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SSRN 2020年

作者： Hu, Nan Wu, Yuzheng Xie, Lingxia Yusuf, Shahir Mohd Gao, Nong Starink, Marco J. Tong, Liping Chu, Paul K. Wang, Huaiyu Institute of Biomedicine and Biotechnology Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen518055 China Engineering Materials group University of Southampton SouthamptonSO17 1BJ United Kingdom Department of Physics Department of Materials Science and Engineering Department of Biomedical Engineering City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong

The poor adhesion of anodic TiO2 nanotubes (TNTs) arrays on Ti substrates adversely affects applications in many fields especially biomedical engineering. Herein, we describe an efficient strategy to improve the adhesion strength of TNTs by performing grain refinement in the underlying Ti substrate via high-pressure torsion processing, as a larger number of grain boundaries can provide more interfacial mechanical anchorage. This process also improves the biocompatibility and osseointegration of TNTs by increasing the surface elastic modulus. The TNTs in length of 0.4 μm have significantly larger adhesion strength than the 2.0 μm long ones because the shorter TNTs experience less interfacial internal stress. However, post-anodization annealing reduces the F concentration in TNTs and adhesion strength due to the formation of interfacial cavities during crystallization. The interfacial structure of TNTs/Ti system and the mechanism of adhesion failures are further investigated and discussed. © 2020, The Authors. All rights reserved.

关键词： Torsional stress

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Insights about defects in rare earth-doped Sr 4 Al 14 O 25 via a classical computational modelling approach

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Physica B: Condensed Matter 2025年 714卷

作者： Giordano Frederico da Cunha Bispo Adriano Borges Andrade Eduily Benvindo Vaz Freire Anderson Lira de Sales Santos Zélia Soares Macedo Marcos Vinicius dos Santos Rezende Mário Ernesto Giroldo Valerio Postgraduate Program in Materials Science and Engineering (P2CEM) Federal University of Sergipe 49107-230 São Cristovão SE Brazil Physics Department Federal University of Sergipe 49107-230 São Cristovão SE Brazil Postgraduate Program in Physics Campus Ministro Petrônio Portella Federal University of Piauí Teresina PI Brazil

Strontium aluminates doped and co-doped with rare earth ions (RE 3+ and RE 2+ ) have been extensively explored for their long-lasting afterglow properties. This study investigates the potential defects created by these dopants via classical computational modelling. In the first part, isovalent and aliovalent substitutions of RE 3+ were analysed, along with the resulting lattice strain caused by doping. The results showed that interstitial oxygen is the most energetically favourable charge compensation mechanism, except for Lu 3+ , Yb 3+ , Tm 3+ , and Er 3+ , which prefer isovalent substitution at the Al 3+ sites. The second part of the study examined possible mechanisms for RE 3+ → RE 2+ reduction, a key aspect that governs the long-lasting afterglow processes. Divalent ions exhibited a high possibility of reduction in the presence of CO which is consistent with experimental data on luminescent properties. Finally, the study focused on codoping systems with Eu 2+ and Dy 3+ , testing various reduction atmospheres and charge compensation mechanisms.

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Pro-angiogenic functionalized hyaluronic acid-based hydrogel encapsulating metformin coordinates in situ immune-inflammatory modulation for accelerating diabetic wound healing

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International Journal of Biological Macromolecules 2025年 318卷 144944页

作者： Li, Zhen Guan, Shiyao Duan, Xiao Wang, Liying Zhang, Zhen Wu, Jun Changzhi Key Laboratory of Drug Molecular Design and Innovative Pharmaceutics Shanxi Provincial Shangdang Chinese Medicinal Materials School of Pharmacy Changzhi Medical College Department-Municipal Key Laboratory Cultivation Base for Quality Enhancement and Utilization of Changzhi Changzhi 046000 China School of Biomedical Engineering Sun Yat-sen University Guangdong Guangzhou 510006 China Bioscience and Biomedical Engineering Thrust The Hong Kong University of Science and Technology (Guangzhou) Nansha Guangzhou 511400 China Department of Hematology The Seventh Affiliated Hospital Sun Yat-sen University Shenzhen 518107 China Division of Life Science The Hong Kong University of Science and Technology 999077 Hong Kong

Diabetic wounds present significant challenges due to persistent inflammation and impaired angiogenesis, often resulting in delayed healing or, in severe cases, amputation. Hence, there is an urgent need for innovative wound dressings tailored to the specific needs of diabetic wounds. Deferoxamine (DFO) and metformin (Met) offer promising properties for promoting angiogenesis and modulating the immune-inflammatory response, respectively, but their burst release limits their further application in wound management. Based on this, we developed a novel multifunctional diabetic wound dressing composed of DFO-grafted hyaluronic acid methacrylate (HAMA) hydrogel loaded with Met (Met/DMA hydrogel). In vitro studies demonstrated that the Met/DMA hydrogel enhances fibroblast proliferation and migration, reduces intracellular reactive oxygen species, and accelerates endothelial cell angiogenesis and macrophage polarization to an anti-inflammatory phenotype. Animal experiments further revealed that the hydrogel significantly accelerated wound healing in diabetic rats (41.6±8.7 % improvement vs. control group) by promoting neovascularization, collagen maturation, and regulation of the inflammatory microenvironment at the wound site. In conclusion, this study successfully developed a Met/DMA hydrogel platform that effectively treats diabetic wounds through synergistic promotion of angiogenesis and modulation of the immune-inflammatory response. © 2025

关键词： Angiogenesis Anti-inflammatory DFO Diabetic wounds healing Met

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Correction: Cytocompatible, soft and thick brush-modified scaffolds with prolonged antibacterial effect to mitigate wound infections

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Biomaterials science 2022年第16期10卷 4667页

作者： Shaifali Dhingra Vidit Gaur Varsha Saini Kajal Rana Jayanta Bhattacharya Thomas Loho Sudip Ray Avinash Bajaj Sampa Saha Department of Materials Science and Engineering Indian Institute of Technology Delhi India. ssaha@mse.iitd.ac.in. Centre for Biomedical Engineering Indian Institute of Technology Delhi India. Laboratory of Nanotechnology and Chemical Biology Regional Centre For Biotechnology India. Department of Chemical and Materials Engineering The University of Auckland New Zealand. New Zealand Institute for Minerals to Materials Research New Zealand.

Correction for 'Cytocompatible, soft and thick brush-modified scaffolds with prolonged antibacterial effect to mitigate wound infections' by Shaifali Dhingra , , 2022, , 3856-3877, https://***/10.1039/d2bm00245k.

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3D Crumpled Ultrathin 1T MoS2 for Inkjet Printing of Mg-Ion Asymmetric Micro-supercapacitors (vol 14, pg 7308, 2020)

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ACS NANO 2020年第10期14卷 14247-14247页

作者： Shao, Yuanlong Fu, Jui-Han Cao, Zhen Song, Kepeng Sun, Ruofan Wan, Yi Shamim, Atif Cavallo, Luigi Han, Yu Kaner, Richard B. Tung, Vincent C. College of Energy Soochow Institute for Energy and Materials Innovations (SIEMIS) Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow University Suzhou 215006 People’s Republic of China Physical Science and Engineering (PSE) Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Electrical Engineering Program Computer Electrical and Mathematical Sciences (CEMS) Division KAUST Thuwal 23955-6900 Saudi Arabia Department of Chemistry and Biochemistry Department of Materials Science and Engineering California NanoSystems Institute (CNSI) University of California Los Angeles Los Angeles California 90095 United States

Metallic molybdenum disulfide (MoS2),e.g., 1T phase, is touted as a highly promising material for energy storage that already displays a great capacitive performance. However, due to its tendency to aggregate and restack, it remains a formidable challenge to assemble a high-performance electrode without scrambling the intrinsic structure. Here, we report an electrohydrodynamic-assisted fabrication of 3D crumpled MoS2(c-MoS2) and its formation of an additive-free stable ink for scalable inkjet printing. The 3D c-MoS2powders exhibited a high concentration of metallic 1T phase and an ultrathin structure. The aggregation-resistant properties of the 3D crumpled particles endow the electrodes with open space for electrolyte ion transport. Importantly, we experimentally discovered and theoretically validated that 3D 1T c-MoS2enables an extended electrochemical stable working potential range and enhanced capacitive performance in a bivalent magnesium-ion aqueous electrolyte. With reduced graphene oxide (rGO) as the positive electrode material, we inkjet-printed 96 rigid asymmetric micro-supercapacitors (AMSCs) on a 4-in. Si/SiO2wafer and 100 flexible AMSCs on photo paper. These AMSCs exhibited a wide stable working voltage of 1.75 V and excellent capacitance retention of 96% over 20 000 cycles for a single device. Our work highlights the promise of 3D layered materials as well-dispersed functional materials for large-scale printed flexible energy storage devices.

关键词： Electrical properties Electrodes Energy density Inkjet printing Electrolytes

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Discovery of a reversible redox-induced order-disorder transition in a 10-cation compositionally complex ceramic

arXiv

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arXiv 2021年

作者： Zhang, Dawei Chen, Yan Feng, Tianshi Yu, Dunji An, Ke Chen, Renkun Luo, Jian Program of Materials Science and Engineering University of California San Diego La Jolla CA92093 United States Neutron Scattering Division Oak Ridge National Laboratory Oak RidgeTN38731 United States Department of Mechanical & Aerospace Engineering University of California San Diego La Jolla CA92093 United States Department of NanoEngineering University of California San Diego La Jolla CA92093 United States

This study discovers a reversible order-disorder transition (ODT) in a 10-cation compositionally complex ceramic, (Nd0.15Pr0.15Dy0.8Ho0.8Er0.8Ti0.2Yb0.1Hf0.1Zr0.1Nb0.8)O7-δ, induced via annealing in oxidized vs. reduced environments at 1600οC. Notably, the 10-cation oxide remains a homogenous single-phase high-entropy solid solution before and after the ODT in the pyrochlore vs. fluorite structure that can be quenched. In-situ neutron diffraction reveals the oxygen vacancy formation and atomic displacement during this ODT. The temperature dependence of thermal conductivity is altered by the ODT. This study reveals a new pathway to induce ODT via a redox transition to tailor the properties of compositionally complex fluorite-based oxides. © 2021, CC BY.

关键词： Entropy

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Revisiting ligand-exchange chromatography for valsartan chiral analysis using a conventional non-chiral column

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Journal of Pharmaceutical sciences 2025年第7期114卷 103797页

作者： Tho, Chanbopha Kerwin, Sean M. Jamnongtanachot, Promporn Vongsutilers, Vorasit Tuesuwan, Bodin Pharmaceutical Sciences and Technology Program Faculty of Pharmaceutical Sciences Chulalongkorn University Bangkok 10330 Thailand Department of Food and Pharmaceutical Chemistry Faculty of Pharmaceutical Sciences Chulalongkorn University Bangkok 10330 Thailand Materials Science Engineering and Commercialization Program Texas State University San Marcos 78666 TX United States Visatchana Consulting Co. Ltd. Bangkok 10230 Thailand

As the chiral drug market grows, developing efficient separation methods while ensuring quality has become a key focus for the pharmaceutical industries. Chiral column chromatography is effective but often impractical due to its expense. In our research, we established a cost-effective chiral analysis method for valsartan using ligand-exchange chromatography (LEC), an underutilized yet promising analytical technique with significant potential for further development in pharmaceutical research. This approach allows separation on a non-chiral column by forming complexes with metal ions in the mobile phase. Valsartan, a widely used antihypertensive drug, and its enantiomeric impurity were analyzed through LEC on a C₁₈ column. We optimized the conditions for chiral selectors, copper ions, and pH, achieving a resolution exceeding 2.7. The method, validated per ICH Q2(R1) guidelines for assay and impurity determination, exhibited outstanding linearity (r² > 0.999) and recovery (97.8 %–101.7 %), ensuring a complete separation of the target peak, even after forced degradation. LEC presents a cost-effective alternative for in-house chiral drug analysis, addressing the challenges posed by limited access to chiral columns in countries focused on local generic drug production, and offering a practical solution to the increasing global demand for efficient chiral separation. © 2025 American Pharmacists Association

关键词： Analytical Chemistry Chromatography HPLC Liquid Chromatography (LC) United States Pharmacopeia (USP)

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Parametric process optimization to improve the accuracy and mechanical properties of 3D printed parts

Parametric process optimization to improve the accuracy and ...

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作者： Hakamivala, Amirhossein Nojoomi, Amirali Aminian, Alieh Farzadi, Arghavan Abu Osman, Noor Azuan Department of Bioengineering University of Texas at Arlington ArlingtonTX United States Department of Materials Science and Engineering University of Texas at Arlington ArlingtonTX United States BEGO Implant Systems GmbH and Co. KG Department of Research and Development Bremen Germany Department of Biomedical Engineering Ohio State University ColumbusOH United States Department of Biomedical Engineering University of Malaya Kuala Lumpur Malaysia

Investigating the mechanical properties and dimensional accuracy of 3D printed parts is an important step towards achieving optimum printing conditions. This condition, which leads to the fabrication of parts with appropriate mechanical properties and accuracy, is achieved by studying the effect of different process parameters on the final structure. In this work, Response Surface Methodology (RSM) was employed to design specified experiments to investigate the effects of layer thickness, printing orientation and delay, on the compressive strength and dimensional error of the parts. The results show that an increase in the delay time in X orientation results in better binder spreading and uniformity followed by improvement in the compression strength. Furthermore, more binder spreads in the vertical direction leads to the higher dimensional error in the Z direction. The results proved that the RSM provides a time and cost-efficient design to print the prototypes with optimum strength and dimensional error. © materials Research Society 2018.

关键词： 3D printers

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Characterization of a Soft Gripper with Detachable Fingers through Rapid Evaporation

Characterization of a Soft Gripper with Detachable Fingers t...

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IEEE International Conference on Soft Robotics (RoboSoft)

作者： Han-Joo Lee Noe Melchor Hayoung Chung Kenneth J. Loh Materials Science and Engineering Program University of California San Diego La Jolla CA USA Department of Mechanical and Aerospace Engineering University of California San Diego La Jolla CA USA Department of Structural Engineering University of California San Diego La Jolla CA USA

ISBN: (数字)9781728165707

ISBN: (纸本)9781728165714

One way biological creatures exploit their soft tissues and muscles is to quickly adjust to their environments in a flexible manner. Artificial soft material actuators have been inspired by these complex motions and studied to mimic or even exceed these biological systems. A widely adopted soft actuation method is by controlling pressure changes inside a hollow structure through the use of pneumatic systems, where inflating the structure would cause it to deform in different directions depending on its geometrical design. Instead, this work investigated actuation by vaporizing embedded liquid in a soft structure. In particular, ultrasonic waves can be directed to excite the structure that is partially filled with a small amount of ethanol, whereby atomization ejects small droplets of vaporized ethanol into the chamber to inflate the overall structure. As compared to boiling, evaporation by ultrasonic atomization is much faster and occurs at a lower temperature. Furthermore, tethered tubes are unnecessary, since ultrasonic waves can propagate through the structure. Here, soft actuation through ultrasonic atomization was analyzed by comparing the results from both experiments and numerical models. In addition, a soft robotic gripper was designed and fabricated to hold onto various objects.

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Corrigendum to "Development of a portable SERS tool to evaluate the effectiveness of washing methods to remove pesticide residue from fruit surface" [Anal. Chim. Acta, 1336 (2025) 343476]

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Analytica chimica acta 2025年 1341卷 343627页

作者： Lydia Freund Jacqueline Mossa Huiyuan Guo Department of Chemistry State University of New York at Binghamton Binghamton NY 13902 USA. Department of Chemistry State University of New York at Binghamton Binghamton NY 13902 USA Materials Engineering and Science Program State University of New York at Binghamton Binghamton NY 13902 USA. Electronic address: hguo@binghamton.edu.

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