Diamond and Related Materials最新文献

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Printable FET sensors with using GNH/MnO2 as channel material for non-enzymatic detection of bilirubin

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-03-06 DOI: 10.1016/j.diamond.2025.112187

Duy Hai Bui , Thi Thu Vu , Benoit Piro , Thi Thanh Ngan Nguyen

The accurate detection of bilirubin biomarker is vital for diagnosis of liver diseases. In this study, a novel field-effect-transistor sensor (FET) using aminated reduced graphene oxide flakes (GNH) decorated with manganese dioxide (MnO₂) as channel material has been introduced. The channel material (GNH/MnO₂) was first prepared via in-situ chemical reduction of Mn ions on the aminated reduced graphene oxide flakes, then formulated in ink solution, and finally printed on the channel of the device using extrusion printing method. The results showed the growth of needle-like MnO₂ nanostructure (firmly anchored on graphite flakes) which can act as an excellent catalyst for the oxidation reaction of bilirubin in the later sensing tests. Upon the addition of the targeted molecule (bilirubin), the charge neutrality point was significantly shifted when GNH/MnO₂ was used as the channel material (+25 mV) whereas this point was just slightly shifted (+0.1 mV) when MnO₂ was not introduced. The use of extrusion printing technique has also provided us with a conventional approach to produce low-cost devices with good reproducibility. The as-prepared FET sensors were able to detect bilirubin with a limit of detection (LOD) as low as 10⁻¹¹ M with good repeatability (relative standard deviation, RSD = 2.64 %). This research has demonstrated the potential application of printable sensing devices integrated with functional nanomaterials as advanced diagnostic tools.

{"title":"Printable FET sensors with using GNH/MnO2 as channel material for non-enzymatic detection of bilirubin","authors":"Duy Hai Bui , Thi Thu Vu , Benoit Piro , Thi Thanh Ngan Nguyen","doi":"10.1016/j.diamond.2025.112187","DOIUrl":"10.1016/j.diamond.2025.112187","url":null,"abstract":"<div><div>The accurate detection of bilirubin biomarker is vital for diagnosis of liver diseases. In this study, a novel field-effect-transistor sensor (FET) using aminated reduced graphene oxide flakes (GNH) decorated with manganese dioxide (MnO<sub>2</sub>) as channel material has been introduced. The channel material (GNH/MnO<sub>2</sub>) was first prepared via in-situ chemical reduction of Mn ions on the aminated reduced graphene oxide flakes, then formulated in ink solution, and finally printed on the channel of the device using extrusion printing method. The results showed the growth of needle-like MnO<sub>2</sub> nanostructure (firmly anchored on graphite flakes) which can act as an excellent catalyst for the oxidation reaction of bilirubin in the later sensing tests. Upon the addition of the targeted molecule (bilirubin), the charge neutrality point was significantly shifted when GNH/MnO<sub>2</sub> was used as the channel material (+25 mV) whereas this point was just slightly shifted (+0.1 mV) when MnO<sub>2</sub> was not introduced. The use of extrusion printing technique has also provided us with a conventional approach to produce low-cost devices with good reproducibility. The as-prepared FET sensors were able to detect bilirubin with a limit of detection (LOD) as low as 10<sup>−11</sup> M with good repeatability (relative standard deviation, RSD = 2.64 %). This research has demonstrated the potential application of printable sensing devices integrated with functional nanomaterials as advanced diagnostic tools.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112187"},"PeriodicalIF":4.3,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601277","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

Microstructural, mechanical and tribological performances of DLC/CrN multilayer films with different modulation period

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-03-05 DOI: 10.1016/j.diamond.2025.112163

Yanchao Zhao, Feng Xu, Liu Yuan, Wenxuan Zhao, Hailong Zhang, Dunwen Zuo

Multilayer structure design is an effective method to improve the mechanical and tribological properties of hard films. In this work, diamond-like carbon (DLC)/CrN multilayer composite films with varying modulation periods were successfully deposited on 35Cr2Ni4MoA steel and Si substrates using unbalanced magnetron sputtering, and the microstructure, mechanical and tribological performances of DLC/CrN multilayer composite films were analyzed detailedly. SEM and TEM characterization confirmed that the DLC/CrN multilayer composite films consist of alternating amorphous DLC layers and crystalline CrN layers. The intensity of the (111) diffraction peaks in DLC multilayer composite film exhibited a varying degree of reduction, and the 2θ positions of the (111) and (200) diffraction peaks showed a slight rightward shift. Raman analysis shown that the modulation period had a negligible impact on the sp³ hybridized carbon content of DLC/CrN multilayer composite films. Reduced residual stress and enhanced toughness by designing multilayer structural with modulation periods. As the modulation period decreased, the hardness and elastic modulus of DLC multilayer composite films increased. The tribological performances indicated that the primary wear mechanism between DLC/CrN multilayer composite films and Si₃N₄ ball in an atmospheric environment was abrasive wear, and film M2 exhibited the best tribological performance. Compared to single-layer DLC films, the residual stress of DLC/CrN multilayer composite films has been reduced by more than half, and the fracture toughness and wear rate have been significantly improved.

{"title":"Microstructural, mechanical and tribological performances of DLC/CrN multilayer films with different modulation period","authors":"Yanchao Zhao, Feng Xu, Liu Yuan, Wenxuan Zhao, Hailong Zhang, Dunwen Zuo","doi":"10.1016/j.diamond.2025.112163","DOIUrl":"10.1016/j.diamond.2025.112163","url":null,"abstract":"<div><div>Multilayer structure design is an effective method to improve the mechanical and tribological properties of hard films. In this work, diamond-like carbon (DLC)/CrN multilayer composite films with varying modulation periods were successfully deposited on 35Cr2Ni4MoA steel and Si substrates using unbalanced magnetron sputtering, and the microstructure, mechanical and tribological performances of DLC/CrN multilayer composite films were analyzed detailedly. SEM and TEM characterization confirmed that the DLC/CrN multilayer composite films consist of alternating amorphous DLC layers and crystalline CrN layers. The intensity of the (111) diffraction peaks in DLC multilayer composite film exhibited a varying degree of reduction, and the 2θ positions of the (111) and (200) diffraction peaks showed a slight rightward shift. Raman analysis shown that the modulation period had a negligible impact on the sp<sup>3</sup> hybridized carbon content of DLC/CrN multilayer composite films. Reduced residual stress and enhanced toughness by designing multilayer structural with modulation periods. As the modulation period decreased, the hardness and elastic modulus of DLC multilayer composite films increased. The tribological performances indicated that the primary wear mechanism between DLC/CrN multilayer composite films and Si<sub>3</sub>N<sub>4</sub> ball in an atmospheric environment was abrasive wear, and film M2 exhibited the best tribological performance. Compared to single-layer DLC films, the residual stress of DLC/CrN multilayer composite films has been reduced by more than half, and the fracture toughness and wear rate have been significantly improved.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112163"},"PeriodicalIF":4.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578393","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

Uniformly dispersed Co2P nanoparticles decorated hollow carbon spheres used as anode for sodium-ion batteries with superior long-term performance

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-03-04 DOI: 10.1016/j.diamond.2025.112170

Hui Ao, Weiguo Yao, Yanan Gong, Kaifeng Yu, Ce Liang

Utilizing a straightforward two-step hydrothermal approach, ZIF-67 is employed as a sacrificial template to effectively synthesize a highly efficient and stable Co₂P@HCS composite material for sodium ion storage, wherein Co₂P nanoparticles are uniformly distributed on the surface of hollow carbon spheres (HCS). The composite material possesses a distinctive multi-polar hollow architecture, integrating the synergistic benefits of its exterior Co₂P phase and interior HCS. CO₂P demonstrates considerable potential for sodium storage, and the hollow carbon spheres facilitates enhanced charge transfer and offer superior stability, effectively accommodating the volume variation of the Co₂P phase during the cycling process. Experimental outcomes reveal that the Co₂P@HCS electrode exhibits exceptional sodium storage performance. For instance, following 200 cycles at a current density of 250 mAh g⁻¹, the material achieves a capacity of 262.5 mAh g⁻¹; furthermore, even after 3000 cycles at a current density of 2500 mAh g⁻¹, it sustaines a capacity of 109.8 mAh g⁻¹. This synthetic method holds significant potential in the preparation of MOFs (metal-organic frameworks) and metal phosphide-based carbon composite materials, particularly for applications in energy storage.

{"title":"Uniformly dispersed Co2P nanoparticles decorated hollow carbon spheres used as anode for sodium-ion batteries with superior long-term performance","authors":"Hui Ao, Weiguo Yao, Yanan Gong, Kaifeng Yu, Ce Liang","doi":"10.1016/j.diamond.2025.112170","DOIUrl":"10.1016/j.diamond.2025.112170","url":null,"abstract":"<div><div>Utilizing a straightforward two-step hydrothermal approach, ZIF-67 is employed as a sacrificial template to effectively synthesize a highly efficient and stable Co<sub>2</sub>P@HCS composite material for sodium ion storage, wherein Co<sub>2</sub>P nanoparticles are uniformly distributed on the surface of hollow carbon spheres (HCS). The composite material possesses a distinctive multi-polar hollow architecture, integrating the synergistic benefits of its exterior Co<sub>2</sub>P phase and interior HCS. CO<sub>2</sub>P demonstrates considerable potential for sodium storage, and the hollow carbon spheres facilitates enhanced charge transfer and offer superior stability, effectively accommodating the volume variation of the Co<sub>2</sub>P phase during the cycling process. Experimental outcomes reveal that the Co<sub>2</sub>P@HCS electrode exhibits exceptional sodium storage performance. For instance, following 200 cycles at a current density of 250 mAh g<sup>−1</sup>, the material achieves a capacity of 262.5 mAh g<sup>−1</sup>; furthermore, even after 3000 cycles at a current density of 2500 mAh g<sup>−1</sup>, it sustaines a capacity of 109.8 mAh g<sup>−1</sup>. This synthetic method holds significant potential in the preparation of MOFs (metal-organic frameworks) and metal phosphide-based carbon composite materials, particularly for applications in energy storage.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112170"},"PeriodicalIF":4.3,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551992","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

Moiré-diamond formed via interlayer covalent transition in twisted multilayer graphene under compression

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-03-04 DOI: 10.1016/j.diamond.2025.112161

Yaomin Li, Bin Zhang

Moiré lattice reconstruction and interlayer covalent transition in twisted multilayer graphene under uniaxial compression is investigated by density functional theory (DFT). Results show that the Moiré superlattice undergoes local rotational reconstruction amidst in-plane anisotropic strain induced by perpendicular pressure, coupled with shear effects at Moiré interference regions, prompting interlayer charge redistribution, which triggers a covalent bonding transition and forms a sp³ hybridized phase with Moiré periodicity, Moiré-diamond (m-dia). The m-dia exhibits a modulus, comparable to diamond, displays anisotropic characteristics, theoretical hardness up to 90.6 GPa, with tensile strength reaching 88.5 GPa. Meanwhile, large-scale molecular dynamics simulations reveal the coexistence of brittleness and ductility, attributed to pre-existing stress concentrated at Moiré periodic boundaries and the propagation of localized structural collapse. Evaluation of electrical properties confirms m-dia as a semiconductor, boasting an indirect bandgap of 5.44 eV (HSE06). These findings redefine the mechanical and electrostatic potential of Moiré-engineered superlattices, offering insight into how twist and pressure drive novel lattice architectures and functional properties in carbon systems.

{"title":"Moiré-diamond formed via interlayer covalent transition in twisted multilayer graphene under compression","authors":"Yaomin Li, Bin Zhang","doi":"10.1016/j.diamond.2025.112161","DOIUrl":"10.1016/j.diamond.2025.112161","url":null,"abstract":"<div><div>Moiré lattice reconstruction and interlayer covalent transition in twisted multilayer graphene under uniaxial compression is investigated by density functional theory (DFT). Results show that the Moiré superlattice undergoes local rotational reconstruction amidst in-plane anisotropic strain induced by perpendicular pressure, coupled with shear effects at Moiré interference regions, prompting interlayer charge redistribution, which triggers a covalent bonding transition and forms a <em>sp</em><sup>3</sup> hybridized phase with Moiré periodicity, Moiré-diamond (<em>m</em>-dia). The <em>m</em>-dia exhibits a modulus, comparable to diamond, displays anisotropic characteristics, theoretical hardness up to 90.6 GPa, with tensile strength reaching 88.5 GPa. Meanwhile, large-scale molecular dynamics simulations reveal the coexistence of brittleness and ductility, attributed to pre-existing stress concentrated at Moiré periodic boundaries and the propagation of localized structural collapse. Evaluation of electrical properties confirms <em>m</em>-dia as a semiconductor, boasting an indirect bandgap of 5.44 eV (HSE06). These findings redefine the mechanical and electrostatic potential of Moiré-engineered superlattices, offering insight into how twist and pressure drive novel lattice architectures and functional properties in carbon systems.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112161"},"PeriodicalIF":4.3,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578575","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

Atomically flat high-purity (100) diamond surfaces: Conductivity of hydrogen terminated diamond

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-03-04 DOI: 10.1016/j.diamond.2025.112181

Zichen Zhao , Yupeng Liu , Jie Li , Guozhao Ren , Xiaolu Yuan , Mingming Guo , Liangxian Chen , Jianjun Zhang , Junjun Wei , Jianlin Li , Jinlong Liu , Chengming Li

As an ideal candidate material for semiconductor devices, diamond exhibits remarkable potential in high-frequency and high-power applications due to its unique electrical properties. However, surface and bulk defects significantly impede its semiconductor performance due to the surface roughness scattering and impurity ionization scattering. In this work, based on the high-purity diamond materials with impurity levels below 5 ppb, atomic-level surface planarization of (100) single-crystal diamond (SCD) was achieved using a combination of mechanical polishing and chemical mechanical polishing (CMP) techniques. The effects of the surface roughness on the surface conductivity of hydrogen-terminated diamond were systematically evaluated. The results demonstrate that subsurface damage on the CMP diamond surface is removed through oxidation, reducing the surface roughness to Ra = 0.0973 nm over a 5 × 5 μm² area. Following hydrogenation treatment, the surface sheet resistance of hydrogen-terminated diamond with atomic-level flatness was significantly reduced to 1.03 kΩ/□, accompanied by a carrier mobility of 237 cm²/Vs. These findings confirm that CMP polishing significantly enhances the conductivity of hydrogen-terminated diamond. This work provides theoretical insights and technical guidance for the fabrication of high-performance diamond-based semiconductor devices.

{"title":"Atomically flat high-purity (100) diamond surfaces: Conductivity of hydrogen terminated diamond","authors":"Zichen Zhao , Yupeng Liu , Jie Li , Guozhao Ren , Xiaolu Yuan , Mingming Guo , Liangxian Chen , Jianjun Zhang , Junjun Wei , Jianlin Li , Jinlong Liu , Chengming Li","doi":"10.1016/j.diamond.2025.112181","DOIUrl":"10.1016/j.diamond.2025.112181","url":null,"abstract":"<div><div>As an ideal candidate material for semiconductor devices, diamond exhibits remarkable potential in high-frequency and high-power applications due to its unique electrical properties. However, surface and bulk defects significantly impede its semiconductor performance due to the surface roughness scattering and impurity ionization scattering. In this work, based on the high-purity diamond materials with impurity levels below 5 ppb, atomic-level surface planarization of (100) single-crystal diamond (SCD) was achieved using a combination of mechanical polishing and chemical mechanical polishing (CMP) techniques. The effects of the surface roughness on the surface conductivity of hydrogen-terminated diamond were systematically evaluated. The results demonstrate that subsurface damage on the CMP diamond surface is removed through oxidation, reducing the surface roughness to Ra = 0.0973 nm over a 5 × 5 μm<sup>2</sup> area. Following hydrogenation treatment, the surface sheet resistance of hydrogen-terminated diamond with atomic-level flatness was significantly reduced to 1.03 kΩ/□, accompanied by a carrier mobility of 237 cm<sup>2</sup>/Vs. These findings confirm that CMP polishing significantly enhances the conductivity of hydrogen-terminated diamond. This work provides theoretical insights and technical guidance for the fabrication of high-performance diamond-based semiconductor devices.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112181"},"PeriodicalIF":4.3,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578579","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

Ablation behavior of graphite-film-modified C/C and C/C-(Hf, Ta)C-SiC composites

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-03-04 DOI: 10.1016/j.diamond.2025.112169

Lei Chen , Xin Yang , Cunqian Fang , Anhong Shi , Ze Zhang , Qizhong Huang

In order to improve the ablation resistance of C/C composites, graphite films (GFs) and (Hf, Ta)C-SiC ceramic were introduced as high thermal conductivity and anti-oxidation components respectively. And the continuous heat conduction channel of GFs led to a 28 % improvement in the thermal conductivity of C/C-GFs composites. Meanwhile, the linear ablation rate of C/C-GFs composite decreased 26.9 %, also benefiting from the less defects of GFs. Furthermore, C/C-(Hf, Ta)C-SiC composite was fabricated through precursor infiltration pyrolysis method and the influence of solid solution degree of (Hf, Ta)C ceramic on the ablation resistance was investigated. It revealed that the full solid solution of (Hf, Ta)C ceramic promoted the generation of Hf₆Ta₂O₁₇ and (Hf, Ta, O) phases which possess high melting points. And more oxide phases coated on the composite surface, thus enhanced the ablation property of the C/C-GFs-(Hf, Ta)C-SiC composites.

引用次数: 0

Blue florescent carbon nanoparticles as sensor probe and paper based microfluidic device for Hg2+ ion detection.

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-03-03 DOI: 10.1016/j.diamond.2025.112158

Ranjeeta Singh , Sanjyokta Borah , Unmilita Phukan , Prianku Pratim Neog , Dhrubajit Borah , Dipjyoti Dutta , Akash Bose , Jayanta Kumar Sarmah , Rekha Rani Dutta

This study reports the application of fluorescent blue carbon nanoparticles as a sensing probe for the detection of Hg²⁺ ion on microfluidic paper based device (μPAD) as well as in aqueous medium. Florescent blue carbon nanoparticles are synthesised from waste sweet potato peels through a facile one-step hydrothermal method. The development of the microfluidic paper-based device (μPAD) is carried out by using Whatman 42 filter paper through laser engraving technique. For aqueous medium detection, the fluorescence spectra of carbon nanoparticles are analysed in presence of various concentration of Hg²⁺ ions. MATLAB R2023b is used for the study of the fluorescence colour variation to show precise and acceptable results of detection on paper based device. The Limit of detection for both the sensing routes are evaluated and found to 1.54 ppb for μPAD and 2.48 ppb in aqueous medium. The results demonstrated that the proposed μPAD sensor can show accuracy and precision agreement with standard florescence sensing in aqueous medium. The developed μPAD can also perform complicated analyses involving multiple steps reactions in a single step by using very small amount of analytical sample. Beside this, fluorescence colour intensity of carbon nanoparticles exist for a longer period on paper making the μPAD sensing route as an efficient one. This study highlights the novel use of bio-precursor based carbon nanoparticles as sensing probe and suggests their potential in future nanodevice construction.

{"title":"Blue florescent carbon nanoparticles as sensor probe and paper based microfluidic device for Hg2+ ion detection.","authors":"Ranjeeta Singh , Sanjyokta Borah , Unmilita Phukan , Prianku Pratim Neog , Dhrubajit Borah , Dipjyoti Dutta , Akash Bose , Jayanta Kumar Sarmah , Rekha Rani Dutta","doi":"10.1016/j.diamond.2025.112158","DOIUrl":"10.1016/j.diamond.2025.112158","url":null,"abstract":"<div><div>This study reports the application of fluorescent blue carbon nanoparticles as a sensing probe for the detection of Hg<sup>2+</sup> ion on microfluidic paper based device (μPAD) as well as in aqueous medium. Florescent blue carbon nanoparticles are synthesised from waste sweet potato peels through a facile one-step hydrothermal method. The development of the microfluidic paper-based device (μPAD) is carried out by using Whatman 42 filter paper through laser engraving technique. For aqueous medium detection, the fluorescence spectra of carbon nanoparticles are analysed in presence of various concentration of Hg<sup>2+</sup> ions. MATLAB R2023b is used for the study of the fluorescence colour variation to show precise and acceptable results of detection on paper based device. The Limit of detection for both the sensing routes are evaluated and found to 1.54 ppb for μPAD and 2.48 ppb in aqueous medium. The results demonstrated that the proposed μPAD sensor can show accuracy and precision agreement with standard florescence sensing in aqueous medium. The developed μPAD can also perform complicated analyses involving multiple steps reactions in a single step by using very small amount of analytical sample. Beside this, fluorescence colour intensity of carbon nanoparticles exist for a longer period on paper making the μPAD sensing route as an efficient one. This study highlights the novel use of bio-precursor based carbon nanoparticles as sensing probe and suggests their potential in future nanodevice construction.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112158"},"PeriodicalIF":4.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578574","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

Microplasma-assisted synthesis and regulation the luminescence performance of glucose-based carbon dots by sodium borohydride

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-03-03 DOI: 10.1016/j.diamond.2025.112168

A.A. Tyutrin , A.L. Rakevich , E.F. Martynovich

The effect of sodium borohydride (NaBH₄) on the luminescent properties of glucose-based carbon dots synthesized by the plasma method is investigated. The spectral and kinetic properties of the carbon dots were studied using a MicroTime 200 confocal scanning fluorescence microscope. The lower concentration limit of NaBH₄ was established at which there is an enhancement of the CDs luminescence intensity. It was found that adding of sodium borohydride to the CDs solution at concentration below 2.5 mg/mL leads to an increase in the luminescence intensity, while a decrease in intensity is noted at concentrations above 2.5 mg/mL. Enhancement of the luminescence intensity by 2.8 times was detected for the sample with the mass fraction of NaBH₄ was 0.04 % in the solution. Using the time-correlated photon counting method, it was shown that the luminescence decay kinetics is described by a tri-exponential function. It has been experimentally demonstrated that the fast luminescence time component is related to the carbonyl functional group on the carbon dots surface.

{"title":"Microplasma-assisted synthesis and regulation the luminescence performance of glucose-based carbon dots by sodium borohydride","authors":"A.A. Tyutrin , A.L. Rakevich , E.F. Martynovich","doi":"10.1016/j.diamond.2025.112168","DOIUrl":"10.1016/j.diamond.2025.112168","url":null,"abstract":"<div><div>The effect of sodium borohydride (NaBH<sub>4</sub>) on the luminescent properties of glucose-based carbon dots synthesized by the plasma method is investigated. The spectral and kinetic properties of the carbon dots were studied using a MicroTime 200 confocal scanning fluorescence microscope. The lower concentration limit of NaBH<sub>4</sub> was established at which there is an enhancement of the CDs luminescence intensity. It was found that adding of sodium borohydride to the CDs solution at concentration below 2.5 mg/mL leads to an increase in the luminescence intensity, while a decrease in intensity is noted at concentrations above 2.5 mg/mL. Enhancement of the luminescence intensity by 2.8 times was detected for the sample with the mass fraction of NaBH<sub>4</sub> was 0.04 % in the solution. Using the time-correlated photon counting method, it was shown that the luminescence decay kinetics is described by a tri-exponential function. It has been experimentally demonstrated that the fast luminescence time component is related to the carbonyl functional group on the carbon dots surface.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"154 ","pages":"Article 112168"},"PeriodicalIF":4.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143551991","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

Effect of polycarbonate for preparation of mesophase pitch via co‑carbonization and their resulting high-performance carbon fibers

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-03-03 DOI: 10.1016/j.diamond.2025.112166

Khushboo Kumari , Sonu Rani , Pankaj Kumar , Vishal Tiwari , Sanjay R. Dhakate , Saroj Kumari

Framing high-performance carbon fiber (HPCF) requires mesophase pitch (MP) having an adequate amount of anisotropic content with excellent orientation and melt flow structure. Typically, MP formation requires high temperature to generate free radicals, which has prompted the quest for low-energy consumption approaches. This study disclosed a simple and cost-effective method for synthesizing highly spinnable MP via co‑carbonization of coal tar pitch (CTP) with polycarbonate (PC). Initially, PC (0–25 wt%) was melded into CTP to prepare various isotropic pitches (IP), which were further transformed into MPs by treating at 400 °C for 4 h. After analysis, 15 wt% PC appeared efficacious for anisotropy generation and to achieve MP with requisite properties for HPCF, conditions were further optimized (400–410 °C for 4–6 h). To ascertain the suitability, MP-15-405-5 exhibiting superior characteristics was transformed into pitch fibers, stabilized, and subsequently carbonized at 1000 °C to produce carbon fibers (CF). The resulting CF exhibited excellent mechanical properties with tensile strength and tensile modulus of 1.41 GPa and 156.25 GPa, respectively. The study suggests that PC acts as a dominant module in manufacturing high-quality spinnable MP and improves the yield of anisotropic content at relatively lower experimental conditions, making the process more efficient and cost-effective.

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Folic acid adsorption on pristine and oxygen-terminated boron nitride and silicon carbide nanoparticles: A DFT and MD simulation study

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials

Pub Date : 2025-03-03 DOI: 10.1016/j.diamond.2025.112171

Wael A. Mahdi , Adel Alhowyan , Ahmad J. Obaidullah

This study investigates the adsorption of folic acid (FA) onto pristine and oxygen-terminated boron nitride (BN) and silicon carbide (SiC) nanoparticles using density functional theory (DFT) and molecular dynamics (MD) simulations. Employing the Perdew-Burke-Ernzerhof functional with the D3 dispersion correction (PBED3) within a water solvent environment, we determined that FA adsorption is energetically favorable on both nitrogen-terminated BN (−0.92 eV) and oxygen-terminated SiC (−0.99 eV). This binding is driven by electrostatic interactions between the -NH and -OH groups of FA and the nitrogen and carbon atoms of the nanoparticles. Oxygen termination marginally enhanced the binding energy in both nanoparticle types. Thermodynamic analysis confirmed the adsorption process to be exothermic and spontaneous. MD simulations further revealed a hierarchy in FA interaction strength with BN nanoparticles: O > N > B, with O-terminated BN exhibiting the strongest interaction. This stronger interaction correlated with reduced FA mobility, indicating tight binding. Conversely, weaker interactions, particularly with boron-terminated BN, resulted in increased FA diffusion and higher mean square displacement (MSD). The adsorption of FA significantly altered the electronic and optical properties of both BN and SiC nanoparticles, with a termination-dependent effect. Specifically, FA adsorption substantially reduced the HOMO-LUMO gap, most notably in boron-terminated BN (76.83 % reduction) compared to oxygen-terminated SiC (72.94 % reduction), leading to increased conductivity. This enhanced conductivity, coupled with the low recovery times and improved dipole moments observed, suggests the potential utility of BN and SiC nanoparticles as biosensors for FA detection. The promising adsorption energies also highlight their potential application in drug delivery systems.

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