Applied Surface Science最新文献_第10页

Substrate-mediated interactions in borophene nanoribbon systems: implications for lithium storage applications 硼罗芬纳米带系统中基质介导的相互作用：对锂存储应用的影响

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-07-12 DOI: 10.1016/j.apsusc.2025.164052

Junyu Fan , Jingyi Xiao , Haibo Wang , Xiaoqing Liang , Xiaojie Li , Xiaowei Yang , Nan Gao

{"title":"Substrate-mediated interactions in borophene nanoribbon systems: implications for lithium storage applications","authors":"Junyu Fan , Jingyi Xiao , Haibo Wang , Xiaoqing Liang , Xiaojie Li , Xiaowei Yang , Nan Gao","doi":"10.1016/j.apsusc.2025.164052","DOIUrl":"10.1016/j.apsusc.2025.164052","url":null,"abstract":"<div><div>Borophene nanoribbons (BNRs), one-dimensional nanostructures recently synthesized through advanced fabrication techniques, demonstrate significantly enhanced quantum confinement effects relative to their two-dimensional analogues. Through systematic first-principles calculations, we comprehensively investigate the interfacial interactions between BNRs and five distinct metal substrates: Ag(1 1 1), Au(1 1 1), Cu(1 1 1), Al(1 1 1), and Ir(1 1 1). Multiple characterization metrics, including binding energies, electronic band structures, local density of states, electron localization function, and electrostatic potential analysis, are employed to elucidate the fundamental interfacial properties of BNRs/metal hybrid systems. Our computational results reveal that Au and Cu substrates favor the epitaxial growth of BNRs and maintain lower interfacial tunneling barriers. Simulated scanning tunneling microscopy images for these BNRs provide direct experimental validation criteria. Furthermore, in lithium-ion battery applications, these BNR-based systems demonstrate strong lithium adsorption capabilities with binding energies ranging from −0.97 to −1.32 eV and exhibit low diffusion energy barriers across multiple pathways, with respective value of 0.36 eV and 0.41 eV for Au-supported and Ir-supported systems. This study not only provides critical theoretical guidance for the controlled synthesis of BNRs but also highlights their promising potential as advanced electrode materials for rechargeable energy storage systems.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"711 ","pages":"Article 164052"},"PeriodicalIF":6.3,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144612789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Porous Na3V2(PO4)3 enwrapped by dual carbon substrate from phenol formaldehyde with superior electrochemical performance 酚醛双碳包覆多孔Na3V2(PO4)3具有优异的电化学性能

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-07-12 DOI: 10.1016/j.apsusc.2025.164058

Hongen Shi , Siyuan Li , Yanru Huo , Shuli Li , Kaiyue Hua , Zeheng Liu , Yanzhong Wang , Yanjun Chen

{"title":"Porous Na3V2(PO4)3 enwrapped by dual carbon substrate from phenol formaldehyde with superior electrochemical performance","authors":"Hongen Shi , Siyuan Li , Yanru Huo , Shuli Li , Kaiyue Hua , Zeheng Liu , Yanzhong Wang , Yanjun Chen","doi":"10.1016/j.apsusc.2025.164058","DOIUrl":"10.1016/j.apsusc.2025.164058","url":null,"abstract":"<div><div>Low electronic conductivity and poor cycling stability at high rates have limited the practical application of Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> (NVP). In this study, NVP coated with phenol–formaldehyde-derived porous carbon and citric acid-derived amorphous carbon (NVP/C-P) is prepared by a two-step sol–gel method. The porous carbon skeleton not only enhances the conductivity of the material by forming a conductive graphited framework but also buffers the stress impact of high currents on the electrode material, ensuring excellent rate performance and cycling stability even at high current densities. Due to the unique porous skeleton, the specific surface area of NVP/C-P is significantly enlarged, resulting in a favourable contacting effects between electrode and electrolyte. In addition, the abundant mesoporous structure in the sample can be utilized for Na<sup>+</sup> storage, contributing to pseudocapacitance. Hence, NVP/C-P can exhibit a high initial specific capacity of 132.8 mAh/g at 0.1C, significantly exceeding the theoretical value of 117.6 mAh/g. Furthermore, it can release a value of 53.7 mAh/g at 100C, maintaining a specific capacity of 50.8 mAh/g after cycling for 3000 cycles with a super high retention rate of 94.5 %. The structural evolution and sodium storage mechanism during charge and discharge processes of the modified sample NVP/C-P are investigated by ex-situ XRD, confirming its excellent stability and reversibility. The after-cycled XRD/SEM/CV/EIS demonstrate NVP/C-P possesses relatively dominant kinetic characteristics and crystal/morphological stability, further verifying the great advantages of the modification by dual-carbon substrate and porous skeleton for NVP/C-P.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"711 ","pages":"Article 164058"},"PeriodicalIF":6.3,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coordinated regulation of corrosion and wear properties of Zr alloy by constructing surface gradient microstructure using fiber laser 利用光纤激光构建表面梯度组织协调调节Zr合金的腐蚀磨损性能

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-07-12 DOI: 10.1016/j.apsusc.2025.164059

Dayuan Wang, Yongxin Liu, Xiaowei Lei, Danhong Wang, Wenjing Yao, Nan Wang

{"title":"Coordinated regulation of corrosion and wear properties of Zr alloy by constructing surface gradient microstructure using fiber laser","authors":"Dayuan Wang, Yongxin Liu, Xiaowei Lei, Danhong Wang, Wenjing Yao, Nan Wang","doi":"10.1016/j.apsusc.2025.164059","DOIUrl":"10.1016/j.apsusc.2025.164059","url":null,"abstract":"<div><div>Although R60702 Zr alloy is a strong passivation material, it is susceptible to pitting corrosion in Cl<sup>−</sup> environments and exhibits poor wear resistance, which limits its range of applications. This work synergistically manipulates the surface corrosion and wear resistances of R60702 Zr alloy through surface phase control and gradient microstructural design. A gradient structure composed of fine αʹ martensitic slats is achieved by laser surface remelting and quenching, leading to the formation of passive film with excellent corrosion resistance. Meanwhile, a uniformly varying surface gradient structure is constructed at a laser power of 500 W, along with finer and more uniformly distributed ZrFe<sub>2</sub> precipitates. Additionally, the oxide film thickness is increased, rendering superior corrosion resistance in Cl<sup>−</sup> environments. The increase in grain and subgrain boundary area and high-density dislocations owing to martensitic phase transformation enhance the surface hardness and improves the wear resistance. Particularly, the gradient variations in grain size and phase structures lead to the gradient increase of pitting resistance and hardness from the substrate to surface, which is anticipated to enhance the endurance of the surface modification layer. Our convenient way of constructing surface gradient microstructure provides a valuable reference for elevating the surface corrosion and wear resistances of Zr alloys.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"711 ","pages":"Article 164059"},"PeriodicalIF":6.3,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bimetallic co-growth of In2O3/Co3O4 porous nanorods for rapid detection of acetone gas 双金属共生长In2O3/Co3O4多孔纳米棒用于丙酮气体的快速检测

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-07-11 DOI: 10.1016/j.apsusc.2025.163972

Tao Wang , Nan Yang , Changyu Duan , Longyun Li , Yuetong Cao , Ke Wang , Zhongqi Zhu , Genlin Zhang , Yumin Zhang , Qingju Liu , Jin Zhang

{"title":"Bimetallic co-growth of In2O3/Co3O4 porous nanorods for rapid detection of acetone gas","authors":"Tao Wang , Nan Yang , Changyu Duan , Longyun Li , Yuetong Cao , Ke Wang , Zhongqi Zhu , Genlin Zhang , Yumin Zhang , Qingju Liu , Jin Zhang","doi":"10.1016/j.apsusc.2025.163972","DOIUrl":"10.1016/j.apsusc.2025.163972","url":null,"abstract":"<div><div>Acetone, a critical biomarker in exhaled breath for the diagnosis of diabetes, necessitates the development of high-performance gas sensors for real-time monitoring. In this work, bimetallic In<sub>2</sub>O<sub>3</sub>/Co<sub>3</sub>O<sub>4</sub> porous nanorods with tunable In/Co molar ratios were synthesized via a hydrothermal approach. The optimized sensor 3-ICO (In:Co = 3:10, molar ratio), exhibited remarkable acetone-sensing performance with a high response of 125.6–10 ppm acetone at 250 °C, ultrafast response/recovery times (45 s/19 s), outstanding selectivity, and long-term stability. The integration of materials characterization with density functional theory (DFT) simulations demonstrated that the p-n heterojunction formed between Co<sub>3</sub>O<sub>4</sub> and In<sub>2</sub>O<sub>3</sub> facilitates interfacial charge transfer, enhancing both the oxygen vacancy concentration and specific surface area. These synergistic effects significantly improve acetone adsorption energy and electron transport efficiency. This work highlights the pivotal role of heterojunction engineering in optimizing the detection performance of metal-oxide semiconductors for low-concentration volatile organic compounds (VOCs), offering promising applications in non-invasive diabetes diagnosis.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"711 ","pages":"Article 163972"},"PeriodicalIF":6.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient low temperature formic acid sensing based on CdS-sensitized {111}-faceted NiCo2O4 octahedral p-n junction: Experimental and theoretical studies 基于cd敏化{111}面NiCo2O4八面体p-n结的高效低温甲酸传感：实验和理论研究

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-07-11 DOI: 10.1016/j.apsusc.2025.164046

Yan Liang , Huizhen Zhan , Hongying Li , Ruizhen Tian , Xiaojian Zhao , Fang Cheng , Yu Jiang , Yong Yang

{"title":"Efficient low temperature formic acid sensing based on CdS-sensitized {111}-faceted NiCo2O4 octahedral p-n junction: Experimental and theoretical studies","authors":"Yan Liang , Huizhen Zhan , Hongying Li , Ruizhen Tian , Xiaojian Zhao , Fang Cheng , Yu Jiang , Yong Yang","doi":"10.1016/j.apsusc.2025.164046","DOIUrl":"10.1016/j.apsusc.2025.164046","url":null,"abstract":"<div><div>Resistive semiconductor gas sensors provide an effective means for detecting volatile organic compounds (VOCs) formic acid. However, relevant research is still in its initial stage, and the gas sensing performance urgently needs to be improved, especially the high operating temperatures and detection limits. Here, a NiCo<sub>2</sub>O<sub>4</sub>/CdS octahedral p-n junction which is composed of active {111} crystal facets exposed NiCo<sub>2</sub>O<sub>4</sub> octahedron as substrate and highly-dispersed CdS nanoparticles as sensitizer is designed for formic acid sensing. Research has shown that the NiCo<sub>2</sub>O<sub>4</sub>/CdS octahedral p-n junction can achieve efficient detection of formic acid at relatively low operating temperature of 200°C, which displays an acceptable response value of 5.68 (R<sub>g</sub>/R<sub>a</sub>) towards 100 ppm formic acid, a low detection limit of 0.421 ppm, excellent long-term stability and selectivity. In-depth research on the formic acid sensing mechanism at the atomic and electronic levels is conducted through combining first principles calculations and experimental characterization. This study not only provides a highly promising gas sensing material for the efficient detection of formic acid at relatively low operating temperature, but also greatly enriches the relevant gas sensing mechanism, which has important guiding significance for the further development of VOCs gas sensors.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"711 ","pages":"Article 164046"},"PeriodicalIF":6.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of F and N doping on structure, electrical transport and magnetic properties in PbPdO2 thin films F和N掺杂对PbPdO2薄膜结构、电输运和磁性能的影响

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-07-11 DOI: 10.1016/j.apsusc.2025.164050

Hai Jia , Wenti Guo , Liqiang Zeng , Quanlin Chen , Zhiqiang Huang , Zhiya Lin , Xiaohui Huang , Jian-Min Zhang , Zhigao Huang , Shaoming Ying

{"title":"Effects of F and N doping on structure, electrical transport and magnetic properties in PbPdO2 thin films","authors":"Hai Jia , Wenti Guo , Liqiang Zeng , Quanlin Chen , Zhiqiang Huang , Zhiya Lin , Xiaohui Huang , Jian-Min Zhang , Zhigao Huang , Shaoming Ying","doi":"10.1016/j.apsusc.2025.164050","DOIUrl":"10.1016/j.apsusc.2025.164050","url":null,"abstract":"<div><div>Single-phase F or N doped PbPdO<sub>2</sub> thin films crystallizing in a body-centered orthorhombic structure were fabricated via pulsed laser deposition and high-temperature treatment. Structural analyses confirmed the coexistence of Pb vacancies and oxygen defects. The electrical properties of the films demonstrated currents and the temperature dependences of resistivity <em>ρ</em><sub>I</sub> (<em>T</em>). The current induced negative colossal electroresistance (CER) was observed in the F or N-doped PbPdO<sub>2</sub> thin films. Similar to PbPdO<sub>2</sub> films, F or N-doped PbPdO<sub>2</sub> thin films are also ferromagnetic, and can significantly increase the magnetic moment of the films. Moreover, the origin of the magnetism can be attributed to the following: 1 μB contribution of O<sup>1−</sup> in the film; F and Nions substituted for oxygen on a lattice site and the F and N dopants in the interstitial sites can induce both distinct roles on the valence states of oxygen and Pd ion, which significantly alters the magnetic properties of F and N-doped PbPdO<sub>2</sub>. The results show that the enhanced magnetization of PbPdO<sub>2</sub> thin films doped with F or N are mainly due to Pd<sup>(2−δ)+</sup> induced by F and N and more O<sup>1−</sup> in the films. Finally, the experimental results are well verified by the first principles calculation results.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"711 ","pages":"Article 164050"},"PeriodicalIF":6.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual-functional interfacial engineering with Portulaca oleracea phytochemicals enables efficient and eco-safe perovskite solar cells 双功能界面工程与马蹄苋植物化学物质使高效和生态安全的钙钛矿太阳能电池

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-07-11 DOI: 10.1016/j.apsusc.2025.164045

Yongjia Li , Zhengyan He , Xinjing Chen , Wenhui Meng , Nan Wu , Shufang Zhang , Qi Zhang , Changlin Yao , Hai Zhong

{"title":"Dual-functional interfacial engineering with Portulaca oleracea phytochemicals enables efficient and eco-safe perovskite solar cells","authors":"Yongjia Li , Zhengyan He , Xinjing Chen , Wenhui Meng , Nan Wu , Shufang Zhang , Qi Zhang , Changlin Yao , Hai Zhong","doi":"10.1016/j.apsusc.2025.164045","DOIUrl":"10.1016/j.apsusc.2025.164045","url":null,"abstract":"<div><div>Perovskite solar cells (PSCs) represent a transformative renewable energy technology, leveraging their low-cost fabrication, high efficiency, and scalable production. However, persistent challenges of operational instability and lead leakage still hinder their practical deployment. Here, we address these dual issues through synergistic interfacial engineering and lead-sequestering strategies. By introducing Oleracein E (OE), a naturally derived phytochemical from <em>Portulaca oleracea</em> (hereinafter referred to as PO) with moderate Pb<sup>2+</sup>-binding affinity, at the SnO<sub>2</sub>/perovskite interface, we achieve concurrent defect passivation, perovskite crystallization regulation, and lead leakage suppression. The multifunctional groups of OE passivate surface defects of SnO<sub>2</sub>, enhance interfacial conductivity, and promote hydrogen-bond-assisted growth of large-grained perovskite films, minimizing nonradiative recombination. The resulting PSCs deliver a champion power conversion efficiency of 25.02 % with enhanced operational stability. Furthermore, integrating OE-modified interface with a bio-based encapsulation layer containing PO extracts enables dual lead sequestration. Under severe mechanical damage, this hierarchical design suppresses >99.8 % of lead leakage, limiting Pb<sup>2+</sup> release to 8.33 ppb in a real-world condition, which is far below regulatory thresholds for drinking water (15 ppb) and sewage discharge (50 ppb). Our work establishes a sustainable, cost-effective roadmap for eco-safe and high-performance PSCs, advancing their practical application.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"711 ","pages":"Article 164045"},"PeriodicalIF":6.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel AZO capping approach on SnO thin-film transistors for efficient threshold voltage modulation and electrical performance enhancement 一种新的氮化硅薄膜晶体管的AZO封盖方法，用于有效的阈值电压调制和电性能增强

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-07-11 DOI: 10.1016/j.apsusc.2025.164044

Jongyoun Park , Sungjoo Song , Seung Hwan Kim , Jong-Hyun Kim , Jeong-Kyu Kim , Hyun-Yong Yu

{"title":"A novel AZO capping approach on SnO thin-film transistors for efficient threshold voltage modulation and electrical performance enhancement","authors":"Jongyoun Park , Sungjoo Song , Seung Hwan Kim , Jong-Hyun Kim , Jeong-Kyu Kim , Hyun-Yong Yu","doi":"10.1016/j.apsusc.2025.164044","DOIUrl":"10.1016/j.apsusc.2025.164044","url":null,"abstract":"<div><div>A p-type oxide semiconductor, SnO, is promising candidate for the channel material of monolithic 3D integration due to its low-temperature process compatibility and high hole mobility. In this study, we demonstrate the novel capping approach enabling passivation and doping, based on Al-doped ZnO (AZO), to the SnO channel. This AZO capping technique successfully enhanced the overall electrical performance of SnO thin-film transistors (TFTs) through oxygen diffusion driven by the oxygen areal density difference, compared to SnO TFTs without a capping layer. The field effect mobility increased from 1.6 to 2.4 cm<sup>2</sup>/V·s, achieving one of the best values reported. I<sub>ON</sub>/I<sub>OFF</sub> was increased from 3.5 × 10<sup>2</sup> to 2.6 × 10<sup>3</sup>, subthreshold swing reduced from 15.2 to 9.3 V/dec. Moreover, the AZO capping also enables wide-range threshold voltage (V<sub>TH</sub>)control via Al-induced modulation of hole concentration in the SnO through AZO thickness control. The V<sub>TH</sub> shift per gate voltage sweep range was tunable up to 13 %, reaching one of the highest values reported and enhancing design flexibility. This V<sub>TH</sub> controllability significantly improved the noise margin of SnO–IGZO inverters. Therefore, the proposed AZO capping technique addresses fundamental limitations in SnO TFTs, enabling overall performance enhancement and improved design flexibility for oxide semiconductor circuits.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"711 ","pages":"Article 164044"},"PeriodicalIF":6.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

TiO2/Bi4Ti3O12 heterojunction optoelectronic synaptic devices for simulating associative memory and neuromorphic computation 模拟联想记忆和神经形态计算的TiO2/Bi4Ti3O12异质结光电突触器件

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-07-11 DOI: 10.1016/j.apsusc.2025.164049

Sheng-Feng Yin, Qi-Jun Sun, Ling-Feng Liu, Shu-Zheng Liu, Yan-Ping Jiang, Xin-Gui Tang

{"title":"TiO2/Bi4Ti3O12 heterojunction optoelectronic synaptic devices for simulating associative memory and neuromorphic computation","authors":"Sheng-Feng Yin, Qi-Jun Sun, Ling-Feng Liu, Shu-Zheng Liu, Yan-Ping Jiang, Xin-Gui Tang","doi":"10.1016/j.apsusc.2025.164049","DOIUrl":"10.1016/j.apsusc.2025.164049","url":null,"abstract":"<div><div>Neuromorphic computing is regarded as an effective way to break through the bottleneck of traditional von Neumann architectures, and its hardware realization has attracted much attention. As the core component of brain-like chips, high-performance artificial synapses are the key elements to realize efficient neuromorphic computing. Based on the above, Au/TiO<sub>2</sub>/BIT/ITO optoelectronic synaptic devices were fabricated in this study, which effectively simulate the functions of biological synapses, including short-term/long-term plasticity, paired-pulse fusibility (PPF), spike-time-dependent plasticity (STDP), and so on. Undethe stimulation of light pulses, non-volatile modulation and “learning experience” processes are successfully realized. In addition, Pavlov’s dog conditioned reflex experiment is successfully simulated using optoelectronic combination. Finally, a convolutional neural network (CNN) is constructed for the MNIST and Fashion-MNIST datasets with recognition accuracies of 96.74 % and 83.03 %, respectively. Reservoir neural networks are also constructed to evaluate the reliability of the memristor, and the recognition accuracy for the MNIST dataset reaches 92.5 %.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"711 ","pages":"Article 164049"},"PeriodicalIF":6.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Oxide layer with excellent corrosion resistance obtained on carbon steel by pressure swing oxidation 用变压氧化法在碳钢表面获得了具有优异耐腐蚀性能的氧化层

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-07-11 DOI: 10.1016/j.apsusc.2025.164048

Junjie Zhou , Shawei Tang , Jin Hu

{"title":"Oxide layer with excellent corrosion resistance obtained on carbon steel by pressure swing oxidation","authors":"Junjie Zhou , Shawei Tang , Jin Hu","doi":"10.1016/j.apsusc.2025.164048","DOIUrl":"10.1016/j.apsusc.2025.164048","url":null,"abstract":"<div><div>Utilizing the oxide layer of carbon steel as an anti-corrosion protective layer is an environmentally friendly and cost-effective strategy. In this paper, a novel pressure swing oxidation (PSO) method was used to fabricate an oxide layer on the surface of Q235B, and the limiting effect of PSO on oxidation was presented using a reactive force field (ReaxFF). The surface characteristics and corrosion resistance of the oxide layers formed at varying temperature, as well as the different stage of PSO were investigated, and the formation mechanism of the oxide layer was discussed in detail. It can be found that the PSO process intensively affects the thickness, morphology and surface roughness along with phase composition of the oxide layers, which further influences the corrosion resistance. After the oxidation treatment, the corrosion current density of the treated sample was 3.31 × 10<sup>−7</sup> A·cm<sup>−2</sup> which was reduced by about one order of magnitude in comparison with untreated Q235B. At the same time, an ultra-long passivation zone appeared in the corresponding polarization curve. Moreover, the impedance modulus at 0.01 Hz reached 1.29 × 10<sup>6</sup> Ω·cm<sup>2</sup>.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"711 ","pages":"Article 164048"},"PeriodicalIF":6.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0