Diamond and Related Materials最新文献_第7页

Design and fabrication of freestanding ultra-nanocrystalline diamond nanostructures applying to nano-electromechanical actuators 应用于纳米机电致动器的独立超纳米晶金刚石纳米结构的设计与制造

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2025-07-08 DOI: 10.1016/j.diamond.2025.112617

Taro Ikeda, Yoshiaki Kanamori

{"title":"Design and fabrication of freestanding ultra-nanocrystalline diamond nanostructures applying to nano-electromechanical actuators","authors":"Taro Ikeda, Yoshiaki Kanamori","doi":"10.1016/j.diamond.2025.112617","DOIUrl":"10.1016/j.diamond.2025.112617","url":null,"abstract":"<div><div>Diamond is expected to a candidate of next-generation semiconductor and a platform for quantum devices, owing to the extraordinary material properties and existence of color centers. An integration between diamond and micro- or nano-electromechanical systems (MEMS/NEMS) can realize more functional applications with diamond, which have shown in MEMS/NEMS-based silicon photonic devices. We designed and fabricated freestanding ultra-nanocrystalline diamond nanostructures applying to nano-electromechanical actuators on a diamond-on-insulator wafer. Diamond nanostructures were accurately patterned with employing the fast-atom-beam etching, and released by sacrificial layer etching of a buried oxide layer with using hydrofluoric acid vapor. We experimentally obtained maximum displacement of <span><math><mn>1.28</mn></math></span> μm with driving voltage of <span><math><mn>200</mn></math></span> V for the fabricated diamond nanostructure, which shows possibilities of tunable diamond photonic devices. We discuss about further improvement for diamond nano-electromechanical actuators to increasing displacement with acceptable driving voltage and prevent breaking down.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"158 ","pages":"Article 112617"},"PeriodicalIF":4.3,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Fabrication of novel Pd-WO3-PPD/GO/ACGS electrode for dual-function in high-performance supercapacitors and efficient water splitting 新型高性能超级电容器双功能电极Pd-WO3-PPD/GO/ACGS的制备及高效水分解

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2025-07-08 DOI: 10.1016/j.diamond.2025.112620

Peyman Taghizadeh, Reza Dadashi, Morteza Bahram, Khalil Farhadi

{"title":"Fabrication of novel Pd-WO3-PPD/GO/ACGS electrode for dual-function in high-performance supercapacitors and efficient water splitting","authors":"Peyman Taghizadeh, Reza Dadashi, Morteza Bahram, Khalil Farhadi","doi":"10.1016/j.diamond.2025.112620","DOIUrl":"10.1016/j.diamond.2025.112620","url":null,"abstract":"<div><div>The development of clean and renewable energy sources as well as supercapacitors to replace fossil fuels is an important challenge to deal with environmental problems. In this study, for the first time, simultaneous electrochemical deposition of poly p-Phenylene diamine (PPD) polymer and tungsten metal oxide (WO<sub>3</sub>) followed by electrodoping of palladium (Pd) nanoparticles was carried out on graphene oxide sheets formed on anodized commercial graphite sheet (GO/ACGS). The performance of Pd-WO<sub>3</sub>-PPD/GO/ACGS photoelectrode for both hydrogen production and energy storage is investigated. Also, the surface morphology and chemical structure of Pd-WO<sub>3</sub>-PPD/GO/ACGS photoelectrode are investigated by FE-SEM, EDX-EDX mapping, ATR-IR, Raman, and XRD tests. Electrochemical behavior investigation of the Pd-WO<sub>3</sub>-PPD/GO/ACGS electrode showed excellent capacitance of 635.16 mF cm<sup>−2</sup> at 1 mA cm<sup>−2</sup> and a good hydrogen production ability of 31 mmol cm<sup>−2</sup> after 2 h in 1 M H<sub>2</sub>SO<sub>4</sub> electrolyte solution. The results of the fabricated solid-state supercapacitor device show that the fabricated device had a good capacitance of 177 mF cm<sup>−2</sup>), maximum power density of 3500 mW cm<sup>−2</sup>, an energy density of 25.02 mWh cm<sup>−2</sup> at 0.5 mA cm<sup>−2</sup> and excellent cyclic stability and coulombic efficiency of 91 % and 99.4 % after 7000 GCD cycles, respectively. The results of the dual application of the fabricated electrode for energy production and storage showed that this electrode has good potential for use in both fields.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"158 ","pages":"Article 112620"},"PeriodicalIF":4.3,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Large-scale production of CNT reinforced PVC-based artificial leather 大规模生产CNT增强pvc基人造革

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2025-07-08 DOI: 10.1016/j.diamond.2025.112619

Abdulcabbar Yavuz , Musa Yilmaz , Necip Fazil Yilmaz

{"title":"Large-scale production of CNT reinforced PVC-based artificial leather","authors":"Abdulcabbar Yavuz , Musa Yilmaz , Necip Fazil Yilmaz","doi":"10.1016/j.diamond.2025.112619","DOIUrl":"10.1016/j.diamond.2025.112619","url":null,"abstract":"<div><div>Nanoparticle-reinforced polymers have been extensively studied at the laboratory scale for decades; however, their large-scale implementation in everyday applications remains limited. In this study, carbon nanotube (CNT)-enhanced PVC-based artificial leather was successfully fabricated and systematically characterized. The structural, optical, and mechanical properties of both neat and CNT-reinforced artificial leather were investigated through FTIR, UV–Vis spectroscopy, SEM, XRD, tensile, flexibility, abrasion, wear, and water contact angle measurements. Accelerated aging tests under UV and thermal exposure were also conducted. Although the addition of 0.5 wt% CNTs did not alter the surface structure—likely due to nanoparticle encapsulation within the polymer matrix—it significantly influenced other properties. The CNTs were generally well-dispersed with minimal agglomeration. Notably, the inclusion of CNTs enhanced tensile strength, reduced abrasion loss, and enabled control over the flexibility of the artificial leather. These findings demonstrate that even a small addition of CNTs can substantially improve the mechanical performance and durability of PVC-based artificial leather, highlighting its potential for broader practical applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"158 ","pages":"Article 112619"},"PeriodicalIF":4.3,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Highly enhanced adsorption and photodegradation of various dyes in wastewater: Novel multifunctional composites of CuAl-layered double oxide, activated carbon and magnetite 废水中各种染料的高增强吸附和光降解：新型复合材料的四层双氧化物，活性炭和磁铁矿

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2025-07-08 DOI: 10.1016/j.diamond.2025.112618

Krongnet Sangthong , Panita Sumanatrakul , Nithima Khaorapapong , Sonchai Intachai

{"title":"Highly enhanced adsorption and photodegradation of various dyes in wastewater: Novel multifunctional composites of CuAl-layered double oxide, activated carbon and magnetite","authors":"Krongnet Sangthong , Panita Sumanatrakul , Nithima Khaorapapong , Sonchai Intachai","doi":"10.1016/j.diamond.2025.112618","DOIUrl":"10.1016/j.diamond.2025.112618","url":null,"abstract":"<div><div>This study focused on fabricating new magnetic materials as both adsorbent and photocatalyst comprising of Fe<sub>3</sub>O<sub>4</sub> and CuAl-LDH or CuAl-LDO, and different AC (derived from the shells of durian, peanut, and rubber fruit). Various characteristics of composites confirmed by zeta potential, VSM and BET, revealed two different charged-active sites (−18 and +14 mV), magnetic behavior (18–19 emu/g), and large surface area (319–331 m<sup>2</sup>/g), as well as semiconducting photocatalysts (CuO, CuAl<sub>2</sub>O<sub>4</sub> and Fe<sub>3</sub>O<sub>4</sub>). The magnetic composites exhibited the remarkable effectiveness for removing anionic eriochrome black T and cationic malachite green in water, and pink reed-dye in wastewater under easy magnetic separation. The adsorption kinetic and isotherm were best-fitted by the <em>pseudo</em>-second order (R<sup>2</sup> > 0.994) and Langmuir (R<sup>2</sup> ≥ 0.999) models. The photocatalytic activity of all products was dependent on their adsorption efficiency, and the effects of CuO, CuAl<sub>2</sub>O<sub>4</sub> and Fe<sub>3</sub>O<sub>4</sub> photocatalysts for eliminating three dyes in water. The photocatalytic reusability could run multiple cycles with preserving high performance of structural and magnetic properties. This work illustrated the as-prepared magnetic composites as a potential and practical and adsorbent and photocatalyst for treating both anionic and cationic dyes in wastewater.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"158 ","pages":"Article 112618"},"PeriodicalIF":4.3,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144587819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Finite element analysis on mechanical performance and failure of carbon nanotube fibers under transverse compression 碳纳米管纤维横向压缩力学性能及破坏的有限元分析

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2025-07-08 DOI: 10.1016/j.diamond.2025.112600

Chenyang Duan , Yan Zhang , Ping Wang , Haili Zhou , Yuanyuan Li

{"title":"Finite element analysis on mechanical performance and failure of carbon nanotube fibers under transverse compression","authors":"Chenyang Duan , Yan Zhang , Ping Wang , Haili Zhou , Yuanyuan Li","doi":"10.1016/j.diamond.2025.112600","DOIUrl":"10.1016/j.diamond.2025.112600","url":null,"abstract":"<div><div>The transverse compression performance of fibers is crucial for applications in load-bearing composite materials and holds key significance for future aerospace, industrial transportation, and other fields. This work first aimed to investigate the transverse compression behavior and failure mechanism of carbon nanotube (CNT) fibers using finite element analysis based on macro experimental investigations. The load–displacement response, stress distribution, critical failure mechanisms, and energy absorption of CNT fibers under transverse compression are comprehensively analysed. The compressive fracture stresses of aerogel-spun and dry-spun CNT fibers are approximately 796 MPa and 1036 MPa, respectively. The critical failure mechanism was shear failure at compressive and uncompressive junction section. Particularly, the local stress propagation and progressive failure were observed through simulations. In addition, combined with the failure morphology of the aerogel-spun and dry-spun CNT fibers under tensile loading before and after compression, the residue tensile failure mechanisms of the aerogel-spun and dry-spun CNT fibers were mainly due to ductile fracture and brittle fracture, respectively. The maximum tensile strengths of aerogel-spun and dry-spun CNT fibers after compression are 341 MPa and 673 MPa, respectively.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"158 ","pages":"Article 112600"},"PeriodicalIF":4.3,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144656793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Detection of solid particles in H2/CH4/Ar plasma for chemical vapor deposition of diamond by laser light scattering and their effect on crystal growth 激光散射检测化学气相沉积金刚石H2/CH4/Ar等离子体中固体颗粒及其对晶体生长的影响

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2025-07-08 DOI: 10.1016/j.diamond.2025.112627

Kaishu Nitta, Takehiro Shimaoka, Hideaki Yamada, Akiyoshi Chayahara, Nobuteru Tsubouchi, Yoshiaki Mokuno

{"title":"Detection of solid particles in H2/CH4/Ar plasma for chemical vapor deposition of diamond by laser light scattering and their effect on crystal growth","authors":"Kaishu Nitta, Takehiro Shimaoka, Hideaki Yamada, Akiyoshi Chayahara, Nobuteru Tsubouchi, Yoshiaki Mokuno","doi":"10.1016/j.diamond.2025.112627","DOIUrl":"10.1016/j.diamond.2025.112627","url":null,"abstract":"<div><div>Diamond's exceptional properties make it ideal for various applications. Chemical vapor deposition (CVD) is an essential technique for fabricating diamond films used in device applications. The formation of solid particles in the gas phase during CVD is a significant focus of this purpose, as avoiding particle inclusion, which can lead to degradation, presents an opportunity to achieve remarkable improvements in crystal quality and device performance. This study is the first to demonstrate <em>in-situ</em> quantitative detection of solid particles in a diamond CVD environment using laser light scattering as well as evaluation of the correlation between solid particles and the crystal quality of CVD-grown films. In an H<sub>2</sub>/CH<sub>4</sub>/Ar plasma with substantial Ar fractions (28–47 %), solid particles were detected in the gas phase at pressures around 120 Torr. Diamond films grown epitaxially under conditions with a high number of detected solid particles exhibited embedded unepitaxial crystals and degraded crystal quality. These findings offer new insights into optimizing CVD processes for high-quality diamond films and contribute to improved reliability for future diamond device applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"158 ","pages":"Article 112627"},"PeriodicalIF":4.3,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Performance optimization design of diamond coating on WC-Co hard alloy substrate WC-Co硬质合金基体上金刚石涂层性能优化设计

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2025-07-08 DOI: 10.1016/j.diamond.2025.112626

Zhengxiong Ou , Yue Xia , Hui Song , Kaiyue Wang , He Li

{"title":"Performance optimization design of diamond coating on WC-Co hard alloy substrate","authors":"Zhengxiong Ou , Yue Xia , Hui Song , Kaiyue Wang , He Li","doi":"10.1016/j.diamond.2025.112626","DOIUrl":"10.1016/j.diamond.2025.112626","url":null,"abstract":"<div><div>Diamond-coated hard alloy substrates have emerged as a prominent research focus in mechanical seal applications, owing to their exceptional combination of substrate toughness and coating properties (notably low friction coefficient and superior wear resistance). During Chemical vapor deposition (CVD) diamond deposition process, the cobalt binder phase in cemented carbide exhibits significant thermal migration, diffusing to the surface where it interacts with activated carbon species and promotes carbon dissolution. This detrimental process simultaneously impedes diamond nucleation kinetics and severely compromises coating-substrate interfacial integrity. The adhesion strength of diamond coatings on WC-Co substrates is significantly enhanced through a two-step pre-treatment strategy implemented prior to coating deposition. First, acid etching effectively removes surface and subsurface cobalt (Co) from the WC-Co substrate, mitigating Co-induced interference with diamond nucleation and growth. Second, magnetron sputtering is used to deposit a dense, continuous 1.2 μm-thick Si interlayer, which alleviates residual stress caused by thermal expansion coefficient mismatch between the substrate and diamond coating. Through investigations on the adhesion of diamond coating to the substrate and the growth mechanism among diamond, interlayer, and substrate, it is revealed that magnetron sputtering deposition of Si at 300 °C forms C<img>Si bonds, which improves interlayer density, increases the critical load by about 30 %, and enables the microcrystalline diamond (MCD) coating to achieve an adhesion of 62.55 N. Heat treatment effectively reduces interfacial residual stress and promotes the formation of C<img>W and C<img>Si bonds between the substrate and interlayer, thereby enhancing film-substrate adhesion. Additionally, nanoscale diamond coatings contain graphite phases, exhibiting a bonding strength approximately 20 N lower than that of micron-scale coatings.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"158 ","pages":"Article 112626"},"PeriodicalIF":4.3,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144656788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Enhanced the mechanical and thermodynamic properties of Mo2AlC MAX layered carbide for high temperature applications 提高了Mo2AlC MAX层状碳化物的力学和热力学性能，适用于高温应用

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2025-07-07 DOI: 10.1016/j.diamond.2025.112622

Lirong Xu, Yong Pan, Jiaxin Zhu

{"title":"Enhanced the mechanical and thermodynamic properties of Mo2AlC MAX layered carbide for high temperature applications","authors":"Lirong Xu, Yong Pan, Jiaxin Zhu","doi":"10.1016/j.diamond.2025.112622","DOIUrl":"10.1016/j.diamond.2025.112622","url":null,"abstract":"<div><div>Mo<sub>2</sub>AlC MAX carbide exhibits multiple properties of refractory metal, ceramics and oxidation resistance, making it a promising high temperature material. However, further enhancing its overall properties will be an important challenge in high temperature industries. To improve its overall properties, the influence of refractory metals on the structural stability, mechanical and thermodynamic properties of Mo<sub>2</sub>AlC carbide is systematically studied by using first-principles calculations. The calculated result shows that Mo<sub>2</sub>AlC and TM-doped Mo<sub>2</sub>AlC carbides are thermodynamic and dynamical stabilities. Importantly, it is found that <em>Re</em>-doped, Ta-doped and W-doped enhance the shear deformation resistance and elastic stiffness of Mo<sub>2</sub>AlC carbide. Naturally, the high mechanical properties of TM-doped Mo<sub>2</sub>AlC are that the doped refractory metal enhances the electronic interaction between Mo and C atoms at the Mo<img>C layered structure, and between Mo and Al atoms at Mo-Al-Mo layered structure, which is demonstrated by the change of Mo<img>C bond and Mo<img>Al bond. In addition, W-doped slightly improves the thermodynamic properties of Mo<sub>2</sub>AlC carbide. Therefore, it is believed that W metal, as a useful element, can improve the mechanical and thermodynamic properties of Mo<sub>2</sub>AlC carbide, which provides an important guarantee for the wide applications of Mo<sub>2</sub>AlC carbides in future high temperature industrial fields.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"158 ","pages":"Article 112622"},"PeriodicalIF":4.3,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144571797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Single-step hydrothermal synthesis of Plantago major-based carbon dots: therapeutic and antimicrobial properties 单步水热合成车前草基碳点：治疗和抗菌性能

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2025-07-07 DOI: 10.1016/j.diamond.2025.112624

Emine Altinkaya

{"title":"Single-step hydrothermal synthesis of Plantago major-based carbon dots: therapeutic and antimicrobial properties","authors":"Emine Altinkaya","doi":"10.1016/j.diamond.2025.112624","DOIUrl":"10.1016/j.diamond.2025.112624","url":null,"abstract":"<div><div>In this study, <em>Plantago major</em> carbon dots were synthesized in a single step by hydrothermal synthesis method. Carbon dot synthesis using <em>Plantago major</em> precursor was performed for the first time and the synthesized carbon dots were not subjected to any modification. UV–Visible (UV–Vis) Spectroscopy, High-resolution Transmission Electron Microscopy (HR-TEM), Fourier Transform Infrared Spectroscopy (FTIR), fluorescence spectroscopy, and X-ray diffraction (XRD) analyses were performed to characterize carbon dots. The antioxidant, antibacterial, anticancer, and wound-healing activities of carbon dots subjected to different purification processes (filtration, dialysis) were compared. Antioxidant activity of the carbon dots was evaluated by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method, antibacterial activity against <em>Escherichia coli</em> (<em>E coli</em>) and <em>Staphylococcus aureus</em> (<em>S. aureus</em>) by disk diffusion method, and wound healing effect via in vitro scratch assay test. The anticancer activity of carbon dots against MCF-7 cells was evaluated. The filtered carbon dots exhibited antibacterial activity against <em>S. aureus.</em> In contrast, dialyzed carbon dots did not exhibit antibacterial activity against both <em>S. aureus</em> and <em>E. coli.</em> Filtered carbon dots exhibited excellent anticancer properties, while dialyzed carbon dots also exhibited an accelerating effect on wound healing. Purification methods of carbon dots affect the effectiveness of carbon dots. Carbon dots obtained from <em>Plantago major</em> are promising in the pharmaceutical sector with their wound-healing effect and anticancer properties in biomedical applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"158 ","pages":"Article 112624"},"PeriodicalIF":4.3,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144587818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Impact of acid etching on surfaces and near-surface region in nitrogen plasma terminated polycrystalline diamond 酸蚀对氮等离子体端部聚晶金刚石表面和近表面区域的影响

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2025-07-07 DOI: 10.1016/j.diamond.2025.112623

Mohan Kumar Kuntumalla , Arsène Chemin , Nitzan Matos Doron , Maria Brzhezinskaya , Tristan Petit , Alon Hoffman

{"title":"Impact of acid etching on surfaces and near-surface region in nitrogen plasma terminated polycrystalline diamond","authors":"Mohan Kumar Kuntumalla , Arsène Chemin , Nitzan Matos Doron , Maria Brzhezinskaya , Tristan Petit , Alon Hoffman","doi":"10.1016/j.diamond.2025.112623","DOIUrl":"10.1016/j.diamond.2025.112623","url":null,"abstract":"<div><div>In this study, the influence of tri-acid: HClO<sub>4</sub>:H<sub>2</sub>SO<sub>4</sub>:HNO<sub>3</sub> (1:3:4) etching on the surface and near-surface chemical properties of radio frequency (RF) nitrogen plasma terminated polycrystalline diamond (PCD) surfaces is reported. From the C(1s) and N(1s) high resolution X-ray photoelectron spectroscopy (HR-XPS) measured as a function of photon energy, it is clearly shown that acid etching reduced the thickness of the disordered C(sp<sup>2</sup>) layer created by the nitrogen plasma treatment exposing an upper surface of a larger C(sp<sup>3</sup>) character alongside the formation of C-O<sub>x</sub> bonds. This is accompanied by a reduction in the nitrogen surface concentration and the N(1s) XP peak full width at half maximum (FWHM), suggesting a more homogeneous nitrogen bonding to the diamond surface. High resolution electron energy loss spectroscopy (HREELS) shows that NH(ads) species produced by the plasma processes are preferentially etched alongside the formation of C=O(ads), C-O(ads), and COOC(ads) species, whereas hydrogen is bonded in various CH<sub>y</sub>(ads) configurations. The C K-edge NEXAFS spectra show characteristic peaks in the pre-edge structure clearly associated with nitrogen bonding. Following acid etching, the intensities of peaks related to defect states are reduced, whereas the diamond second band-gap at 302.4 eV increases in intensity. N K-edge NEXAFS of the nitrogen plasma terminated surfaces show peaks associated to C-N(ads) and C=N(ads) bonding, which acid etching results in the preferred depopulation of C=N(ads) bonds.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"158 ","pages":"Article 112623"},"PeriodicalIF":4.3,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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