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Deep learning approaches for instantaneous laser absorptance prediction in additive manufacturing

npj Computational materials 2024年第1期10卷 3210-3222页

作者： Runbo Jiang John Smith Yu-Tsen Yi Tao Sun Brian J.Simonds Anthony D.Rollett Department of Materials Science and Engineering Carnegie Mellon UniversityPittsburghPA 15213USA Department of Materials Science and Engineering University of VirginiaCharlottesvilleVA 22904USA Applied Physics Division National Institute of Standards and TechnologyBoulderCO 80305USA NextManufacturing Center Carnegie Mellon UniversityPittsburghPA 15213USA

The quantification of absorbed light is essential for understanding laser-material interactions and melt pool dynamics in order to minimize defects in additively manufactured metal *** geometry of a vapor depression formed during laser melting is closely related to laser energy *** relationship has been observed by the state-of-the-art in situ high-speed synchrotron X-ray visualization and integrating sphere *** two techniques create a temporally resolved dataset consisting of vapor depression images and corresponding laser *** this work,we propose two different approaches to predict instantaneous laser *** end-to-end approach uses deep convolutional neural networks to learn implicit features of X-ray images automatically and predict the laser energy *** two-stage approach uses a semantic segmentation model to engineer geometric features and predict absorptance using classical regression *** having distinct advantages,both approaches achieved a consistently low mean absolute error of less than 3.3%.

关键词： additive prediction Deep

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Ultrahigh-power electrochemical double-layer capacitors based on structurally integrated 3D carbon tube arrays

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Nano Research 2023年第11期16卷 12849-12854页

作者： Fangming Han Guowen Meng Dou Lin Gan Chen Shiping Zhang Ou Qian Xiaoguang Zhu Bingqing Wei Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and NanotechnologyInstitute of Solid State PhysicsHefei Institute of Physical ScienceChinese Academy of SciencesHefei 230031China Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China Department of Mechanical Engineering University of DelawareNewarkDE 19716USA

The rational design of electrodes is the key to achieving ultrahigh-power performance in electrochemical energy storage ***,we have constructed well-organized and integrated three-dimensional(3D)carbon tube(CT)grids(3D-CTGs)using a 3D porous anodic aluminum oxide template-assisted method as electrodes of electrical double-layer capacitors(EDLCs),showing excellent frequency response *** unique design warrants fast ion migration channels,excellent electronic conductivity,and good structural *** study achieved one of the highest carbon-based ultrahigh-power EDLCs with the 3D-CTG electrodes,resulting in ultrahigh power of 437 and 1708 W·cm−3 with aqueous and organic electrolytes,*** constructed with these electrodes would have important application prospects in the ultrahigh-power *** rational design and fabrication of the 3D-CTGs electrodes have demonstrated their capability to build capacitors with ultrahighpower performance and open up new possibilities for applications requiring high-power output.

关键词： ultrahigh-power double-layer capacitor structurally integrated three-dimensional(3D)carbon tube smooth ion migration channels

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Persistent scintillators for X-ray repetitive imaging with stable energy traps

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Journal of Rare Earths 2025年第6期43卷 1161-1168页

作者： Wang, Yuan Zhang, Peng Tian, Xu Liu, Daiyuan Zhang, Jian Liu, Zhichao Yang, Xiuxia Yu, Jie Shao, Jianxiong Xu, Xuhui Yunnan Joint International Laboratory of Optoelectronic Materials and Devices Faculty of Materials Science and Engineering Kunming University of Science and Technology Kunming650093 China Department of Modern Physics Lanzhou University Lanzhou730000 China

Scintillator is a key material for the development of X-ray detectors, which has a promising application in medical imaging, security inspection and industrial non-injury detection. The majority of scintillators currently used in imaging are real-time imaging scintillators, which can cause ionization radiation damage to biological subjects or detection equipment during the imaging process and require complex, highly sensitive detection systems. Therefore, exploring stable, environmentally friendly scintillator materials that can achieve delayed imaging is of significance in the field of imaging. Herein, we developed an X-ray time-lapse imaging scintillator, Sr2Al6O11:Dy3+ phosphor, which generates stable traps by X-ray irradiation, thus endowing it with excellent persistent luminescence and information storage properties (>42 d). Moreover, traps constructed by X-ray can be repeatedly refilled (>40 times) under UV light and carriers are released in the form of mechanical or thermal excitation when refilling is complete. By constructing the traps in the phosphor during X-ray excitation and using it for repetitive imaging, the detection limit is 74.78 nGy/s, and the spatial imaging resolution is as high as 16 lp/mm. This discovery provides a new idea for the development of time-delayed X-ray scintillator. © 2025

关键词： X ray detectors

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Dual elemental doping activated signaling pathway of angiogenesis and defective heterojunction engineering for effective therapy of MRSA-infected wounds

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Bioactive materials 2024年第7期37卷 14-29页

作者： Jin Huang Shuilin Wu Yi Wang Jie Shen Chaofeng Wang Yufeng Zheng Paul K.Chu Xiangmei Liu Biomedical Materials Engineering Research Center Hubei Key Laboratory of Polymer MaterialsMinistry-of-Education Key Laboratory for the Green Preparation and Application of Functional MaterialsSchool of Materials Science&EngineeringHubei UniversityWuhan430062China Shenzhen Key Laboratory of Spine Surgery Department of Spine SurgeryPeking University Shenzhen HospitalShenzhen518036China School of Health Science&Biomedical Engineering Hebei University of TechnologyTianjin300401China School of Materials Science&Engineering Peking UniversityBeijing100871China Department of Physics and Department of Materials Science and Engineering City University of Hong Kong999077China

Multi-drug resistant bacterial infections pose a significant threat to human ***,the development of effective bactericidal strategies is a pressing *** this study,a ternary heterostructure(Zn-CN/P-GO/BiS)comprised of Zn-doped graphite phase carbon nitride(g-C3N4),phosphorous-doped graphene oxide(GO)and bismuth sulphide(Bi_(2)S_(3))is constructed for efficiently treating methicillin-resistant Staphylococcus aureus(MRSA)-infected *** doping-induced defect sites in g-C_(3)N_(4) results in a reduced band gap(ΔE)and a smaller energy gap(ΔEST)between the singlet state S_(1) and triplet state T_(1),which favours two-photon excitation and accelerates electron ***,the formation of an internal electric field at the ternary heterogeneous interface optimizes the charge transfer pathway,inhibits the recombination of electron-hole pairs,improves the photodynamic effect of g-C3N4,and enhances its catalytic ***,the Zn-CN/P-GO/BiS significantly augments the production of reactive oxygen species and heat under 808 nm NIR(0.67 W cm^(-2))irradiation,leading to the elimination of 99.60%±0.07%MRSA within 20 ***,the release of essential trace elements(Zn and P)promotes wound healing by activating hypoxia-inducible factor-1(HIF-1)and peroxisome proliferator-activated receptors(PPAR)signaling *** work provides unique insight into the rapid antibacterial applications of trace element doping and two-photon excitation.

关键词： Methicillin-resistant Staphylococcus aureus Defective heterojunction engineering Wound healing Phototherapy Signaling pathways

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Investigation of heavy particle radioactivity and spontaneous fission of even-Z superheavy nuclei

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Chinese physics C 2025年第4期49卷 77-89页

作者： Kirandeep Sandhu Gurjit Kaur Manoj K.Sharma p.7.department of physics 7.s.s.4.7.s khalsa college patialapunjabindia department of physics and materials science thapar institute of engineering and technologypatiala-147004punjabindia

The preformed cluster model(PCM)is applied to investigate the heavy particle radioactivity(HPR)and spontaneous fission(SF)processes for even-Z superheavy nuclear *** proximity potentials are used to calculate the decay half-lives of Z=112-120 *** fragmentation potential and preformation distribution suggest that SF is the major contributor up to Z=114,and HPR starts competing for heavier *** heavy cluster emission is supported by Pb-magicity,whereas SF is reinforced owing to the deformations of fission *** heavy cluster decay half-lives(log_(10)T_(C))are calculated using the PCM and are compared with the estimates of the analytical super asymmetric fission(ASAF)*** calculated log_(10)T_(C) values agree well with the ASAF measurements when using the Prox-00 and Mod Prox-00 versions of ***,Prox-77,Prox-88,and Prox-BW-91 are not appropriate to address the log_(10)T_(C) for Z≥116 *** resolve this,we include Z-dependence in the radius ***,the half-lives match the ASAF data after the inclusion of *** branching ratios are also calculated for superheavy nuclei and compared with the estimates of unified description(UD)formula,universal curve(UNIV),universal decay law(UDL),Horoi formula,and ASAF ***,the SF half-lives(T_(SF))of ^(282) Cn,^(284)Cn,^(284)Fl,and ^(286)Fl superheavy nuclei are estimated through various proximity *** them,Prox-oo is appropriate for addressing the experimental *** this potential,the SF half-lives are estimated through the PCM for Z=116-120 isotopes at different necklength ***,the scaled total kinetic energy(TKE)values are compared with the available data.

关键词： heavy particle radioactivity preformed cluster model ground state decay

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Non-planar dielectrics derived thermal and electrostatic field inhomogeneity for boosted weather-adaptive energy harvesting

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National science Review 2023年第9期10卷 248-257页

作者： Yi Zhou Tianpeng Ding Yin Cheng Yi Huang Wu Wang Jianmin Yang Lin Xie Ghim Wei Ho Jiaqing He Shenzhen Key Laboratory of Thermoelectric Materials and Department of Physics Southern University of Science and Technology Department of Electrical and Computer Engineering National University of Singapore School of Electronic Science and Engineering State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of China Department of Materials Science and Engineering National University of Singapore Institute of Materials Research and Engineering Agency for ScienceTechnology and Research (A*STAR) GuangdongHong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices Southern University of Science and Technology

Weather-adaptive energy harvesting of omnipresent waste heat and rain droplets,though promising in the field of environmental energy sustainability,is still far from practice due to its low electrical output owing to diele ctric structure irrationality and *** we present atypical upcycling of ambient heat and raindrop energy via an all-in-one non-planar energy harvester,simultaneously increasing solar pyroelectricity and droplet-based triboelectricity by two-fold,in contrast to conventional *** delivered non-planar dielectric with high transmittance confines the solar irradiance onto a focal hotspot,offering transverse thermal field propagation towards boosted inhomogeneous polarization with a generated power density of 6.1 mW m-2at 0.2 ***,the enlarged lateral surface area of curved architecture promotes droplet spreading/separation,thus travelling the electrostatic field towards increased *** enhanced pyroelectric and triboelectric outputs,upgraded with advanced manufacturing,demonstrate applicability in adaptive sustainable energy harvesting on sunny,cloudy,night,and rainy *** findings highlight a facile yet efficient strategy,not only for weather-adaptive environmental energy recovery but also in providing key insights for spatial thermal/electrostatic field manipulation in thermo electrics and ferroelectrics.

关键词： non-planar dielectrics heat manipulation pyroelectrics weather-adaptive energy harvesting

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Highly uniform Co-Cu bimetallic sulfides for rechargeable alkaline aqueous zinc batteries

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Chinese Chemical Letters 2024年第2期35卷 521-526页

作者： Xiaofang Bai Yuwei Zhao Mangwei Cui Tianshuo Guo Zijie Tang Chuan Li Heng Gao Shuo Yang Lingzhi Zhao Chunyi Zhi Hongfei Li Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Songshan Lake Materials Laboratory Dongguan 523808China Department of Materials Science and Engineering City University of Hong KongHong KongChina International Centre for Quantum and Molecular Structures Department of PhysicsShanghai UniversityShanghai 200444China Guangdong Provincial Engineering Technology Research Center for Low Carbon and Advanced Energy Materials Institute of Semiconductor Science and TechnologySouth China Normal UniversityGuangzhou 510631China

Rechargeable alkaline aqueous zinc batteries(RAZBs)have attracted increasing ***,most RAZBs are hindered by the limited availability of cathode *** practical electrochemical performance of most cathode materials is lower than the theoretical value due to their poor electrical conductivity and low utilization *** this work,we develop a facile hydrothermal procedure to prepare highly uniform bimetallic sulfides as novel cathode materials for ***-cobalt binary metallic oxides materials possess higher conductivity and larger capacity compared with their mono-metal oxides compounds due to bimetallic synergistic effects and multiple oxidation ***,bimetallic sulfide compounds have smaller bond energy and longer bond length than their oxides,leading to less structural damage,faster kinetics of electrochemical reactions,and better *** as-prepared Co-Cu bimetallic sulfides show enhanced electrochemical performance due to various valences of Co and Cu as well as the existence of *** a result,aqueous Zn/CuCo_(2)S_(4) battery shows a high specific capacity of 117.4 mAh/g at 4 A/g and a good cycle life of over 8000 *** on PANa hydrogel electrolytes,a flexible Zn/CuCo_(2)S_(4) battery demonstrates excellent cycling *** battery can also meet the requirements of electronic devices with different shapes and performs well in extreme environments,such as freezing,drilling,and *** work opens new avenues to obtain high-rate and long-life cathode materials for RAZBs by utilizing the synergistic effects of bimetallic sulfides and provides a new platform for flexible energy storage devices.

关键词： Aqueous zinc batteries Bimetallic sulfides Cathode materials Rate performance Cycling stability

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Rapid detection and good anti-humidity performance of resistive n-propanol gas sensor based on an ordered open porous ZnSnO3/ZnO heterostructures

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Ceramics International 2025年第14期51卷 18753-18761页

作者： Du, Liyong Yang, Guoli Liu, Yi Department of Materials and Chemical Engineering Taiyuan University Taiyuan030032 China Department of Chemistry and Chemical Engineering Jinzhong University China Department of Physics School of Science Hainan University Haikou570228 China

The research on the synthesis of three-dimensional (3D) porous structures has garnered significant interest among scholars. In this study, ZnSnO3/ZnO heterostructures are prepared using butterfly wings as biotemplates, resulting in the formation of a hierarchical porous network structure characterized by regular ridges and pillars. Subsequently, we construct a resistive gas sensor utilizing these ZnSnO3/ZnO heterostructures, which exhibits not only a relatively high responses (14.7) but also rapid response and recovery speed (1 s/6 s) when exposed to 100 ppm n-propanol at 220 °C. Furthermore, the sensor demonstrates a low limit of detection (LOD) of 432 ppb, strong repeatability, good long-term stability (80 days), and excellent anti-humidity properties (S84 %/S33 % ≈ 0.84). The enhanced gas sensing performance is primarily attributed to the formation of ZnSnO3/ZnO n-n heterostructures, the increase in oxygen vacancies, and the presence of ordered open porous structures. Consequently, ZnSnO3/ZnO heterostructures show significant potential for the detection of n-propanol gas in practical applications. This work also presents a promising strategy for the development of homogeneous/heterogeneous materials with a 3D open porous structure, which can be applied in surface-related fields. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Chemical sensors

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Quantized anomalous Hall resistivity achieved in molecular beam epitaxy-grown Mn Bi2Te4 thin films

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National science Review 2024年第2期11卷 24-32页

作者： Yunhe Bai Yuanzhao Li Jianli Luan Ruixuan Liu Wenyu Song Yang Chen Peng-Fei Ji Qinghua Zhang Fanqi Meng Bingbing Tong Lin Li Yuying Jiang Zongwei Gao Lin Gu Jinsong Zhang Yayu Wang Qi-Kun Xue Ke He Yang Feng Xiao Feng State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Institute of Physics Chinese Academy of Sciences School of Materials Science and Engineering Tsinghua University Beijing Academy of Quantum Information Sciences Frontier Science Center for Quantum Information Hefei National Laboratory Southern University of Science and Technology

The intrinsic magnetic topological insulator MnBi2Te4provides a feasible pathway to the high-temperature quantum anomalous Hall（QAH） effect as well as various novel topological quantum phases. Although quantized transport properties have been observed in exfoliated MnBi2Te4thin flakes, it remains a big challenge to achieve molecular beam epitaxy（MBE）-grown MnBi2Te4thin films even close to the quantized regime. In this work, we report the realization of quantized anomalous Hall resistivity in MBE-grown MnBi2Te4thin films with the chemical potential tuned by both controlled in situ oxygen exposure and top gating. We find that elongated post-annealing obviously elevates the temperature to achieve quantization of the Hall resistivity, but also increases the residual longitudinal resistivity, indicating a picture of high-quality QAH puddles weakly coupled by tunnel barriers. These results help to clarify the puzzles in previous experimental studies on MnBi2Te4and to find a way out of the big difficulty in obtaining MnBi2Te4samples showing quantized transport properties.

关键词： intrinsic magnetic topological insulator quantized anomalous Hall resistivity molecular beam epitaxy quantized transport property

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Porous FeP/FeO Deposited on Carbon Cloth with Accelerated Kinetics for the Hydrogen Evolution Reaction

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Journal of Wuhan University of Technology(materials science) 2024年第6期39卷 1434-1439页

作者： YU Hai ZHAO Yujia LIU Su ZUO Lei LEI Qianqian HU Ruiling LU Jianguo ZHAO Min WANG Congrong WANG Cunyong ZHANG Miao YANG Lei ZHONG Jin CAO Chunbin School of Physics and Materials Engineering and Key Laboratory for Photoelectric Detection Science and Technology of Education Department of Anhui Province Hefei Normal UniversityHefei 230601China School of Physics and Material Science Anhui UniversityHefei 230039China Department of Chemistry and Materials Engineering Hefei UniversityHefei 230601China School of Computer Science and Technology Hefei Normal UniversityHefei 230601China School of Science Anhui Agricultural UniversityHefei 230036China

FeP/FeO was prepared on carbon cloth(CC)via hydrothermal method,heat treatment in air,and phosphorization in ***/FeO/CC presents a porous and loose morphology which is conducive to the exposure of active sites and the transfer of ***/FeO/CC requires the low overpotentials of 257 and 117 mV(*** hydrogen electrode(RHE))to achieve the current density of 10 mA_·cm^(-2)for oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)in alkaline KOH solution,*** small Tafel slope values of 36.1 mV_·dec^(-1)(for OER)and 96.2 mV_·dec^(-1)(for HER)indicate that FeP/FeO/CC exhibits the fast electrocatalytic reactive kinetics for OER and *** particular,the reaction kinetics of FeP/FeO/CC accelerated with the progress of *** charge-transfer resistance(R_(ct))of FeP/FeO/CC is only 11Ω.Excellent bifunctional electrocatalytic performances of FeP/FeO/CC should be attributed to the porous morphology and the lower charge-transfer resistance.

关键词： FeP/FeO/CC OER HER water splitting

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