The conducting two‐dimensional electron gas (2DEG) behavior in LaAlO3 (LAO)/SrTiO3 (STO) and their associated mechanisms from various aspects have brought tremendous attention in the concerned area of research. To correlate the 2DEG behavior with their compositions, we have performed time of flight secondary ion mass spectrometry (TOF‐SIMS) depth profile analysis of thin films of Cr‐doped LAO/STO system as LaAl1‐xCrxO3 (x = 0, 0.2, 0.6 and 1) deposited over TiO2 terminated STO substrate, which includes two parent compounds LAO/STO (metallic) and LCO/STO (insulating). The uniform decrease of La and Al concentration at the interface of LAO/STO (metallic) system and in the contrary the nonuniformity of La and Cr concentration in LCO/STO (insulating) system have been highlighted. The uniform variation of ionic concentration at the interface of LAO/STO may increase the career concentrations to make the system metallic. The upward and downward diffusion at the interfaces of intermediate compositions varies differently from their parent ones due to the mixing of Al and Cr. Our results may help to understand the conducting nature of LAO/STO system for future developments and applications in such system.
LaAlO3（LAO）/SrTiO3（STO）中的导电二维电子气（2DEG）行为及其相关机制从各个方面引起了相关研究领域的极大关注。为了将 2DEG 行为与它们的组成联系起来，我们对沉积在以二氧化钛为端基的 STO（包括两种母体化合物 LAO/STO（金属）和 LCO/STO（绝缘））上的掺铬 LAO/STO 系统薄膜进行了飞行时间二次离子质谱（TOF-SIMS）深度剖面分析。LAO/STO（金属）体系界面上 La 和 Al 的浓度均匀下降，相反，LCO/STO（绝缘）体系中 La 和 Cr 的浓度则不均匀。LAO/STO 界面上离子浓度的均匀变化可能会增加职业浓度，从而使系统具有金属特性。由于铝和铬的混合，中间成分界面上的向上和向下扩散与母体不同。我们的研究结果可能有助于了解 LAO/STO 系统的导电性质，从而促进此类系统的未来开发和应用。
{"title":"Depth profile study of LaAl1‐xCrxO3/SrTiO3 (x = 0, 0.2, 0.6, and 1) using time of flight secondary ion mass spectrometry (TOF‐SIMS)","authors":"Manas Kumar Dalai, Gupteswar Samal, Trupti R. Das, Pramod Kumar, Geetanjali Sehgal, Anjana Dogra","doi":"10.1002/sia.7341","DOIUrl":"https://doi.org/10.1002/sia.7341","url":null,"abstract":"The conducting two‐dimensional electron gas (2DEG) behavior in LaAlO<jats:sub>3</jats:sub> (LAO)/SrTiO<jats:sub>3</jats:sub> (STO) and their associated mechanisms from various aspects have brought tremendous attention in the concerned area of research. To correlate the 2DEG behavior with their compositions, we have performed time of flight secondary ion mass spectrometry (TOF‐SIMS) depth profile analysis of thin films of Cr‐doped LAO/STO system as LaAl<jats:sub>1‐x</jats:sub>Cr<jats:sub>x</jats:sub>O<jats:sub>3</jats:sub> (<jats:italic>x</jats:italic> = 0, 0.2, 0.6 and 1) deposited over TiO<jats:sub>2</jats:sub> terminated STO substrate, which includes two parent compounds LAO/STO (metallic) and LCO/STO (insulating). The uniform decrease of La and Al concentration at the interface of LAO/STO (metallic) system and in the contrary the nonuniformity of La and Cr concentration in LCO/STO (insulating) system have been highlighted. The uniform variation of ionic concentration at the interface of LAO/STO may increase the career concentrations to make the system metallic. The upward and downward diffusion at the interfaces of intermediate compositions varies differently from their parent ones due to the mixing of Al and Cr. Our results may help to understand the conducting nature of LAO/STO system for future developments and applications in such system.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":"135 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141571263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alberto Herrera‐Gomez, David J. H. Cant, Thierry Conard, Olivier Renault, Matthew R. Linford, Joshua W. Pinder, Jeff Fenton, Donald R. Baer
In contrast to traditional X‐ray photoelectron spectroscopy (XPS), hard X‐ray photoelectron spectroscopy (HAXPES) can provide information from deeper within a sample while maintaining chemical resolution. However, working with higher energy X‐rays introduces a series of new or different issues ranging from energy calibration to factors associated with quantitative analysis. As part of the efforts to identify and increase community awareness about these issues, a workshop was held to review HAXPES metrology challenges with the perspective of converting it into a quantitative technique. A summary is hereby given of this workshop, which was entitled “What New Challenges Come with the Capabilities of HAXPES?” It was held in Portland, OR, USA, on November 7, 2023, and was primarily sponsored by the ASTM E42 Committee and the Applied Surface Science Division of the American Vacuum Society. This report contains summaries of the presentations and discussions at this workshop regarding the current open problems in HAXPES metrology. There were 20 participants at the workshop.
与传统的 X 射线光电子能谱（XPS）相比，硬 X 射线光电子能谱（HAXPES）可以在保持化学分辨率的同时提供样品内部更深层的信息。然而，使用能量更高的 X 射线会带来一系列新的或不同的问题，从能量校准到定量分析的相关因素。为了查明这些问题并提高社会对这些问题的认识，举办了一次研讨会，从将 HAXPES 转化为定量技术的角度，审查 HAXPES 计量方面的挑战。该研讨会的主题是 "HAXPES 的能力带来了哪些新挑战？"，特此摘要介绍。研讨会于 2023 年 11 月 7 日在美国俄勒冈州波特兰市举行，主要由 ASTM E42 委员会和美国真空学会应用表面科学部主办。本报告包含研讨会上关于 HAXPES 计量学当前未决问题的发言和讨论摘要。共有 20 人参加了此次研讨会。
{"title":"New challenges associated with hard X‐ray photoelectron spectroscopy (report on the 2023 ASTM E42‐ASSD AVS workshop)","authors":"Alberto Herrera‐Gomez, David J. H. Cant, Thierry Conard, Olivier Renault, Matthew R. Linford, Joshua W. Pinder, Jeff Fenton, Donald R. Baer","doi":"10.1002/sia.7340","DOIUrl":"https://doi.org/10.1002/sia.7340","url":null,"abstract":"In contrast to traditional X‐ray photoelectron spectroscopy (XPS), hard X‐ray photoelectron spectroscopy (HAXPES) can provide information from deeper within a sample while maintaining chemical resolution. However, working with higher energy X‐rays introduces a series of new or different issues ranging from energy calibration to factors associated with quantitative analysis. As part of the efforts to identify and increase community awareness about these issues, a workshop was held to review HAXPES metrology challenges with the perspective of converting it into a quantitative technique. A summary is hereby given of this workshop, which was entitled “What New Challenges Come with the Capabilities of HAXPES?” It was held in Portland, OR, USA, on November 7, 2023, and was primarily sponsored by the ASTM E42 Committee and the Applied Surface Science Division of the American Vacuum Society. This report contains summaries of the presentations and discussions at this workshop regarding the current open problems in HAXPES metrology. There were 20 participants at the workshop.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":"75 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141528834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to improve the mechanical properties of the ultra‐high molecular weight polyethylene (UHMWPE) fiber‐reinforced high‐density polyethylene (HDPE) composite, carbon nanotube (CNT) was grafted on the UHMWPE fiber. The UHMWPE fiber/HDPE composite was prepared by injection molding process, and the effects of CNT contents on the mechanical properties of composite materials were studied. The results show that the mass fraction of CNT will significantly affect the mechanical properties of the composite. When the CNT content is 4 wt%, the tensile strength, tensile modulus, flexural strength, flexural modulus, and impact strength of the UHMWPE fiber/treated CNT/HDPE composite increased compared to the UHMWPE fiber/CNT/HDPE composite and UHMWPE fiber/HDPE composite. When the CNT content is 4 wt%, the above‐mentioned performance is the best. Pull‐out and fracture, bridging effect, and crack deflection effect are the main mechanisms of CNTs in UHMWPE fiber/HDPE composites. This study provides new insights into the interface design of UHMWPE fiber/HDPE composites and paves the way for their further development.
{"title":"The effect of CNT grafting on the mechanical properties of the UHMWPE fiber/HDPE composite","authors":"Li Jian, Xu Gaofeng","doi":"10.1002/sia.7339","DOIUrl":"https://doi.org/10.1002/sia.7339","url":null,"abstract":"In order to improve the mechanical properties of the ultra‐high molecular weight polyethylene (UHMWPE) fiber‐reinforced high‐density polyethylene (HDPE) composite, carbon nanotube (CNT) was grafted on the UHMWPE fiber. The UHMWPE fiber/HDPE composite was prepared by injection molding process, and the effects of CNT contents on the mechanical properties of composite materials were studied. The results show that the mass fraction of CNT will significantly affect the mechanical properties of the composite. When the CNT content is 4 wt%, the tensile strength, tensile modulus, flexural strength, flexural modulus, and impact strength of the UHMWPE fiber/treated CNT/HDPE composite increased compared to the UHMWPE fiber/CNT/HDPE composite and UHMWPE fiber/HDPE composite. When the CNT content is 4 wt%, the above‐mentioned performance is the best. Pull‐out and fracture, bridging effect, and crack deflection effect are the main mechanisms of CNTs in UHMWPE fiber/HDPE composites. This study provides new insights into the interface design of UHMWPE fiber/HDPE composites and paves the way for their further development.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":"68 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141501709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Vincent Fernandez, Neal Fairley, David Morgan, Pascal Bargiela, Jonas Baltrusaitis
Quantification of X‐ray photoelectron spectroscopy (XPS) data is often limited by the heterogeneous nature of the material surface. However, it is often the case that heterogeneous material contains areas within the analyzed area that are effectively homogeneous. In this Insight note, concepts, and methods used to analyze both XPS data are presented to extract both spatial and spectral information from heterogeneous surfaces. These concepts and methods are applied to a specific material surface that contains three chemical compounds separated spatially. The analysis entails converting XPS image data to spectral data and is designed to highlight the potential of XPS imaging in revealing compositional information correlation with spatial information. Properties of algorithms used to evaluate XPS images and spectra are described to outline their application to image data. A case study of an imaging XPS data set is presented that demonstrates how poor signal‐to‐noise images, where the signal is recorded for 4 s per image, are still open to analysis yielding useful information. Ultimately, the methods presented here will aid in interpreting complex XPS data obtained from spatially complex materials often obtained during extensive cycling, such as conventional or electrocatalysts.
{"title":"Surface science insight note: Imaging X‐ray photoelectron spectroscopy","authors":"Vincent Fernandez, Neal Fairley, David Morgan, Pascal Bargiela, Jonas Baltrusaitis","doi":"10.1002/sia.7337","DOIUrl":"https://doi.org/10.1002/sia.7337","url":null,"abstract":"Quantification of X‐ray photoelectron spectroscopy (XPS) data is often limited by the heterogeneous nature of the material surface. However, it is often the case that heterogeneous material contains areas within the analyzed area that are effectively homogeneous. In this <jats:italic>Insight</jats:italic> note, concepts, and methods used to analyze both XPS data are presented to extract both spatial and spectral information from heterogeneous surfaces. These concepts and methods are applied to a specific material surface that contains three chemical compounds separated spatially. The analysis entails converting XPS image data to spectral data and is designed to highlight the potential of XPS imaging in revealing compositional information correlation with spatial information. Properties of algorithms used to evaluate XPS images and spectra are described to outline their application to image data. A case study of an imaging XPS data set is presented that demonstrates how poor signal‐to‐noise images, where the signal is recorded for 4 s per image, are still open to analysis yielding useful information. Ultimately, the methods presented here will aid in interpreting complex XPS data obtained from spatially complex materials often obtained during extensive cycling, such as conventional or electrocatalysts.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":"43 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141198508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, we introduce a comprehensive investigation into the buckling behavior of carbon nanotubes (CNTs) using a combined approach of quantum mechanics and molecular mechanics methods. A novel aspect of our research lies in the exploration of the quantum effects of fine scaling on the buckling behavior of finite‐length nanotubes across various dimensions and chiralities. Specifically, we analyze the critical buckling strain variations in CNTs with distinct lengths, diameters, and chiralities, revealing pronounced differences influenced by atomic arrangement and the type of structure used in nanotube construction. Our findings elucidate that at smaller dimensions, nanotubes exhibit a higher critical buckling strain than other chiralities, while zigzag atomic arrangements demonstrate greater resistance to torsional loading at larger diameters. Additionally, we compare the buckling behavior of nanotubes obtained by wrapping armchair and zigzag nanosheets, highlighting differential resistance trends. This research not only underscores the critical role of quantum effects in determining nanotube buckling but also provides valuable insights into the nuanced influences of atomic arrangement and nanosheet type on the mechanical properties of CNTs. Thus, our work contributes a novel perspective to the field, bridging the gap between quantum mechanics and the mechanical behavior of nanostructures, which has significant implications for the design and application of nanoscale materials
{"title":"Studying quantum effects of fine scaling on the buckling behavior of CNTs under torsional loading using the density functional theory and molecular mechanics approach","authors":"Mahdi Mirnezhad, Reza Ansari, Seyed Reza Falahatgar, Peyman Aghdasi","doi":"10.1002/sia.7336","DOIUrl":"https://doi.org/10.1002/sia.7336","url":null,"abstract":"In this study, we introduce a comprehensive investigation into the buckling behavior of carbon nanotubes (CNTs) using a combined approach of quantum mechanics and molecular mechanics methods. A novel aspect of our research lies in the exploration of the quantum effects of fine scaling on the buckling behavior of finite‐length nanotubes across various dimensions and chiralities. Specifically, we analyze the critical buckling strain variations in CNTs with distinct lengths, diameters, and chiralities, revealing pronounced differences influenced by atomic arrangement and the type of structure used in nanotube construction. Our findings elucidate that at smaller dimensions, nanotubes exhibit a higher critical buckling strain than other chiralities, while zigzag atomic arrangements demonstrate greater resistance to torsional loading at larger diameters. Additionally, we compare the buckling behavior of nanotubes obtained by wrapping armchair and zigzag nanosheets, highlighting differential resistance trends. This research not only underscores the critical role of quantum effects in determining nanotube buckling but also provides valuable insights into the nuanced influences of atomic arrangement and nanosheet type on the mechanical properties of CNTs. Thus, our work contributes a novel perspective to the field, bridging the gap between quantum mechanics and the mechanical behavior of nanostructures, which has significant implications for the design and application of nanoscale materials","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":"41 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141195493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, a new type of green corrosion inhibitor, namely, sodium humate (SH), was extracted from humus soil, which is a natural humus plant, by dissolution‐neutralization, and then used for corrosion inhibition of low carbon steel in seawater. The corrosion inhibition performance of SH on low carbon steel EH40 in seawater was tested by weight loss method and electrochemical technology. The surface and corrosion products of low carbon steel were observed and analyzed by scanning electron microscope (SEM), atomic force microscope (AFM), contact angle and X‐ray photoelectron spectroscopy (XPS). The results show that SH is a mixed corrosion inhibitor, and the optimum concentration is 2 g L−1. At this concentration, the inhibition rate can reach 93.6%. It mainly affects the semi‐reaction of cathodic corrosion. By forming a corrosion protection layer with uniform adsorption on the surface of EH40 steel, EH40 steel becomes more resistant to seawater corrosion.
本研究采用溶解-中和的方法，从天然腐殖质植物--腐殖土中提取了一种新型绿色缓蚀剂--腐殖酸钠（SH），并将其用于海水中低碳钢的缓蚀。采用失重法和电化学技术测试了 SH 对海水中低碳钢 EH40 的缓蚀性能。通过扫描电子显微镜（SEM）、原子力显微镜（AFM）、接触角和 X 射线光电子能谱（XPS）对低碳钢的表面和腐蚀产物进行了观察和分析。结果表明，SH 是一种混合缓蚀剂，最佳浓度为 2 g L-1。在此浓度下，抑制率可达 93.6%。它主要影响阴极腐蚀的半反应。通过在 EH40 钢表面形成均匀吸附的腐蚀保护层，提高了 EH40 钢的耐海水腐蚀能力。
{"title":"Humic acid as eco‐friendly corrosion inhibitor for EH40 ship plate steel","authors":"Sizhu Wang, Zhipeng Liang, Yiyong Wang, Hui Jin, Shengli Li, Rui Guan","doi":"10.1002/sia.7335","DOIUrl":"https://doi.org/10.1002/sia.7335","url":null,"abstract":"In this study, a new type of green corrosion inhibitor, namely, sodium humate (SH), was extracted from humus soil, which is a natural humus plant, by dissolution‐neutralization, and then used for corrosion inhibition of low carbon steel in seawater. The corrosion inhibition performance of SH on low carbon steel EH40 in seawater was tested by weight loss method and electrochemical technology. The surface and corrosion products of low carbon steel were observed and analyzed by scanning electron microscope (SEM), atomic force microscope (AFM), contact angle and X‐ray photoelectron spectroscopy (XPS). The results show that SH is a mixed corrosion inhibitor, and the optimum concentration is 2 g L<jats:sup>−1</jats:sup>. At this concentration, the inhibition rate can reach 93.6%. It mainly affects the semi‐reaction of cathodic corrosion. By forming a corrosion protection layer with uniform adsorption on the surface of EH40 steel, EH40 steel becomes more resistant to seawater corrosion.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":"160 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141147289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Current study presents a novel hybrid approach combining finite element modeling and density functional theory calculations to investigate the mechanical properties of monolayer puckered arsenene. The multiscale analysis in this study leverages finite element analysis as a distinctive approach, complementing the nano‐scale capabilities of density functional theory and molecular dynamics by overcoming limitations faced by these two methods in representing complex scenarios. Furthermore, finite element analysis demonstrates computational efficiency for larger structures, making it suitable for systems where atomistic simulations may be impractical. This hybrid methodology offers a unique framework for accurately predicting key properties, including elastic modulus and buckling force, by synergistically integrating the strengths of both computational techniques. In addition to demonstrating the effectiveness of our approach in accurately capturing material behavior, our findings shed light on fundamental aspects of nanoscale mechanics, with implications for various applications in nanotechnology, materials science, and structural engineering. By providing a deeper understanding of the mechanical response of 2D materials, our research contributes to advancing the field of nanoscale materials engineering and informs the design of innovative nanostructures with tailored mechanical properties.
{"title":"Innovative modeling of monolayer puckered arsenene: Bridging quantum mechanics and finite element analysis","authors":"Peyman Aghdasi, Shayesteh Yousefi, Reza Ansari","doi":"10.1002/sia.7319","DOIUrl":"https://doi.org/10.1002/sia.7319","url":null,"abstract":"Current study presents a novel hybrid approach combining finite element modeling and density functional theory calculations to investigate the mechanical properties of monolayer puckered arsenene. The multiscale analysis in this study leverages finite element analysis as a distinctive approach, complementing the nano‐scale capabilities of density functional theory and molecular dynamics by overcoming limitations faced by these two methods in representing complex scenarios. Furthermore, finite element analysis demonstrates computational efficiency for larger structures, making it suitable for systems where atomistic simulations may be impractical. This hybrid methodology offers a unique framework for accurately predicting key properties, including elastic modulus and buckling force, by synergistically integrating the strengths of both computational techniques. In addition to demonstrating the effectiveness of our approach in accurately capturing material behavior, our findings shed light on fundamental aspects of nanoscale mechanics, with implications for various applications in nanotechnology, materials science, and structural engineering. By providing a deeper understanding of the mechanical response of 2D materials, our research contributes to advancing the field of nanoscale materials engineering and informs the design of innovative nanostructures with tailored mechanical properties.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":"81 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lars P. H. Jeurgens, Claudia Cancellieri, Andreas Borgschulte, John F. Watts
{"title":"Advancements and challenges of HAXPES for materials sciences and technologies","authors":"Lars P. H. Jeurgens, Claudia Cancellieri, Andreas Borgschulte, John F. Watts","doi":"10.1002/sia.7318","DOIUrl":"https://doi.org/10.1002/sia.7318","url":null,"abstract":"","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":"2016 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The selective flotation separation of gypsum and quartz in phosphogypsum (PG) is an urgent problem that is very important for the high‐value utilization of PG. In the work, dodecyl amine hydrochloride (DH) was introduced as a collector for the selective flotation separation of gypsum and quartz. The flotation property and selective mechanism of DH on the surface of gypsum and quartz were researched by single mineral flotation experiments, Fourier transform attenuated total reflection infrared spectroscopy analyzer, zeta potential analyzer, X‐ray photoelectron spectrum, molecular dynamic (MD) simulation, etc. Additionally, H+ was introduced into the mineral‐water system simulated by MD to take into account the effect of acidic conditions on the adsorption of DH. The pre‐adsorption of H+ on the quartz surface under strongly acidic conditions hindered the electrostatic force adsorption of DH on the quartz surface. Furthermore, DH was adopted as a collector in the direct flotation recovery of gypsum from PG, and the gypsum concentrates with productivity of 69.85%, CaSO4·2H2O content of 96.33%, and whiteness of 55.00% were obtained. The SiO2 content in the gypsum concentrate decreased from 9.08% to 0.616%. It suggested that DH could serve as a promising collector in the selective separation of gypsum and quartz in PG via flotation.
{"title":"Selective flotation separation of gypsum and quartz using dodecyl amine hydrochloride as collector: Mechanism and application","authors":"Mengyao Qi, Weijun Peng, Wei Wang, Yijun Cao, Guixia Fan, Yukun Huang","doi":"10.1002/sia.7320","DOIUrl":"https://doi.org/10.1002/sia.7320","url":null,"abstract":"The selective flotation separation of gypsum and quartz in phosphogypsum (PG) is an urgent problem that is very important for the high‐value utilization of PG. In the work, dodecyl amine hydrochloride (DH) was introduced as a collector for the selective flotation separation of gypsum and quartz. The flotation property and selective mechanism of DH on the surface of gypsum and quartz were researched by single mineral flotation experiments, Fourier transform attenuated total reflection infrared spectroscopy analyzer, zeta potential analyzer, X‐ray photoelectron spectrum, molecular dynamic (MD) simulation, etc. Additionally, H<jats:sup>+</jats:sup> was introduced into the mineral‐water system simulated by MD to take into account the effect of acidic conditions on the adsorption of DH. The pre‐adsorption of H<jats:sup>+</jats:sup> on the quartz surface under strongly acidic conditions hindered the electrostatic force adsorption of DH on the quartz surface. Furthermore, DH was adopted as a collector in the direct flotation recovery of gypsum from PG, and the gypsum concentrates with productivity of 69.85%, CaSO<jats:sub>4</jats:sub>·2H<jats:sub>2</jats:sub>O content of 96.33%, and whiteness of 55.00% were obtained. The SiO<jats:sub>2</jats:sub> content in the gypsum concentrate decreased from 9.08% to 0.616%. It suggested that DH could serve as a promising collector in the selective separation of gypsum and quartz in PG via flotation.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":"1 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140938552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Surface plasmon resonance‐based fiber optic sensors with Ag‐SnO2 and Ag‐ZnS bi‐layers are proposed experimentally and compared in detail in terms of sensitivity. Effect of SnO2 and ZnS layer thicknesses on the sensitivity is examined. Largest sensitivities are achieved by sensors with 40 nm Ag‐10 nm SnO2 layers and 40 nm Ag‐10 nm ZnS layers. Sensor with 40 nm Ag‐10 nm SnO2 layers is found to demonstrate better sensitivity than that with 40 nm Ag‐10 nm ZnS layers.
{"title":"Surface plasmon resonance‐based fiber optic sensor utilizing tin oxide and zinc sulfide: An experimental analysis","authors":"Vicky Kapoor, Navneet K. Sharma","doi":"10.1002/sia.7317","DOIUrl":"https://doi.org/10.1002/sia.7317","url":null,"abstract":"Surface plasmon resonance‐based fiber optic sensors with Ag‐SnO<jats:sub>2</jats:sub> and Ag‐ZnS bi‐layers are proposed experimentally and compared in detail in terms of sensitivity. Effect of SnO<jats:sub>2</jats:sub> and ZnS layer thicknesses on the sensitivity is examined. Largest sensitivities are achieved by sensors with 40 nm Ag‐10 nm SnO<jats:sub>2</jats:sub> layers and 40 nm Ag‐10 nm ZnS layers. Sensor with 40 nm Ag‐10 nm SnO<jats:sub>2</jats:sub> layers is found to demonstrate better sensitivity than that with 40 nm Ag‐10 nm ZnS layers.","PeriodicalId":22062,"journal":{"name":"Surface and Interface Analysis","volume":"87 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140826540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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