Diamond and Related Materials最新文献_第6页

First principles study of the electronic and mechanical properties of a porous carbon 多孔碳电子和机械特性的第一原理研究

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-12 DOI: 10.1016/j.diamond.2024.111769

Geng-Xin Yin, Shi-Jie Lv, Xin-Xin Wang, Zhen-Long Lv

{"title":"First principles study of the electronic and mechanical properties of a porous carbon","authors":"Geng-Xin Yin, Shi-Jie Lv, Xin-Xin Wang, Zhen-Long Lv","doi":"10.1016/j.diamond.2024.111769","DOIUrl":"10.1016/j.diamond.2024.111769","url":null,"abstract":"<div><div>Carbon is a versatile element in the periodic table, which can form many allotropes with various properties in nature. In this work, the electronic and mechanical properties of a low energy porous carbon, a topological nodal line material, are studied by first principles method. Elastic and dynamical stabilities under hydrostatic pressure are investigated, which reveal that the dynamical instability occurs first. It is a material with negative linear compressibility along the <em>a</em> axis. Tension and compression strains are applied in different crystal orientations to obtain the corresponding stresses. The results indicate that the <em>c</em> axis can endure the smallest strains, the <em>a</em> axis can withstand moderate ones while the <em>b</em> axis can bear the largest ones, however, the resulted stresses have very different behaviors. Shear strains are exerted on different crystal planes to see the corresponding mechanical responses, which uncover that the (100)[010] shear pattern has the lowest critical stress than other shear patterns. The crystal structure, dynamical stability, and electron density difference under the critical strains are checked. The reasons for the different mechanical behaviors under pressure and strain are proposed. The effects of pressure and strain on its topological property are also studied.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111769"},"PeriodicalIF":4.3,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657851","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

Bending response performance in nitrogen-doped reduced graphene oxide-PEDOT:PSS: The impact of nitrogen flow rate on the nitrogen doping configurations 氮掺杂还原氧化石墨烯-PEDOT:PSS 的弯曲响应性能：氮气流速对氮掺杂配置的影响

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-12 DOI: 10.1016/j.diamond.2024.111771

Shafarina Azlinda Ahmad Kamal , Richard Ritikos , Boon Tong Goh , Syed Muhammad Hafiz , Hideki Nakajima , Sarayut Tunmee

{"title":"Bending response performance in nitrogen-doped reduced graphene oxide-PEDOT:PSS: The impact of nitrogen flow rate on the nitrogen doping configurations","authors":"Shafarina Azlinda Ahmad Kamal , Richard Ritikos , Boon Tong Goh , Syed Muhammad Hafiz , Hideki Nakajima , Sarayut Tunmee","doi":"10.1016/j.diamond.2024.111771","DOIUrl":"10.1016/j.diamond.2024.111771","url":null,"abstract":"<div><div>Mechanical bending sensors play a pivotal role in various applications, from wearable devices to healthcare monitoring systems. The integration of nitrogen-doped reduced graphene oxide (NrGO) materials has emerged as a versatile approach, offering a promising avenue for enhancing the performances of these sensors. Various nitrogen doping configurations within the materials matrix have been found to profoundly influence the sensor's bending response. In this work, we identified that pyrrolic-N doping configurations were more dominant at lower nitrogen flow rates of 10 and 20 sccm, with the percentages of 52.9 and 48.7 %, respectively. These configurations exhibited a stable pattern of resistance changes in response to bending, particularly when subjected to bending angles of 55° and 65°. Despite some inconsistencies in bending response at lower bending angles, the sensors demonstrated heightened sensitivity, registering at 0.34 kPa. In contrast, sensors predominantly characterized by pyridinic-N configurations at 40 sccm maintained a consistent level of sensitivity across different bending angles, demonstrating remarkable stability and structural robustness, even after enduring 10,000 cycles. These findings indicated that pyridinic-N configurations play a critical role in enhancing sensor performance, ensuring reliable measurements across various mechanical deformations.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111771"},"PeriodicalIF":4.3,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702821","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

Heterostructure of perovskite coupled graphitic carbon nitride for enhanced photodegradation under visible light 在可见光下增强光降解的过氧化物耦合氮化石墨异质结构

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-12 DOI: 10.1016/j.diamond.2024.111770

Alveera Sohel , Sakshi Beniwal , Praveen K. Surolia , Sarika Singh

{"title":"Heterostructure of perovskite coupled graphitic carbon nitride for enhanced photodegradation under visible light","authors":"Alveera Sohel , Sakshi Beniwal , Praveen K. Surolia , Sarika Singh","doi":"10.1016/j.diamond.2024.111770","DOIUrl":"10.1016/j.diamond.2024.111770","url":null,"abstract":"<div><div>This study aimed to prepare and characterize LaFeO<sub>3</sub> nanoparticles loaded graphitic carbon nitride (LFO/g-C<sub>3</sub>N<sub>4</sub>) photocatalyst and investigate the degradation of organic pollutants under UV and natural sunlight exposure. It is observed that LFO nanoparticles of an average size of about 67 nm were distributed on g-C<sub>3</sub>N<sub>4</sub> sheets through chemical bonding owing to the formation of a composite. Compared to LFO and g-C<sub>3</sub>N<sub>4,</sub> composite has a good absorption ability to harvest more UV and visible light due to its large surface area and pore size. The photocatalytic studies revealed that the g-C<sub>3</sub>N<sub>4</sub>/LFO composite exhibits higher catalytic efficiency and stability for methylene blue (MB) degradation under UV and visible light. Under UV light irradiation, the degradation efficiency of LFO, g-C<sub>3</sub>N<sub>4,</sub> and g-C<sub>3</sub>N<sub>4</sub>/LFO composite in synthetic wastewater was found to be around 50, 80 and 93 % with corresponding rate constants 0.05, 0.02, and 0.1 min<sup>−1</sup> in 30 min, respectively. Under natural sunlight, the composite degraded 97 % of MB in 180 min with a rate constant of 0.016 min<sup><img>1</sup>. The higher photocatalytic activity of the composite was attributed to the interfacial charge transfer between LaFeO<sub>3</sub> and g-C<sub>3</sub>N<sub>4,</sub> which are responsible for effective charge separation in the composite. Further, it has been investigated that singlet oxygen species (<sup>1</sup>O<sub>2</sub>) and hydroxyl radicals (<sup>•</sup>OH) are the main reactive species that contributed considerably to the complete degradation of MB. The nanocomposite was also demonstrated to be a stable catalyst and can be reused without any further modification.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111770"},"PeriodicalIF":4.3,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657859","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

Honeycomb-like N, S dual-doped porous carbons derived from pomelo peel by effective exogenous doping strategy for supercapacitor electrodes 通过有效的外源掺杂策略从柚子皮中提取蜂窝状 N、S 双掺杂多孔碳，用于超级电容器电极

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-12 DOI: 10.1016/j.diamond.2024.111768

Hao Xu , Shan Zhong , Chuan Yuan , Xiaojun Zheng , Shuang Wang

{"title":"Honeycomb-like N, S dual-doped porous carbons derived from pomelo peel by effective exogenous doping strategy for supercapacitor electrodes","authors":"Hao Xu , Shan Zhong , Chuan Yuan , Xiaojun Zheng , Shuang Wang","doi":"10.1016/j.diamond.2024.111768","DOIUrl":"10.1016/j.diamond.2024.111768","url":null,"abstract":"<div><div>Biomass has emerged as a pivotal precursor to synthesize supercapacitor electrode materials owing to its low-cost and plentiful resources. The optimization of heteroatoms and porous structures is believed to be a viable method to enhance the electrochemical properties of biomass-generated carbons. Herein, pomelo peel as a precursor using KOH as an activator and heteroatom dopants (urea and sodium sulfide) was successfully converted into N, S dual-doped porous carbons under the high temperature. The effective exogenous doping strategy realizes a high abundance of N/S heteroatoms, and KOH chemical activation promotes the development of nanopores and interconnected porosities. The resultant carbon CNS-800 with a high specific surface area of 1823.8 m<sup>2</sup> g<sup>−1</sup> and rich heteroatoms of N (2.51 wt%) and S (1.36 wt%) anticipately exhibits the outstanding electrochemical properties, including the excellent specific capacitance of 329.2 F g<sup>−1</sup> at 1 A g<sup>−1</sup> in a three-electrode (3E) system and the superb capacitance retention rate of 74.12 %. The fabricated CNS-800-based symmetric two-electrode (2E) supercapacitor demonstrates a good capacitance of 243.7 F g<sup>−1</sup> and excellent cycling stability, as well as a superb energy density of 14.3 Wh kg<sup>−1</sup>. This work provides a compelling and cost-effective approach to transform biomass waste like pomelo peels into high-performance electrodes for supercapacitors.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"150 ","pages":"Article 111768"},"PeriodicalIF":4.3,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663105","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

Fermi level regulation of single-walled carbon nanotubes by metal chloride doping for enhanced NO2 sensing performance 通过掺杂金属氯化物调节单壁碳纳米管的费米级以增强二氧化氮传感性能

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-12 DOI: 10.1016/j.diamond.2024.111777

Ruxuan Zhang , Mingkui Zhu , Tian Tian , Huan Yin , Tianhao Zhang , Jing Liu , Keyong Dong , Xun Li , Bo Zhao , Yanjie Su

{"title":"Fermi level regulation of single-walled carbon nanotubes by metal chloride doping for enhanced NO2 sensing performance","authors":"Ruxuan Zhang , Mingkui Zhu , Tian Tian , Huan Yin , Tianhao Zhang , Jing Liu , Keyong Dong , Xun Li , Bo Zhao , Yanjie Su","doi":"10.1016/j.diamond.2024.111777","DOIUrl":"10.1016/j.diamond.2024.111777","url":null,"abstract":"<div><div>Pristine single-walled carbon nanotubes (SWCNTs) typically exhibit limited sensitivity due to the low charge transfer dynamics between nanotubes and gas molecules. Among various enhancement methods, the Fermi level regulation proves to be effective in promoting the charge transfer between SWCNTs and gas molecules, consequently improving the sensing performance. Herein, we firstly report a non-destructive method to regulate the Fermi level of SWCNTs through doping metal chlorides, and the interfacial charge transfer between SWCNTs and different metal chlorides has been well investigated by combining Raman shift with X-ray photoelectron spectroscopy. Experimental results reveal that the interfacial charge transfer dynamics determine the sensing properties of SWCNTs doped with chlorides. The as-fabricated FeCl<sub>3</sub>-doped SWCNT sensors exhibit a high response of 196.9 % in response to 100 ppb NO<sub>2</sub> gas with excellent selectivity. The Kelvin probe force microscope (KPFM) results directly prove the doping effect of metal chlorides due to the shift down of Fermi level of SWCNTs after doping FeCl<sub>3</sub>. Our work not only propose a novel method to controllably regulate the Fermi level of SWCNTs but also provide a guidance for high-performance SWCNT-based sensing devices.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111777"},"PeriodicalIF":4.3,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702820","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

Effects of argon plasma treatment on carbon fiber surface characteric and its reinforcing polyimide composites interfacial properties at room and elevated temperatures 氩等离子处理对室温和高温下碳纤维表面特性及其增强聚酰亚胺复合材料界面性能的影响

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-10 DOI: 10.1016/j.diamond.2024.111765

Jing Wang, Zhengyin Yu, Shuang Yang, Zuhao Wang, Rong Ren, Xuhai Xiong

{"title":"Effects of argon plasma treatment on carbon fiber surface characteric and its reinforcing polyimide composites interfacial properties at room and elevated temperatures","authors":"Jing Wang, Zhengyin Yu, Shuang Yang, Zuhao Wang, Rong Ren, Xuhai Xiong","doi":"10.1016/j.diamond.2024.111765","DOIUrl":"10.1016/j.diamond.2024.111765","url":null,"abstract":"<div><div>In high temperature conditions, this can cause considerable changes in the mechanical properties of the composite. In order to determine the structural and mechanical property changes that occur in composite materials at elevated temperatures, to elucidate the damage mechanisms at elevated temperatures, and to improve the stability and durability of the materials. This paper studies how plasma treatment time affects the surface polarity, roughness, wettability and mechanical properties of carbon fibers. The results showed that the best wettability was attained after 10 min of plasma treatment, and new oxygen-containing functional groups (COO- and -C=O) developed on the fiber surface. The fundamental explanation is that during plasma surface treatment, the C<img>H group in the bisphenol A part chain segment present in the epoxy resin sizing agent's composition is oxidized, forming an organic oxide layer. In this paper, the plasma modification technology was utilized to improve the interfacial compatibility of carbon fiber and Polyimide (PI) resin, and the interlaminar shear strength reached 103.98 MPa, up 10.49 %, and the strength retention rate was 84.3 % at 300 °C. In this paper, the plasma modification technique was employed to increase the interfacial compatibility of carbon fiber and PI resin. It was found that the Inductively Coupled Plasma (ICP) treated carbon fiber surfaces underwent physical and chemical changes that effectively enhanced the interfacial compatibility with the resin. However, the chemical groups and physically etched regions on the surface of the plasma-modified fibers are able to impede the relative motion of the resin to a certain extent, thus improving the interfacial strength.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111765"},"PeriodicalIF":4.3,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658251","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

Study on ultrasonic-assisted lapping performance and material removal behavior of diamond/SiC composites 金刚石/碳化硅复合材料的超声波辅助研磨性能和材料去除行为研究

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-10 DOI: 10.1016/j.diamond.2024.111767

Bo Xing , Guoqin Huang , Liqu Wu , Yangli Xu , Meiqin Zhang , Wenhan Zeng , Wenbin Zhong , Xipeng Xu

{"title":"Study on ultrasonic-assisted lapping performance and material removal behavior of diamond/SiC composites","authors":"Bo Xing , Guoqin Huang , Liqu Wu , Yangli Xu , Meiqin Zhang , Wenhan Zeng , Wenbin Zhong , Xipeng Xu","doi":"10.1016/j.diamond.2024.111767","DOIUrl":"10.1016/j.diamond.2024.111767","url":null,"abstract":"<div><div>Diamond/SiC composites have emerged as a new generation of highly promising materials for semiconductor packaging due to their excellent thermal conductivity. However, the exceptionally hard diamond and SiC phases in the composites have made precision machining a substantial difficulty. This study specifically explores the utilization of ultrasonic-assisted lapping (UAL) to enhance the machining performance of diamond/SiC composites. The focus is on investigating the effects of UAL on the material removals, including the brittle-ductile transition of sample interfacial diamond at different ultrasonic conditions, as well as the surface morphology of diamond/SiC composites. The removal mechanism of diamond/SiC composites under different machining conditions and the transient impact action of the abrasive were systematically analyzed, taking into account the abrasive size, the mechanical effects of ultrasonic vibration, and the interplay of processing parameters. The experimental results reveal that UAL significantly changes the traditional removal mode of diamond/SiC composites. At a constant rotational speed, the diamond abrasive size in the lapping solution exerts the primary influence on the sample surface morphology, followed by the average power of ultrasonic. Compared to conventional lapping methods, UAL improves the removal rate by 10.3 %, 5.4 %, and 5.3 % for abrasive sizes of 8 μm, 4 μm, and 1 μm, respectively. Optimally, the best surface quality finish of diamond/SiC composites was achieved with a lapping solution containing 4 μm abrasive particles and an average ultrasonic vibrator power of 75 W. This study underscores the potential of UAL to enhance the efficiency and quality of diamond/SiC composite machining.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111767"},"PeriodicalIF":4.3,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702816","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 compressive strength by Ti-Cr coating on cBN particle surface using vacuum vapor deposition 利用真空气相沉积技术在 cBN 颗粒表面镀 Ti-Cr 膜以增强抗压强度

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-09 DOI: 10.1016/j.diamond.2024.111762

Yufei Jiang , Lili Fang , Weifei Yang

{"title":"Enhanced compressive strength by Ti-Cr coating on cBN particle surface using vacuum vapor deposition","authors":"Yufei Jiang , Lili Fang , Weifei Yang","doi":"10.1016/j.diamond.2024.111762","DOIUrl":"10.1016/j.diamond.2024.111762","url":null,"abstract":"<div><div>In order to enhance compressive strength of the coating on cBN particles, this study proposes using vacuum vapor deposition to achieve a Titanium-Chromium (Ti-Cr) co-deposited coating on the surface of cBN particles. Base on deposition process of the Ti-Cr coating using vacuum vapor deposition technology, it proposed a simulation model by an Angular Coefficient Method (ACM), and conducts compressive strength experiments on the Ti-Cr coating of cBN particles. Using the simulation and analysis model, the effect of temperature on the formation of Ti-Cr coating during the reaction process was systematically analyzed, the molecular flow, the change of film thickness, and the deposition rate at different temperature stages was got, and verify the simulation results through experiments. The formation mechanism of Ti-Cr co-deposited coatings was derived by SEM, XRD characterization and reaction thermodynamic analysis. Experiments show that Ti-Cr co-deposited coatings are effective in increasing compressive strength, and the experimental results can be a guidance in controlling Ti/Cr amount in the coatings. In addition, it was found in experiments that by using vacuum vapor deposition technique, Ti/Cr powder mixing ratio of 1:1 provided the best compressive strength, and the compressive strength increased with higher Cr content in the coating after heating. This achievement is of significant importance for the formation of alloyed coatings on superhard materials, enhancing the wettability between the surfaces of superhard materials and their substrates under high-temperature conditions.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"151 ","pages":"Article 111762"},"PeriodicalIF":4.3,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721852","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

Improve wear resistance of C/C composites as artificial bone using diamond-like carbon coatings 利用类金刚石碳涂层提高 C/C 复合材料作为人工骨的耐磨性

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-09 DOI: 10.1016/j.diamond.2024.111761

Xiang Zhang, Ling Wang, Jiahao Liang, Zhixia Cai, Chengfeng Wu, Zhoujian Tan, Jiqiao Liao

{"title":"Improve wear resistance of C/C composites as artificial bone using diamond-like carbon coatings","authors":"Xiang Zhang, Ling Wang, Jiahao Liang, Zhixia Cai, Chengfeng Wu, Zhoujian Tan, Jiqiao Liao","doi":"10.1016/j.diamond.2024.111761","DOIUrl":"10.1016/j.diamond.2024.111761","url":null,"abstract":"<div><div>In this study, diamond-like carbon (DLC) coatings and silicon-doped diamond-like (Si-DLC) coatings were prepared on the surface of C/C composites by a combination of plasma-enhanced chemical vapor deposition (PECVD) and magnetron sputtering processes. The film composition, microstructure and atomic bond structure were characterized using X-ray photoelectron spectroscopy, field-emission scanning electron microscopy and Raman spectroscopy. The mechanical properties and friction behavior related to the Si element were investigated using nanoindentation and HT-1000 high temperature friction and wear tester. The biocompatibility of the materials was also evaluated by the MG-63 proliferation test. The results indicate that Si elements were successfully incorporated into the DLC films, bonding with C and O atoms, which altered the thermal stability and microstructure of the coatings, reduced the internal stress of the films, and increased disorder. Compared to C/C composites, all coated layers exhibited lower coefficients of friction, with the formation of transfer layers and graphitization induced by friction contributing to the excellent tribological performance. Both coatings showed no cytotoxicity and demonstrated good biocompatibility. Both coatings are effective in reducing wear and chip losses in C/C composites when used as artificial bones. This work suggests that diamond-like carbon coated C/C composites can be excellent structural materials for human body in biomedical science.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"150 ","pages":"Article 111761"},"PeriodicalIF":4.3,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662993","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

Two types of stimulated emission in HPHT diamond with a high concentration of NV centers 具有高浓度 NV 中心的 HPHT 金刚石中的两种受激发射类型

IF 4.3 3区材料科学

Diamond and Related Materials Pub Date : 2024-11-09 DOI: 10.1016/j.diamond.2024.111763

V.F. Lebedev , E.A. Vasilev , I.V. Klepikov , T.S. Misnikova , Ya.A. Ryvkina , A.V. Koliadin , V.G. Vins

{"title":"Two types of stimulated emission in HPHT diamond with a high concentration of NV centers","authors":"V.F. Lebedev , E.A. Vasilev , I.V. Klepikov , T.S. Misnikova , Ya.A. Ryvkina , A.V. Koliadin , V.G. Vins","doi":"10.1016/j.diamond.2024.111763","DOIUrl":"10.1016/j.diamond.2024.111763","url":null,"abstract":"<div><div>The paper presents the results of experimental observation of two types of stimulated emission (SE) under pulsed laser pumping at 532 nm in diamond with NV centers. A comprehensive spectroscopic characterization of multisectorial HPHT diamond plate was performed. At low pumping power, the stimulated emission from NV¯ centers was recorded as a broad (≥80 nm wide) band with a maximum at 706 nm in the {111} and {311} sectors of the diamond plate. As the pump power increased in the {111} sector, narrow-band stimulated emission (<10 nm wide) was detected, with a maximum at 716 nm and a luminescence impulse duration of 1.5–3 ns. As the pump density increased, a fine structure in the spectrum of narrow-band stimulated emission was revealed for the first time. The concentration of NV¯ centers in the {111} and {311} growth sectors was ≈10 ppm. However, there were considerable differences in the concentrations of C (35 and 3.5 ppm) and C<sup>+</sup> centers (6.1 and 3.2 ppm, respectively). It was demonstrated that the presence of a high concentration of NV¯ centers is not the only necessary condition for the initiation of narrow-band SE in the 710–720 nm range. In the {311} sector, lighting at 360, 405, and 488 nm reduced the concentration of NV¯ centers by 15 % while increasing the concentration of C<sup>+</sup> centers in the {311} sector. This effect is weak in the {111} sector. The authors suggested a model for narrow-band SE at the transition Valence Band → C<sup>+</sup> with charge-state conversion of C↔C<sup>+</sup> and NV<sup>0</sup>↔NV¯ centers. Further research on the dynamic processes is required in order to a detailed understanding of the operation of NV centers in diamond during SE generation.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"150 ","pages":"Article 111763"},"PeriodicalIF":4.3,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663044","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