Diamond and Related Materials最新文献

{"title":"Electroluminescent Ag nanoparticles decorated carbon nanotubes–based device for room-temperature NH3 sensing application","authors":"Alisa Saengsonachai ,&nbsp;Wiwat Wongkokua ,&nbsp;Papichaya Chaisakul ,&nbsp;Teerakiat Kerdcharoen ,&nbsp;Margit Zacharias ,&nbsp;Chatchawal Wongchoosuk","doi":"10.1016/j.diamond.2026.113410","DOIUrl":"10.1016/j.diamond.2026.113410","url":null,"abstract":"<div><div>Alternating-current electroluminescence (AC-EL) technologies have recently emerged as promising platforms for multifunctional optoelectronic devices. However, their application in gas sensing remains limited. Herein, we report a dual-function AC-EL device incorporating a silver nanoparticles–decorated carbon nanotubes (AgNPs–CNTs) sensing layer that enables simultaneous light emission and room-temperature ammonia (NH₃) detection. The AgNPs–CNTs, consisting of CNTs with an average diameter of ∼16 nm uniformly decorated with AgNPs of ∼25 nm in diameter, significantly enhance charge transport and electric-field distribution, leading to a 1.6-fold increase in electroluminescent intensity after coating. Upon exposure to NH₃, the device exhibits a clear and reversible decrease in optical luminance. The AgNPs-CNTs based AC-EL device demonstrates linear concentration-dependent sensing over the range of 100–1000 ppm (R² = 0.997), high sensitivity (∼0.026 ppm⁻¹), rapid response–recovery behavior, excellent device-to-device reproducibility, and strong selectivity against common volatile organic compounds and humidity. The sensing mechanism of the AgNPs-CNTs based AC-EL device is proposed via electron donation from NH₃ to the p-type CNTs, modulation of the AgNPs/CNTs metal–semiconductor junctions, and subsequent suppression of excitation processes within the ZnS:Cu,Cl phosphor layer. The results demonstrate a simple, low-cost, and scalable strategy for developing optical gas sensors based on AC-EL architectures. This work establishes AC-EL devices as a promising platform for next-generation visual gas indicators and low-power optoelectronic sensing systems suitable for environmental monitoring, smart packaging, and wearable electronics.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113410"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185637","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}

{"title":"Citric acid and thiourea functionalized activated carbon for efficient removal of anionic and cationic dyes: A combined experimental and DFT approach","authors":"Hamza Megherbi ,&nbsp;Aghilas Brahmi ,&nbsp;Faïza Diaba ,&nbsp;Abdelbaki Reffas","doi":"10.1016/j.diamond.2026.113353","DOIUrl":"10.1016/j.diamond.2026.113353","url":null,"abstract":"<div><div>Activated carbon (AC) is known for its excellent adsorption, which can be improved by surface and inner modification. This study investigates three key points. First, the effect of phosphoric acid impregnation (30, 60, 100, and 150 wt%) on crystallinity, surface chemistry, thermal stability, and adsorption of Methylene blue (MB) and Orange G (OG). TGA, XRD, and FT-IR results showed that phosphoric acid enhanced thermal stability, decreased crystallinity, and increased surface functional groups. These structural and chemical changes led to significant increases in adsorption capacity, from 77.126 to 514.405 mg/g for MB at pH 10 and from 16.813 to 254.900 mg/g for OG at pH 2.</div><div>Second, the effect of surface and internal modifications using Citric acid (C-ACs) and Thiourea (T-ACs) on activated carbon, including its elemental composition and morphology, were investigated through FTIR, XPS, and SEM-EDS analyses. The successful introduction of new surface functionalities was confirmed by the emergence of thiocarbonyl (HN–C=S) groups after Thiourea modification and ester (O–C=O) groups following Citric acid treatment. After modification, the adsorption capacity of OG slightly decreased to 239.029 mg/g at pH 2, whereas MB adsorption capacity further increased, reaching 536.600 mg/g at pH 10.</div><div>Finally, Density Functional Theory (DFT) and Non-Covalent Interaction (NCI) analyses provided molecular-level insight into the adsorption mechanism, demonstrating that MB exhibits higher reactivity than OG due to its lower energy gap and stronger interactions with electron-rich surface sites. π–π stacking was identified as the dominant interaction, supported by electrostatic forces, hydrogen bonding, and van der Waals interactions.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113353"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036662","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}

{"title":"Investigating the ultimate PcV performance of diamond-modified silicon carbide seal rings in high-load, high-speed water environments","authors":"Chengye Yang ,&nbsp;Hui Song ,&nbsp;He Li ,&nbsp;Shihao Yang ,&nbsp;Yuanyuan Mu ,&nbsp;Wubo Chu ,&nbsp;Xinbiao Mao ,&nbsp;Nan Jiang ,&nbsp;Kazuhito Nishimura","doi":"10.1016/j.diamond.2026.113441","DOIUrl":"10.1016/j.diamond.2026.113441","url":null,"abstract":"<div><div>Premature failure of SiC seal rings, manifesting as leakage under high-load, high-speed operation, represents a critical barrier to achieving the ultra-high reliability and extended service life required by advanced sealing systems. To suppress wear-induced failure, this study deposits a conformal microcrystalline diamond (MCD) coating on the sealing-ring end face by hot-filament chemical vapour deposition (HFCVD). Furthermore, a systematic comparative investigation was conducted to elucidate the interfacial frictional behaviour of diamond-modified seal-ring couples relative to the SiC-SiC pairing. Comprehensive tribological assessment reveals that the MCD–MCD sealing couple attains the optimum overall performance when benchmarked against both the SiC–SiC and MCD–SiC configurations. Specifically, the SiC–SiC couple exhibited an ultimate P_cV limit of 4.17 MPa·m s⁻¹, a steady-state friction coefficient of 0.138, and a specific wear rate of 1.53 × 10⁻⁸ mm³ N⁻¹ m⁻¹. In contrast, the ultimate P_cV value of the MCD-SiC seal pair reaches 75.3580 MPa·m s⁻¹, alongside a friction coefficient of 0.013 and a wear rate of 1.22 × 10⁻⁸ mm³/(N·m). Notably, the ultimate P_cV value of the MCD-MCD seal pair reaches 84.2919 MPa·m s⁻¹, with a friction coefficient as low as 0.003 and a wear rate of 0.55 × 10⁻⁸ mm³/(N·m), which is significantly superior to those of the SiC-SiC and MCD-SiC counterparts. Further mechanistic analysis indicates that under high-load and high-rotational-speed conditions, the lubrication state at the frictional interface of the seal rings undergoes dynamic evolution, specifically a continuous transition from hydrodynamic lubrication through boundary lubrication to incipient dry sliding. Specifically, the SiC-SiC mating pair fails rapidly due to high interfacial adhesion; the MCD-SiC pair suffers from severe abrasive wear at the interface; in contrast, the MCD-MCD pair maintains high stability at the frictional interface, retaining low adhesion and minimal interfacial damage under the lubrication effect of the dual‑carbon low-friction interface. In this study, under water lubrication conditions, the MCD-MCD tribopair exhibits a significantly higher ultimate P_cV value than the data reported in previous studies. This work is the first to systematically elucidate the lubrication behaviour evolution and failure mechanisms of diamond-coated seal rings under high-load and high-speed water environments. These findings provide critical experimental evidence and theoretical support for the high-performance design of deep-sea mechanical seals.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113441"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185256","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}

{"title":"Rational design of Ag-CuFe2O4/rGO heterojunction nanocomposite for efficient organic azo-dye degradation and mechanistic pathways toward Environmental Remediation","authors":"Sorapong Pavasupree ,&nbsp;Paramasivam Shanmugam ,&nbsp;Ranjith Rajendran ,&nbsp;Lalitha Gnanasekaran ,&nbsp;Supakorn Boonyuen ,&nbsp;Thammasak Rojviroon ,&nbsp;Orawan Rojviroon","doi":"10.1016/j.diamond.2026.113386","DOIUrl":"10.1016/j.diamond.2026.113386","url":null,"abstract":"<div><div>The fashion industry today utilizes a wide variety of dyes, raising global concerns about their toxicity, carcinogenic properties, and potential for bioaccumulation. In light of these issues, researchers are increasingly focusing on a diverse range of photocatalysts for the effective remediation of dyes. In this research, the synthesis of Ag-CuFe₂O₄/rGO nanocomposites is achieved through a hydrothermal method followed by an ultrasonication method. Various analytical techniques were used to analyze the prepared samples, such as XRD, FTIR, SEM, EDS, elemental mapping, HRTEM, and UV–Vis analyses. Results indicated successful decoration of silver nanoparticles (Ag NPs) and CuFe₂O₄ on 2D reduced graphene oxide (rGO) nanosheets. The fabricated interfacial binary heterostructure demonstrated effective photocatalytic capabilities for the remedy of mixed dye pollutants when exposed to UV–visible light. Factors such as a broad range of light absorption, efficient charge separation, and swift charge transport enhanced the photocatalytic performance of these heterostructures. The optimized Ag-CuFe₂O₄/rGO nanocomposites achieved impressive degradation efficiencies of 96.27%, 97.27%, and 93.73% for Methylene blue (MB) and Rhodamine B, and MB and RhB mixed dyes, respectively. Additionally, the study explored the tentative photocatalytic mechanism, conducted scavenger experiments, and assessed the recyclability and stability of the nanocomposites. These findings highlighted that hydroxyl radical (^•OH) species significantly contribute to the photocatalytic degradation process under UV–visible light illumination. Overall, Ag-CuFe₂O₄/rGO nanocomposites demonstrate strong potential for efficiently degrading organic azo-dyes in industrial wastewater and promoting environmental cleanup.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113386"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185251","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}

{"title":"Exploring sulfate-driven enhancement pseudocapacitive: A new study on the structural, electrochemical, and kinetic properties of NiSO₄ quantum-dot-decorated g-C₃N₄ nanosheets","authors":"Nagih M. Shaalan ,&nbsp;Hany M. Abd El-Lateef ,&nbsp;Sajid A. Ansari ,&nbsp;Mohamad M. Ahmad ,&nbsp;Abdullah Aljaafari ,&nbsp;A.R. Altayar ,&nbsp;Shalendra Kumar ,&nbsp;Faheem Ahmad","doi":"10.1016/j.diamond.2026.113406","DOIUrl":"10.1016/j.diamond.2026.113406","url":null,"abstract":"<div><div>This work demonstrates, for the first time, NiSO₄ quantum dots uniformly attached to g-C₃N₄ nanosheets. It reveals sulfate-driven enhancement of Ni²⁺/Ni³⁺ redox pseudocapacitance in alkaline media, activating g-C₃N₄ via NiSO₄(1-x)@g-C₃N₄(x) (x = 1.0, 0.9, 0.5, 0.2) systematically tuning loading effects. XRD confirms the coexistence of anhydrous NiSO₄ and NiSO₄·6H₂O phases with average crystallite size between 7 and 11 nm. HRTEM verifies uniformly distributed NiSO₄ quantum dots with an average size of ∼7 nm (2–10 nm distribution), and XPS confirms Ni²⁺ oxysulfate species strongly bound to g-C₃N₄ with abundant accessible redox sites for Ni²⁺/Ni³⁺ ions. For the optimized nanostructures with <em>x</em> = 0.2 and 0.5, higher charge-storage capacitance is observed, with maximal specific capacitances of 503.8 F g⁻¹ at a scan rate of 2 mV s⁻¹ and 492.9 F g⁻¹ at a current density of 0.5 A g⁻¹. Trasatti and Randles-Sevcik analyses EIS reveals dominant pseudocapacitive contributions. Furthermore, full cell exhibits a capacitance of 39.4 F g⁻¹ at 0.25 A g⁻¹, establishing NiSO₄ quantum-dot decoration as the first sulfate-driven pseudocapacitance strategy for activating g-C₃N₄ and providing new mechanistic insight into <span><math><mi>S</mi><msubsup><mi>O</mi><mn>4</mn><mrow><mn>2</mn><mo>−</mo></mrow></msubsup></math></span>-enhanced Ni redox kinetics for high-performance supercapacitor applications. Post-cycling analyses reveal gradual <span><math><mi>S</mi><msubsup><mi>O</mi><mn>4</mn><mrow><mn>2</mn><mo>−</mo></mrow></msubsup></math></span>leaching from NiSO₄ QDs into the alkaline media, forming Ni-oxide/hydroxide phases while preserving Ni²⁺/Ni³⁺ redox activity, demonstrating sulfates as initial conductivity enhancers with stable Ni-phases sustaining long-term pseudocapacitance.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113406"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185370","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}

{"title":"A smart coating for Mg alloys based on mPDA/h-BN hybrids: Achieving self-healing via pH and light dual-responsive behaviour","authors":"Renfei Xu,&nbsp;Xiangjun Li,&nbsp;Miaomiao Li,&nbsp;Yinxia Dong,&nbsp;Libo Tong","doi":"10.1016/j.diamond.2026.113362","DOIUrl":"10.1016/j.diamond.2026.113362","url":null,"abstract":"<div><div>Despite the outstanding lightweight potential of Mg alloys, their poor corrosion resistance significantly limits their practical applications in engineering. As a more sustainable alternative to solvent-based resins, waterborne polyurethane (WPU) coatings offer notable environmental and safety benefits, including low VOC emissions, non-flammability, and ease of application. However, the inherent microporous defects formed during the curing process, coupled with the absence of self-healing capabilities, notably undermine their protective performance. In this study, a smart hybrid coating was developed to improve the corrosion protection of WPU on Mg alloys. The coating combines benzotriazole (BTA)-loaded mesoporous polydopamine (mPDA) microspheres and hydroxylated boron nitride (OH-BN) within the WPU matrix, achieving active-passive synergistic protection through dual pH/light responsiveness. The mPDA enhances OH-BN dispersion within the matrix and simultaneously acts as an intelligent carrier for the controlled release of BTA under acidic or light-irradiated conditions. Electrochemical impedance spectroscopy (EIS) showed that, after 6 h of immersion in NaCl solution (pH = 3), the damaged composite coating retained an impedance modulus of 2.37 × 10⁵ Ω·cm² at 0.1 Hz, and maintained a value of 1.97 × 10⁵ Ω·cm² under light irradiation-28 and 2.8 times higher, respectively, than pure WPU. These results confirm the coating's outstanding corrosion resistance and stimulus-responsive self-healing capability, which arise from the synergistic effects of the OH-BN barrier and BTA release under pH and light stimuli. This work presents a sustainable and intelligent corrosion protection strategy for Mg alloys in harsh environments.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113362"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185373","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}

{"title":"Synergistic hydrogen plasma etching and in situ oxidation of boron-doped diamond for enhanced electrochemical ozone production","authors":"Lipeng Zhao ,&nbsp;Yicheng Jiang ,&nbsp;Shengli Zhu ,&nbsp;Zhenduo Cui ,&nbsp;Zhaoyang Li ,&nbsp;Wence Xu ,&nbsp;Zhonghui Gao ,&nbsp;Meiqing Guo ,&nbsp;Yanqin Liang ,&nbsp;Hui Jiang","doi":"10.1016/j.diamond.2026.113382","DOIUrl":"10.1016/j.diamond.2026.113382","url":null,"abstract":"<div><div>Boron-doped diamond (BDD) electrodes have attracted considerable attention as promising candidates for electrochemical ozone production (EOP) in extreme and corrosive environments, due to their exceptional chemical and physical stability. However, the inherently low ozone generation efficiency has significantly hindered their widespread application in EOP processes. In this study, a hydrogen plasma etching strategy was developed to fabricate hydrogen-terminated BDD electrodes, which undergo in situ oxidation during the anodic reaction, thereby transforming the surface termination from hydrogen to oxygen. This surface-engineering approach markedly enhances the electrode's electrocatalytic activity for ozone generation. Experimental results demonstrated that, compared to the as-deposited BDD electrode, the sample etched for 1.5 h at a chamber temperature of 700 °C and a hydrogen flow rate of 300 sccm (labeled as BDD-H_1.5h) exhibited a significantly increased electrochemical active area (ECSA) and a decreased charge transfer resistance (Rct). As a result, the ozone production rate of the BDD-H_1.5h electrode was 2.66 times higher than that of the untreated BDD electrode, with a Faradaic efficiency (FE) of 17.23%. Theoretical calculations further revealed that the combination of appropriate hydrogen plasma etching and in situ oxidation leads to the enrichment of C-O-C and C-OH functional groups on the electrode surface. These surface species significantly enhance the adsorption of the OH^⁎ intermediate, which plays a pivotal role in the ozone oxidation pathway. Therefore, the BDD-H_1.5h electrode exhibits excellent performance in the electrocatalytic ozonation of the representative organic dye pollutant Acid Red 27 (AR 27). This highlights the great potential of modified BDD electrodes for efficient ozone generation and organic pollutant removal in water treatment applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113382"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185374","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}

{"title":"Enhanced electrochemical performance and internal resistance dynamics of Zn-MOF-74/rGO composite cathode for aqueous zinc-ion batteries","authors":"Abdulhadi H. Al-Marri","doi":"10.1016/j.diamond.2026.113380","DOIUrl":"10.1016/j.diamond.2026.113380","url":null,"abstract":"<div><div>The development of high-performance aqueous zinc-ion batteries (AZIBs) requires cathode materials capable of combining fast Zn²⁺ transport, high electronic conductivity, and long-term structural stability. In this work, we report a Zn-MOF-74/rGO composite synthesized through a facile in-situ hydrothermal route, in which reduced graphene oxide (rGO) forms a conductive and mechanically robust framework within the MOF matrix. Structural analyses confirm that the incorporation of rGO preserves the crystalline integrity of the MOF-74 framework while significantly improving its textural properties and thermal stability. The resulting hybrid exhibits a high specific surface area (≈950 m² g⁻¹) and a hierarchical porous network that facilitates rapid Zn²⁺ diffusion. Electrochemical measurements reveal a remarkable enhancement in charge-storage performance: the composite delivers 291 mAh g⁻¹, superior rate capability, and excellent cycling stability with 94% capacity retention after 1000 cycles at 2.0 A g⁻¹. Dynamic charge internal resistance (DCIR) analysis further demonstrates reduced polarization and improved interfacial kinetics, confirming the key role of rGO in lowering internal resistance under various operating conditions. The synergistic interplay between the MOF-74 framework and the rGO network enables fast electrochemical kinetics, enhanced electronic pathways, and robust structural durability. This study provides new insights into DCIR evolution in MOF-based electrodes and highlights a promising strategy for designing next-generation high-power AZIBs.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113380"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185442","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}

{"title":"Detection of Escherichia coli using GMR integrated with L-histidine-linked Fe3O4/rGO magnetic nanoparticles","authors":"Layyinatus Shifa ,&nbsp;Zurnansyah ,&nbsp;Emi Kurnia Sari ,&nbsp;Nurul Imani Istiqomah ,&nbsp;Mercuryta Dewi Noviastuti ,&nbsp;Nugraheni Puspita Rini ,&nbsp;Julia Angel ,&nbsp;Tri Marji Atmono ,&nbsp;Kohji Nakamura ,&nbsp;Edi Suharyadi","doi":"10.1016/j.diamond.2026.113376","DOIUrl":"10.1016/j.diamond.2026.113376","url":null,"abstract":"<div><div><em>Escherichia coli</em> (<em>E. coli</em>) has been successfully detected using a giant magnetoresistance (GMR) chip as a transducer, employed with Fe₃O₄ and Fe₃O₄/reduced graphene oxide (rGO) nanoparticles as magnetic nanotag labels and L-Histidine (L-His) as a linker. The <em>E. coli</em> concentration was varied to investigate how different levels of <em>E. coli</em> affect the voltage signal generated by the GMR sensor. The nanoparticles were fabricated through a hybrid approach that employs a green synthesis method using plant extracts. The nanoparticles exhibit superparamagnetic behavior, which influences the detection quality of the labels. The result shows that the higher <em>E. coli</em> concentration results in a more substantial increase in the voltage signal. For the Fe₃O₄/rGO-His label, the voltage is 0.075, 0.131, and 0.173 V for <em>E. coli</em> variations of 1:1000, 1:100, and 1:10, respectively. The signal for Fe₃O₄/rGO-His label is more significant than that of Fe₃O₄-His due to the contribution of rGO which increases the binding of L-His and <em>E. coli</em>. Moreover, the result of the relative standard deviation shows an increase from 0.26% to 6.1% for Fe₃O₄-His and from 0.69% to 5.1% for Fe₃O₄/rGO-His, indicating an acceptable level of reproducibility in the sensor's detection.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113376"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185443","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}

{"title":"Design and synthesis of a PtNPs@GQDs nanocomposites and its anticancer effects on colorectal cancer","authors":"HuiLong Xie ,&nbsp;YongQin Wei ,&nbsp;JiaNi Xiong ,&nbsp;ChengYan Wang ,&nbsp;GuoCong Guo ,&nbsp;JieMing Xie","doi":"10.1016/j.diamond.2026.113389","DOIUrl":"10.1016/j.diamond.2026.113389","url":null,"abstract":"<div><div>Platinum-based chemotherapy for colorectal cancer is limited by severe nephrotoxicity and drug resistance. To address this, we synthesized a novel platinum nanoparticle-graphene quantum dot nanostructure (PtNPs@GQDs), characterized by excellent water solubility, stability, and high catalytic/reductive activity. In vitro, PtNPs@GQDs demonstrated potent growth inhibition of colon cancer cells at low platinum concentrations (&lt;1.6 μg Pt/mL) and significantly induced apoptosis. In vivo, PtNPs@GQDs (8.2 and 12.4 mg Pt/kg) markedly suppressed tumor growth in HT-29 xenograft mice. These findings highlight PtNPs@GQDs as a promising new chemotherapeutic agent for colorectal cancer.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113389"},"PeriodicalIF":5.1,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185444","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}