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Transmittance contrast-induced photocurrent:A general strategy for self-powered photodetectors based on MXene electrodes

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InfoMat 2024年第5期6卷 47-57页

作者： Hailong Ma Huajing Fang Jiaqi Li Ziqing Li Xiaosheng Fang Hong Wang Center for Advancing Materials Performance from the Nanoscale(CAMP-Nano) State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong UniversityXi'anthe People's Republic of China Department of Materials Science Institute of OptoelectronicsFudan UniversityShanghaithe People's Republic of China Department of Materials Science and Engineering&Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices Southern University of Science and TechnologyShenzhenthe People's Republic of China

The regulation of carrier generation and transport by Schottky junctions enables effective optoelectronic conversion in optoelectronic devices.A simple and general strategy to spontaneously generate photocurrent is of great signifi-cance for self-powered photodetectors but is still being ***,we pro-pose that a photocurrent can be induced at zero bias by the transmittance contrast of MXene electrodes in MXene/semiconductor Schottky *** MXene electrodes with a large transmittance contrast(84%)between the thin and thick zones were deposited on the surface of a semiconductor wafer using a simple and robust solution *** probe force microscopy tests indicated that the photocurrent at zero bias could be attributed to asymmetric carrier generation and transport between the two Schottky junctions under *** a demonstration,the MXene/GaN ultraviolet(UV)photo-detector exhibits excellent performance superior to its counterpart without transmittance contrast,including high responsivity(81 mA W–1),fast response speed(less than 31 and 29 ms)and ultrahigh on/off ratio(1.33�106),and good UV imaging ***,this strategy has proven to be uni-versal for first-to third-generation semiconductors such as Si and *** results provide a facile and cost-effective route for high-performance self-powered photodetectors and demonstrate the versatile and promising applica-tions of MXene electrodes in optoelectronics.

关键词： GaN MXene Schottky junction self-powered photodetector transmittance contrast

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Killing two birds with one stone:Enhancing the photoelectrochemical water splitting activity and stability of BiVO_(4)by Fe ions association

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Chinese Chemical Letters 2024年第12期35卷 154-159页

作者： Hailang Deng Abebe Reda Woldu Abdul Qayum Zanling Huang Weiwei Zhu Xiang Peng Paul K.Chu Liangsheng Hu Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou UniversityShantou515063China Department of Mechanical Engineering Shantou UniversityGuangdong 515063China Hubei Key Laboratory of Plasma Chemistry and Advanced Materials School of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205China Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515063China Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongHong KongChina Shantou Huaxing Metallurgical Equipment Co. Ltd.Shantou 515063China

Bi VO_(4)is a promising semiconducting photoanode for photoelectrochemical(PEC)water splitting due to its suitable ***,the dissolution of V^(5+)and sluggish reaction kinetics at the surface in the oxygen evolution reaction(OER)limit its ***,we report a convenient strategy to change the microenvironment by adding Fe(Ⅲ)into the *** the PEC process,Fe(Ⅲ)ions not only improve the current density,but also show excellent stability toward Bi VO_(4).Consequently,the current increases by more than 1.7 times compared to that without Fe(Ⅲ).Photoelectrochemical,morphological,and structural characterizations reveal that the FeOOH co-catalyst produced in situ on the Bi VO_(4)photoanode by cyclical formation of the intermediates at the electrode/electrolyte interface during OER accelerates the OER kinetics and prevents photo-corrosion by suppressing the dissolution of V^(5+).The results reveal a new strategy for the multifunctional modification of photoanodes for efficient solar conversion.

关键词： Photoelectrochemical water splitting Bi VO_(4)photoanodes Fe(Ⅲ)ions Oxygen evolution reaction Dynamic changes

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Constructing the Al deficiency in Si-O(H)-Al units based on Pt/ZSM-5 for enhanced hydrocracking of polyethylene into high-quality liquid fuel

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Nano Research 2024年第11期17卷 10088-10098页

作者： Xia Zhong Jie Liu Li Gao Junnan Chen Xiyang Wang Ying Zhang Yimin A. Wu Mozaffar Shakeri Xia Zhang Bingsen Zhang Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China School of Materials Science and Engineering University of Science and Technology of China Shenyang 110016 China Department of Chemistry College of Science Northeastern University Shenyang 110819 China Department of Mechanical and Mechatronics Engineering Waterloo Institute for Nanotechnology University of Waterloo Waterloo Ontario N2L 3G1 Canada School of Petrochemical Engineering Liaoning Petrochemical University Fushun 113001 China Laboratory of Heterogeneous Catalysis Department of Chemical and Petroleum Engineering Chemistry and Chemical Engineering Research Center of Iran Tehran 16363 Iran

Hydrocracking catalysis is a controllable route to plastic waste upgrading. However, the mismatched acid site-driven C-C cleavage and C=C hydrogenation process on metal restrict the efficiency and selectivity in conventional metal/acid bi-functional catalyst. Herein, we introduce Al deficiency in Si-O(H)-Al structural units of Pt/zeolite socony mobil-5 (Pt/ZSM-5) through discharge driven reduction (DR) process to precisely control the ratio of metal to acid, achieving hydrocracking of low-density polyethylene (LDPE) waste at 270 °C with 87.7% conversion and liquid fuel (C5-C21) selectivity of 77.8%. Pair distribution function (PDF) and nuclear magnetic resonance (NMR) spectroscopy demonstrate the partial absent Al sites further resulting short-range local disorder Si-O(H)-Al. Upon pyridine infrared spectroscopy (Py-IR) and CO diffuse reflectance Fourier-transform infrared (CO DRIFT) analysis, the extraction of Al modulates Brønsted acid density of Pt/ZSM-5 with DR process (Pt/Z5DR), improves the interaction between Pt and ZSM-5 support, enhances the cationic of Pt. The metal-acid balance and electron-deficient Pt favor the matching speed of light olefins hydrogenation and the cracking of macromolecule intermediates. Moreover, density functional theory (DFT) calculations identify the thermodynamic stability of Pt/Z5DR and moderate adsorption capability towards light olefins. This work confirms the great potential of precisely controlled molar of metal to acid in metal/zeolite catalysts for LDPE upcycling, providing a viable path for dealing with PE plastic wastes.

关键词： plastic upcycling hydrocracking low-density polyethylene liquid fuel Pt zeolites

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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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Recent Advances of Metal-Organic Frameworks and Derivatives for Rechargeable Aluminum Batteries

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SusMat 2025年第1期5卷 38-58页

作者： Dan-Yang Wang Hong-Han Choo Erhai Hu Jinxuan Song Afriyanti Sumboja Ivandini T.Anggraningrum Anne Zulfia Syahrial Qingyu Yan School of Material Science and Engineering Nanyang Technological UniversitySingaporeSingapore Material Science and Engineering Research Group Faculty of Mechanical and Aerospace EngineeringInstitut Teknologi BandungBandungIndonesia Department of Chemistry University of IndonesiaDepokIndonesia Metallurgical&Materials Engineering Department Fakultas Teknik Universitas IndonesiaKampus UIDepokIndonesia

In light of cost-effectiveness,high volumetric capacity,and abundant supplies on Earth of aluminum metal,the rechargeable aluminum battery(RAB)represents a cutting-edge alternative for energy storage *** have achieved significant progress as a result of tireless efforts;however,challenges like as expensive ionic liquid electrolytes,a restricted voltage window of aqueous electrolytes,corroded anode,and rapid capacity degradation limit their practical *** terms of increasing RABmileage,electrode materials can be regarded as the foundation of battery ***-organic frameworks(MOFs),which have customizable topologies,multiple active sites,and various metal centers and ligands,are promising electrode ***,for the first time,we deliver in detail the recent advancement ofMOFs in *** relationship on structure-properties-performance of MOFs is thoroughly *** and MOF-derived electrode materials are first *** aluminum sulfur/selenium batteries,MOF can serve as a host to capture the sulfides or ***,the MOF as catalysts for aluminum-air batteries are *** we focused on the challenges and opportunities that RABs would face in the future,and some prospects are *** believe this account will facilitate the exploration of MOFs in RABs and give more inspiration for discovering advanced RABs.

关键词： aluminum batteries metal-organic frameworks performance structures

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Application of a Self-Assembly Sensing Layer to Grating Sensor Cabinets for Biomedical Sensing of Rheumatoid Arthritis Antigen-Antibodies

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IEEE Sensors Journal 2024年第7期24卷 10039-10047页

作者： Wen, Hsin-Yi Hsu, Hsiang-Cheng Feng, Wen-Kai Jhan, Kai-Siang Yeh, Yao-Tsung Chiang, Chia-Chin National Kaohsiung University of Science and Technology Department of Chemical and Materials Engineering Kaohsiung80778 Taiwan National Kaohsiung University of Science and Technology College of Maritime Department of Ph.D. Program in Maritime Science and Technology Kaohsiung807618 Taiwan National Kaohsiung University of Science and Technology Department of Mechanical Engineering Kaohsiung80778 Taiwan Fooyin University Department of Medical Laboratory Science and Biotechnology Kaohsiung83102 Taiwan

In this article, we harnessed biomedical applications in laser-assisted etching long-period fiber gratings (LLPFGs) sensors, subsequently deploying them within the realm of biomedical applications. The primary aim of this study was to devise a sensitive method for the detection of antigen-antibodies associated with rheumatoid arthritis (RA) using LLPFGs. Sensing the antigen binding took place on the surface of the optical fiber through a self-assembling process. Given the inherent limitations of conventional rheumatoid factor (RF) testing in terms of specificity, we introduced an innovative serum-based approach geared toward the identification of anti-cyclic citrullinated peptide (Anti-CCP) antibodies. This method exhibited an impressive diagnostic accuracy rate of approximately 80% for RA cases, coupled with an exceptional specificity level of 98% for individuals without RA. The incorporation of LLPFGs in the detection of RA antigen-antibodies presents a highly promising avenue for enhancing the precision and reliability of RA diagnosis. Furthermore, this research aligns closely with the United Nations Sustainable Development Goal (SDG)3, which strives to promote well-being across all age groups and advance sustainable development by addressing health-related challenges, including the accurate diagnosis of diseases like RA. © 2023 IEEE.

关键词： Antibodies

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Topography Modeling of Surface Grinding Based on Random Abrasives and Performance Evaluation

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Chinese Journal of mechanical engineering 2024年第5期37卷 126-148页

作者： Yanbin Zhang Peng Gong Lizhi Tang Xin Cui Dongzhou Jia Teng Gao Yusuf Suleiman Dambatta Changhe Li Key Lab of Industrial Fluid Energy Conservation and Pollution Control Qingdao University of TechnologyMinistry of EducationQingdao 266520China School of Materials Science and Engineering Xi’an University of TechnologyXi’an 710048China College of Mechanical Engineering and Automation Liaoning University of TechnologyJinzhou 121001China Mechanical Engineering Department Ahmadu Bello UniversityZaria 810106Nigeria

The surface morphology and roughness of a workpiece are crucial parameters in grinding *** prediction of these parameters is essential for maintaining the workpiece’s surface ***,the randomness of abrasive grain shapes and workpiece surface formation behaviors poses significant challenges,and accuracy in current physical mechanism-based predictive models is *** address this problem,by using the random plane method and accounting for the random morphology and distribution of abrasive grains,this paper proposes a novel method to model CBN grinding wheels and predict workpiece surface ***,a kinematic model of a single abrasive grain is developed to accurately capture the three-dimensional morphology of the grinding ***,by formulating an elastic deformation and formation model of the workpiece surface based on Hertz theory,the variation in grinding arc length at different grinding depths is ***,a predictive model for the surface morphology of the workpiece ground by a single abrasive grain is *** model integrates the normal distribution model of abrasive grain size and the spatial distribution model of abrasive grain positions,to elucidate how the circumferential and axial distribution of abrasive grains influences workpiece surface ***,by integrating the dynamic effective abrasive grain model,a predictive model for the surface morphology and roughness of the grinding wheel is *** examine the impact of changing the grit size of the grinding wheel and grinding depth on workpiece surface roughness,and to validate the accuracy of the model,experiments are *** indicate that the predicted three-dimensional morphology of the grinding wheel and workpiece surfaces closely matches the actual grinding wheel and ground workpiece surfaces,with surface roughness prediction deviations as small as 2.3%.

关键词： Surface topography prediction Grinding Grinding wheel model Random plane method

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Ultrahigh Energy and Power Density in Ni-Zn Aqueous Battery via Superoxide-Activated Three-Electron Transfer

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Nano-Micro Letters 2025年第4期17卷 63-76页

作者： Yixue Duan Bolong Li Kai Yang Zheng Gong Xuqiao Peng Liang He Derek Ho School of Mechanical Engineering State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground EngineeringSichuan UniversityChengdu 610065People’s Republic of China Department of Materials Science and Engineering City University of Hong KongKowloonHong Kong 999077People’s Republic of China Hong Kong Centre for Cerebro-Cardiovascular Health Engineering Hong Kong Science ParkHong Kong 999077People’s Republic of China School of Mechanical Engineering Sichuan UniversityChengdu 610065People’s Republic of China

Aqueous Ni-Zn microbatteries are safe,reliable and inexpensive but notoriously suffer from inadequate energy and power ***,we present a novel mechanism of superoxide-activated Ni substrate that realizes the redox reaction featuring three-electron transfers(Ni↔Ni3+).The superoxide activates the direct redox reaction between Ni substrate and KNiO_(2)by lowering the reaction Gibbs free energy,supported by in-situ Raman and density functional theory *** prepared chronopotentiostatic superoxidation-activated Ni(CPS-Ni)electrodes exhibit an ultrahigh capacity of 3.21 mAh cm^(-2)at the current density of 5 mA cm^(-2),nearly 8 times that of traditional one-electron processes *** under the ultrahigh 200 mA cm^(-2)current density,the CPS-Ni electrodes show 86.4%capacity retention with a Columbic efficiency of 99.2%after 10,000 *** CPS-Ni||Zn microbattery achieves an exceptional energy density of 6.88 mWh cm^(-2)and power density of 339.56 mW cm^(-2).Device demonstration shows that the power source can continuously operate for more than 7 days in powering the sensing and computation intensive practical application of photoplethysmographic waveform *** work paves the way to the development of multi-electron transfer mechanisms for advanced aqueous Ni-Zn batteries with high capacity and long lifetime.

关键词： Superoxide Multiple electron transfer Ni aqueous battery AIoT power source Wearable health monitoring

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Atmospheric clearing of solid-particle debris using femtosecond filaments

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Physical Review Applied 2024年第1期22卷 014075-014075页

作者： Kyle S. Latty Kyle C. Hartig Nuclear Engineering Program Department of Materials Science and Engineering

Through nonlinear self-focusing, femtosecond pulses can propagate several kilometers beyond diffraction limits, forming an ionization channel in air known as a laser filaments. It has been demonstrated that in the wake of the filament, aerosols can be effectively cleared to improve the transmission of subsequent laser pulses or secondary light sources, pertinent to applications in atmospheric sensing. However, the current understanding of aerosol clearing is founded on interactions with droplets to simulate fogs and clouds and thus does not extend to solid particles or atmospheric debris. Using optical trapping, we isolate both graphite and silica microparticles and directly measure the subsequent displacement caused by the filament using time-resolved shadowgraphy. The shock wave from the filament is demonstrated to propel particles away from the filament, directly contributing to atmospheric debris clearing. Particles exposed to the laser light in either the intense filament core or the surrounding energy reservoir are axially displaced along the beam path. It is found that the optomechanical properties of the particle largely influence the axial displacement induced by laser exposure through mechanisms such as radiation pressure, mass ejection from ablation or optical damage, and particle deagglomeration.

关键词： Atmospheric science Light-matter interaction Microparticles Self-focusing Shock waves & discontinuities in plasma Aerosols Femtosecond laser irradiation Optical tweezers

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MODEL, GUESS, CHECK: Wordle as a primer on active learning for materials research

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npj Computational materials 2022年第1期8卷 937-939页

作者： Keith A.Brown Department of Mechanical Engineering Physics Departmentand Division of Materials Science&EngineeringBoston UniversityBostonMAUSA

Research and games both require the participant to make a series of *** learning is a process borrowed from machine learning for algorithmically making choices that has become increasingly used to accelerate materials *** this process may seem opaque to researchers outside the field of machine learning,examining active learning in games provides an accessible way to showcase the process and its ***,we examine active learning through the lens of the game Wordle to both explain the active learning process and describe the types of research questions that arise when using active learning for materials research.

关键词： Wordle learning outside

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