Pub Date : 2024-10-24DOI: 10.1016/j.surfin.2024.105324
Xianwei Qian, Lida Xu, Le Su, Lantian Tang, Shiye Ouyang, Xiong Zhou, Muhan Wu, Chao Wu, Lingyun Wang
The development of high-temperature thick film strain gauges (TFSGs) that offer both durability and a high gauge factor (GF) remains a formidable challenge. This study integrates polymer-derived ceramic technology with filler techniques to introduce the SiCNO/In2O3 TFSG. The proposed TFSG demonstrates a stable strain response and exceptional thermal stability, enabling its application at temperatures up to 1100 °C. Notably, the SiCNO/In2O3 TFSG exhibits minimal resistance drift of 0.31 %/h at 1100 °C, and an impressive GF of 10.94 at 1000 °C. These advancements underscore its significant potential for applications requiring precise strain monitoring under harsh thermal conditions, such as propulsion systems and industrial processes.
开发兼具耐用性和高测量系数（GF）的高温厚膜应变片（TFSG）仍然是一项艰巨的挑战。本研究将聚合物衍生陶瓷技术与填料技术相结合，推出了 SiCNO/In2O3 TFSG。所提出的 TFSG 具有稳定的应变响应和优异的热稳定性，因此可在高达 1100 °C 的温度下使用。值得注意的是，SiCNO/In2O3 TFSG 在 1100 °C 时的电阻漂移极小，仅为 0.31 %/h，而在 1000 °C 时的 GF 值为 10.94，令人印象深刻。这些进步凸显了其在推进系统和工业流程等需要在苛刻热条件下进行精确应变监测的应用中的巨大潜力。
{"title":"Printing highly sensitive strain gauges with polymer-derived ceramics and In2O3 composites for high-temperature applications","authors":"Xianwei Qian, Lida Xu, Le Su, Lantian Tang, Shiye Ouyang, Xiong Zhou, Muhan Wu, Chao Wu, Lingyun Wang","doi":"10.1016/j.surfin.2024.105324","DOIUrl":"10.1016/j.surfin.2024.105324","url":null,"abstract":"<div><div>The development of high-temperature thick film strain gauges (TFSGs) that offer both durability and a high gauge factor (GF) remains a formidable challenge. This study integrates polymer-derived ceramic technology with filler techniques to introduce the SiCNO/In<sub>2</sub>O<sub>3</sub> TFSG. The proposed TFSG demonstrates a stable strain response and exceptional thermal stability, enabling its application at temperatures up to 1100 °C. Notably, the SiCNO/In<sub>2</sub>O<sub>3</sub> TFSG exhibits minimal resistance drift of 0.31 %/h at 1100 °C, and an impressive GF of 10.94 at 1000 °C. These advancements underscore its significant potential for applications requiring precise strain monitoring under harsh thermal conditions, such as propulsion systems and industrial processes.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142536130","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}
Pub Date : 2024-10-24DOI: 10.1016/j.surfin.2024.105243
Mehmet Hanifi Doğru , Murat Kalak , Burak Şahin , Eyüp Yeter , Kursad Gov
Inconel 718, a nickel-based super alloy, has a broad applications area from aerospace, medical and defence to traditional industries because of its high durability, corrosion resistance and elevated temperature performance. Unconventional surface treatment methods of abrasive flow machining (AFM) and shot peening (SP) are applied to improve the mechanical performance of Inconel 718. In this work, a new surface treatment process known as flow peening (GOV) already developed by combining the advantages of abrasive flow machining (AFM) and shot peening methods such as surface finishing and residual compressive stress generation respectively was applied experimentally for Inconel 718. The effects of process parameters for GOV and AFM processes on the surface quality of the specimens were experimentally investigated. White layer decrease, surface roughness decrease and material removal amount were discussed for both processes. The best surface quality with 0.56 μm Ra surface roughness value and material removal amount of 7.2 mg were obtained by GOV process while similar level of surface roughness value of 0.52 μm was obtained by removing 6648.03 mg material for AFM. When the AFM process was continued, the best values of 0.24 μm Ra was obtained removing excess material of 17,385.60 mg compared to the GOV process. Also, all these results were supported by SEM images.
{"title":"A comparative experimental study on abrasive flow machining vs flow peening GOV processes on Inconel 718","authors":"Mehmet Hanifi Doğru , Murat Kalak , Burak Şahin , Eyüp Yeter , Kursad Gov","doi":"10.1016/j.surfin.2024.105243","DOIUrl":"10.1016/j.surfin.2024.105243","url":null,"abstract":"<div><div>Inconel 718, a nickel-based super alloy, has a broad applications area from aerospace, medical and defence to traditional industries because of its high durability, corrosion resistance and elevated temperature performance. Unconventional surface treatment methods of abrasive flow machining (AFM) and shot peening (SP) are applied to improve the mechanical performance of Inconel 718. In this work, a new surface treatment process known as flow peening (GOV) already developed by combining the advantages of abrasive flow machining (AFM) and shot peening methods such as surface finishing and residual compressive stress generation respectively was applied experimentally for Inconel 718. The effects of process parameters for GOV and AFM processes on the surface quality of the specimens were experimentally investigated. White layer decrease, surface roughness decrease and material removal amount were discussed for both processes. The best surface quality with 0.56 μm R<sub>a</sub> surface roughness value and material removal amount of 7.2 mg were obtained by GOV process while similar level of surface roughness value of 0.52 μm was obtained by removing 6648.03 mg material for AFM. When the AFM process was continued, the best values of 0.24 μm R<sub>a</sub> was obtained removing excess material of 17,385.60 mg compared to the GOV process. Also, all these results were supported by SEM images.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571618","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}
Pub Date : 2024-10-24DOI: 10.1016/j.surfin.2024.105329
Donglin Zhang , Yuan Zhang , Jiaqi Song , Shuang Zhao , Tao Xu , Xin Tian , Xiuchen Zhao , Yongjun Huo
Nanotwinned silver (NT-Ag) exhibits excellent mechanical and electrical properties, attributed to its high-density and (111) highly-oriented twinning structure in nanoscale. Therefore, it has recently drawn much attention in the field of electronic packaging, where it can be utilized as interconnection or metallization materials. However, it has been a critical challenge to fabricate the high-density and highly-oriented NT-Ag onto polycrystalline ceramic substrates, whose crystal structure does not support the epitaxial growth of NT-Ag films. In the current work, a high-density and highly-oriented NT-Ag film has been fabricated onto a polycrystalline ceramic substrate, i.e., NT-Ag on silicon nitride (NT-Ag@Si3N4), using the magnetron sputtering method. As results, a close-packed arrangement of high-density NT-Ag has been observed within columnar grains aligned along its growth direction, whereas the nanoindentation hardness of the NT-Ag film reached 1.82 GPa, with an electrical resistivity of 2.06 μΩ‧cm. Moreover, this study has discussed and explained the growth kinetics and mechanism of NT-Ag films, by controlling magnetron sputtering process parameters, such as sputtering power and argon flow rate. Additionally, the differences in the growth mechanism of NT-Ag on (100) Si and polycrystalline Si3N4 have also been investigated. With its superior material properties, NT-Ag@Si3N4 holds great promise in the applications of advanced packaging technology for high-power electronics.
{"title":"Sputtering of (111) highly-oriented nanotwinned Ag on polycrystalline Si3N4 substrates for high-power electronic packaging","authors":"Donglin Zhang , Yuan Zhang , Jiaqi Song , Shuang Zhao , Tao Xu , Xin Tian , Xiuchen Zhao , Yongjun Huo","doi":"10.1016/j.surfin.2024.105329","DOIUrl":"10.1016/j.surfin.2024.105329","url":null,"abstract":"<div><div>Nanotwinned silver (NT-Ag) exhibits excellent mechanical and electrical properties, attributed to its high-density and (111) highly-oriented twinning structure in nanoscale. Therefore, it has recently drawn much attention in the field of electronic packaging, where it can be utilized as interconnection or metallization materials. However, it has been a critical challenge to fabricate the high-density and highly-oriented NT-Ag onto polycrystalline ceramic substrates, whose crystal structure does not support the epitaxial growth of NT-Ag films. In the current work, a high-density and highly-oriented NT-Ag film has been fabricated onto a polycrystalline ceramic substrate, i.e., NT-Ag on silicon nitride (NT-Ag@Si<sub>3</sub>N<sub>4</sub>), using the magnetron sputtering method. As results, a close-packed arrangement of high-density NT-Ag has been observed within columnar grains aligned along its growth direction, whereas the nanoindentation hardness of the NT-Ag film reached 1.82 GPa, with an electrical resistivity of 2.06 μΩ‧cm. Moreover, this study has discussed and explained the growth kinetics and mechanism of NT-Ag films, by controlling magnetron sputtering process parameters, such as sputtering power and argon flow rate. Additionally, the differences in the growth mechanism of NT-Ag on (100) Si and polycrystalline Si<sub>3</sub>N<sub>4</sub> have also been investigated. With its superior material properties, NT-Ag@Si<sub>3</sub>N<sub>4</sub> holds great promise in the applications of advanced packaging technology for high-power electronics.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552024","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}
Pub Date : 2024-10-24DOI: 10.1016/j.surfin.2024.105334
A.S. Shkvarin , A.I. Merentsov , M.S. Postnikov , E.G. Shkvarina , E.G. Dyachkov , E.V. Mostovshchikova , A.V. Koroleva , E.V. Zhizhin , A.N. Titov
An experimental study of the crystal and electronic structure and properties of the quasi-two-dimensional CuxZrSe2 compound in the region of copper concentration, in which Cu atoms are tetrahedrally coordinated by the Se atoms, has been performed. A study of the magnetic, kinetic, and optical properties of CuxZrSe2 revealed that the tetrahedral coordination of the Cu by Se atoms results in the formation of a covalent bond with a probable Cu 4s/Se 4p hybridization. A combination of soft X-ray spectroscopic methods (X-ray photoelectron spectroscopy, X-ray absorption spectroscopy and resonance photoelectron spectroscopy) with optical spectroscopy, which was used to investigate the electronic structure, confirmed this assumption. The Cu 4s/Se 4p hybrid band falls into the energy gap between the Zr 4d-derived conduction band and the Se 4p-derived valence band.
对铜原子与硒原子四面体配位的准二维 CuxZrSe2 化合物在铜浓度区域的晶体和电子结构及性质进行了实验研究。对 CuxZrSe2 的磁性、动力学和光学特性进行的研究表明，铜原子与硒原子的四面体配位形成了可能存在 Cu 4s/Se 4p 杂化的共价键。软 X 射线光谱方法（X 射线光电子能谱、X 射线吸收光谱和共振光电子能谱）与用于研究电子结构的光学光谱相结合，证实了这一假设。Cu 4s/Se 4p 混合带位于 Zr 4d 导带和 Se 4p 价带之间的能隙中。
{"title":"Electronic structure of CuxZrSe2 with tetrahedrally-coordinated Cu atoms","authors":"A.S. Shkvarin , A.I. Merentsov , M.S. Postnikov , E.G. Shkvarina , E.G. Dyachkov , E.V. Mostovshchikova , A.V. Koroleva , E.V. Zhizhin , A.N. Titov","doi":"10.1016/j.surfin.2024.105334","DOIUrl":"10.1016/j.surfin.2024.105334","url":null,"abstract":"<div><div>An experimental study of the crystal and electronic structure and properties of the quasi-two-dimensional Cu<sub>x</sub>ZrSe<sub>2</sub> compound in the region of copper concentration, in which Cu atoms are tetrahedrally coordinated by the Se atoms, has been performed. A study of the magnetic, kinetic, and optical properties of Cu<sub>x</sub>ZrSe<sub>2</sub> revealed that the tetrahedral coordination of the Cu by Se atoms results in the formation of a covalent bond with a probable Cu 4s/Se 4p hybridization. A combination of soft X-ray spectroscopic methods (X-ray photoelectron spectroscopy, X-ray absorption spectroscopy and resonance photoelectron spectroscopy) with optical spectroscopy, which was used to investigate the electronic structure, confirmed this assumption. The Cu 4s/Se 4p hybrid band falls into the energy gap between the Zr 4d-derived conduction band and the Se 4p-derived valence band.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571619","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}
Pub Date : 2024-10-24DOI: 10.1016/j.surfin.2024.105336
Muhammad Zaman Khan , Hadi Taghavian , Jakub Wiener , Jiri Militky , Yuanfeng Wang , Blanka Tomkova , Miroslav Cernik , Lukas Dvorak
Medical textiles have gained significant interest for their capability to prevent the transmission of infectious diseases and ensure the safety of healthcare professionals. Nevertheless, the incorporation of eco-friendly methods to enhance the functionality of these textiles, achieving both impressive antibacterial features and notable ultraviolet (UV) protection, along with thermal stability for effective use in UV-induced clean chambers, remains a complex undertaking. The main objective of this study is to explore the application of the green chemistry method in immobilizing zinc oxide (ZnO) nanoparticles (NPs) onto polydopamine (PDA)-templated polyester (PET) fabrics for potential use in medical textiles. Specifically, we examined the impact of varying the concentration of the zinc acetate dihydrate as the Zn precursor on the synthesis of ZnO NPs. Nanoparticle morphology and topography were analyzed using SEM and AFM. Elemental and chemical characteristics were further assessed through EDS analysis, FT-IR analysis, Raman spectroscopy, and X-ray diffraction (XRD) techniques. The results indicate that ZnO NPs immobilized on PDA-templated PET fabrics exhibit exceptional antibacterial and UV protection properties. Moreover, the presence of the ZnO/PDA layer on the PET fabric significantly enhances its thermal stability, making it an ideal candidate for medical textile applications.
医用纺织品能够防止传染病的传播，确保医护人员的安全，因此备受关注。然而，如何采用生态友好的方法来增强这些纺织品的功能，实现令人印象深刻的抗菌特性和显著的紫外线（UV）防护，以及在紫外线诱导的洁净室中有效使用的热稳定性，仍然是一项复杂的工作。本研究的主要目的是探索绿色化学方法在聚多巴胺（PDA）模板聚酯（PET）织物上固定氧化锌（ZnO）纳米粒子（NPs）中的应用，以便将其用于医用纺织品。具体而言，我们研究了不同浓度的二水醋酸锌作为锌前驱体对氧化锌纳米粒子合成的影响。我们使用扫描电镜和原子力显微镜分析了纳米粒子的形态和形貌。通过 EDS 分析、FT-IR 分析、拉曼光谱和 X 射线衍射 (XRD) 技术进一步评估了元素和化学特性。结果表明，固定在 PDA 模板 PET 织物上的氧化锌纳米粒子具有优异的抗菌和防紫外线性能。此外，PET 织物上 ZnO/PDA 层的存在大大提高了其热稳定性，使其成为医用纺织品应用的理想候选材料。
{"title":"Green in-situ immobilization of ZnO nanoparticles for functionalization of polyester fabrics","authors":"Muhammad Zaman Khan , Hadi Taghavian , Jakub Wiener , Jiri Militky , Yuanfeng Wang , Blanka Tomkova , Miroslav Cernik , Lukas Dvorak","doi":"10.1016/j.surfin.2024.105336","DOIUrl":"10.1016/j.surfin.2024.105336","url":null,"abstract":"<div><div>Medical textiles have gained significant interest for their capability to prevent the transmission of infectious diseases and ensure the safety of healthcare professionals. Nevertheless, the incorporation of eco-friendly methods to enhance the functionality of these textiles, achieving both impressive antibacterial features and notable ultraviolet (UV) protection, along with thermal stability for effective use in UV-induced clean chambers, remains a complex undertaking. The main objective of this study is to explore the application of the green chemistry method in immobilizing zinc oxide (ZnO) nanoparticles (NPs) onto polydopamine (PDA)-templated polyester (PET) fabrics for potential use in medical textiles. Specifically, we examined the impact of varying the concentration of the zinc acetate dihydrate as the Zn precursor on the synthesis of ZnO NPs. Nanoparticle morphology and topography were analyzed using SEM and AFM. Elemental and chemical characteristics were further assessed through EDS analysis, FT-IR analysis, Raman spectroscopy, and X-ray diffraction (XRD) techniques. The results indicate that ZnO NPs immobilized on PDA-templated PET fabrics exhibit exceptional antibacterial and UV protection properties. Moreover, the presence of the ZnO/PDA layer on the PET fabric significantly enhances its thermal stability, making it an ideal candidate for medical textile applications.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552020","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}
Pub Date : 2024-10-24DOI: 10.1016/j.surfin.2024.105284
Ziyu Lyu, Chao Gu, Zhongliang Wang, Yanping Bao
The reaction mechanism and efficiency of hydrogen deoxidation used in ultra-low carbon steel are explored in this work. A combination of first-principle simulations and thermodynamic calculations were performed on the reaction mechanisms of hydrogen with dissolved oxygen. Laboratory thermal state experiments were used to analyze the effects of different initial oxygen contents of steel and different hydrogen injection flow rates on the deoxidation ability. The results show that the hydrogen deoxidation mainly happens with the gas state of H2 since there are more reactive sites of H atoms in the gas bubble compared to the dissolved H. Higher initial oxygen content and larger hydrogen blowing flow rate are beneficial to the deoxidation reaction efficiency. With hydrogen deoxidation, the inclusion number can be reduced by half compared to Al deoxidation, and the finally total oxygen content can reach 6.8 × 10–6. The actual reaction hydrogen utilization efficiency fluctuates between 0.13 %-1.17 % in this study, which can be improved by extending the resistance time of H2 bubbles in the molten steel. This paper provides in-depth theoretical support and atomic-scale insights into the reaction between hydrogen and oxygen in steel, building a foundation for the hydrogen application in the production of ultra-low-carbon steel.
本研究探讨了超低碳钢中使用的氢气脱氧反应机理和效率。对氢与溶解氧的反应机理进行了第一原理模拟和热力学计算相结合的研究。利用实验室热态实验分析了钢中不同初始氧含量和不同注氢流速对脱氧能力的影响。结果表明，氢气脱氧主要发生在 H2 的气态，因为与溶解的 H 相比，气泡中 H 原子的反应位点更多。氢气脱氧时，夹杂数比铝脱氧时减少一半，最终总氧含量可达 6.8 × 10-6。本研究的实际反应氢利用率在 0.13 %-1.17 % 之间波动，可通过延长 H2 气泡在钢水中的停留时间来提高氢利用率。本文为氢气和氧气在钢中的反应提供了深入的理论支持和原子尺度的见解，为氢气在超低碳钢生产中的应用奠定了基础。
{"title":"In-depth analysis on the mechanism and reaction efficiency of hydrogen deoxidation in ultra-low carbon steel","authors":"Ziyu Lyu, Chao Gu, Zhongliang Wang, Yanping Bao","doi":"10.1016/j.surfin.2024.105284","DOIUrl":"10.1016/j.surfin.2024.105284","url":null,"abstract":"<div><div>The reaction mechanism and efficiency of hydrogen deoxidation used in ultra-low carbon steel are explored in this work. A combination of first-principle simulations and thermodynamic calculations were performed on the reaction mechanisms of hydrogen with dissolved oxygen. Laboratory thermal state experiments were used to analyze the effects of different initial oxygen contents of steel and different hydrogen injection flow rates on the deoxidation ability. The results show that the hydrogen deoxidation mainly happens with the gas state of H<sub>2</sub> since there are more reactive sites of H atoms in the gas bubble compared to the dissolved H. Higher initial oxygen content and larger hydrogen blowing flow rate are beneficial to the deoxidation reaction efficiency. With hydrogen deoxidation, the inclusion number can be reduced by half compared to Al deoxidation, and the finally total oxygen content can reach 6.8 × 10<sup>–6</sup>. The actual reaction hydrogen utilization efficiency fluctuates between 0.13 %-1.17 % in this study, which can be improved by extending the resistance time of H<sub>2</sub> bubbles in the molten steel. This paper provides in-depth theoretical support and atomic-scale insights into the reaction between hydrogen and oxygen in steel, building a foundation for the hydrogen application in the production of ultra-low-carbon steel.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552382","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}
Pub Date : 2024-10-24DOI: 10.1016/j.surfin.2024.105331
Midhun Shah , Sanam P.K. Jamshina , P.P. Pradyumnan
Functional oxides employed in electronic components hold significant promise for future electronic devices. Strontium titanate based thin films have several emergent features due to unsaturated bonds, dimension restriction, production of oxygen vacancies and point defects that make them attractive for optoelectronic applications. Here we prepared Pr-doped strontium titanate thin films via RF magnetron sputtering in a pure Argon environment at various gas pressures followed by heat treatment. The structural parameters, analyzed via XRD and Raman spectroscopy, were correlated with the electrical transport properties. Intriguing morphological features such as Stranski–Krastanov (SK) growth and cation segregation observed by FESEM and AFM analysis were further examined to elucidate the conduction mechanism in the films. The optical studies unveiled significant transparency in the visible spectrum. Photoluminescence emission studies at specific wavelengths shed light on the involvement of oxygen vacancies. By carefully controlling annealing conditions and optimizing sputtering parameters, thin films devoid of Sr segregation with highest reported carrier mobility of 33.9 cm2/V s were prepared. The high mobility leading to enhanced conductivity render the films suitable for a wide range of optoelectronic applications.
{"title":"Optimization of carrier mobility in Pr-doped SrTiO3 thin films through controlled Sr-segregation for optoelectronic applications","authors":"Midhun Shah , Sanam P.K. Jamshina , P.P. Pradyumnan","doi":"10.1016/j.surfin.2024.105331","DOIUrl":"10.1016/j.surfin.2024.105331","url":null,"abstract":"<div><div>Functional oxides employed in electronic components hold significant promise for future electronic devices. Strontium titanate based thin films have several emergent features due to unsaturated bonds, dimension restriction, production of oxygen vacancies and point defects that make them attractive for optoelectronic applications. Here we prepared Pr-doped strontium titanate thin films via RF magnetron sputtering in a pure Argon environment at various gas pressures followed by heat treatment. The structural parameters, analyzed via XRD and Raman spectroscopy, were correlated with the electrical transport properties. Intriguing morphological features such as Stranski–Krastanov (SK) growth and cation segregation observed by FESEM and AFM analysis were further examined to elucidate the conduction mechanism in the films. The optical studies unveiled significant transparency in the visible spectrum. Photoluminescence emission studies at specific wavelengths shed light on the involvement of oxygen vacancies. By carefully controlling annealing conditions and optimizing sputtering parameters, thin films devoid of Sr segregation with highest reported carrier mobility of 33.9 cm<sup>2</sup>/V s were prepared. The high mobility leading to enhanced conductivity render the films suitable for a wide range of optoelectronic applications.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571675","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}
Pub Date : 2024-10-24DOI: 10.1016/j.surfin.2024.105338
Xiaoming Zhou , Wei Ge , Xiuneng Tang , Jianle He , Zhen Du , Pengfeng Yu , Dong Guo , Shihong Zhang
A series of MnOx/SAPO-34 was synthesized using deposition-precipitation method with acid, alkali, saline to modify their physicochemical property enhancing the performance for toluene oxidation. The structure-activity relationship was explored in depth using variant instruments. It was found that the SAPO-34 was etched by desiliconization with oxalic acid as precipitant and converting its micropores into mesopores as well as macropores, which is not only conducive to anchoring and dispersion of more active MnOx, but also promote the mass transfer of reactants. Meanwhile, the catalyst derived from oxalic acid possesses abundant redox sites with the strongest low temperature reducibility. As the results, the Mn/S34-OA exhibits the best performance of toluene oxidation with T90=237 °C and ∼100 % CO2 selectivity. Besides, the catalyst maintained long-term stability even in presence of H2O at 260 °C. Furthermore, the reaction mechanism is revealed by in-situ DRIFTS experiments. It is demonstrated that lattice oxygen directly participates in oxidation of toluene as the crucial active component in path of toluene to benzyl alcohol to benzaldehyde to benzoic acid to CO2 finally. In addition, the consumed lattice oxygen is replenished by adsorbed gaseous O2, which is the key to maintain continuous reaction cycle.
{"title":"Optimizing mass-transfer and oxygen components to enhance toluene oxidation for MnOx/SAPO-34 and revealing mechanism by in-situ DRITFS","authors":"Xiaoming Zhou , Wei Ge , Xiuneng Tang , Jianle He , Zhen Du , Pengfeng Yu , Dong Guo , Shihong Zhang","doi":"10.1016/j.surfin.2024.105338","DOIUrl":"10.1016/j.surfin.2024.105338","url":null,"abstract":"<div><div>A series of MnO<sub>x</sub>/SAPO-34 was synthesized using deposition-precipitation method with acid, alkali, saline to modify their physicochemical property enhancing the performance for toluene oxidation. The structure-activity relationship was explored in depth using variant instruments. It was found that the SAPO-34 was etched by desiliconization with oxalic acid as precipitant and converting its micropores into mesopores as well as macropores, which is not only conducive to anchoring and dispersion of more active MnO<sub>x</sub>, but also promote the mass transfer of reactants. Meanwhile, the catalyst derived from oxalic acid possesses abundant redox sites with the strongest low temperature reducibility. As the results, the Mn/S34-OA exhibits the best performance of toluene oxidation with T<sub>90</sub>=237 °C and ∼100 % CO<sub>2</sub> selectivity. Besides, the catalyst maintained long-term stability even in presence of H<sub>2</sub>O at 260 °C. Furthermore, the reaction mechanism is revealed by <em>in-situ</em> DRIFTS experiments. It is demonstrated that lattice oxygen directly participates in oxidation of toluene as the crucial active component in path of toluene to benzyl alcohol to benzaldehyde to benzoic acid to CO<sub>2</sub> finally. In addition, the consumed lattice oxygen is replenished by adsorbed gaseous O<sub>2</sub>, which is the key to maintain continuous reaction cycle.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142560813","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}
Pub Date : 2024-10-24DOI: 10.1016/j.surfin.2024.105330
Lulu Li , Na Li , Yangyang Xin , Zheng Mo , Shuyun Zhou , Chenghua Sun , Qingquan Tian , Xiaobo Chen , Shizhuo Xiao
Photocurable 3D printing technology has attracted widespread attention because of rapid formation speed and high printing accuracy, but photosensitive resin (PSR) materials with scratch resistance have become a difficult problem in 3D printing research. In this paper, polysiloxane core-shell nanoparticles (CSP) were prepared to achieve both reduced friction coefficient and enhanced mechanical properties. Compared with pure photosensitive resin, the 3D printed model with the optimal amount of 2.5 wt% CSP has a lower friction coefficient and wear rate, which are reduced by 77.6 % and 75.8 %, respectively, and the impact strength, tensile strength and elongation at break are increased by 25.7 %, 26.1 % and 40.1 %, respectively. The scratch resistance was evaluated by constant load scratch test and progressive load scratch test. The results showed that CSP significantly improved the scratch resistance of 3D printed models, and the penetration depth was continuously reduced from 175.5 μm to 128.3 μm under a load of 30 N. These findings indicate that CSP is a promising scratch-resistant additive for application, expanding the application range of photocurable 3D printing.
光固化3D打印技术因成型速度快、打印精度高而受到广泛关注，但具有抗划伤性能的光敏树脂（PSR）材料却成为3D打印研究中的难题。本文制备了聚硅氧烷核壳纳米粒子（CSP），以达到降低摩擦系数和增强机械性能的目的。与纯光敏树脂相比，最佳用量为 2.5 wt% CSP 的 3D 打印模型的摩擦系数和磨损率分别降低了 77.6% 和 75.8%，冲击强度、拉伸强度和断裂伸长率分别提高了 25.7%、26.1% 和 40.1%。耐划伤性通过恒载划伤试验和渐进载荷划伤试验进行了评估。结果表明，CSP 显著提高了 3D 打印模型的抗划伤性，在 30 N 负载下，穿透深度从 175.5 μm 持续减小到 128.3 μm。
{"title":"Enhancement of scratch resistance properties on the surface of photocurable 3D printed models through the integration of polysiloxane core–shell nanoparticles","authors":"Lulu Li , Na Li , Yangyang Xin , Zheng Mo , Shuyun Zhou , Chenghua Sun , Qingquan Tian , Xiaobo Chen , Shizhuo Xiao","doi":"10.1016/j.surfin.2024.105330","DOIUrl":"10.1016/j.surfin.2024.105330","url":null,"abstract":"<div><div>Photocurable 3D printing technology has attracted widespread attention because of rapid formation speed and high printing accuracy, but photosensitive resin (PSR) materials with scratch resistance have become a difficult problem in 3D printing research. In this paper, polysiloxane core-shell nanoparticles (CSP) were prepared to achieve both reduced friction coefficient and enhanced mechanical properties. Compared with pure photosensitive resin, the 3D printed model with the optimal amount of 2.5 wt% CSP has a lower friction coefficient and wear rate, which are reduced by 77.6 % and 75.8 %, respectively, and the impact strength, tensile strength and elongation at break are increased by 25.7 %, 26.1 % and 40.1 %, respectively. The scratch resistance was evaluated by constant load scratch test and progressive load scratch test. The results showed that CSP significantly improved the scratch resistance of 3D printed models, and the penetration depth was continuously reduced from 175.5 μm to 128.3 μm under a load of 30 N. These findings indicate that CSP is a promising scratch-resistant additive for application, expanding the application range of photocurable 3D printing.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571617","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}
Pub Date : 2024-10-24DOI: 10.1016/j.surfin.2024.105326
KM Srishti Barnwal , Yukti Gupta , Neena Jaggi
Antibacterial activity of plant-mediated synthesized CuS nanoparticles against gram-positive Bacillus subtilis and gram negative Pseudomonas putida is studied in this presented work. A facile hydrothermal approach was followed to synthesize spherical shaped CuS nanoparticles using flowers extract of Tagetes patula (S1), leaves extract of Azadirachta indica (S2), and bark extract of Terminalia arjuna (S3). Crystal phase identification, average crystallites size, surface morphology, absorbance spectra and energy band gap analyses of samples were further determined using XRD, SEM, and UV-DRS spectroscopy respectively. Furthermore, under irradiation of visible light, antibacterial activity of marigold flowers mediated (S1), neem leaves mediated (S2), and arjuna bark mediated (S3) CuS samples were studied. XRD data confirmed the marigold mediated CuS sample has relatively smaller crystallites size of 10.67 nm. The estimated band gap energies for respective S1, S2, and S3 samples are 174 eV, 175 eV, and 177 eV. The antibacterial analysis of S1 sample displays its excellent antibacterial activity with the formation of relatively large inhibition zones of 29 mm and 30 mm diameters, against Bacillus subtilis and Pseudomonas putida respectively. The demonstrated antibacterial activity of biocompatible CuS nanoparticles suggests their potential use in biomedical applications.
{"title":"Plants-extracts mediated CuS nanoparticles: An effective antibacterial agent","authors":"KM Srishti Barnwal , Yukti Gupta , Neena Jaggi","doi":"10.1016/j.surfin.2024.105326","DOIUrl":"10.1016/j.surfin.2024.105326","url":null,"abstract":"<div><div>Antibacterial activity of plant-mediated synthesized CuS nanoparticles against gram-positive <em>Bacillus subtilis</em> and gram negative <em>Pseudomonas putida</em> is studied in this presented work. A facile hydrothermal approach was followed to synthesize spherical shaped CuS nanoparticles using flowers extract of <em>Tagetes patula</em> (S1), leaves extract of <em>Azadirachta indica</em> (S2), and bark extract of <em>Terminalia arjuna</em> (S3). Crystal phase identification, average crystallites size, surface morphology, absorbance spectra and energy band gap analyses of samples were further determined using XRD, SEM, and UV-DRS spectroscopy respectively. Furthermore, under irradiation of visible light, antibacterial activity of marigold flowers mediated (S1), neem leaves mediated (S2), and arjuna bark mediated (S3) CuS samples were studied. XRD data confirmed the marigold mediated CuS sample has relatively smaller crystallites size of 10.67 nm. The estimated band gap energies for respective S1, S2, and S3 samples are 174 eV, 175 eV, and 177 eV. The antibacterial analysis of S1 sample displays its excellent antibacterial activity with the formation of relatively large inhibition zones of 29 mm and 30 mm diameters, against <em>Bacillus subtilis</em> and <em>Pseudomonas putida</em> respectively. The demonstrated antibacterial activity of biocompatible CuS nanoparticles suggests their potential use in biomedical applications.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552380","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}
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