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

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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Silk fibroin-based inks for in situ 3D printing using a double crosslinking process

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Bioactive materials 2024年第5期35卷 122-134页

作者： Francesca Agostinacchio Vincent Fitzpatrick Sandra Dire David LKaplan Antonella Motta National Interuniversity Consortium of Material Science and Technology FlorenceItaly BIOtech Research Center and European Institute of Excellence on Tissue Engineering and Regenerative Medicine Department of Industrial EngineeringUniversity of TrentoTrentoItaly Materials Chemistry Group&“Klaus Müller”Magnetic Resonance Laboratory Department of Industrial EngineeringUniversity of TrentoTrentoItaly Department of Biomedical Engineering Tufts UniversityMedfordMA02155USA

The shortage of tissues and organs for transplantation is an urgent clinical *** situ 3D printing is an advanced 3D printing technique aimed at printing the new tissue or organ directly in the *** ink for this process is central to the outcomes,and must meet specific requirements such as rapid gelation,shape integrity,stability over time,and adhesion to surrounding healthy *** natural materials,silk fibroin exhibits fascinating properties that have made it widely studied in tissue engineering and regenerative ***,further improvements in silk fibroin inks are needed to match the requirements for in situ 3D *** the present study,silk fibroin-based inks were developed for in situ applications by exploiting covalent crosslinking process consisting of a pre-photo-crosslinking prior to printing and in situ enzymatic *** different silk fibroin molecular weights were characterized and the synergistic effect of the covalent bonds with shear forces enhanced the shift in silk secondary structure towardβ-sheets,thus,rapid *** hydrogels exhibited good mechanical properties,stability over time,and resistance to enzymatic degradation over 14 days,with no significant changes over time in their secondary structure and swelling ***,adhesion to tissues in vitro was demonstrated.

关键词： Silk fibroin inks In situ 3D printing Covalent crosslinking Regenerative medicine Rapid gelation

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NIR activated upconversion based nanocatalysts for CT/PA imaging-guided triple synergistic PTT/PDT/CDT cancer treatment

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稀土学报（英文版） 2025年第5期43卷 909-921页

作者： Bin Liu Ziying Wang Zongming Liu Chang Liu Shu Yao Bingqiang Cao Xiaojuan Han Xiaohui Wang Kun Song Jinkai Li School of Material Science and Engineering University of JinanJinan250022China Department of Obstetrics and Gynecology Qilu Hospital of Shandong UniversityJinan250012China School of Material Science and Engineering University of JinanJinan250022China Shandong Provincial Engineering Research Center for Photoelectric Conversion of Semiconductor Materials and Devices Jinan250022China Department of Neurology Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan250021China Institute of Metals Research Chinese Academy of SciencesShenyang110016China School of Material Science and Engineering University of JinanJinan250022China Institute of Metals Research Chinese Academy of SciencesShenyang110016China

Photodynamic therapy(PDT),as a non-invasive treatment,is expected to be widely used in clinical cancer *** this paper,a near-infrared(NIR)light responsive Lu2O3∶Yb/Er/Li-Ce6@MIL-101/GOx-PDA(LCMGP)nanodiagnostic platform was prepared for CT/PA imaging-guided multimodality syner-gistic *** 808 nm laser irradiation,Lu2O3∶Yb/Er/Li-Ce6(LC)NPs in the nano-diagnostic platform are activated and sensitized by NIR light,resulting in the generation of more single-linear oxygen(1O2)for efficient *** oxidase(GOx)and MIL-101(Fe)nanozymes can utilize their excellent enzyme cascade catalytic properties and peroxidase-like catalytic properties to undergo glycolysis reactions and catalyze the decomposition of endogenous hydrogen peroxide(H2O2),producing a large amount of hydroxyl radicals(·OH),achieving efficient chemodynamic therapy(CDT).The func-tionalized modification of polydopamine(PDA)endows the LCMGP nanoparticles with higher photo-thermal conversion efficiency,which can prompt high local temperature at the tumor site under the irradiation of NIR light to achieve efficient photothermal therapy(PTT).In addition,hyperthermia ac-celerates the catalytic efficiency of the nanozymatic cascade of LCMGP nanoparticles to enhance ROS production while increasing cellular uptake,resulting in PTT-induced PDT/CDT synergistic effect(96％).Based on the excellent photothermal conversion effect of PDA and the high X-ray attenuation effect of Lu/Fe,the LCMGP nanotherapeutic system demonstrates good CT/PA imaging function,providing new in-sights and ideas for imaging-mediated multimodal synergistic therapy.

关键词： Nanotherapeutic system PDT/PTT/CDT Nanozymes CT/PA imaging Synergetic therapy Rare earths

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Novel photoactive material and fabrication techniques for solar cells application:nanocellulose-based graphene oxide CdS composite

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Clean Energy 2024年第2期8卷 189-216页

作者： Hassan Oriyomi Shoyiga Stephen Okiemute Akpasi Joseph Akpan Ubani Oluwaseun Amune Sammy Lewis Kiambi Chemistry Department North-West UniversityMafikengSouth Africa Material Science Innovation and Modelling(MaSIM)Research Focus Area Faculty of Natural and Agricultural SciencesNorth-West University(Mafikeng Campus)MmabathoSouth Africa Green Engineering Research Group Chemical Engineering DepartmentDurban University of TechnologyDurbanSouth Africa Industrial Engineering Department Durban University of TechnologyDurbanSouth Africa Chemical Engineering Department Edo State UniversityUzairueNigeria Chemical Engineering Department Vaal University of TechnologyVanderbijlparkSouth Africa

In recent times,solar energy has become one of the largest available sources of renewable energy at our ***,the design of highly efficient solar cells is increasingly becoming crucial as there has been a surge for economically viable alternative energy sources with the lowest *** advances have been made through different routes to make photovoltaic(PV)/solar technologies economically viable,eco-friendly and consequently *** a result,cellulose nanomaterials have become one of the emerging technologies in this regard because of the advantages of high-value bio-based nanostructured materials,such as their abundance and ***-based photoactive nanocomposite materials can be made by integrating conducting photoactive and electroconductive materials with hydrophilic biocompatible *** nanoparticles,such as graphene/reduced graphene oxide cadmium sulphide quantum dots,amongst others,can be introduced into the nanocellulose matrix and can be applied either as charge transporters or photoactive materials in different types of solar ***,in this review,we highlight the optoelectronic properties of different photoactive materials,particularly nanocellulose-based graphene nanocomposites;their efficiencies and drawbacks were *** effect of doping each PV material on the PV performance is also *** is anticipated that the novel material would result in a reduction in the cost of solar cells,jointly enhancing their efficacy in generating environmentally friendly *** the fabrication techniques and equipment play a crucial role in the development of solar cells,the fabrication techniques of bulk-heterojunction(BHJ)cells containing a nanocellulose-based graphene composite and case studies of already fabricated BHJ PV cells with nanocellulose-based graphene composite are discussed.

关键词： nanocellulose-based composite bulk heterojunction graphene composite photoactive materials fabrication techniques solar energy power conversion efficiency

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Oxidation-induced superelasticity in metallic glass nanotubes

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Nature materials 2024年第1期23卷 52-57页

作者： Li, Fucheng Zhang, Zhibo Liu, Huanrong Zhu, Wenqing Wang, Tianyu Park, Minhyuk Zhang, Jingyang Bönninghoff, Niklas Feng, Xiaobin Zhang, Hongti Luan, Junhua Wang, Jianguo Liu, Xiaodi Chang, Tinghao Chu, Jinn P. Lu, Yang Liu, Yanhui Guan, Pengfei Yang, Yong Department of Mechanical Engineering College of Engineering City University of Hong Kong Kowloon Tong Hong Kong Institute of Physics Chinese Academy of Sciences Beijing China Songshan Lake Materials Laboratory Dongguan China Beijing Computational Science Research Center Beijing China Department of Material Science and Engineering National Taiwan University of Science and Technology Taipei Taiwan Department of Materials Science and Engineering College of Engineering City University of Hong Kong Kowloon Tong Hong Kong College of Mechatronics and Control Engineering Shenzhen University Shenzhen China Department of Mechanical Engineering The University of Hong Kong Pok Fu Lam Hong Kong Department of System Engineering College of Engineering City University of Hong Kong Kowloon Tong Hong Kong

Although metallic nanostructures have been attracting tremendous research interest in nanoscience and nanotechnologies, it is known that environmental attacks, such as surface oxidation, can easily initiate cracking on the surface of metals, thus deteriorating their overall functional/structural properties 1–3. In sharp contrast, here we report that severely oxidized metallic glass nanotubes can attain an ultrahigh recoverable elastic strain of up to ~14% at room temperature, which outperform bulk metallic glasses, metallic glass nanowires and many other superelastic metals hitherto reported. Through in situ experiments and atomistic simulations, we reveal that the physical mechanisms underpinning the observed superelasticity can be attributed to the formation of a percolating oxide network in metallic glass nanotubes, which not only restricts atomic-scale plastic events during loading but also leads to the recovery of elastic rigidity on unloading. Our discovery implies that oxidation in low-dimensional metallic glasses can result in unique properties for applications in nanodevices. © 2023, The Author(s), under exclusive licence to Springer Nature Limited.

关键词： Metallic glass

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A Machine Learning Model for Predicting the Shear Strength of Slender FRP-Reinforced Concrete Elements

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Journal of engineering science and Technology Review 2025年第1期18卷 48-56页

作者： Salem, Nermin M. Kontoni, Denise-Penelope N. Deifalla, Ahmed Farouk Ambrosios-AntoniosSavvides Department of Electrical Engineering Faculty of Engineering and Technology Future University in Egypt New Cairo11835 Egypt Department of Civil Engineering School of Engineering University of the Peloponnese PatrasGR-26334 Greece School of Science and Technology Hellenic Open University PatrasGR-26335 Greece Department of Structural Engineering and Construction Management Faculty of Engineering and Technology Future University in Egypt New Cairo11835 Egypt School of Civil Engineering National Technical University of Athens Zografou Campus AthensGR-15773 Greece Laboratory of Applied Mechanics Department of Naval Science Hellenic Naval Academy Piraeus185 39 Greece

One-way shear failure of Fiber-Reinforced Polymer-reinforced concrete (FRP-RC) elements occurs with no adequate warning as well as it happens in a complicated and devastating manner. Recent research efforts have yielded several pioneering works in this area;however, there is a lack of agreement on the physical understanding of the behavior continues to be an issue. Thus, in the current study, a Machine Learning shear strength model is developed for FRP-RC elements. A boosted regression model is developed and trained using an experimental database composed of 420 records. The boosted model has proved a better prediction accuracy using statistical measures, the model reported a variation coefficient (R!) = 0.91, root mean square error (RMSE) = 13175 and mean absolute error (MAE) = 8.8684. Also, a study of the importance of the input parameters has been presented. The proposed model captured the depth effect, the wide beam effect, and the dowel action. © (2025), (International Hellenic University School of science and Technology). All rights reserved.

关键词： Mean square error

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Influence of deformation zone length on bending radius of SS304 tubes with small diameters manufactured via free bending-based active motion

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Chinese Journal of Aeronautics 2023年第6期36卷 420-434页

作者： Shenghan HU Cheng CHENG Ali Abd EL-ATY Shuo ZHENG Xunzhong GUO Chunmei LIU Jie TAO College of Material Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 21ll00China Department of Materials Science and Engineering&RIAM Seoul National UniversityI-Gwanak-roGwanakguSeoul 08826Republic of Korea Mechanical Engineering Department Faculty of Engineering-HelwanHelwan UniversityCairo 11795Egypt

In three and six-axis free-bending equipment,the deformation zone length(A)is a fixed mechanical structure parameter modified when the relevant structure is redesigned and *** this study,a six degree of freedom(6-DOF)parallel mechanism was used as the control mechanism of the bending die,and a new method of changing the deformation zone length(A)was ***,an idealized geometric model of free bending-based active motion was ***,the influence of the deformation zone length(A)on the bending moment and the bending radius of the tube was *** addition,the finite element simulation and a kinematic model of free bending-based active motion controlled by the 6-DOF parallel mechanism were established,and bending processes of the SS304 tube with different deformation zone lengths were ***,the impact of the deformation zone length(A)on the bending radius,bending moment,wall thickness,and motion of the parallel mechanism were ***,experiments were carried out on the free-bending equipment based on the 6-DOF parallel *** verified the rules in the theoretical analysis,finite element simulation,and kinematic simulation.

关键词： Bending radius Deformation zone length 6-DOF parallel mechanism Free bending-based active motion Small diameter tube

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Water–energy–food nexus in Kenya: A review of policy interventions

World Water Policy

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World Water Policy 2023年第4期9卷 823-836页

作者： Kanda, Edwin Kimutai Lusweti, Elizabeth Odhiambo, Kevin O. Department of Civil and Structural Engineering Masinde Muliro University of Science and Technology Kakamega Kenya

The water–energy–food (WEF) nexus approach is important in promoting sustainable management of resources, alleviating poverty and achieving sustainable development goals (SDGs). Given the importance of the WEF nexus, it is currently being promoted and developed in most countries via policy interventions as a response to climate change-related problems and other nexus challenges. In the past, Kenya faced numerous challenges in achieving SDGs concerning food, water, and energy security. To address this, cross-sectorial policy interventions, legal instruments, and institutional frameworks have been developed. Therefore, this review evaluates the major policies, interventions, and strategies related to WEF, their interconnection, and their relevance to SDG targets. The review also assesses the efficacy of the policies and highlights gaps and potential for policy change. The key strategic interventions considered include Kenya Vision 2030, agriculture, energy, and water policies. From the review, there have been some successful policy measures. However, the intricate interconnections between the water, energy, and food sectors necessitate a more integrated strategy for achieving sustainability. The water policy is central to the achievement of SDGs for WEF security. Therefore, there is a need for the implementation of a holistic approach between the WEF agencies and stakeholders to address the policy interventions required for sustainable development. Water policies should be aligned with other interlinked policies on food, energy, and the environment. © 2023 Policy Studies Organization.

关键词： agricultural policies climate change adaptation energy security food security sustainable development goals water policy

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Does friction contribute to formability improvement using servo press?

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Friction 2023年第5期11卷 820-835页

作者： Kali PRASAD Aishwary GUPTA Hariharan KRISHNASWAMY Uday CHAKKINGAL Dilip K.BANERJEE Myoung-Gyu LEE Department of Mechanical Engineering Indian Institute of Technology MadrasChennai 600036India Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea Department of Metallurgical and Materials Engineering Indian Institute of Technology MadrasChennai 600036India Material Measurement Laboratory National Institute of Standards and Technology(NIST)Gaithersburg 20899USA

Servo press forming machines are advanced forming systems that are capable of imparting interrupted punch motion,resulting in enhanced room temperature *** exact mechanism of the formability improvement is not yet *** contribution of interrupted motion in the ductility improvement has been studied through stress relaxation phenomena in uniaxial tensile(UT)***,the reason for improved formability observed when employing servo press is complicated due to the additional contribution from frictional *** the present work,an attempt is made to decouple the friction effect on formability improvement *** improved formability is studied using a hole expansion test(HET).The limit of forming during hole expansion is modeled using the Hosford–Coulomb(HC)damage criteria,which is implemented as a user subroutine in a commercial explicit finite element(FE)*** the contribution of stress relaxation is accounted for in the evolution of the damage variable during interrupted ***,the difference between simulation and experimental hole expansion ratio(HER)can be used to decouple the friction effect from the overall formability improvement during hole *** improvement in HER due to stress relaxation and friction effect is *** study showed that the model effectively captures the hole expansion deformation process in both monotonic and interrupted loading *** to stress relaxation,friction effect played a major role during interrupted HET.

关键词： servo press hole expansion test(HET) dual phase steel finite element(FE)analysis Hosford-Coulomb(HC)ductile fracture model

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Investigation and impact assessment of soybean biodiesel, methyl oleate, and diesel blends on CRDI performance and emissions

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materials science for Energy Technologies 2024年第1期7卷 124-132页

作者： Hasnain, S.M. Mozammil Sharma, Rabindra Prasad Chatterjee, Rajeshwari Kumar, Gaurav Pandey, Shatrudhan Khan, Md Modassir Deifalla, Ahmed Farouk Zare, Ali Faculty of Engineering and Applied Science Usha Martin University Ranchi835103 India Department of Mechanical Engineering Birla Institute of Technology Mesra Ranchi835215 India Department of Chemical Engineering Birla Institute of Technology Mesra Ranchi835215 India Department of Production and Industrial Engineering Birla Institute of Technology Mesra Ranchi835215 India Department of Mechanical Engineering SRM Instiute of Science and Technology Tiruchchirappalli621105 India Department of Structural Engineering and Construction Management Future University New Cairo City11835 Egypt School of Engineering Deakin University 75 Pigdons Road Waurn Ponds VIC3220 Australia

In the present study, a binary biofuel blend was prepared by blending soy methyl ester (SME100) and methyl oleate (MO) SME50-M50 with diesel. The physiochemical properties of blended fuels were also investigated. The performance and emissions characteristics of all fuel blends were estimated using a common-rail direct injection (CRDI) engine. The outcomes demonstrate a reduction in brake-specific fuel consumption (BSFC) when enriched biodiesel is used in comparison to SME100, nonetheless by the virtue of viscosity and heating value there is an increase in the BSFC value when compared to diesel. The average BSFC values were obtained as 5.3% (E25), 10.6% (E50), 17.5% (E75), 30% (SME100) and 14.9% (SME50-M50) higher than that of diesel. BTE was found to be highest for E25 and lowest for SME100 among all the blends. NOx emissions with blended biodiesel were slightly higher than diesel on account of MO being unsaturated, resulting in shorter ignition delay. The average NOx values obtained were higher than that of diesel and the corresponding values are 2.91% (E25), 4.1% (E50), 5.8% (E75), 8.3% (SME100) and 15.8% (SME50-M50). As a result of the increased oxygen content of the fuel, the concentrations of UHC and CO depreciated with the rise in concentration of soy methyl ester and MO (SME50-M50). Currently, Euro 6.2, which is the most recent emission regulation, uses 10% biofuel (B10);however, the results of this study establishes that E25, as an alternate fuel, complies with the contemporary engines without requiring any engine modifications. © 2023

关键词： Biodiesel

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