Ti-6Al-4V alloy with a larger pore size was more stable and protective,and the corrosion performance was superior compared to the samples with a smaller pore size in phosphate buffered saline(PBS),mainly because of relatively smaller exposed surface area and unlimited flow of ***,in acidic PBS containing fluoride ions,the pore characteristics did not play an important role in the corrosion *** was considered that the protective film breaks down such that the corrosion performance of cellular structured alloys was comparable to each other in this harsh environment.

关键词： Cellular structure Ti-6Al-4V Electron beam melting Corrosion resistance Fluoride ion

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Superhydrophobic fluoride conversion coating on bioresorbable magnesium alloy——fabrication,characterization,degradation and cytocompatibility with BMSCs

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Journal of Magnesium and Alloys 2021年第4期9卷 1252-1266页

作者： Chunyan Zhanga Shiyu Zhang Dongwei Sun Jiajia Lin Fancheng Meng Huinan Liu School of Materials Science&Engineering Chongqing University of TechnologyNo.69 Hongguang AvenueChongqing 400054China Department of Bioengineering and the Materials Science and Engineering ProgramUniversity of CaliforniaRiverside900 University AvenueMSE 205RiversideCA 92521USA

A micro-nano structure CaF_(2)chemical conversion layer was prepared on fluoride-treated AZ31 alloy,then the composite fluoride conversion film(CaF_(2)/MgF_(2))was modified by stearic acid(SA)and fabricated a superhydrophobic *** fluoride-treated magnesium,fluoride conversion film and superhydrophobic coating were characterized by SEM,EDS,XRD and *** properties of coatings1 adhesion and corrosion resistance were evaluated via tape test and electrochemical *** cytocompatibility of the MgF_(2),CaF_(2)and superhydrophobic CaF_(2)/SA surface was investigated with bone marrow-derived mesenchymal stem cells(BMSCs)by direct culture for 24 *** results showed that the superhydrophobic fluoride conversion coating composed of inner MgF_(2)layer and the outer CaF_(2)/SA composite layer had an average water contact angle of 152°.SA infiltrated into the micro-nano structure CaF_(2)layer and formed a strong adhesion with CaF_(2)***,the super-hydrophobic coating showed higher barrier properties and corrosion resistance compared with the fluoride conversion film and fluoride-treated AZ31 *** BMSC adhesion test results demonstrated MgF_(2)CaF_(2)and CaF_(2)/SA coatings were all nontoxic to *** the condition of in direct contact with cells,MgF_(2)showed higher cell density and enhanced the BMSCs proliferation,while CaF_(2)and CaF_(2)/SA coating showed no statistically difference in cell density compared with glass reference but the CaF_(2)and CaF_(2)/SA coating were not conducive to BMSCs adhesion.

关键词： Biodegradable Magnesium alloy Superhydrophobic Fluoride conversion film Cytocompatibility

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Low-cost chemical surface smoothing of CO2 laser-etched acrylic using WELD ON 4 acrylic solvent cement

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International Journal of Advanced Manufacturing Technology 2025年第5期138卷 2245-2255页

作者： Moncada, Luis H. Safaripour, Samira Hutter, Tanya Walker Department of Mechanical Engineering The University of Texas at Austin AustinTX78712 United States Materials Science and Engineering Program and Texas Materials Institute The University of Texas at Austin AustinTX78712 United States

With the increasing use of micro-manufactured devices and the demand for low-cost fabrication techniques, this study presents a simple and scalable surface polishing method for laser etched acrylic using WELD-ON 4 acrylic solvent cement, a solvent typically used for bonding thermoplastics. The method’s effectiveness was evaluated by treating acrylic samples up to three times and analyzing changes in transparency, surface roughness average (Ra), luminescence, and wettability. Results show that even a single treatment significantly improved surface smoothness, reduced light scattering, and brought contact angle and optical clarity closer to those of unetched acrylic. After three treatments, the surface became isotropic, with laser-etched lines disappearing. Specifically, a 60% reduction in Ra was observed in the direction perpendicular to the etched lines, while the parallel direction initially showed a similar trend, followed by a slight increase attributed to the formation of surface irregularities caused by the re-solidification of dissolved acrylic. Contact angle measurements indicated that the surface remained hydrophilic, with controllable wettability based on the number of treatments. Overall, this method provides a low-cost, cleanroom-free solution for improving the surface finish of laser-fabricated acrylic components. Its compatibility with complex or recessed geometries makes it particularly suitable for microfluidic devices and other precision applications requiring both optical clarity and controlled surface properties. © The Author(s), under exclusive licence to Springer-Verlag London Ltd., part of Springer Nature 2025.

关键词： Carbon dioxide lasers

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