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Zirconium-based MOF/MXene aerogel composite for highly stable and selective capture of uranium from aqueous solution
IF 6.7 2区 材料科学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2025-04-20 DOI: 10.1016/j.apsusc.2025.163323
Wenting Li, Wei Kang, Chengan Ye, Nina Wu, Feihong Wang, Huan Pang
Excessive discharge of uranyl ion (U(VI)-containing) wastewater poses significant environmental and human health risks due to radiological contamination. In this study, a metal–organic framework (MOF) exhibiting aerogel-like properties was synthesized by combining UiO-66-NH2 with MXene through a freeze-drying process. The research focused on the removal of U(VI) from aqueous solutions with this aerogel material. The adsorption isotherm was consistent with the Langmuir model, and the maximum adsorption capacity was determined to be 229.1 mg∙g−1. The aerogel-like MOF possesses a mesoporous structure, enhancing its U(VI) adsorption efficiency while enabling easy separation and maintaining structural integrity afterward. In cyclic adsorption–desorption experiments conducted over five cycles, the UiO-66-NH2/MXene adsorbent demonstrated a U(VI) removal efficiency exceeding 96 %. Overall, the aerogel-like MOF demonstrates outstanding U(VI) adsorption capacity and shows promise as an effective capacitive deionization (CDI) electrode for mitigating radiological contamination.
{"title":"Zirconium-based MOF/MXene aerogel composite for highly stable and selective capture of uranium from aqueous solution","authors":"Wenting Li, Wei Kang, Chengan Ye, Nina Wu, Feihong Wang, Huan Pang","doi":"10.1016/j.apsusc.2025.163323","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.163323","url":null,"abstract":"Excessive discharge of uranyl ion (U(VI)-containing) wastewater poses significant environmental and human health risks due to radiological contamination. In this study, a metal–organic framework (MOF) exhibiting aerogel-like properties was synthesized by combining UiO-66-NH<sub>2</sub> with MXene through a freeze-drying process. The research focused on the removal of U(VI) from aqueous solutions with this aerogel material. The adsorption isotherm was consistent with the Langmuir model, and the maximum adsorption capacity was determined to be 229.1 mg∙g<sup>−1</sup>. The aerogel-like MOF possesses a mesoporous structure, enhancing its U(VI) adsorption efficiency while enabling easy separation and maintaining structural integrity afterward. In cyclic adsorption–desorption experiments conducted over five cycles, the UiO-66-NH<sub>2</sub>/MXene adsorbent demonstrated a U(VI) removal efficiency exceeding 96 %. Overall, the aerogel-like MOF demonstrates outstanding U(VI) adsorption capacity and shows promise as an effective capacitive deionization (CDI) electrode for mitigating radiological contamination.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"137 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143853160","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-selectivity and high-sensitivity sensor for dibutylamine and diisopropylamine detection using ZnO nanoparticles with tetragonal dipyramidal morphology
IF 6.3 2区 材料科学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2025-04-20 DOI: 10.1016/j.apsusc.2025.163322
Ming-Chao Zhu , Guo-Li Chen , Kun Song , Jian-Jiao Xin , Xiao-Ming Huang
The simultaneous detection of the toxic gases Dibutylamine (DBA) and Diisopropylamine (DIPA) by ZnO has not been reported, making dual detection of these gases a challenge. In this paper, a tetragonal dipyramid-like ZnO precursor was prepared using a hydrothermal method, focusing on microstructural changes at different calcination temperatures and their effects on gas sensing performance. After calcination at 550 °C, tetragonal dipyramid-like ZnO (ZnOTD-550) was obtained, featuring two grooves that serve as “bridges” between the two tetragonal cones. The structure consists of uniform nanoparticles with a broad mesoporous distribution, high specific surface area, and abundant oxygen vacancies. These features collectively enable rapid gas reactions, enhancing sensor sensititity. The tetragonal dipyramid-like ZnO sensor exhibits an significant response to 100 ppm DBA at 133 °C (S = 300.6), and a comparable response to the same concentration of DIPA at 217 °C (S = 271.5). The ZnOTD-550 sensor also demonstrates a low detection limit, excellent long-term stability, reproducibility and humidity resistance for DBA/DIPA detection. This pioneering study reveals the capability of ZnO-based sensors for highly sensitivity and dual-selectivity detection of the toxic gases DBA and DIPA at distinct operating temperatures. In addition, the dual-sensitivity mechanisms have been thoroughly explored and analyzed.
{"title":"Dual-selectivity and high-sensitivity sensor for dibutylamine and diisopropylamine detection using ZnO nanoparticles with tetragonal dipyramidal morphology","authors":"Ming-Chao Zhu ,&nbsp;Guo-Li Chen ,&nbsp;Kun Song ,&nbsp;Jian-Jiao Xin ,&nbsp;Xiao-Ming Huang","doi":"10.1016/j.apsusc.2025.163322","DOIUrl":"10.1016/j.apsusc.2025.163322","url":null,"abstract":"<div><div>The simultaneous detection of the toxic gases Dibutylamine (DBA) and Diisopropylamine (DIPA) by ZnO has not been reported, making dual detection of these gases a challenge. In this paper, a tetragonal dipyramid-like ZnO precursor was prepared using a hydrothermal method, focusing on microstructural changes at different calcination temperatures and their effects on gas sensing performance. After calcination at 550 °C, tetragonal dipyramid-like ZnO (ZnO<sub>TD</sub>-550) was obtained, featuring two grooves that serve as “bridges” between the two tetragonal cones. The structure consists of uniform nanoparticles with a broad mesoporous distribution, high specific surface area, and abundant oxygen vacancies. These features collectively enable rapid gas reactions, enhancing sensor sensititity. The tetragonal dipyramid-like ZnO sensor exhibits an significant response to 100 ppm DBA at 133 °C (<em>S</em> = 300.6), and a comparable response to the same concentration of DIPA at 217 °C (<em>S</em> = 271.5). The ZnO<sub>TD</sub>-550 sensor also demonstrates a low detection limit, excellent long-term stability, reproducibility and humidity resistance for DBA/DIPA detection. This pioneering study reveals the capability of ZnO-based sensors for highly sensitivity and dual-selectivity detection of the toxic gases DBA and DIPA at distinct operating temperatures. In addition, the dual-sensitivity mechanisms have been thoroughly explored and analyzed.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"701 ","pages":"Article 163322"},"PeriodicalIF":6.3,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143853703","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
Carbon quantum dots implanted sulfonated 2D-MoS2 for hydrogen evolution
IF 6.7 2区 材料科学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2025-04-20 DOI: 10.1016/j.apsusc.2025.163315
Akash Sarkar, Gayathry Ganesh, Ummiya Qamar, Vivek Kumar Singh, Ruchi Sharma, Ankur Srivastava, Gunasekaran Venugopal, Rajan Jose, Santanu Das
We report the enhancement of electrocatalytic activity in sulfonate (−SO3H) group functionalized two-dimensional molybdenum disulfide (2D-s-MoS2) nanosheets for their use in hydrogen evolution reaction (HER). These as-developed nanosheets have been decorated with sustainable biomass-derived carbon quantum dots (CQDs) via a sonochemical method, creating a s-MoS2-CQD composite material. This innovative composite demonstrates significantly improved electrocatalytic performance for the hydrogen evolution reaction (HER) via water splitting. In particular, incorporating CQDs on 2D-s-MoS2 overcomes many limitations, as observed in pristine 2D-MoS2 and 2D-s-MoS2, especially regarding low electrical conductivity and restricted electrocatalytic activity on the basal plane. Incorporating CQDs enhances electron transfer efficiency, increases the availability of active sites, and enhances overall conductivity. As a result, the s-MoS2-CQD achieves remarkable HER performance, featuring a lower overpotential of ∼ 273 mV and a reduced Tafel slope of 67 mV/dec compared to s-MoS2. These enhancements signify faster reaction kinetics, accelerated H* adsorption–desorption, and greater catalytic efficiency. Furthermore, using sustainably synthesized CQDs positions this approach as a cost-effective, scalable, and environmentally friendly alternative to traditional noble-metal catalysts. This research highlights the potential of functionalized two-dimensional materials, such as s-MoS2, implanted with zero-dimensional materials, such as CQDs, to advance sustainable hydrogen production technologies, thereby contributing to the global shift towards clean energy solutions.
{"title":"Carbon quantum dots implanted sulfonated 2D-MoS2 for hydrogen evolution","authors":"Akash Sarkar, Gayathry Ganesh, Ummiya Qamar, Vivek Kumar Singh, Ruchi Sharma, Ankur Srivastava, Gunasekaran Venugopal, Rajan Jose, Santanu Das","doi":"10.1016/j.apsusc.2025.163315","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.163315","url":null,"abstract":"We report the enhancement of electrocatalytic activity in sulfonate (−SO<sub>3</sub>H) group functionalized two-dimensional molybdenum disulfide (2D-s-MoS<sub>2</sub>) nanosheets for their use in hydrogen evolution reaction (HER). These as-developed nanosheets have been decorated with sustainable biomass-derived carbon quantum dots (CQDs) via a sonochemical method, creating a s-MoS<sub>2</sub>-CQD composite material. This innovative composite demonstrates significantly improved electrocatalytic performance for the hydrogen evolution reaction (HER) via water splitting. In particular, incorporating CQDs on 2D-s-MoS<sub>2</sub> overcomes many limitations, as observed in pristine 2D-MoS<sub>2</sub> and 2D-s-MoS<sub>2</sub>, especially regarding low electrical conductivity and restricted electrocatalytic activity on the basal plane. Incorporating CQDs enhances electron transfer efficiency, increases the availability of active sites, and enhances overall conductivity. As a result, the s-MoS<sub>2</sub>-CQD achieves remarkable HER performance, featuring a lower overpotential of ∼ 273 mV and a reduced Tafel slope of 67 mV/dec compared to s-MoS<sub>2</sub>. These enhancements signify faster reaction kinetics, accelerated <em>H*</em> adsorption–desorption, and greater catalytic efficiency. Furthermore, using sustainably synthesized CQDs positions this approach as a cost-effective, scalable, and environmentally friendly alternative to traditional noble-metal catalysts. This research highlights the potential of functionalized two-dimensional materials, such as s-MoS<sub>2</sub>, implanted with zero-dimensional materials, such as CQDs, to advance sustainable hydrogen production technologies, thereby contributing to the global shift towards clean energy solutions.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"65 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143853235","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
Catalyst-free synthesis and deposition mechanism of vertically oriented graphene on aluminum foil using PECVD
IF 6.3 2区 材料科学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2025-04-20 DOI: 10.1016/j.apsusc.2025.163314
Zheqiong Fan , Cong Chen , Fenghong Li , Chaozong Liu , Bo Liu , Zhihui Zhang
The catalyst-free growth of vertically oriented graphene (VG) networks with growth rate of about 5 nm/min on commercial aluminum (Al) foil via radio frequency plasma-enhanced chemical vapor deposition (RF-PECVD) is reported. The effects of process parameters, including precursor type and deposition temperature, on VG synthesis were systematically investigated. The deposition temperature plays a decisive role in the formation of VGs, while the precursor primarily influences growth rate and crystallinity. VGs were synthesized using either ethylene (C2H4) or propylene (C3H6) as precursors, but formation does not occur at lower temperatures (e.g., 500 °C). Precursors that effectively generate carbon dimers and exhibit a higher H:C ratio are more favorable for achieving VGs with high growth rates and superior crystallinity. Furthermore, we proposed a deposition mechanism that encompasses both the growth of VGs on the Al foil surface and the diffusion of carbon atoms into the Al foil. The growth process of VGs follows three distinct stages: the formation of buffer carbon nanoislands, nucleation, and subsequent growth. X-ray photoelectron spectroscopy (XPS) revealed the chemical interactions between carbon, AlxOy, and metallic Al at the interface, resulting in a diffusion layer and an interface layer between the VG layer and the underlying Al substrate.
{"title":"Catalyst-free synthesis and deposition mechanism of vertically oriented graphene on aluminum foil using PECVD","authors":"Zheqiong Fan ,&nbsp;Cong Chen ,&nbsp;Fenghong Li ,&nbsp;Chaozong Liu ,&nbsp;Bo Liu ,&nbsp;Zhihui Zhang","doi":"10.1016/j.apsusc.2025.163314","DOIUrl":"10.1016/j.apsusc.2025.163314","url":null,"abstract":"<div><div>The catalyst-free growth of vertically oriented graphene (VG) networks with growth rate of about 5 nm/min on commercial aluminum (Al) foil via radio frequency plasma-enhanced chemical vapor deposition (RF-PECVD) is reported. The effects of process parameters, including precursor type and deposition temperature, on VG synthesis were systematically investigated. The deposition temperature plays a decisive role in the formation of VGs, while the precursor primarily influences growth rate and crystallinity. VGs were synthesized using either ethylene (C<sub>2</sub>H<sub>4</sub>) or propylene (C<sub>3</sub>H<sub>6</sub>) as precursors, but formation does not occur at lower temperatures (e.g., 500 °C). Precursors that effectively generate carbon dimers and exhibit a higher H:C ratio are more favorable for achieving VGs with high growth rates and superior crystallinity. Furthermore, we proposed a deposition mechanism that encompasses both the growth of VGs on the Al foil surface and the diffusion of carbon atoms into the Al foil. The growth process of VGs follows three distinct stages: the formation of buffer carbon nanoislands, nucleation, and subsequent growth. X-ray photoelectron spectroscopy (XPS) revealed the chemical interactions between carbon, Al<sub>x</sub>O<sub>y</sub>, and metallic Al at the interface, resulting in a diffusion layer and an interface layer between the VG layer and the underlying Al substrate.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"701 ","pages":"Article 163314"},"PeriodicalIF":6.3,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143853159","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
Optimizing thermal oxidation temperature for enhanced structural and electrical properties of Ho2O3 ultrathin-film gate dielectric on Ge semiconductor substrate
IF 6.3 2区 材料科学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2025-04-19 DOI: 10.1016/j.apsusc.2025.163224
Tahsin Ahmed Mozaffor Onik , Chia Ching Kee , Yung Cheng Wong , Ahmad Hafiz Jafarul Tarek , Prastika Krisma Jiwanti , Yew Hoong Wong
This study systematically characterized the structural, morphological and electrical properties of sputtered Ho/Ge interface after subsequent thermal oxidation in O2 ambient varying deposition temperature from 450 °C–550 °C for metal oxide semiconductor capacitor (MOSCAP) device. The XRD analysis confirmed presence of cubic c-Ho2O3 and tetragonal and cubic GeO2 while the effect of crystallite size and micro-strain on electrical performance has been reported. As observed in XPS, 500 °C thermal oxidation condition has been conducive for exhibiting more stoichiometric phase of Ho2O3. This condition helped to limit irregular O diffusion toward substrate facilitating more controlled Ge activation and minimized uneven intermixing. Thereby, inhibited unstable interfacial (IL) layer sub-oxides, GeOx resulting more stable and compact interface Ho2O3/ IL (GeO2 + GeOx). However, thermal budget of 550 °C led thicker interfacial layer due to over-oxidation corresponding severely defected Ho2O3/(GeO2 + GeOx) interface degrading device operation. HRTEM further confirmed double stacked amorphous Ho2O3/IL structure ranging physical thickness from 7.04–10 nm. The reduction of structural defect at optimum oxidation condition 500 °C imposed a conduction band offset of 1.77 eV which impeded uneven electron transportation from Ge CB edge into the interface of Ho2O3/IL leading enhanced electrical breakdown at Jg 10-6 Acm−2 withstanding electrical breakdown field, EBD 7.93 MVcm−1. Therefore, controlling the temperature set up for oxidized Ho/Ge could offer thinner GeOx layer improving the k 12.54 corresponding EOT 2.65 nm while reducing Qeff and Qit and Dit 1012 eV−1 cm−2. In outline, Ho2O3 is projected to be a potential candidate as dielectric insulator for Ge-based MOSCAP devices.
{"title":"Optimizing thermal oxidation temperature for enhanced structural and electrical properties of Ho2O3 ultrathin-film gate dielectric on Ge semiconductor substrate","authors":"Tahsin Ahmed Mozaffor Onik ,&nbsp;Chia Ching Kee ,&nbsp;Yung Cheng Wong ,&nbsp;Ahmad Hafiz Jafarul Tarek ,&nbsp;Prastika Krisma Jiwanti ,&nbsp;Yew Hoong Wong","doi":"10.1016/j.apsusc.2025.163224","DOIUrl":"10.1016/j.apsusc.2025.163224","url":null,"abstract":"<div><div>This study systematically characterized the structural, morphological and electrical properties of sputtered Ho/Ge interface after subsequent thermal oxidation in O<sub>2</sub> ambient varying deposition temperature from 450 °C–550 °C for metal oxide semiconductor capacitor (MOSCAP) device. The XRD analysis confirmed presence of cubic c-Ho<sub>2</sub>O<sub>3</sub> and tetragonal and cubic GeO<sub>2</sub> while the effect of crystallite size and micro-strain on electrical performance has been reported. As observed in XPS, 500 °C thermal oxidation condition has been conducive for exhibiting more stoichiometric phase of Ho<sub>2</sub>O<sub>3</sub>. This condition helped to limit irregular O diffusion toward substrate facilitating more controlled Ge activation and minimized uneven intermixing. Thereby, inhibited unstable interfacial (IL) layer sub-oxides, GeO<sub>x</sub> resulting more stable and compact interface Ho<sub>2</sub>O<sub>3</sub>/ IL (GeO<sub>2</sub> + GeO<sub>x</sub>). However, thermal budget of 550 °C led thicker interfacial layer due to over-oxidation corresponding severely defected Ho<sub>2</sub>O<sub>3</sub>/(GeO<sub>2</sub> + GeO<sub>x</sub>) interface degrading device operation. HRTEM further confirmed double stacked amorphous Ho<sub>2</sub>O<sub>3</sub>/IL structure ranging physical thickness from 7.04–10 nm. The reduction of structural defect at optimum oxidation condition 500 °C imposed a conduction band offset of 1.77 eV which impeded uneven electron transportation from Ge CB edge into the interface of Ho<sub>2</sub>O<sub>3</sub>/IL leading enhanced electrical breakdown at <span><math><mrow><msub><mi>J</mi><mi>g</mi></msub><mspace></mspace></mrow></math></span> 10<sup>-6</sup> Acm<sup>−2</sup> withstanding electrical breakdown field, <span><math><mrow><msub><mi>E</mi><mrow><mi>BD</mi></mrow></msub><mspace></mspace></mrow></math></span> 7.93 MVcm<sup>−1</sup>. Therefore, controlling the temperature set up for oxidized Ho/Ge could offer thinner GeO<sub>x</sub> layer improving the <span><math><mi>k</mi></math></span> 12.54 corresponding EOT 2.65 nm while reducing <span><math><msub><mi>Q</mi><mrow><mi>eff</mi></mrow></msub></math></span> and <span><math><msub><mi>Q</mi><mrow><mi>it</mi></mrow></msub></math></span> and <span><math><msub><mi>D</mi><mrow><mi>it</mi></mrow></msub></math></span> 10<sup>12</sup> eV<sup>−1</sup> cm<sup>−2</sup>. In outline, Ho<sub>2</sub>O<sub>3</sub> is projected to be a potential candidate as dielectric insulator for Ge-based MOSCAP devices.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"701 ","pages":"Article 163224"},"PeriodicalIF":6.3,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143853705","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
Twins and dark features in MPCVD diamond films
IF 6.3 2区 材料科学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2025-04-19 DOI: 10.1016/j.apsusc.2025.163222
Lijun Li , Kang An , Guangyu Xu , Haiping Wu , Zhiliang Yang , Zuoshuai Xi , Peng Liu , Yongkang Zhang , Yachen Zhang , Xufang Zhang , Hong Li , Xiongbo Yan , Fengbin Liu , Chengming Li
In this study, diamond films were prepared by Microwave Plasma Chemical Vapor Deposition (MPCVD). The twins, dark features, pores, and their surface relationships were investigated, with a focus on the crystallographic transition within fivefold twins, the growth characteristics of distinct film regions and dark features, and the mechanisms of pore formation. The samples were characterized using SEM, XRD, Raman spectroscopy, EBSD, Optical microscopy, and Laser confocal microscopy, complemented by first-principles calculations and molecular dynamics simulations.
It is demonstrated that Σ3 twins, fivefold twins, and parallel twins all constitute Σ3 twin boundaries, among other types of twin boundaries, and ∑3 twins, fivefold twins and parallel twins are contact twins. It is revealed that the transformation of the crystal planes is due to energy fluctuations, and the results show that the dark features are mainly composed of growth pores, and the regions with more dark features are often accompanied by a greater number of pores. In addition, it is revealed that the growth pores are mainly formed under the influence of twins, which may lead to different growth rates of crystal planes and atomic misalignment, both of which may promote the formation of growth pores, but the first formation mechanism is predominant.
{"title":"Twins and dark features in MPCVD diamond films","authors":"Lijun Li ,&nbsp;Kang An ,&nbsp;Guangyu Xu ,&nbsp;Haiping Wu ,&nbsp;Zhiliang Yang ,&nbsp;Zuoshuai Xi ,&nbsp;Peng Liu ,&nbsp;Yongkang Zhang ,&nbsp;Yachen Zhang ,&nbsp;Xufang Zhang ,&nbsp;Hong Li ,&nbsp;Xiongbo Yan ,&nbsp;Fengbin Liu ,&nbsp;Chengming Li","doi":"10.1016/j.apsusc.2025.163222","DOIUrl":"10.1016/j.apsusc.2025.163222","url":null,"abstract":"<div><div>In this study, diamond films were prepared by Microwave Plasma Chemical Vapor Deposition (MPCVD). The twins, dark features, pores, and their surface relationships were investigated, with a focus on the crystallographic transition within fivefold twins, the growth characteristics of distinct film regions and dark features, and the mechanisms of pore formation. The samples were characterized using SEM, XRD, Raman spectroscopy, EBSD, Optical microscopy, and Laser confocal microscopy, complemented by first-principles calculations and molecular dynamics simulations.</div><div>It is demonstrated that Σ3 twins, fivefold twins, and parallel twins all constitute Σ3 twin boundaries, among other types of twin boundaries, and ∑3 twins, fivefold twins and parallel twins are contact twins. It is revealed that the transformation of the crystal planes is due to energy fluctuations, and the results show that the dark features are mainly composed of growth pores, and the regions with more dark features are often accompanied by a greater number of pores. In addition, it is revealed that the growth pores are mainly formed under the influence of twins, which may lead to different growth rates of crystal planes and atomic misalignment, both of which may promote the formation of growth pores, but the first formation mechanism is predominant.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"701 ","pages":"Article 163222"},"PeriodicalIF":6.3,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143849748","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
Surface oxygen vacancy regulation via Li-doped in MOF-derived mesoporous TiO2 for printable mesoscopic perovskite solar cells
IF 6.7 2区 材料科学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2025-04-19 DOI: 10.1016/j.apsusc.2025.163316
Hang Yang, Zhongge Luo, Boxue Wang, Ke Wang, Jianhong Zhao, Jin Zhang, Yuming Zhang, Qingju Liu
The mesoporous TiO2 displays low conductivity and abundant oxygen vacancies (OVs) defects, leading to reduced carrier extraction and affecting the power conversion efficiency (PCE) of perovskite solar cells (PSCs). In this study, we investigate the electron transport layer of mesoporous TiO2 derived from Ti-MOFs with Li-doped, employing a strategy to regulate the OVs on the TiO2 surface to enhance device performance. Experimental results demonstrate that Li doping increases the conductivity of TiO2, improves the energy level alignment between the TiO2 and perovskite interfaces, and alleviates the residual stress in the perovskite. Theoretical calculations indicate that Li doping can inhibit the formation of OVs, reduce the band gap of TiO2, and decrease the surface energy of the interface, thereby enhancing carrier extraction. Ultimately, carbon-based printable mesoscopic PSCs by Li-doped exhibit a higher PCE of 18.07 % and improved long-term stability.
{"title":"Surface oxygen vacancy regulation via Li-doped in MOF-derived mesoporous TiO2 for printable mesoscopic perovskite solar cells","authors":"Hang Yang, Zhongge Luo, Boxue Wang, Ke Wang, Jianhong Zhao, Jin Zhang, Yuming Zhang, Qingju Liu","doi":"10.1016/j.apsusc.2025.163316","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.163316","url":null,"abstract":"The mesoporous TiO<sub>2</sub> displays low conductivity and abundant oxygen vacancies (OVs) defects, leading to reduced carrier extraction and affecting the power conversion efficiency (PCE) of perovskite solar cells (PSCs). In this study, we investigate the electron transport layer of mesoporous TiO<sub>2</sub> derived from Ti-MOFs with Li-doped, employing a strategy to regulate the OVs on the TiO<sub>2</sub> surface to enhance device performance. Experimental results demonstrate that Li doping increases the conductivity of TiO<sub>2</sub>, improves the energy level alignment between the TiO<sub>2</sub> and perovskite interfaces, and alleviates the residual stress in the perovskite. Theoretical calculations indicate that Li doping can inhibit the formation of OVs, reduce the band gap of TiO<sub>2</sub>, and decrease the surface energy of the interface, thereby enhancing carrier extraction. Ultimately, carbon-based printable mesoscopic PSCs by Li-doped exhibit a higher PCE of 18.07 % and improved long-term stability.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"125 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143853726","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
Functionalization of a clay mineral with Sn species for anti-inflammatory removal
IF 6.7 2区 材料科学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2025-04-19 DOI: 10.1016/j.apsusc.2025.163313
Lucilane Gomes Oliveira, Denise Brito França, Luis Humberto Oliveira, Josy Anteveli Osajima, Edson Cavalcanti da Silva-Filho, Ignacio Sainz-Díaz, Santiago Medina-Carrasco, Maria del Mar Orta Cuevas, Maria Gardênnia Fonseca
Diclofenac is one of the most detected drugs in aquatic environments, however, it can be removed through adsorption. In the present study, sodium bentonite (Na-Bent) was functionalized with an Sn species by reaction between the clay and aqueous SnCl2 solutions (0.01, 0.05 and 0.10 mol L-1), and used as new adsorbents for diclofenac. X-ray diffraction patterns with Rietveld refinement analysis indicated the presence of hydrated SnO2 or Sn(OH)4 nanoparticles in the samples. SnO2 content in the samples were 12.8, 32.4, and 45.0 % for Sn0.01-, Sn0.05- and Sn0.10-Bent, respectively. The specific surface area of the samples increased, reaching 194 m2 g−1 for Sn0.1-Bent. X-ray photoelectron spectroscopy (XPS) suggested the presence of Sn (IV) species in Sn-Bent. The adsorption isotherms indicated high drug adsorption, reaching 106.1 and 105.5 mg g−1 for Sn0.05- and Sn0.10-Bent samples, respectively. Fourier transform infrared (FT-IR) spectroscopy and XPS analyses showed an interaction between the carboxylate group of diclofenac sodium and the Sn species in the Sn-Bent samples. Artemia salina tests indicated that Sn0.10-Bent was not toxic, and all samples showed good stability during diclofenac adsorption at pH 6. Therefore, Sn-Bent samples behaved as environmentally friendly adsorbents for the removal of diclofenac.
双氯芬酸是水生环境中检测到最多的药物之一,但它可以通过吸附去除。在本研究中,钠膨润土(Na-Bent)通过与 SnCl2 水溶液(0.01、0.05 和 0.10 mol L-1)反应,被一种 Sn 物种功能化,并被用作双氯芬酸的新型吸附剂。X 射线衍射图样和 Rietveld 精炼分析表明,样品中存在水合 SnO2 或 Sn(OH)4 纳米颗粒。Sn0.01-、Sn0.05- 和 Sn0.10-Bent 样品中的 SnO2 含量分别为 12.8%、32.4% 和 45.0%。样品的比表面积有所增加,Sn0.1-Bent 的比表面积达到 194 m2 g-1。X 射线光电子能谱(XPS)表明,Sn-Bent 中存在 Sn (IV) 物种。吸附等温线表明,Sn0.05-和 Sn0.10-Bent 样品的药物吸附量很高,分别达到 106.1 和 105.5 mg g-1。傅立叶变换红外光谱(FT-IR)和 XPS 分析表明,双氯芬酸钠的羧基与 Sn-Bent 样品中的 Sn 物质之间存在相互作用。盐蚯蚓测试表明,Sn0.10-Bent 无毒,而且所有样品在 pH 值为 6 的条件下吸附双氯芬酸时都表现出良好的稳定性。
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引用次数: 0
Study on the interlayer and interphase multiple coordination deformation mechanism of Fe-20.4Cr-4.7Mn-0.27N duplex stainless steel with gradient heterostructure
IF 6.3 2区 材料科学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2025-04-18 DOI: 10.1016/j.apsusc.2025.163309
Lingxiao Li , Tingsong Yang , Zhilei Liu , Yanfeng Feng , Xinjun Zhang , Miao Jin , Lei Chen , Kun Yang , Shuo Hao
In this work, ultrasonic rolling treatment was conducted on the surface (USRT) of the Fe-20.4Cr-4.7Mn-0.27N duplex stainless steel plate for 6 passes, its influences on the tensile deformation and damage behaviors were clarified by means of XRD, EBSD, TEM, SEM, etc. The results show that the USRT introduced gradient heterostructure layers with a total volume ratio of about 27 % in the Fe-20.4Cr-4.7Mn-0.27N steel, the α’bcc-martensite proportion increases from 0 % in the base-material core to 5 % on the USRT surface. This leaded to an improvement in yield strength of 125 MPa, an increase in ultimate tensile strength of 17 MPa and a decrease in total elongation of 20 %. Besides, a further increase in α’bcc-martensite proportion of 35 %–38 % was shown in austenite throughout the USRT specimen after tensile fracture. While in ferrite, the dislocation activity in the USRT layer was obviously weaker than that in the base-material core during tensile deformation. The complex coordination deformation behavior is closely associated with the plasticity partitioning difference between the heterogeneous phases and between the heterogeneous layers. This finally leaded to different damage characteristics on the USRT surface from that in the as-annealed specimen.
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引用次数: 0
Electrochemical deposition of graphene-doped polyaniline films for enhanced zinc corrosion resistance
IF 6.3 2区 材料科学 Q2 CHEMISTRY, PHYSICAL Pub Date : 2025-04-18 DOI: 10.1016/j.apsusc.2025.163311
A. Messabhia , H. Boudellioua , Y. Hamlaoui , F. Pedraza
Pure polyaniline (PANI), graphene-doped PANI (PANI-GR), and graphene nanoplatelet-doped PANI (PANI-GRNPs) coatings were electrodeposited galvanostatically from an aqueous solution of sodium salicylate and aniline onto zinc substrates. Graphene was obtained via the electrochemical exfoliation of graphite in an acidic medium. Prior to incorporation into the composites, both forms of graphene were dispersed in the surfactant SDS. The electrochemical behaviour of the bare and coated substrates was evaluated in 1 M NaCl. The study demonstrates that electrodeposition via galvanostatic mode is an effective method for coating zinc substrates with polyaniline (PANI) and PANI-graphene composites. Structural analyses using X-ray diffraction (XRD) and Raman spectroscopy confirmed the successful integration of graphene into the PANI matrix. The incorporation of graphene significantly improved the coating quality, enhancing surface homogeneity and minimizing the formation of surface cracks. Mechanical testing revealed that PANI-GR composite coatings exhibited superior microhardness compared to pure PANI and PANI-GRNPs coatings. The PANI-GR coatings outperformed the corrosion resistance of both bare zinc and pure PANI coatings. This enhanced corrosion resistance is attributed to the improved barrier properties, more noble corrosion potential, decreased anodic and cathodic branches and enhanced charge transfer mechanisms facilitated by graphene incorporation.
纯聚苯胺(PANI)、掺杂石墨烯的 PANI(PANI-GR)和掺杂石墨烯纳米颗粒的 PANI(PANI-GRNPs)涂层是从水杨酸钠和苯胺的水溶液中电沉积到锌基板上的。石墨烯是在酸性介质中通过电化学剥离石墨获得的。在加入复合材料之前,这两种形式的石墨烯都分散在表面活性剂 SDS 中。在 1 M NaCl 介质中对裸基底和涂层基底的电化学行为进行了评估。研究表明,通过电静电模式进行电沉积是在锌基底上涂覆聚苯胺(PANI)和 PANI-石墨烯复合材料的有效方法。利用 X 射线衍射 (XRD) 和拉曼光谱进行的结构分析证实了石墨烯与 PANI 基体的成功结合。石墨烯的加入大大改善了涂层质量,提高了表面均匀性,并最大限度地减少了表面裂纹的形成。机械测试表明,与纯 PANI 和 PANI-GRNPs 涂层相比,PANI-GR 复合涂层具有更高的显微硬度。PANI-GR 涂层的耐腐蚀性优于裸锌和纯 PANI 涂层。这种增强的耐腐蚀性能归因于石墨烯改进的阻隔性能、更惰性的腐蚀电位、减少的阳极和阴极分支以及增强的电荷转移机制。
{"title":"Electrochemical deposition of graphene-doped polyaniline films for enhanced zinc corrosion resistance","authors":"A. Messabhia ,&nbsp;H. Boudellioua ,&nbsp;Y. Hamlaoui ,&nbsp;F. Pedraza","doi":"10.1016/j.apsusc.2025.163311","DOIUrl":"10.1016/j.apsusc.2025.163311","url":null,"abstract":"<div><div>Pure polyaniline (PANI), graphene-doped PANI (PANI-GR), and graphene nanoplatelet-doped PANI (PANI-GRNPs) coatings were electrodeposited galvanostatically from an aqueous solution of sodium salicylate and aniline onto zinc substrates. Graphene was obtained via the electrochemical exfoliation of graphite in an acidic medium. Prior to incorporation into the composites, both forms of graphene were dispersed in the surfactant SDS. The electrochemical behaviour of the bare and coated substrates was evaluated in 1 M NaCl. The study demonstrates that electrodeposition via galvanostatic mode is an effective method for coating zinc substrates with polyaniline (PANI) and PANI-graphene composites. Structural analyses using X-ray diffraction (XRD) and Raman spectroscopy confirmed the successful integration of graphene into the PANI matrix. The incorporation of graphene significantly improved the coating quality, enhancing surface homogeneity and minimizing the formation of surface cracks. Mechanical testing revealed that PANI-GR composite coatings exhibited superior microhardness compared to pure PANI and PANI-GRNPs coatings. The PANI-GR coatings outperformed the corrosion resistance of both bare zinc and pure PANI coatings. This enhanced corrosion resistance is attributed to the improved barrier properties, more noble corrosion potential, decreased anodic and cathodic branches and enhanced charge transfer mechanisms facilitated by graphene incorporation.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"701 ","pages":"Article 163311"},"PeriodicalIF":6.3,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143846916","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
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Applied Surface Science
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