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Robotics and Technologies for Industrial Automation (ROBOTHIA), IEEE International Conference on

作者： Saif Alahdal Nasr Abdalmanan Kamarulzaman Kamarudin Muhammad Aizat Abu Bakar Mohd Rizal Manan Ahmad Shakaff Ali Yeon Syed Muhammad Mamduh Faculty of Electrical Engineering & Technology Universiti Malaysia Perlis Arau Malaysia Center of Excellence for Advanced Sensor Technology Faculty of Electrical Engineering & Technology Universiti Malaysia Perlis Arau Malaysia Faculty of Electrical Engineering & Technology Universiti Malaysia Perlis Perlis Malaysia Center of Excellence for Advanced Sensor Technology Universiti Malaysia Perlis Arau Malaysia

ISBN: (数字)9798350356755

ISBN: (纸本)9798350356762

The field of mobile robotics has become increasingly significant in today's technology-driven world, with applications ranging from autonomous vehicles to automated delivery systems. This project aims to enhance the capabilities of mobile robots in navigating and exploring unfamiliar environments by developing and implementing a Reinforcement Learning (RL) model. The core objective is to enable these robots to autonomously explore, navigate, and adapt to new surroundings efficiently. By integrating the RL model into a mobile robot using the Robot Operating System (ROS), the project evaluates the system's efficiency through comprehensive ground experiments. The research compares the RL-based approach with established exploration methods, emphasizing the effectiveness of the Value Iteration algorithm, a dynamic programming algorithm for Markov Decision Processes (MDPs). Controlled experiments conducted in a 6×3 meter flat space with static obstacles and a 2D lidar sensor provide valuable insights into the RL model's performance and potential real-world applications. The findings highlight the advantages of the Value Iteration algorithm over traditional exploration methods, demonstrating its potential for improving autonomous robotic navigation and exploration.

关键词： Adaptation models Accuracy Service robots Heuristic algorithms Reinforcement learning Robot sensing systems Robustness Dynamic programming Mobile robots Robots

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Bioinspired heterogeneous N, S-codoped 3D carbon- CuWO₄@Ag nano-architecture from CuWO₄-spongin scaffold for boosting photocatalytic efficiency and cell viability

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Alexandria Engineering Journal 2025年 126卷 393-407页

作者： Rostami, Mojtaba Badiei, Alireza Fasihi-Ramandi, Mahdi Ehrlich, Hermann Jourshabani, Milad Lee, Byeong–Kyu Ziarani, Ghodsi Mohammadi Rahimi-Nasrabadi, Mehdi Department of Organic Chemistry Faculty of Chemistry Alzahra University Tehran Iran School of Chemistry College of Science University of Tehran Tehran Iran Molecular Biology Research Center Systems Biology and Poisoning Institute Baqiyatallah University of Medical Sciences Tehran Iran Center for Advanced Technology Adam Mickiewicz University Poznan61614 Poland Institute of Chemical Technology and Engineering Poznan University of Technology Berdychowo 4 Poznan60-965 Poland Department of Civil and Environment Engineering University of Ulsan Daehakro 93 Namgu Ulsan44610 Korea Republic of Center of Excellence in Electrochemistry School of Chemistry College of Science University of Tehran Tehran Iran Institute of Electronic and Sensor Materials TU Bergakademie Freiberg Freiberg09599 Germany

This study investigated the photodegradation process of Rhodamine B (RhB) and acetaminophen (ACE) using a novel N-S-codoped carbon microporous and three-dimensional (3D) architecture (NSC) derived from a spongin scaffold of poriferan origin. For the first time NSC-CuWO4 was synthesized by converting a ready to use 3D microfibrous spongin scaffold through co-precipitation and in-situ pyrolysis. Subsequently, silver nanoparticles (Ag NPs) were incorporated to create the NSC-CuWO4@Ag hybrid material. The 3D architectural morphology and N-S-codoping of the material provided advantages in terms of high charge-separation efficiency, charge transfer, mass transfer, and optical absorption during the photoreaction. Under visible-light irradiation, NSC-CuWO4@Ag hybrid nanomaterial demonstrated excellent photocatalytic efficiency, degrading over 91 % of ACE and 97 % of RhB within 30 minutes. The photochemical tests revealed that electrons generated by irradiated CuWO4@Ag material transferred to the NSC microporous structure, facilitating the reduction of O2 and the production of H2O2 in an aqueous environment. This process significantly boosted the photocatalytic activity of CuWO4. The MTT assay indicated that NSC-CuWO₄@Ag nanoparticles (NPs) showed the highest cell viability. This is attributed to the silver NPs, which enhance biocompatibility and reduce the cytotoxic effects associated with carbonized spongin-derived NSC. This hybrid nanocomposite demonstrates excellent biocompatibility, making it a promising candidate for biomedical applications that require minimal cellular toxicity. © 2025 The Authors

关键词： Photodegradation

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Intelligent triboelectric sliding bearing for gas leak self-sensing and mechanical fault self-diagnosis in green ammonia production

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Nano Energy 2025年 140卷

作者： Wang, Xingwei Gong, Likun Liu, Huanshuo Zhou, Xiaohong Center for Sensor Technology of Environment and Health School of Environment Tsinghua University Beijing100084 China National Engineering Research Center of Advanced Technology and Equipment for Water Environment Pollution Monitoring Changsha410205 China Shandong Qingdao266580 China

To address carbon neutrality and peak carbon emissions, harvesting mechanical energy from bearings and converting it into electrical energy to drive ammonia leakage alarm, as well as bearings’ mechanical fault self-diagnosis, is challenging yet highly demanded in the green ammonia production industry. Herein, we demonstrated an Intelligent Triboelectric Sliding Bearing (ITSB) system, featuring a free-standing rotary barrel-shaped triboelectric nanogenerator (TENG), a gallium oxide (Ga2O3)/MXene nanocomposite-based NH3 gas sensor and a self-driven data transmission unit. In addition to retaining the traditional load-bearing function, the free-standing rotary barrel-shaped TENG converted the friction from rotational motion into electrical energy, providing continuous power for sensing and data transmission. Low-cost Ga₂O₃/MXene composite was fabricated as a gas-sensitive film for NH3 using a combined hydrothermal synthesis and physical composite method. The composite film-based interdigitated electrode demonstrated a highly sensitive (65.7 % @2 ppm) and fast response (5 s@2 ppm) to NH3 gas with surface synergy effect performance confirmed through density functional theory calculations (DFT). Additionally, the self-driven data transmission unit were implemented to autonomously regulate and store the free-standing rotary barrel-shaped TENG output for sensing and mechanical operation monitoring. A neural network algorithm was developed to predict mechanical failures of bearings. By integrating on-site data, the accuracy reached 99 %. This integrated system paves a practical solution for gas sensing and mechanical fault diagnosis of bearings in green ammonia production for its sustainable and safe development. © 2025 Elsevier Ltd

关键词： Ammonia

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A Review on High Entropy Alloys as Metallic Biomaterials: Fabrication, Properties, Applications, Challenges, and Future Prospects

Biomedical Materials and Devices

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Biomedical Materials and Devices 2025年 1-30页

作者： Adhikari, Jaideep Saha, Prerona Mandal, Pritam Sinha, Sudip Kumar Seikh, Asiful H. Mohammed, Jabair A. Ghosh, Manojit School of Advanced Materials Green Energy and Sensor Systems Indian Institute of Engineering Science and Technology Shibpur Howrah 711103 India Department of Metallurgy and Materials Engineering Indian Institute of Engineering Science and Technology Shibpur Howrah 711103 India Department of Metallurgical and Materials Engineering National Institute of Technology Raipur 492010 India Center of Excellence for Research in Engineering Materials (CEREM) Deanship of Scientific Research King Saud University Riyadh 11421 Saudi Arabia

In recent years, designing alloys with diverse elements or high entropy alloys (HEAs) has received significant research interest for biomedical applications, particularly bone repair techniques that use materials with excellent strength and biocompatibility. This review paper transitions from the core HEA concept to factors influencing cell-material interactions. The application area for Bio-HEA was not only fixed to orthopaedic implants;prospects in photothermal, bioimaging, biosensors, and therapeutics have also been discussed. Another focus of this review is identifying suitable elements that can elucidate reduced toxicity with enhanced antimicrobial activity. Critical discussions on lowering elastic modulus techniques for bio-HEAs have been provided that mitigate stress-shielding effect-related implant rejection. Further, corrosion and wear resistance and their impact on cellular functions have been discussed. Synthesis of HEA as a bulk material and the nuances of HEA as a nanoparticle have been discussed along with high entropy-based other systems for biomedical applications. The review further delves into HEA composite fabrication and its applicability as a coating material. Concepts like strength-ductility trade-off, the impact of elemental alloy composition on corrosion and other physical properties, strengthening mechanism, and single-phase stability concepts were discussed in connection to the Bio-HEA. The paper concludes by identifying the present challenges limiting the clinical translation of HEAs and exploring future in-depth research directions involving computational modelling and advanced manufacturing to optimize HEAs for biomedical use further. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025.

关键词： Antimicrobial mechanism Bio-high entropy alloys Corrosion and wear resistance Implant host response

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Engineering design of feedstock powder and relevant thermal-mechanical performance of thermal/environmental barrier coatings

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Journal of advanced Ceramics 2025年第2期14卷 37-56页

作者： Xinchang Feng Fangwei Guo Lirong Luo Yuzhang Wang Yun Long Xiaofeng Zhao Fei Pan Lei Guo Qingfeng Zeng Jing Feng Chunlei Wan Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China National Engineering Research Center of Special Equipment and Power System for Ship and Marine Engineering Shanghai 200030China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Advanced Nuclear Energy Technology Nuclear Power Institute of ChinaChengdu 610213China Innovative Sensor Technology IST AG Ebnat-Kappel 9642Switzerland School of Materials Science and Engineering Tianjin UniversityTianjin 300072China Tianmushan Laboratory Hangzhou 311115China School of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

The development of aeroengine with a high thrust-weight ratio poses great challenges for current top-coating thermal barrier coatings (TBCs) and environmental barrier coatings (EBCs) in service. Medium/high-entropy ceramics are highly promising candidate material for advanced TBCs/EBCs owing to their low thermal conductivity, high melting point, high-temperature stability, and calcium–magnesium–alumino–silicate (CMAS) resistance. Most feedstock powder used for medium/high-entropy TBCs/EBCs is prepared via traditional spray drying, which cannot fully exploit the advantages of multicomponent ceramics. The density, sphericity, inner structure, and flowability of feedstock powder affect their melting state during the thermal spraying process, which strongly affects the microstructure and properties of the deposited coatings. Therefore, the deposited coatings exhibit phase segregation, amorphous phases, and microstructure defects owing to unpredictable variations in feedstock powder with random morphologies and structures. Here, the structure and properties of feedstock powder prepared by state-of-the-art granulation technologies and their influences on the deposited coatings were systematically investigated, which can provide guidance for configuration optimization of feedstock powder and the manufacturing accuracy of the deposited coating. This review aims to bridge the gap between cutting-edge ceramics and advanced engineering technologies, thus providing concrete background knowledge and crucial guidelines for designing and developing TBCs/EBCs.

关键词： thermal/environmental barrier coatings(TBCs/EBCs) spraying ceramic powder multiscale structure control high-entropy ceramics thermal-mechanical performance

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Effect of graphene quantum dot concentration on p-toluenesulfonic acid-doped polyaniline–graphene quantum dot nanocomposites: chemical, optical, and electrical characterization for benzo[def]phenanthrene detection

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Optical and Quantum Electronics 2025年第4期57卷 1-33页

作者： Beygisangchin, Mahnoush Jakmunee, Jaroon Rashid, Suraya Abdul Shafie, Suhaidi Saetang, Songpon Research Laboratory for Analytical Instrument and Electrochemistry Innovation Department of Chemistry Faculty of Science Chiang Mai University Chiang Mai50200 Thailand Research Laboratory On Advanced Materials for Sensor and Biosensor Innovation Materials Science Research Center and Center of Excellence for Innovation in Chemistry Faculty of Science Chiang Mai University Chiang Mai50200 Thailand Nanomaterials Processing and Technology Laboratory Institute of Nanoscience and Nanotechnology Universiti Putra Malaysia Serdang43400 Malaysia Faculty of Engineering Universiti Putra Malaysia Serdang43400 Malaysia

Monitoring of benzo[def]phenanthrene as a toxic component is essential for environmental assessment because of its adverse impact on human health and ecological systems. P-Toluenesulfonic acid-doped polyaniline (PANI) and PANI-graphene quantum dot (PANI-GQD) nanocomposites were fabricated by incorporating graphene quantum dot (GQD) concentrations between 100 and 500 ppm through oxidative chemical polymerization of aniline under acidic conditions at ambient temperature. The materials were analysed using Fourier transform infrared (FT-IR), field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), thermogravimetry analysis (TGA), UV–visible and photoluminescence (PL) spectroscopy, and electrical conductivity measurements. Key findings included significant shifts in FT-IR peaks (C=N stretching from 1651 to 1694 cm⁻1) and an increase in the AB/AP ratio from 0.27 to 0.333, indicating enhanced sp2 hybridization and improved electrical conductivity. XRD analysis showed improved molecular ordering in PANI-GQD nanocomposites. FE-SEM revealed changes in morphology from flat layers to spherical and flaky mixtures with increasing GQD concentrations. Film thickness increased from 13.52 μm (PANI-GQD-1) to 30.07 μm (PANI-GQD-5). The PANI-GQD-3 nanocomposite exhibited the lowest bandgap (2.39 eV) and the highest PL intensity because of enhanced energy transfer between PANI and GQD. Electrical conductivity decreased with increasing GQD concentration, with PANI-GQD-5 showing 2.17 (Ω cm)–1. PANI-GQD-3 successfully detected benzo[def]phenanthrene at concentrations ranging from 0.001 mol L⁻1 to 10 × 10⁻⁹ mol L⁻1 with a limit of detection of 1.5 × 10⁻⁹ mol L⁻1 through gas chromatography. Results demonstrated the potential of PANI-GQD nanocomposites for sensor and biosensor applications. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025.

关键词： Thermogravimetric analysis

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Recent progress in metal-organic frameworks(Part Ⅱ—material application)

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Science China Chemistry 2025年第5期68卷 1642-1702页

作者： Jiandong Pang Wentao Jiang Xue-Wen Zhang Hao-Long Zhou Yuxiu Sun Wei Gong Bin Wang Fuyin Ma Linwei He Long Chen Qiang Chen He-Qi Zheng Yuanjing Cui Wen-Jie Shi Chao Zhang Mei Wang Yue-Biao Zhang Jie-Peng Zhang Chongli Zhong Yong Cui Shuao Wang Jian-Rong Li Guodong Qian Tong-Bu Lu Huan Pang Xian-He Bu School of Materials Science and Engineering Nankai University School of Physical Science and Technology Shanghai Tech University MOE Key Laboratory of Bioinorganic and Synthetic Chemistry GBRCE for Functional Molecular EngineeringSchool of ChemistryIGCMESun Yat-sen University Department of Chemistry Shantou University School of Chemical Engineering and Technology Tiangong University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary SciencesSoochow University College of Materials Science & Engineering Beijing University of Technology State Key Laboratory of Silicon and Advanced Semiconductor Materials Cyrus Tang Center for Sensor Materials and ApplicationsSchool of Materials Science & EngineeringZhejiang University Institute for New Energy Materials and Low Carbon Technologies School of Materials Science and EngineeringTianjin University of Technology School of Chemistry and Chemical Engineering Yangzhou University

As a class of functional crystalline porous materials, metal-organic frameworks(MOFs) gained rapid development in the past three decades and a large number of MOFs with ordered structures, high surface areas, and functionalized channels have been investigated. MOFs and MOF-derived/composite materials show great potential in many application fields. In this review, we discussed the main applications of MOFs and MOF-derived/composite materials in small molecule storage, separation, luminescence, sensing, multitype catalysis, and energy storage. In addition, challenges and problems in the future research of MOFs-related fields are also discussed.

关键词： metal-organic frameworks storage and separation sensing and detection multitype catalysis energy storage

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Ferroelectric Spin-Orbit Valve Effect

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Physical Review Letters 2025年第7期134卷 076801-076801页

作者： L. L. Tao Mingbo Dou Xianjie Wang E. Y. Tsymbal School of Physics Harbin Institute of Technology Harbin 150001 China Heilongjiang Provincial Key Laboratory of Advanced Quantum Functional Materials and Sensor Devices Harbin 150001 China Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience University of Nebraska Lincoln Nebraska 68588-0299 USA

In ferroelectric (FE) semiconductors with strong spin-orbit coupling, the electron’s spin direction is locked to its momentum by an intrinsic spin-orbit field (SOF) switchable by ferroelectric polarization. This provides a promising platform for novel nonvolatile spintronic devices. Here, we propose exploiting the switchable SOF to realize a FE spin-orbit valve (FE-SOV), where two FE semiconductors are separated by a thin barrier layer. Because of the locking between the SOF and polarization direction, the conductance of the FE-SOV strongly depends on the relative orientation of polarization of the two FE semiconductors. Using a tight-binding model and density functional theory calculations for FE-SOVs based on two-dimensional FE SnTe and Bi, we demonstrate a giant FE-SOV effect that is characterized by the conductance change of several orders in magnitude. Our work enriches spin-orbit physics of ferroelectrics and proposes a new type of all-electric control of a nonvolatile spin-orbitronic device, which holds promise for future electronic and memory applications.

关键词： Spin orbit coupling

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Propagation properties and spatial-mode UWOC performance of quasi-perfect optical vortex beam in an improved oceanic channel

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Optics and Laser technology 2025年 188卷

作者： Xiao, Zhiwei Zhou, Jian Wang, Lin Liu, Guizhen Ding, Zhongjun State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Information Engineering Wuhan University of Technology Wuhan430070 China Hubei Key Laboratory of Broadband Wireless Communication and Sensor Networks Wuhan University of Technology Wuhan430070 China National Deep Sea Center Qingdao266237 China

In this study, the Quasi-perfect optical vortex (Quasi-POV) beam with topological charge-independence radial distribution is investigated to enhance the performance of underwater wireless optical communication (UWOC) system based on spatial modes. Additionally, the oceanic channel model is modified to obtain more reliable simulation results. The propagation and communication performance of perfect optical vortex (POV) beam and Quasi-POV beam are compared and analyzed through the modified model. With the optimization of beam's parameters, Quasi-POV beam achieves lower bit-error rate (BER) and higher average capacity in multiple phase shift keying (M−PSK) modulated UWOC system. The results indicate that Quasi-POV beam receives higher normalized intensity and lower crosstalk probability than the POV beam, the average simulation results for the three topologic charge cases show that the BER of Quasi-POV beam at 100 m reduced by approximately 52%, the average capacity of Quasi-POV beam increased by approximately 13.3%. The Quasi-POV beam has better performance than the POV beam in Spatial-Mode UWOC system according to the simulation results, which is more suitable for UWOC system based on spatial modes with smaller values of topologic charge. © 2025 Elsevier Ltd

关键词： Vortex flow

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Terahertz polarization modulator based on chiral metasurface integrated with vanadium dioxide

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Optics Letters 2025年第10期50卷 3345-3348页

作者： Li Luo Ling Zhou Yuxin Zou Jiaqi Yang Jiahui Huo Xu Yang Yuanyuan Lv Jingjing Bian Sui Peng Bo Liu Yudong Pan Jin He Jie Li Jianquan Yao Sichuan Province Key Laboratory of Optoelectronic Sensor Devices and Systems College of Optoelectronic Engineering (Chengdu IC Valley Industrial College) Chengdu University of Information Technology Chengdu 610225 China Sichuan Meteorological Optoelectronic Sensor Technology and Application Engineering Research Center Chengdu University of Information Technology Chengdu 610225 China Chengdu Advanced Metal Materials Industry Technology Research Institute Limited Company Chengdu 610300 China School of Precision Instruments and Opto-Electronics Engineering Tianjin University Tianjin 300072 China

Conventional optical polarization modulation depends on block birefringent devices, and currently there are still no commercial polarization modulation devices available for terahertz beams in free space. Metasurfaces present more opportunities for the manipulation of optical and terahertz waves, which are advantageous for highly efficient polarization modulation devices. In this paper, what we believe to be a new chiral metasurface for the polarization modulation of reflected terahertz waves is proposed that consists of vanadium dioxide (VO 2 ) combined with metal patterns for active chiral meta-atoms. Through electric stimulation, dynamic modulation of the polarization state can be achieved. The results indicate that the metasurface shows a strong circular dichroism at an operating frequency of 0.192 THz. In the insulating state, the absorption of the right-circularly polarized (RCP) wave is significantly higher than that of the left-circularly polarized (LCP) wave. By adjusting the transition state of VO 2 , the chirality of the structure is reduced, enabling the reflected wave to be switched from a circularly polarized state to a linearly polarized one. The absorption and polarization of terahertz wave can also be controlled by the incident angle. This method is anticipated to promote the development of terahertz communication and imaging technologies.

关键词： Chirality Circular polarization Femtosecond lasers Optical manipulation Reflection coefficient Terahertz imaging

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