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152nd Annual Meeting and Exhibition of The Minerals, Metals and materials Society, TMS 2023

作者： Tavangarian, Fariborz Gray, Jennifer L. Clark, Trevor Gao, Chao Mechanical Engineering Program School of Science Engineering and Technology Pennsylvania State University Harrisburg MiddletownPA17057 United States Materials Research Institute The Pennsylvania State University University Park PA16802 United States Department of Mechanical and Industrial Engineering Norwegian University of Science and Technology Trondheim7034 Norway

ISBN: (纸本)9783031225239

Nature has been a great source of inspiration for engineers and scientists for centuries. It provides unique ideas to overcome the unmet needs of human beings. Spicules are structural elements of Euplectella Aspergillum sponges that reside in the deep ocean. They have an exceptional microstructure that provides excellent mechanical properties. Although spicules are composed of a brittle material, silica (SiO2), they behave differently under load compared to other ceramics. This behavior is due to their concentric cylindrical structure. To produce a similar structure with potential engineering and biomedical applications, one needs to investigate its microstructure in depth. In this study, we examined the microstructure of spicules to understand their architecture as a foundation to better design biomedical implants for tissue engineering applications. © 2023, The Minerals, Metals & materials Society.

关键词： Microstructure

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The enhanced photocatalytic sterilization of MOF-Based nanohybrid for rapid and portable therapy of bacteria-infected open wounds

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Bioactive materials 2022年第7期7卷 200-211页

作者： Chaofeng Wang Yue Luo Xiangmei Liu Zhenduo Cui Yufeng Zheng Yanqin Liang Zhaoyang Li Shengli Zhu Jie Lei Xiaobo Feng Shuilin Wu Biomedical Materials Engineering Research Center Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and MinistryHubei Key Laboratory of Polymer MaterialsMinistry-of-Education Key Laboratory for the Green Preparation and Application of Functional MaterialsSchool of Materials Science&EngineeringHubei UniversityWuhan 430062China School of Life Science and Health Engineering Hebei University of TechnologyXiping Avenue 5340Beichen DistrictTianjin 300401China School of Materials Science&Engineering The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of ChinaTianjin UniversityTianjin 300072PR China School of Materials Science&Engineering State Key Laboratory for Turbulence and Complex SystemPeking UniversityBeijing 100871China Department of Orthopaedics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022PR China

Open wounds are prone to infection and difficult to heal,which even threatens the life of patients because bacterial infections can induce other lethal complications without prompt *** commonly used antibiotics treatment for bacterial infections has been reported to cause globally bacterial resistance and even the occurrence of *** highly effective and antibiotic-independent therapeutic strategies are urgently needed for treating various kinds of bacteria-infected *** this work,we synthesized an eco-friendly nanohybrid material(ZnDMZ)consisting of a kind of biodegradable metal organic framework(MOF,ZIF-8)combined with Zn-doped MoS_(2)(Zn-MoS_(2))nanosheets,which exhibited great ability to kill bacteria and promote the healing of bacteria-infected wounds under 660 nm light *** underlying mechanism is that besides the local hyperthermia,the nanohybrid material exhibits enhanced photocatalytic performance than single component in it,i.e.,it can also be excited by 660 nm light to produce more oxygen radical species(ROS)due to the following *** one hand,the Zn doping can reduce the work function and the band gap of MoS_(2),which promotes the movement of photoexcited electrons to the surface of the *** the other hand,the combination between Zn-MoS_(2) and MOF induces the formation of a built-in electric field due to their work function difference,thus accelerating the separation of photoexcited electron-hole *** of the synergy of photocatalytic effect,photothermal effect and the released Zn ions,the synthesized ZnDMZ possessed a highly effective antibacterial efficacy of 99.9%against Staphylococcus aureus under 660 nm light irradiation for 20 min without *** vivo tests showed that this nanohybrid material promoted the wound healing due to the released Zn *** nanohybrid will be promising for rapid and portable treatment of bacteria-infected open wounds in pathogenic bacteria contaminated

关键词： Antibacterial Wound healing Bacterial infection MOF Photocatalytic

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Scalable Arrays of Pneumatic Sensors for Multitouch Soft Skins

Scalable Arrays of Pneumatic Sensors for Multitouch Soft Ski...

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IEEE International Conference on Soft Robotics (RoboSoft)

作者： Xiaoran Zha Saurabh Jadhav Iman Adibnazari Yichen Zhai Michael T. Tolley Mechanical and Aerospace Engineering Department Materials Science and Engineering Program University of California San Diego San Diego CA USA

Soft robotic systems necessitate accurate and reliable sensor readings to detect environmental interactions and provide precise feedback for control. To be effective, soft sensors must exhibit sensitivity, reliability, repeatability, and flexibility. A versatile approach to sensing for soft robots uses soft air-filled deformable structures with pressure transducers to detect pressure changes due to applied forces. However, the common approach of employing one pressure transducer per sensing chamber limits the scalability of this sensing approach (e.g., for large arrays able to detect touch at many locations). Here we present an approach to the design of pneumatic sensor arrays that reduces the number of required transducers. We develop mathematical models to analyze the pressure variations within the sensor arrays in response to applied forces at various locations. We also introduce a method of rapidly fabricating sensor arrays by laminating elastomeric sheets patterned with laser-cut sacrificial layers. We then use our model to optimize the geometry of the sensors and evaluate the results experimentally. Finally, we devise an algorithm capable of determining the location of multiple touches anywhere within the sensor array. This work represents a step towards the practical application of soft pneumatic sensors, particularly for robotic sensing and haptic devices, enhancing the safety of human-robot interactions.

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biomedical rare-earth magnesium alloy:Current status and future prospects

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Journal of Magnesium and Alloys 2024年第4期12卷 1260-1282页

作者： Mingli Yang Cheng Chen Dongsheng Wang Yinjin Shao Wenhao Zhou Cijun Shuai Youwen Yang Xinghai Ning Institute of Additive Manufacturing Jiangxi University of Science and TechnologyNanchang 330013China Key Laboratory of Construction Hydraulic Robots of Anhui Higher Education Institutes Tongling UniversityTongling 244061China Department of Rehabilitation Ganzhou People’s HospitalGanzhou 341099China Shaanxi Key Laboratory of Biomedical Metallic Materials Northwest Institute for Non-Ferrous Metal ResearchXi’an 710016China State Key Laboratory of High Performance Complex Manufacturing Central South UniversityChangsha 410083China School of Mechanical and Electrical Engineering Jiangxi University of Science and TechnologyGanzhou 341000China College of Engineering and Applied Science Nanjing University210089China

biomedical magnesium(Mg)alloys have garnered significant attention because of their unique biodegradability,favorable biocompatibility,and suitable mechanical *** incorporation of rare earth(RE)elements,with their distinct physical and chemical properties,has greatly contributed to enhancing the mechanical performance,degradation behavior,and biological performance of biomedical Mg ***,a series of RE-Mg alloys are being designed and investigated for orthopedic implants and cardiovascular stents,achieving substantial and encouraging research *** this work,a comprehensive summary of the state-of-the-art in biomedical RE-Mg alloys is *** physiological effects and design standards of RE elements in biomedical Mg alloys are ***,the degradation behavior and mechanical properties,including their underlying action are studied ***,the preparation techniques and current application status of RE-Mg alloys are ***,we address the ongoing challenges and propose future prospects to guide the development of high-performance biomedical Mg-RE alloys.

关键词： Magnesium alloy Rare earth elements Biodegradation behavior Mechanical performance Biological properties

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Au/SiC Microfluidic Devices Fabricated by Rapid Laser Cladding for Photocatalytic Degradation of Water Pollutants

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ACS Sustainable Chemistry and engineering 2024年第11期12卷 4486-4496页

作者： Chang, Chun-Hao Lin, Hsiu-Pen Chen, Chien-Wei Lu, Yu-Cheng Hsiao, Fu-He Hsieh, Chi-Hsiang Lin, Bo-Cheng Yu, Bang-Ying Ma, Dai-Liang Kuo, Hao-Chung Tu, Chang-Ching Li, Bor-Ran Institute of Biomedical Engineering College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu300093 Taiwan Department of Electrical and Computer Engineering College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu300093 Taiwan Centre for Emergent Functional Matter Science National Yang Ming Chiao Tung University Hsinchu300093 Taiwan Department of Electrophysics College of Science National Yang Ming Chiao Tung University Hsinchu300093 Taiwan Semiconductor Research Center Hon Hai Research Institute Taipei11492 Taiwan Department of Photonics Institute of Electro-Optical Engineering College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu300093 Taiwan Taisic Materials Corp. Taoyuan320 Taiwan Department of Electrical Engineering National Central University Taoyuan32001 Taiwan Medical Device Innovation and Translation R&D Center National Yang Ming Chiao Tung University Taipei112304 Taiwan

The increasing proliferation of third-generation semiconductor silicon carbide (SiC) products has led to the emergence of SiC powder as an industrial byproduct. To reutilize the SiC efficiently, we propose a facile method for fabrication of photocatalytic plates from reclaimed SiC. Our approach involves affixing the SiC onto a glass surface with laser cladding, followed by sputter deposition of a gold film and laser annealing. The resulting nanogold-coated SiC plate exhibited enhanced photocatalytic activity due to the injection of hot electrons into the SiC via surface plasmon resonance. Unlike chemical reduction, which requires hours for the synthesis, purification, and isolation of Au/SiC, our approach accomplished this in just 30 min. When illuminated, the Au/SiC plate generated electron-hole pairs that formed radicals in the presence of water and oxygen, leading to the decomposition of methylene blue. Furthermore, the Au/SiC plate can be integrated into a microfluidic device for an enhanced degradation rate and efficiency. This research provides a simple and environmentally friendly approach to the production of photocatalytic plates from reclaimed SiC and contributes to sustainable development. © 2024 The Authors. Published by American Chemical Society.

关键词： Silicon carbide

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A New Approach in Detection of Biomarker 2-propanol with PTFE-Coated TiO2 Nanostructured Films 6th

A New Approach in Detection of Biomarker 2-propanol with PTF...

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6th International Conference on Nanotechnologies and biomedical engineering, ICNBME 2023

作者： Schröder, Stefan Brinza, Mihai Cretu, Vasile Zimoch, Lukas Gronenberg, Monja Ababii, Nicolai Railean, Serghei Strunskus, Thomas Pauporte, Thierry Adelung, Rainer Faupel, Franz Lupan, Oleg Chair for Multicomponent Materials Department of Materials Science Faculty of Engineering Kiel University Kaiserstraße 2 Kiel24143 Germany Center for Nanotechnology and Nanosensors Department of Microelectronics and Biomedical Engineering Technical University of Moldova 168 Stefan cel Mare Avenue Chisinau2004 Moldova Functional Nanomaterials Department of Materials Science Faculty of Engineering Kiel University Kaiserstraße 2 Kiel24143 Germany Institut de Recherche de Chimie Paris-IRCP Chimie ParisTech PSL Université 11 rue Pierre et Marie Curie Paris Cedex 0575231 France

ISBN: (纸本)9783031427817

Certain molecules act as biomarkers in exhaled breath or outgassing vapors of biological systems. Metal oxide gas sensors are of great interest to detect these molecules. However, often they are not selective enough to identify the specific molecules. In addition, they typically lose their excellent performance at high humidity levels. In this study nanoscale polytetrafluoroethylene (PTFE) thin films deposited via solvent-free initiated chemical vapor deposition (iCVD) were investigated as a possible pathway to tune the selectivity of metal oxide gas sensors as well as hydrophobic surface functionalization. The gas-sensing properties of two types of PTFE-coated gas-sensing structures are measured for this purpose at several operating temperatures. The first structure is a thermally annealed TiO2 film while the second structure is a thermally annealed TiO2 film with an additional CuO film. After the deposition of the iCVD PTFE thin films the structures exhibit a high response and excellent selectivity to 2-propanol vapor. The experimental data presented here, promote the use of such PTFE-coated gas sensing structures as reliable, accurate and selective sensor structures for the tracking of gases at low concentrations. This enables new possibilities in application fields like biomedical diagnosis, biosensors, and the development of non-invasive technology. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Biomarkers

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Thermal Hall effect in insulating quantum materials

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The Innovation 2022年第5期3卷 3-4页

作者： Shucheng Guo Youming Xu Ran Cheng Jianshi Zhou Xi Chen Department of Electrical and Computer Engineering University of CaliforniaRiversideRiversideCA 92521USA Department of Physics and Astronomy University of CaliforniaRiversideRiversideCA 92521USA Materials Science and Engineering Program Department of Mechanical EngineeringUniversity of Texas at AustinAustinTX 78712USA

The emerging field of quantum materials involves an exciting new class of materials in which charge,spin,orbital,and lattice degrees of freedom are intertwined,exhibiting a plethora of exotic physical *** materials include,but are not limited to,superconductors,topological quantum matter,and systems with frustrated spins,which enable a wide range of potential applications in biomedicine,energy transport and conversion,quantum sensing,and quantum information processing。

关键词： properties. quantum topological

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TiO2 Hole Transport Layer Incorporated in a Thermally Evaporated Sb2Se3 Photoelectrode Exhibiting Low Onset Potential for Photoelectrochemical Applications

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Energy and Fuels 2024年第17期38卷 16936-16948页

作者： Xavier, Thatheyus Peter Piraviperumal, Malar Kuo, Chih-Yu Govindasamy, Mani Thinfilm Photovoltaics Laboratory Department of Physics and Nanotechnology SRM Institute of Science and Technology Tamil Nadu Kattankulathur603203 India Department of Chemical Engineering & Biotechnology National Taipei University of Technology Taipei City10608 Taiwan Research Center for Intelligence Medical Devices Ming Chi University of Technology New Taipei City243303 Taiwan Department of Research and Innovation Saveetha School of Engineering SIMATS Chennai602105 India Taipei10608 Taiwan International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City243303 Taiwan

Developing cost-effective photoelectrodes with a low band gap in the NIR-visible regions remains a challenge to achieve effective hydrogen production. We report the details of superstrate-configured photocathodes, consisting of antimony selenide (Sb2Se3) light absorbing layers with titanium dioxide (TiO2) as a hole transport layer, exhibiting the capability for hydrogen evolution with broad range light absorption enabled by the low band gap value of ∼1.2 eV of Sb2Se3. Strong anisotropy is a significant characteristic property of Sb2Se3, allowing superior electrical transportation along the [hkl] crystallographic orientation, which is obtained via close space evaporation of presynthesized bulk material at a growth temperature of 250 °C, over the solution-processed TiO2 film on a fluorine-doped tin oxide (FTO) substrate. The superstrate-configured FTO/TiO2/Sb2Se3 photocathode exhibited a photocurrent density of 100 μA cm-2 at −0.3 V vs RHE in 0.5 M H2SO4 under 1 sun illumination. To further improve photocurrent density, Pt as a cocatalyst was deposited over Sb2Se3 that led to enhanced photocurrent to 3 mA cm-2 at −0.3 V vs RHE in 0.5 M H2SO4 under 1 sun illumination. Despite the relatively lower photocurrent observed, which resulted due to a large conduction band offset (ΔECB = 0.99 eV) of the TiO2/Sb2Se3 interface in a superstrate configuration, a significantly lower onset potential of −0.1 V vs RHE was observed. The results are encouraging due to the low band gap of Sb2Se3, photocorrosion stability, and straightforward fabrication, which is expected to assist for significant outcomes. © 2024 American Chemical Society.

关键词： Titanium dioxide

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Three-dimensional-printed polycaprolactone scaffolds with interconnected hollow-pipe structures for enhanced bone regeneration

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Regenerative Biomaterials 2022年第1期9卷 471-479页

作者： Jiahua Duan Dong Lei Chen Ling Yufeng Wang Zhicheng Cao Ming Zhang Huikang Zhang Zhengwei You Qingqiang Yao Department of Orthopaedic Surgery Nanjing First HospitalNanjing Medical UniversityNanjing 210006China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringInstitute of Functional MaterialsDonghua UniversityShanghai 201620China Research Base of Textile Materials for Flexible Electronics and Biomedical Applications(China Textile Engineering Society) Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative MedicineShanghai 201620China Department of Cardiology Shanghai 9th People’s HospitalShanghai Key Laboratory of Tissue EngineeringSchool of MedicineShanghai Jiao Tong UniversityShanghai 200011China

Three-dimensional(3D)-printed scaffolds are widely used in tissue engineering to help regenerate critical-sized bone ***,conventional scaffolds possess relatively simple porous structures that limit the delivery of oxygen and nutrients to cells,leading to insufficient bone ***,in the present study,perfusable and permeable polycaprolactone scaffolds with highly interconnected hollow-pipe structures that mimic natural micro-vascular networks are prepared by an indirect onepot 3D-printing *** vitro experiments demonstrate that hollow-pipe-structured(HPS)scaffolds promote cell attachment,proliferation,osteogenesis and angiogenesis compared to the normal non-hollow-pipe-structured ***,in vivo studies reveal that HPS scaffolds enhance bone regeneration and vascularization in rabbit bone defects,as observed at 8 and 12weeks,***,the fabricated HPS scaffolds are promising candidates for the repair of critical-sized bone defects.

关键词： three-dimensional printing interconnected hollow-pipe structure bone regeneration vascularization polycaprolactone

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Goldilocks Energy Minimum: Peptide-Based Reversible Aggregation and Biosensing (Vol 15, Pg 42293, 2023)

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ACS APPLIED materials & INTERFACES 2023年第41期15卷 48838-48838页

作者： Yim, Wonjun Retout, Maurice Chen, Amanda A. Ling, Chuxuan Amer, Lubna Jin, Zhicheng Chang, Yu-Ci Chavez, Saul Barrios, Karen Lam, Benjamin Li, Zhi Zhou, Jiajing Shi, Lingyan Pascal, Tod A. Jokerst, Jesse V. Materials Science and Engineering Program University of California San Diego La Jolla California 92093 United States Department of Nano and Chemical Engineering University of California San Diego La Jolla California 92093 United States Shu Chien-Gene Lay Department of Bioengineering University of California San Diego La Jolla California 92093 United States Department of Radiology University of California San Diego La Jolla California 92093 United States

Colorimetric biosensors based on gold nanoparticle (AuNP) aggregation are often challenged by matrix interference in biofluids, poor specificity, and limited utility with clinical samples. Here, we propose a peptide-driven nanoscale disassembly approach, where AuNP aggregates induced by electrostatic attractions are dissociated in response to proteolytic cleavage. Initially, citrate-coated AuNPs were assembled via a short cationic peptide (RRK) and characterized by experiments and simulations. The dissociation peptides were then used to reversibly dissociate the AuNP aggregates as a function of target protease detection, i.e., main protease (Mpro), a biomarker for severe acute respiratory syndrome coronavirus 2. The dissociation propensity depends on peptide length, hydrophilicity, charge, and ligand architecture. Finally, our dissociation strategy provides a rapid and distinct optical signal through Mprocleavage with a detection limit of 12.3 nM in saliva. Our dissociation peptide effectively dissociates plasmonic assemblies in diverse matrices including 100% human saliva, urine, plasma, and seawater, as well as other types of plasmonic nanoparticles such as silver. Our peptide-enabled dissociation platform provides a simple, matrix-insensitive, and versatile method for protease sensing.

关键词： Aggregation Anatomy Dissociation Metal nanoparticles Peptides and proteins

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