Diamond and Related Materials最新文献

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Thermochemical etching of polycrystalline diamond films by nickel
IF 4.3 3区 材料科学
Diamond and Related Materials Pub Date : 2025-02-28 DOI: 10.1016/j.diamond.2025.112164
Ondrej Szabó, Gabriel Vanko, Kateřina Aubrechtová Dragounová, Štěpán Potocký, Alexander Kromka
{"title":"Thermochemical etching of polycrystalline diamond films by nickel","authors":"Ondrej Szabó,&nbsp;Gabriel Vanko,&nbsp;Kateřina Aubrechtová Dragounová,&nbsp;Štěpán Potocký,&nbsp;Alexander Kromka","doi":"10.1016/j.diamond.2025.112164","DOIUrl":"10.1016/j.diamond.2025.112164","url":null,"abstract":"<div><div>This study investigates the deep etching characteristics of microcrystalline diamond films using a Ni-catalyzed thermochemical process conducted at different temperatures (750–975 °C) and gas compositions. Under H<sub>2</sub> microwave plasma conditions, minimal etching was observed beneath the Ni mask. Although introducing CO₂ into the gas mixture enhanced the etching rate by factors of 2–3, it resulted in non-selective etching of unmasked regions.</div><div>Changing to water vapor conditions led to superior etching selectivity, though the process was still pressure-dependent. At low pressure (65 mbar), catalytic etching achieved a maximum depth of 5–6 μm due to saturated graphitization around Ni. This limitation was overcome by increasing atmospheric pressure, enabling the formation of depth structures up to 20 μm with an etching rate of 45 μm/h. Temperature-dependent studies were conducted to evaluate the etch profile evolution. Using a 200 nm thick Ni mask at 900 °C under atmospheric pressure conditions, we achieved highly anisotropic etching with vertical sidewalls, contrasting with the sloped profiles typically observed in single-crystal diamond etching. This technology presents a cost-effective alternative to conventional dry plasma etching processes for fabricating complex 3D structures.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112164"},"PeriodicalIF":4.3,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578580","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
Nanoenhanced biolubricant for improving lubrication in roller bearing steel-steel contact surfaces - a comparative tribological study
IF 4.3 3区 材料科学
Diamond and Related Materials Pub Date : 2025-02-28 DOI: 10.1016/j.diamond.2025.112160
Santhosh Kumar Kamarapu , M. Amarnath , Saurabh Tiwari
{"title":"Nanoenhanced biolubricant for improving lubrication in roller bearing steel-steel contact surfaces - a comparative tribological study","authors":"Santhosh Kumar Kamarapu ,&nbsp;M. Amarnath ,&nbsp;Saurabh Tiwari","doi":"10.1016/j.diamond.2025.112160","DOIUrl":"10.1016/j.diamond.2025.112160","url":null,"abstract":"<div><div>The performance of roller bearings is often compromised by the excessive temperature rise and wear, which encourages the author to search for a more effective lubrication solution. This study examines the heat transfer capability of a bio-based nanolubricant blend to improve heat transfer and reduce wear in roller-bearing fatigue load conditions. In this study, <em>Elaeis guineensis</em> and mineral oil blend used in addition to functionalized multiwall carbon nanotubes. The lubricant's thermo-rheological results were evaluated over 1000 h of operation using NJ307 cylindrical roller bearings. The study quantified the lubricants rheological behaviour, film thickness, classification of wear debris, and changes in temperature with the proposed nanolubricant blend and compared the results with commercial grade lubricant. The findings indicated that the nanolubricant attained a temperature reduction of up to 37 % compared to traditional mineral oil. A significant surface wear reduction observed in nanolubricated bearing due to stable enhanced nanolubrication film developed between steel-steel contact surfaces. This experimental study provides substantial insights into nanomaterial-enhanced bio-lubricants, which demonstrate improved sustainability and performance in industrial bearing systems, hence promoting their potential commercial application.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112160"},"PeriodicalIF":4.3,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551990","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
In-situ microscopic observation of single-crystal diamond during chemical vapor deposition
IF 4.3 3区 材料科学
Diamond and Related Materials Pub Date : 2025-02-28 DOI: 10.1016/j.diamond.2025.112154
Kaishu Nitta, Takehiro Shimaoka, Hideaki Yamada, Nobuteru Tsubouchi, Akiyoshi Chayahara, Yoshiaki Mokuno
{"title":"In-situ microscopic observation of single-crystal diamond during chemical vapor deposition","authors":"Kaishu Nitta,&nbsp;Takehiro Shimaoka,&nbsp;Hideaki Yamada,&nbsp;Nobuteru Tsubouchi,&nbsp;Akiyoshi Chayahara,&nbsp;Yoshiaki Mokuno","doi":"10.1016/j.diamond.2025.112154","DOIUrl":"10.1016/j.diamond.2025.112154","url":null,"abstract":"<div><div>In this study, the temporal evolution of growing single-crystal diamond surfaces is microscopically observed during microwave plasma-enhanced chemical vapor deposition using an <em>in-situ</em> observation system equipped with a long-distance microscope. Growth on substrates with small off-axis angles from the (001) plane effectively induced a unidirectional lateral flow of surface structures. Introducing a small amount of nitrogen into the gas phase resulted in the formation of striped patterns owing to the macroscopic riser/terrace structures on the surface. At a relatively small off-axis angle of 2.7°, the surface remained relatively smooth over a growth period exceeding 15 h. The addition of nitrogen suppressed step motion and significantly reduced the lateral flow rate relative to the vertical growth rate. Raman spectroscopy revealed that a lower lateral-to-vertical growth rate ratio correlated with higher nitrogen concentrations in the grown diamond film, as indicated by the relative luminescence intensity of nitrogen vacancy centers. This study demonstrates a technique for monitoring and controlling surface morphology and, potentially, the physical properties of growing diamond films, contributing to advancements in diamond research and industrial applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112154"},"PeriodicalIF":4.3,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563363","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
Titanium and copper tailoring of fullerene (Cu-Ti@C60) as a sensor nanostructured for toxic gas pollutants: A DFT study
IF 4.3 3区 材料科学
Diamond and Related Materials Pub Date : 2025-02-27 DOI: 10.1016/j.diamond.2025.112147
Ekpenyong O. Okon , Gideon E. Mathias , Musa Runde , Mohammed Yaqob , Ahmed Adnan AL-Khafagi
{"title":"Titanium and copper tailoring of fullerene (Cu-Ti@C60) as a sensor nanostructured for toxic gas pollutants: A DFT study","authors":"Ekpenyong O. Okon ,&nbsp;Gideon E. Mathias ,&nbsp;Musa Runde ,&nbsp;Mohammed Yaqob ,&nbsp;Ahmed Adnan AL-Khafagi","doi":"10.1016/j.diamond.2025.112147","DOIUrl":"10.1016/j.diamond.2025.112147","url":null,"abstract":"<div><div>Here, a fullerene-based (C<sub>60</sub>) material comprising sixty carbon atoms was selected due to its advantageous properties including sensitivity, electrical conductivity, and having a structure that can be readily modified. The C<sub>60</sub> bare surface was further doped with Ti, a metal, and then decorated with Cu to improve its overall properties and enhance its adsorption of NO<sub>2</sub>, NO, CO<sub>2</sub>, CO, and SO<sub>2</sub> gasses using the density function theory (DFT) computation conducted at the PBE0/LanL2DZ level of theory. The surface Cu-Ti@C<sub>60</sub> was studied at the O, N, and C sites to determine the sites exhibiting the highest adsorption strength for the studied gases. The NO₂-N-Cu-Ti@C<sub>60</sub> complex possessed the most significant adsorption energy of −14.3571 eV while the CO<sub>2</sub> binding at the O-site exhibited the lowest adsorption energy of −0.58638 eV. This indicates that the Cu-Ti@C<sub>60</sub> surface binds greatly to the NO<sub>2</sub> and NO gases with a good adsorption strength observed for SO<sub>2</sub> gas. Also, there was a minimal change in the energy gap of the surface after adsorption with studied gases which showcased the stability of the systems. These analyses carried out in this study position Cu-Ti@C<sub>60</sub> surface to be a promising material in developing a sensor device for NO<sub>2</sub>, NO, CO<sub>2</sub>, CO, and SO<sub>2</sub> with a strong adsorption rate for NO<sub>2</sub>, NO, SO<sub>2</sub>, CO, CO<sub>2</sub> in a descending sequence.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112147"},"PeriodicalIF":4.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529243","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
Low-temperature formation of pure SiC-modified layer on diamond surface by reaction with Mg2Si
IF 4.3 3区 材料科学
Diamond and Related Materials Pub Date : 2025-02-27 DOI: 10.1016/j.diamond.2025.112159
Junguo Li , Feng Jiang , Chenhan Zhao , Shuaijie Huan , Fei Tang , Qianqian Xiang , Meijuan Li , Jian Zhang , Qiang Shen
{"title":"Low-temperature formation of pure SiC-modified layer on diamond surface by reaction with Mg2Si","authors":"Junguo Li ,&nbsp;Feng Jiang ,&nbsp;Chenhan Zhao ,&nbsp;Shuaijie Huan ,&nbsp;Fei Tang ,&nbsp;Qianqian Xiang ,&nbsp;Meijuan Li ,&nbsp;Jian Zhang ,&nbsp;Qiang Shen","doi":"10.1016/j.diamond.2025.112159","DOIUrl":"10.1016/j.diamond.2025.112159","url":null,"abstract":"<div><div>Diamond/Cu composites commonly require formation of a carbide-modified layer to improve interfacial adhesion. SiC, when applied as a modification layer, has the advantage of high thermal conductivity and a matched coefficient of thermal expansion. However, the high temperatures for the formation of SiC can lead to graphitization of diamond. In this work, a SiC-modified layer successfully forms at low temperatures on the diamond surface through a molten-salt method with Mg<sub>2</sub>Si as the silicon source. The effects of temperature and time on SiC-formation and diamond-graphitization are investigated. The results show that a pure SiC-modified layer can be formed on the diamond surface at 1000 °C without leading to graphitization of diamond. The SiC-modified diamond/Cu composite shows an improved thermal conductivity of 469.1 W·m<sup>−1</sup>·K<sup>−1</sup>, even with a relative density of only 96.2 %.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112159"},"PeriodicalIF":4.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519345","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
Magnetic/ceramic/conductive nanocomposite with a broadband microwave absorption and an effective RCS and far field reduction
IF 4.3 3区 材料科学
Diamond and Related Materials Pub Date : 2025-02-27 DOI: 10.1016/j.diamond.2025.112145
Hoda Hekmatara, Mahdieh Dehghani-Dashtabi, Seyyed Mahdy Baizaee, Masoud Mohebbi, Shabnam Nouradini
{"title":"Magnetic/ceramic/conductive nanocomposite with a broadband microwave absorption and an effective RCS and far field reduction","authors":"Hoda Hekmatara,&nbsp;Mahdieh Dehghani-Dashtabi,&nbsp;Seyyed Mahdy Baizaee,&nbsp;Masoud Mohebbi,&nbsp;Shabnam Nouradini","doi":"10.1016/j.diamond.2025.112145","DOIUrl":"10.1016/j.diamond.2025.112145","url":null,"abstract":"<div><div>Designing light weight and thin radar absorber composites with a broad absorption bandwidth which cover the whole frequency bands can be crucial to overcome the serious problem of electromagnetic pollution. FeNi-NiO/SiO<sub>2</sub>/GO‌‌‌‌‌‌ magnetic/ceramic/conductive nanocomposites which were prepared by decorating FeNi-NiO/SiO<sub>2</sub> magnetic/ceramic NPs on the GO sheets with the certain weight ratios of 1:1, 1:2 and 1:3 show broad absorption bandwidth at low thickness. The lowest reflection loss (RL<sub>min</sub> = −49.12 dB) was observed for FeNi-NiO/SiO<sub>2</sub>/GO 1:3 at 1.7 mm thick, with an effective bandwidth of 8.2GHz (8.23-18GHz). However, the broadest bandwidth was observed for the FeNi-NiO/SiO<sub>2</sub>/GO 1:1 at 1.7 mm, which covers the entire band in the range of 8-18GHz with RL<sub>min</sub> = −38.53 dB. An excellent microwave absorption performance of FeNi-NiO/SiO<sub>2</sub>/GO nanocomposites originated from dielectric/magnetic/conduction loss synergy. The radar cross section (RCS) and far field calculation showed that by covering a typical perfect electrical conductor (PEC) sphere with nanocomposites, the RCS and far field reduced 30-48 dB and 20-30 dB, respectively, in comparison with uncovered PEC.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112145"},"PeriodicalIF":4.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529244","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
Exploring the friction mechanism of a-C:H:Si:O film under water-lubricated condition
IF 4.3 3区 材料科学
Diamond and Related Materials Pub Date : 2025-02-27 DOI: 10.1016/j.diamond.2025.112162
Pingmei Yin , Renlong Dai , Lei Yang , Zhengyu Liu , Xubing Wei , Yifei Xu , Wangjun Cheng , Yaoning Sun , Guangan Zhang
{"title":"Exploring the friction mechanism of a-C:H:Si:O film under water-lubricated condition","authors":"Pingmei Yin ,&nbsp;Renlong Dai ,&nbsp;Lei Yang ,&nbsp;Zhengyu Liu ,&nbsp;Xubing Wei ,&nbsp;Yifei Xu ,&nbsp;Wangjun Cheng ,&nbsp;Yaoning Sun ,&nbsp;Guangan Zhang","doi":"10.1016/j.diamond.2025.112162","DOIUrl":"10.1016/j.diamond.2025.112162","url":null,"abstract":"<div><div>In this study, comparing friction behaviors of a-C:H:Si:O films under dry-friction and water-lubricated conditions revealed key findings. Under water-lubricated condition, the wear rate of a-C:H:Si:O films exhibit a trend of initial decrease followed by an increase with increasing Si content. Specifically, at a Si content of 7.8 at.%, the wear rate of the films drops significantly from 13.0 × 10<sup>−8</sup> mm<sup>3</sup>/Nm under dry-friction to 1.40 × 10<sup>−8</sup> mm<sup>3</sup>/Nm under water-lubricated condition, demonstrating excellent wear resistance. However, when the Si content increases to 14.1 at.%, the wear rate gradually rises to 17.10 × 10<sup>−8</sup> mm<sup>3</sup>/Nm. This increase is primarily attributed to intensified tribo-chemical reactions induced by excessively high Si content, coupled with the mobility of water facilitating the migration of wear debris to the friction interface, ultimately leading to abrasive wear. This finding not only reveals the influence of Si content on the wear resistance of the films but also provides an important basis for optimizing tribological performance under water-lubricated condition.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112162"},"PeriodicalIF":4.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527351","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
Facile fabrication of CeNiO3/rGO nanohybrid for high performance supercapacitor
IF 4.3 3区 材料科学
Diamond and Related Materials Pub Date : 2025-02-27 DOI: 10.1016/j.diamond.2025.112153
Abdul Khaliq , Ashraf M.M. Abdelbacki , Samira Elaissi , A. Dahshan , Muhammad Jahangir Khan , Khursheed Ahmad
{"title":"Facile fabrication of CeNiO3/rGO nanohybrid for high performance supercapacitor","authors":"Abdul Khaliq ,&nbsp;Ashraf M.M. Abdelbacki ,&nbsp;Samira Elaissi ,&nbsp;A. Dahshan ,&nbsp;Muhammad Jahangir Khan ,&nbsp;Khursheed Ahmad","doi":"10.1016/j.diamond.2025.112153","DOIUrl":"10.1016/j.diamond.2025.112153","url":null,"abstract":"<div><div>Advancements in cleaner and more efficient energy storage and conversion technologies are crucial for reducing environmental pollution and combating the growing demand for fossil fuel use. Supercapacitors (SC<sub>s</sub>) are energy-storing devices that are currently receiving a lot of attention from researchers. Furthermore, it is still difficult to create cost-effective SC<sub>s</sub> electrode materials while having higher capacitive qualities, structural integrity and appropriate energy efficiency employing transition metal oxides. The CeNiO<sub>3</sub>/rGO nanohybrid was synthesized utilizing a cost-effective hydrothermal method. However, the CeNiO<sub>3</sub>/rGO nanohybrid displayed the capacitance of 2015.78 F g<sup>−1</sup> and energy density of 58.51 Wh kg<sup>−1</sup>, power density (275 W kg<sup>−1</sup>) and exhibited remarkable cyclic stability after 5000<sup>th</sup> cycle. Additionally, electrochemical characteristics of CeNiO<sub>3</sub>/rGO nanohybrid were higher than CeNiO<sub>3</sub> are related to large interfacial area, low resistances and quick ion transportation. However, CeNiO<sub>3</sub>/rGO nanohybrid can be utilized as an electrode in energy storing devices.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112153"},"PeriodicalIF":4.3,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578391","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
Hydrogenated diamond-like carbon films grown by a beam plasma source
IF 4.3 3区 材料科学
Diamond and Related Materials Pub Date : 2025-02-26 DOI: 10.1016/j.diamond.2025.112138
Tabitha A. Amollo , Keliang Wang , Nina Baule , Lars Haubold , Qi Hua Fan
{"title":"Hydrogenated diamond-like carbon films grown by a beam plasma source","authors":"Tabitha A. Amollo ,&nbsp;Keliang Wang ,&nbsp;Nina Baule ,&nbsp;Lars Haubold ,&nbsp;Qi Hua Fan","doi":"10.1016/j.diamond.2025.112138","DOIUrl":"10.1016/j.diamond.2025.112138","url":null,"abstract":"<div><div>Diamond like carbon (DLC) is an amorphous form of carbon consisting of <em>sp</em><sup><em>2</em></sup> and <em>sp</em><sup><em>3</em></sup> hybridized carbon atoms and hydrogen. It is characterized by unique properties which suit it as a protective coating in various applications. DLC thin films are commonly produced by plasma-enhanced chemical vapor deposition (PECVD). This study reports the growth of hydrogenated DLC thin films using a novel broad beam plasma source, which enables simultaneous ion bombardments to the surface atoms and produces dense films at room temperature. A key advantage of the broad beam ion source is that it can independently control the ion flux and ion energy (20–200 eV) and thus, DLC film microstructures and properties. The film growth rates were proportional to the ion flux density, which in turn was proportional to the plasma density. An optimum ion energy of ~120 eV was identified. The DLC films exhibited high optical transmittance of 90 % from the visible to the infrared region. The optical band gaps were in the range of 2.20–2.28 eV. The prepared films exhibited a density of 1.905 g/cm<sup>3</sup> and Young's modulus of 75 GPa. A potential application of such DLC films is as moisture barrier coatings on plastics, which require low-temperature processing.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112138"},"PeriodicalIF":4.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527350","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
Selective H2S sensor with CdS@PPy/rGO nanocomposite for sustainable air quality monitoring
IF 4.3 3区 材料科学
Diamond and Related Materials Pub Date : 2025-02-26 DOI: 10.1016/j.diamond.2025.112155
H.M. Ragab , N.S. Diab , Ghadah Mohammad Aleid , Rosilah Ab Aziz , Sofian Talal Obeidat , N. Yusof , Maamon A. Farea
{"title":"Selective H2S sensor with CdS@PPy/rGO nanocomposite for sustainable air quality monitoring","authors":"H.M. Ragab ,&nbsp;N.S. Diab ,&nbsp;Ghadah Mohammad Aleid ,&nbsp;Rosilah Ab Aziz ,&nbsp;Sofian Talal Obeidat ,&nbsp;N. Yusof ,&nbsp;Maamon A. Farea","doi":"10.1016/j.diamond.2025.112155","DOIUrl":"10.1016/j.diamond.2025.112155","url":null,"abstract":"<div><div>In this study, a highly sensitive and selective H₂S gas sensor was developed using a CdS@PPy/rGO nanocomposite synthesized through a facile fabrication process. Conductivity, sensitivity, response/recovery durations, stability, and selectivity were all significantly enhanced by the incorporation of reduced graphene oxide (rGO) and cadmium sulfide (CdS) nanoparticles into the polypyrrole (PPy) matrix. The chemoresistive sensor exhibited a remarkable response of 98.98 % to 70 ppm of H<sub>2</sub>S gas, which is approximately five times higher than pure PPy and three times higher than the PPy/rGO hybrids. Notably, the sensor demonstrated remarkable stability over 50 days with no performance deterioration, and it exhibited quick reaction and recovery times of 128 s and 131 s, respectively. Furthermore, the CdS@PPy/rGO sensor demonstrated excellent selectivity towards H<sub>2</sub>S, maintaining its high performance even in the presence of interfering gases such as SO<sub>2</sub>, NH<sub>3</sub>, CO, and NO<sub>2</sub>. Mechanistic analysis revealed that the synergistic effect of rGO and CdS nanoparticles enhanced the adsorption and electron transfer interactions between the composite and H<sub>2</sub>S molecules. This work highlights the potential of CdS@PPy/rGO nanocomposites as advanced materials for real-time environmental monitoring and industrial safety applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112155"},"PeriodicalIF":4.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510888","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
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