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Emissive metallacages for biomedical applications

science China Chemistry 2023年第9期66卷 2447-2459页

作者： Qian Feng Rongrong Li Tingting Gao Dake Chu Mingming Zhang State Key Laboratory for Mechanical Behavior of Materials Shaanxi International Research Center for Soft MatterSchool of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China Department of Gastroenterology the First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061China

Owing to their appealing three-dimensional structures and tunable photophysical properties, emissive metallacages have been widely applied in recognition and sensing, adsorption and separation, catalysis, etc. Recently, the application of emissive metallacages in biomedical fields has emerged as a hot research topic, because multiple biological functionalities can be facilely integrated into metallacage-based platforms to deliver different functions. In this review, the applications of emissive metallacages in bio-imaging, delivery and cancer theranostics are systematically summarized. The dilemmas and challenges of metallacage-based biomedical materials are also raised at the end of this review. We hope this review would provide some guidance for the construction of novel emissive metallacages with biological functions, and further advance the development of emissive metallacages as biomedical materials.

关键词： emissive metallacages host-guest complexation bioimaging delivery cancer theranostics

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Development of self-cleaning and antibacterial properties on cotton fabric using silver nanoparticles and PFOTS

SPE Polymers

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SPE Polymers 2024年第4期5卷 568-575页

作者： Khan, Mahnoor Saeed, Muhammad Adnan Ullah, Sultan Repon, Md. Reazuddin Pranta, Arnob Dhar Yunusov, Nurzod Hossain, Md Monir Centre of Excellence in Solid State Physics University of the Punjab Lahore Pakistan Department of Mechanical Engineering Gazi University Ankara Turkey Department of Mechanical Engineering Faculty of Mechanical Engineering and Design Kaunas University of Technology Kaunas Lithuania Department of Textile Engineering Daffodil International University Dhaka Bangladesh Department of Bioproducts and Biosystems School of Chemical Engineering Aalto University Espoo Finland Department of Production Engineering Faculty of Mechanical Engineering and Design Kaunas University of Technology Kaunas Lithuania ZR Research Institute for Advanced Materials Sherpur Bangladesh Department of Textile Engineering Mawlana Bhashani Science and Technology University Tangail Bangladesh Department of Technological Education Fergana State University Fergana Uzbekistan Department of Wet Process Engineering Textile Engineering College Noakhali Bangladesh

The demand for superhydrophobic fabric with self-cleaning and antibacterial features as potential practical applications has been rising steadily with the passage of time. In this research work, the wet chemical method is used to manufacture cotton with a superhydrophobic coating. Thus, Nanoparticles of silver were produced by using an in situ method. Afterward, the fabric is treated with a solution of perfluorooctyltriethoxysilane to make it superhydrophobic. The cotton fabric performs remarkably with exceptional hydrophobicity as it had a contact angle of 157 ± 1° and less than 10° in sliding angle. Water droplet's dynamic behavior is also studied so that the superhydrophobic fabric development can be proven. The fabric shows excellent chemical durability by performing chemical tests. The antimicrobial and self-cleaning properties are greatly enhanced by the superhydrophobic coating on cotton. Particle density on the superhydrophobic cotton before and after self-cleaning was found 5.1 and 0.4 mg/cm². In addition, the treated cotton fabric also exhibited superior antibacterial properties against Escherichia coli bacteria. Therefore, the developed multifunctional cotton fabric can be used in real-life applications. Highlights: Cotton fabric enables to repelling of dirt, oil, and water-based stains more effectively. Silver nanoparticles possess potent antibacterial properties. Incorporation of PFOTS controls the release of silver into the environment. Versatile applications from healthcare and hospitality to outdoor and athletic apparel. © 2024 The Author(s). SPE Polymers published by Wiley Periodicals LLC on behalf of Society of Plastics Engineers.

关键词： in situ method medical applications multifunctional properties nanoparticles superhydrophobic

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Tuning the microstructure for superb corrosion resistance in eutectic high entropy alloy

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Journal of materials science & Technology 2022年第14期109卷 197-208页

作者： S.Shuang Q.Yua X.Gao Q.F.He J.Y.Zhang S.Q.Shi Y.Yang Department of Mechanical Engineering City University of Hong KongKowloon TongKowloonHong KongChina Department of Mechanical Engineering Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of Materials Science and Engineering City University of Hong KongKowloon TongKowloonHong KongChina

In this work,we demonstrate that the corrosion resistance of the FeCrNiCoNb_(0.5) eutectic high entropy alloy(EHEA)can be tuned by controlling the size of its eutectic *** microstructure refinement,the EHEA exhibits a superb corrosion resistance in 1 M NaCl in terms of a very low corrosion current density and an ultra-high transpassviation potential,which outperforms a variety of other HEAs and conventional metals and *** the fundamental level,the microstructure refinement results in a rapid formation of a thick and compact passive film with less Cl-adsorption on the EHEA,which results in significant enhancement in its corrosion *** outcome of our research provides important insights into the design of corrosion resistant chemically complex alloys.

关键词： Eutectic high entropy alloy Passivation Transpassivation potential Microstructure size

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Variable stiffness wires based on magnetorheological liquid metals

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International Journal of Smart and Nano materials 2022年第2期13卷 232-243页

作者： Xiangbo Zhou Jian Shu Hu Jin Hongtai Ren Gang Ma Ning Gong Duan Ge Juan Shi Shi-Yang Tang Guolin Yun Hongda Lu Shuai Dong Xiangpeng Li Shiwu Zhang Weihua Li CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Precision Machinery and Precision InstrumentationUniversity of Science and Technology of ChinaHefeiAnhuiChina School of Mechanical MaterialsMechatronic and Biomedical EngineeringUniversity of WollongongNSWAustralia Department of Electronic Electrical and Systems EngineeringSchool of EngineeringUniversity of BirminghamBirminghamUK College of Mechanical and Electrical Engineering Soochow UniversitySuzhouJiangsuChina

Magnetorheological fluid(MRF)has shown its great potential in the development of large mechanical devices,such as dampers,shock absorbers,rotary brakes,clutches,and prosthetic ***,more research focus has been invested on using MRF to develop soft,stretchable,and miniaturized devices with variable stiffness for realizing functionalities that cannot be achieved using solid smart ***,based on liquid metal magnetoactive slurries(LMMS),a variable stiffness wire with excellent electrical conductivity is *** exposure to a magnetic field,the LMMS wire has an extremely low stiffness,and can be easily stretched while maintaining an excellent electrical *** applying a magnetic field,the wire becomes much stiffer and can retain its shape even under a *** combination of properties of flexibility,high electrical conductivity,and variable stiffness of the wire is harnessed to make a flexible gripper that can grasp objects of various ***,by using gallium instead of its liquid metal alloys,the tunable stiffness range of the LMMS wire is signifi-cantly enhanced and can be controlled using both external magnetic fields and temperature-induced phase *** presented LMMS wire has the potential to be applied in flexible electronics,soft robotics and so on.

关键词： Liquid metal magnetorheological fluid(MRF) various stiffness stretchable electronics soft robotics

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Anomalous properties of spark plasma sintered boron nitride solids

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materials Today 2025年 86卷 42-51页

作者： Biswas, Abhijit Serles, Peter Alvarez, Gustavo A. Schimpf, Jesse Hache, Michel Kong, Jonathan Demingos, Pedro Guerra Yuan, Bo Pieshkov, Tymofii S. Li, Chenxi Puthirath, Anand B. Gao, Bin Gray, Tia Zhang, Xiang Murukeshan, Jishnu Vajtai, Robert Dai, Pengcheng Singh, Chandra Veer Howe, Jane Zou, Yu Martin, Lane W. Clancy, James Patrick Tian, Zhiting Filleter, Tobin Ajayan, Pulickel M. Department of Materials Science and Nanoengineering Rice University HoustonTX77005 United States Department of Mechanical & Industrial Engineering University of Toronto 5 King's College Road TorontoM5S 3G8 Canada Sibley School of Mechanical and Aerospace Engineering Cornell University IthacaNY14853 United States Department of Materials Science and Engineering University of California Berkeley94720 United States Department of Materials Science and Engineering University of Toronto 184 College St TorontoM5S 3E4 Canada Department of Physics and Astronomy McMaster University HamiltonL8S 4M1 Canada Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Physics and Astronomy Rice University HoustonTX77005 United States Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley94720 United States

Hexagonal boron nitride (h-BN) is a brittle ceramic with a layered structure, however, recent experiments have suggested that inter-layer structural engineering could be key to new structural and functional properties. Here we report the scalable bulk synthesis of high-density crystalline h-BN solids, by using high-temperature spark plasma sintering (SPS) of h-BN powders, which show high values of mechanical strength, ductility, dielectric constant, thermal conductivity, and exceptional neutron radiation shielding capability. Through exhaustive characterizations we reveal that SPS induces non-basal plane crystallinity, twisting of layers, and facilitates inter-grain fusion with a high degree of in-plane alignment across macroscale dimensions, resulting in near-theoretical density and improved properties. Our findings highlight the importance of material design, via new approaches such as layer twisting and interlayer interconnections, to create novel ceramics with properties that could go beyond their intrinsic limits. © 2025

关键词： Ductility

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High-temperature tribological properties of tungsten carbide reinforced high-entropy-alloy composite coating by laser cladding

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Ceramics International 2025年第14期51卷 19485-19496页

作者： Wu, Wenxing Liu, Hanxia Jin, Xuming Guo, Liangliang Zhu, Tao Hu, Liangbin Yang, Chao Chen, Pinghu Qiu, Changjun Chu, Paul K. College of Nuclear Science and Technology University of South China Hengyang421001 China School of Electrical Engineering University of South China Hengyang421001 China Key Laboratory of Hunan Province of Equipment Safety Service Technology Under Extreme Environment College of Mechanical Engineering University of South China Hengyang421001 China National Engineering Research Center of Light Alloy Net Forming School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai200240 China Department of Materials Science & Engineering City University of Hong Kong Tat Chee Avenue Kowloon999077 China

To solve the serious wear problem of mold steels at a high temperature, a 15 wt% WCp (Tungsten Carbide particles) reinforced Fe50Mn30Cr10Co10 HEA (High Entropy Alloy) composite coating is fabricated by laser cladding to improve the high-temperature wear resistance based on high hardness and thermal stability of HEA. Tribological tests are carried out at different temperature, and the wear mechanism is explored. The experimental results reveal three main phases of γ-Fe, WC, and W2C in the LCed (Laser Cladded) HEA composite coating. Small amounts of nanoscale WC and MnO are precipitated to enhance the mechanical properties. The variation rule pertaining to the volume wear rate is that the values rise first and fall later with increasing temperature. The maximum wear rate is observed above 5 × 10−5 mm3/N·m at 400 °C. Although the hardness may diminish with increasing temperature in theory, the relative wear resistance can be improved because the oxide could enhance the supportive capacity and isolating effects of the glaze layer between the friction pair. Fe2O3 can be considered a solid lubricant to reduce the wear rate. With increasing friction temperature, the wear mechanism changes from typical abrasive/fatigue wear to adhesive/delamination wear. Consequently, the 15 wt% WCp-reinforced HEA composite shows excellent wear resistance at 800 °C relative to H13 steel and the results provide the theoretical and experimental basis for liquid die forging. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Composite coatings

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Trace Determination of Cardiac Troponin I Using a Label-Free Fiber Optical Localized Surface Plasmon Resonance Biosensors

Trace Determination of Cardiac Troponin I Using a Label-Free...

引用

2024 Laser Applications to Chemical, Security and Environmental Analysis, LACSEA 2024 - Part of Optica Sensing Congress

作者： Chiang, Chang-Yue Chen, Chien-Hsing Wang, Chien-Tsung Wu, Chin-Wei Chiang, Hsing-Yu Graduate School of Engineering Science and Technology Interdisciplinary Program of Engineering National Yunlin University of Science and Technology Yunlin64002 Taiwan Department of Biomechatronics Engineering National Pingtung University of Science and Technology Pingtung91201 Taiwan Department of Chemical & Materials Engineering National Yunlin University of Science and Technology Yunlin64002 Taiwan

ISBN: (纸本)9781957171371

This work proposes a carboxyl-graphene-oxide-based fiber optic localized surface plasmon resonance biosensor which employed anti-Cardiac Troponin I (anti-cTnI) as the recognition element to detect the cTnI-protein in 10 min with a limit of detection (LOD) of 5.8 pM, which meets the acceptable LOD for clinical testing of 0.04 ng/mL. © Optica Publishing Group 2024, © 2024 The Author(s)

关键词： Surface plasmon resonance

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Soft,full Wheatstone bridge 3D pressure sensors for cardiovascular monitoring

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npj Flexible Electronics 2024年第1期8卷 910-917页

作者： Yoonseok Park Haiwen Luan Kyeongha Kwon Ted S.Chung Seyong Oh Jae-Young Yoo Gooyoon Chung Junha Kim Suhyeon Kim Sung Soo Kwak Junhwan Choi Hoang-Phuong Phan Seonggwang Yoo Hyoyoung Jeong Jaeho Shin Sang Min Won Hong-Joon Yoon Yei Hwan Jung John A.Rogers Department of Advanced Materials Engineering for Information and Electronics Integrated Education Institute for Frontier Science&Technology(BK21 Four)Kyung Hee UniversityYongin-siGyeonggi-do 17104Republic of Korea Department of Mechanical and Aerospace Engineering University of California San DiegoLa JollaCA 92093USA School of Electrical Engineering Korea Advanced Institute of Science and TechnologyDaejeonRepublic of Korea Department of Mechanical Engineering Columbia UniversityNew YorkNYUSA Division of Electrical Engineering Hanyang University ERICAAnsan 15588Republic of Korea Department of Semiconductor Convergence Engineering Sungkyunkwan UniversitySuwonRepublic of Korea Biomedical Research Division Korea Institute of Science and TechnologySeoul 02792Republic of Korea Department of Chemical Engineering Dankook UniversityYonginGyeonggi-do 16890Republic of Korea School of Mechanical and Manufacturing Engineering Tyree Institute of Health EngineeringUniversity of New South WalesSydneyNSW 2052Australia Querrey Simpson Institute for Bioelectronics Northwestern University EvanstonEvanstonIL 60208USA Department of Electrical and Computer Engineering University of California DavisDavisCA 95616USA Department of Electrical and Computer Engineering Sungkyunkwan University2066Seobu-roJangan-guSuwon-siGyeonggi-do 16419Republic of Korea Department of Electronic Engineering Gachon UniversitySeongnamsiGyeonggi-do 13120Republic of Korea Department of Electronic Engineering Hanyang UniversitySeoulRepublic of Korea Department of Materials Science and Engineering Biomedical EngineeringNeurological SurgeryChemistryMechanical EngineeringElectrical Engineering and Computer Science Simpson Querrey Institute and Feinberg Medical SchoolCenter for Bio-Integrated ElectronicsNorthwestern University EvanstonEvanstonIL 60208USA

Variations in parameters associated with the ambient environment can introduce noise in soft,body-worn *** example,many piezoresistive pressure sensors exhibit a high degree of sensitivity to fluctuations in temperature,thereby requiring active compensation *** research presented here addresses this challenge with a multilayered 3D microsystem design that integrates four piezoresistive sensors in a full-Wheatstone bridge *** optimized layout of the sensors relative to the neutral mechanical plane leads to both an insensitivity to temperature and an increased sensitivity to pressure,relative to previously reported devices that rely on similar operating *** this 3D pressure sensor into a soft,flexible electronics platform yields a system capable of real-time,wireless measurements from the surface of the *** above the radial and carotid arteries yields high-quality waveforms associated with pulsatile blood flow,with quantitative correlations to blood *** results establish the materials and engineering aspects of a technology with broad potential in remote health monitoring.

关键词： Wheat bridge thereby

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Hydrogen Embrittlement of Advanced High-strength Steel S960MC Used in Transport and Vehicle Industry and the Influence of Potassium Thiocyanate during Hydrogenation

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Periodica Polytechnica Transportation engineering 2024年第4期52卷 355-361页

作者： Drímalová, Petra Nový, František Váňová, Petra Straková, Denisa Department of Materials Engineering Faculty of Mechanical Engineering University of Žilina Univerzitná 8215/1 Žilina010 26 Slovakia Centre for Energy and Environmental Technologies VSB-Technical University of Ostrava 17. Listopadu 2172/15 Poruba Ostrava708 00 Czech Republic Department of Materials Engineering Faculty of Materials Science and Technology VSB-Technical University Ostrava 17. Listopadu 2172/15 Poruba Ostrava708 00 Czech Republic

Advanced high-strength steels (AHSS) are currently facing a serious challenge from hydrogen embrittlement, which significantly affects their mechanical properties. Problems arise when hydrogen diffuses into the material and accumulates at grain boundaries, inclusions, or microcracks, degrading the material's characteristics. The main objective of the study is to investigate the effects of adding potassium thiocyanate (KSCN) to the sulfuric acid base solution during electrolytic hydrogenation using microalloyed martensitic AHSS grade S960MC. An increase in hydrogen diffusion into the examined material across its full surface is produced by adding thiocyanate ions to the electrolyte. This is the rationale behind the decision to add KSCN to the sulfuric acid base solution. The addition of KSCN to the base environment induced a considerable reduction in fracture strain, and the degradation was attributed to hydrogen buildup at grain boundaries, impurities and microcracks. These steels have an extensive list of applications in the automotive industry and are frequently used in the form of sheets for welding. Therefore, it is important to understand how their mechanical characteristics and behaviour vary in various circumstances, including hydrogen-rich environments. © 2024 Budapest University of Technology and Economics. All rights reserved.

关键词： Hydrogen embrittlement

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Annealing effect on the structural and optoelectronic properties of Cu-Cr-O thin films deposited by reactive magnetron sputtering using a single CuCr target

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materials science- Poland 2023年第1期41卷 191-201页

作者： Tsai, Du-Cheng Chen, Erh-Chiang Huang, Yen-Lin Shieu, Fuh-Sheng Chang, Zue-Chin Department of Materials Science and Engineering National Chung Hsing University Taichung402202 Taiwan Metal Industries Research and Development Centre Kaohsiung811225 Taiwan Department of Mechanical Engineering National Chin-Yi University of Technology Taichung411030 Taiwan

The aim of this study is to explore the structural and optoelectronic properties of Cu-Cr-O thin films when processed by the magnetron sputtering method using a single equimolar CuCr alloy target. These films were then post-annealed in a controlled Ar atmosphere at 500°C to 800°C for 2 h. The as-deposited Cu-Cr-O thin film consisted of an amorphous phase and exhibited extremely poor optoelectronic properties. After annealing was conducted at 500°C, monoclinic CuO and spinel CuCr2O4 phases were simultaneously formed in the film. Upon increasing the annealing temperature to 600°C, the CuCr2O4 phase reacted completely with the CuO phase and transformed into the delafossite CuCrO2 phase, possessing optimal optoelectronic performance. It has an electrical resistivity of 41 ω-cm and a light transmittance of 49.5%, making it suitable for p-type transparent conducting electrodes. A further increase in annealing temperature resulted in larger grains and greater surface roughness and void density, which, in turn, degraded the optoelectronic performance. © Du-Cheng Tsai et al., 2023 published by Sciendo 2023.

关键词： Thin films

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