Diamond and Related Materials最新文献

{"title":"Electrochemically synthesize hybrid composite of functionalized multi-walled carbon nanotubes and poly(3-hexylthiophene)/copper nanoparticles for sensitive D-xylose detection","authors":"Dounia Smani ,&nbsp;Naima Maouche ,&nbsp;Amine Kherfi","doi":"10.1016/j.diamond.2026.113317","DOIUrl":"10.1016/j.diamond.2026.113317","url":null,"abstract":"<div><div>This study aims to develop a novel composite material comprising poly(3-hexylthiophene) (P3HT) and multi-walled carbon nanotubes (MWCNTs) decorated with copper nanoparticles (CuNPs; 2.5 g/L) as an electrochemical sensor for the accurate and practical detection of D-xylose. D-xylose is an aldopentose sugar commonly used as a diagnostic marker in intestinal absorption tests, where its concentration in blood or urine reflects small-bowel function and malabsorption disorders. Accurate D-xylose determination is also important for monitoring sugar composition in food and pharmaceutical products and for controlling bioprocesses that convert lignocellulosic biomass into value-added chemicals and biofuels. However, many existing methods for D-xylose analysis, such as chromatographic and spectroscopic techniques, require expensive instrumentation, complex sample preparation, or are not easily adaptable to rapid on-site measurements. Developing a simple, sensitive, and reliable electrochemical sensor for D-xylose can therefore provide a valuable tool for clinical diagnostics, food analysis, and bioenergy applications.</div><div>Cyclic voltammetry (CV) was employed as an electrochemical method to synthesize the P3HT/<em>f</em>-MWCNT/CuNPs composite materials in an organic acetonitrile medium (CH₃CN) on platinum disk electrode. Cyclic voltammetry, square wave voltammetry (SWV) and electrochemical impedance spectroscopy (EIS) were subsequently used to investigate the electrochemical behavior of the resulting composite. All electrochemical parameters affecting D-xylose detection was examined, including thickness, scan rate, and pH. The P3HT/<em>f-</em>MWCNT/CuNPs composite demonstrated favorable performance with enhanced D-xylose oxidation currents. With a regression coefficient R2 of 0.9975, the composites showed a linear response in the concentration range of 1 × 10⁻⁹ to 3 × 10⁻⁷ M and a low detection limit of 2 × 10⁻¹³ M.</div><div>The prepared sensor exhibited excellent performance, which was attributed to the synergistic combination of the polymer structure, the enlarged surface area provided by MWCNTs and the uniform dispersion of copper nanoparticles. The proposed sensor can serve as a foundational electroanalytical tool in critical domains such as food safety regulation, pharmacology, and medical diagnostics.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"162 ","pages":"Article 113317"},"PeriodicalIF":5.1,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973425","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 MXene/ZnO heterostructure for sustainable environmental remediation and energy storage","authors":"Özlem Tuna ,&nbsp;Nurseli Görener Erdem ,&nbsp;Nergiz Kanmaz ,&nbsp;Hatice Hande Mert ,&nbsp;Mehmet Selçuk Mert ,&nbsp;Esra Bilgin Simsek","doi":"10.1016/j.diamond.2026.113319","DOIUrl":"10.1016/j.diamond.2026.113319","url":null,"abstract":"<div><div>Driven by their inherent synergistic effects, multifunctional composite materials have gained significant attention due to their ability to simultaneously address challenges in wastewater remediation and energy storage. In this study, Ti₃C₂/ZnO heterostructure was synthesized that exhibited considerable performance in both photocatalysis and thermal energy storage. The as-synthesized heterojunction showed unique structural characteristics, namely a highly porous structure, and a large specific surface area. The synergistic effect of Ti₃C₂ and ZnO contributed to remarkable physicochemical properties, including high visible light absorption, enhanced separation of photo-generated carrier and modulated band gap that aligned well with <em>Z</em>-scheme mechanism. The features enabled to a 95.2% decomposition of levofloxacin over TiC (3)@ZnO under visible light irradiation, mainly driven by super oxide radicals with additional contributions from hydroxyl radicals and photo-induced holes. Furthermore, integration of the phase change material n-octadecane (OD) into the heterostructure resulted in outstanding thermal energy performance with the OD/TiC (3)@ZnO composite exhibiting 15.85 times higher thermal conductivity compared to OD. Overall, this work provides valuable insights into the development of multifunctional MXene/ZnO-based heterostructures, addressing the challenges of wastewater treatment and sustainable energy storage.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"163 ","pages":"Article 113319"},"PeriodicalIF":5.1,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146001763","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":"Efficient adsorption of palladium from HLLW using a reusable thiourea-derived graphitic carbon nitride","authors":"Akash B V ,&nbsp;Ilaiyaraja Perumal","doi":"10.1016/j.diamond.2026.113316","DOIUrl":"10.1016/j.diamond.2026.113316","url":null,"abstract":"<div><div>Palladium, a valuable platinum group metal with diverse industrial applications, faces a supply shortage due to limited natural sources, prompting the exploration of secondary sources like high-level liquid waste (HLLW), which contains about 165 mg/L of Palladium. In this study, graphitic carbon nitride synthesized from a thiourea precursor, referred to as thiourea-graphitic carbon nitride (TUGCN), was characterized using FTIR, XRD, XPS, SEM, and BET techniques to confirm its structure and surface properties. Batch adsorption experiments demonstrated that TUGCN exhibits a high affinity for Pd(II), achieving a maximum adsorption capacity of 83.4 ± 5.8 mg g⁻¹ under optimized conditions (pH 3, 3-h equilibration). The adsorption followed Langmuir monolayer behavior and a pseudo-second-order kinetic model (R² = 0.999), with thermodynamic analysis revealing an exothermic process (ΔH° = − 4.62 kJ mol⁻¹). Effective Pd(II) desorption (≈75%) was achieved using 1 M thiourea, and the average selectivity factor of ~3.4 over competing ions highlights its potential for selective recovery. Overall, TUGCN emerges as a highly efficient, selective, and reusable adsorbent for Pd(II) recovery from HLLW.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"162 ","pages":"Article 113316"},"PeriodicalIF":5.1,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973422","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":"One-pot microwave-derived copper-doped red-emissive carbon dots with multienzyme activities for synergistic CDT/PDT enhancement via glutathione depletion","authors":"Shan Huang,&nbsp;Guixin Li,&nbsp;Wei Ni,&nbsp;Yutong Zhao,&nbsp;Shiqin Zhang,&nbsp;Yi Fang,&nbsp;Fuxiang Wei,&nbsp;Qi Xiao","doi":"10.1016/j.diamond.2026.113312","DOIUrl":"10.1016/j.diamond.2026.113312","url":null,"abstract":"<div><div>Cancer remains a leading cause of global mortality, with nearly 10 million annual deaths. High intracellular glutathione (GSH) levels and tumor hypoxia critically limit chemotherapy efficacy and photodynamic therapy (PDT) effectiveness. Conventional nanocatalytic materials, particularly blue/green-emitting nanomaterials, face limited deep-tissue penetration, hindering their utility in bioimaging and targeted therapy. Herein, we report a microwave-assisted one-pot synthesis of copper-doped red-emissive carbon dots (Cu-CDs) using dicyandiamide, 4′-aminoacetanilide, and anhydrous copper sulfate as precursors. The synthesized Cu-CDs exhibit excellent optical properties (<em>λ</em>_ex/<em>λ</em>_em = 525/595 nm) with a quantum yield of 12.7%, enabling nuclear fluorescent imaging for precise tumor localization. Notably, Cu-CDs demonstrate triple-enzyme (peroxidase, catalase, oxidase) mimetic activities, which synergistically deplete GSH, alleviate tumor hypoxia, and enhance reactive oxygen species (ROS) generation. In vitro studies revealed that Cu-CDs-mediated chemodynamic therapy (CDT) alone achieved 60.4% tumor cell apoptosis, while combination with PDT elevated the rate to 92.96%. Mechanistically, Cu-CDs exploit endogenous H₂O₂ overexpression in tumors to produce cytotoxic ‧OH radicals via peroxidase activity, while catalase activity mitigates hypoxia by decomposing H₂O₂ into O₂. This multi-enzyme synergy reduces ROS scavenging by GSH, amplifying PDT efficacy. Biocompatibility assessments confirmed low cytotoxicity and efficient cellular uptake of Cu-CDs. The red-emissive feature enables deep-tissue penetration and nuclear targeting, minimizing off-target damage. This work establishes a paradigm for metal-doped CDs in cancer theranostics, overcoming single-enzyme limitations and advancing synergistic enzyme-mimetic therapy. The strategy holds significant promise for biomedical applications, offering a novel platform for precision tumor treatment.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"162 ","pages":"Article 113312"},"PeriodicalIF":5.1,"publicationDate":"2026-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973949","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":"Hierarchically structured PAN/g-C₃N₄/ZnO hybrid nanofibers for photocatalytic degradation of hazardous ionic dyes","authors":"Aruna M. Sudapalli ,&nbsp;Supriya Tripathy ,&nbsp;Navinchandra Shimpi","doi":"10.1016/j.diamond.2026.113309","DOIUrl":"10.1016/j.diamond.2026.113309","url":null,"abstract":"<div><div>Nanofibers of PAN, PAN/g-C₃N₄, and PAN/g-C₃N₄/ZnO were fabricated by electrospinning. Simultaneously, the thermal breakdown method was used to synthesize g-C₃N₄ nanoflakes and ZnO nanoflowers via a wet-chemical process. The use of dispersed PAN/g-C₃N₄/ZnO hybrid nanofibers enabled overcoming the difficulty of reusing powder catalysts. Using wide-angle powder X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FTIR), UV–Vis spectrophotometry (UV–Vis), Thermogravimetric analysis (TGA), N₂ adsorption-desorption isotherms (BET) and X-ray photoelectron spectrometer (XPS) were characterized by as-synthesized ZnO nanoflowers, g-C₃N₄ nanoflakes, PAN, PAN/g-C₃N₄, and PAN/g-C₃N₄/ZnO NFs. According to morphological studies, for the first time, novel morphologies were achieved in PAN/g-C₃N₄/ZnO nanofibers, in which g-C₃N₄ nanoflakes are uniformly decorated over PAN fibers with a greater specific surface area and smaller band gap, and ZnO nanoflowers are decorated within PAN/g-C₃N₄ nanofibers, demonstrating the most remarkable homogeneity in dispersion. Under solar light irradiation, PAN (68%), ZnO nanoflowers (72%), g-C₃N₄ (81%)_, PAN/g-C₃N₄ nanofibers (91%), and PAN/g-C₃N₄/ZnO (99%) showed excellent photocatalytic performances for the degradation of Trypan blue (TB) in 110 min with 99% degradation. Similarly, PAN (70%), ZnO NFs (84%), g-C₃N₄ (92%)_, PAN/g-C₃N₄ nanofibers (97%), and PAN/g-C₃N₄/ZnO (99.5%) showed photocatalytic performance for the degradation of Methyl orange (MO) in 90 min, achieving 99.5% degradation. This effective degradation was due to a shift in the band gap, with higher porosity in PAN/g-C₃N₄/ZnO NFs than in pure PAN or g-C₃N_4.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"162 ","pages":"Article 113309"},"PeriodicalIF":5.1,"publicationDate":"2026-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973950","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":"Camellia oleifera shell–derived hard carbon materials for use in high-stability sodium-ion batteries","authors":"Tao Liu ,&nbsp;Fei Zhou ,&nbsp;Wenhao Chen ,&nbsp;Bolun Li ,&nbsp;Hong Yi ,&nbsp;Juan Liu ,&nbsp;Xiaocheng Li ,&nbsp;Xintai Su","doi":"10.1016/j.diamond.2026.113308","DOIUrl":"10.1016/j.diamond.2026.113308","url":null,"abstract":"<div><div>Economically viable and environmentally benign hard carbon (HC) anodes are pivotal for advancing sodium-ion batteries (SIBs). This study presents a single-step, additive-free carbonization strategy for synthesising HCs with precisely modulated closed-pore structures and graded graphitisation from <em>Camellia oleifera</em> shells (COSs). Through comprehensive electrochemical characterisation, we elucidate the intrinsic structure–property relations between the microstructural evolution and sodium storage performance of the synthesised HCs. Under an optimised carbonization temperature (1400 °C) and simplified single-step processing, the resulting HC anode exhibits exceptional cycling stability and rate capability, retaining 90% of its capacity after 5200 cycles at a high current density of 2000 mA g⁻¹. Cyclic voltammetry, electrochemical impedance spectroscopy and the galvanostatic intermittent titration technique confirm that in the HCs, sodium storage primarily occurs through surface adsorption, intercalation and pore filling. Further, density functional theory calculations reveal that an increase in the interlayer spacing and the introduction of C<img>O functional groups enhance the sodium storage capacity. Overall, this research offers an effective route for the value-added recycling of waste biomass and underscores the strong commercialisation potential of the developed high-performance HC anodes for use in high-capacity SIBs.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"162 ","pages":"Article 113308"},"PeriodicalIF":5.1,"publicationDate":"2026-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973948","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":"Investigation of N-polar GaN-diamond heterogeneous integration enabled by in-situ sputtered aluminum nitride interlayer","authors":"Ye Tian ,&nbsp;Lishu Wu ,&nbsp;Guoliang Ma ,&nbsp;Yu Zhou ,&nbsp;Fengwen Mu ,&nbsp;Yu Chen ,&nbsp;Sen Huang ,&nbsp;Ke Wei ,&nbsp;Peng Xu ,&nbsp;Chao Yuan ,&nbsp;Qian Li ,&nbsp;Xinhua Wang ,&nbsp;Qian Sun ,&nbsp;Xinyu Liu","doi":"10.1016/j.diamond.2026.113310","DOIUrl":"10.1016/j.diamond.2026.113310","url":null,"abstract":"<div><div>Efficient heat dissipation and low radio frequency (RF) loss are important to achieve high device performance of the N-polar gallium nitride (GaN)-based high electron mobility transistors (HEMTs). Enormous efforts have been made to transfer a GaN device layer onto a diamond substrate for enhancement of thermal conductivity, but achieving remains challenging. In this work, N-Polar GaN-diamond bonded epilayer are prepared via modified surface activated bonding (mSAB) at room temperature with in-situ sputtered amorphous aluminum nitride (AlN) and silicon interlayers. Thermal boundary resistance (TBR), radio frequency (RF) loss and thermal stress were evaluated. The results show that using AlN intermediate layer, N-Polar GaN/Diamond material achieves a lower thermal boundary resistance (31 m²K/G·W) and reduced RF loss (0.32 dB/mm@40 GHz) compared to existed research. This is the first report on the impact of bonding interlayer materials on the RF loss of GaN/Diamond bonding composite structure. Meanwhile, the N-Polar GaN-on-Diamond structure can withstand high temperatures and corresponding thermal stresses. Using AlN as the bonding interlayer, a diamond-based N-polar GaN heterojunction structure with the highest carrier mobility to date (2144 cm²/V·s) has been obtained. These findings highlight the potential of this method as a robust and efficient strategy for developing high-performance N-polar GaN-based millimeter-wave devices.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"162 ","pages":"Article 113310"},"PeriodicalIF":5.1,"publicationDate":"2026-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973951","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":"Terahertz array T-shaped patch antenna with metamaterials for 6G and biomedical applications","authors":"Siraj Younes ,&nbsp;Khardioui Youssef ,&nbsp;Foshi Jaouad ,&nbsp;Saidi Alaoui Kaoutar","doi":"10.1016/j.diamond.2026.113299","DOIUrl":"10.1016/j.diamond.2026.113299","url":null,"abstract":"<div><div>In order to enhance the performance of traditional patch antennas, this paper presents two novel techniques. The first is the use of an array antenna composed of four T-shaped radiating elements<strong>,</strong> where the T-shaped geometry is intentionally designed to improve current distribution, enhance radiation efficiency, and minimize impedance mismatch compared to a conventional rectangular patch<strong>.</strong> The second is the integration of a metamaterials (MTM) layer composed of periodically arranged unit-cell structures<strong>,</strong> whose engineered unit-cell shape enables stronger electromagnetic coupling and improved resonant behavior<strong>,</strong> which further enhances the antenna's characteristics. The suggested array antenna, with a size of 100 × 90 μm², is designed on a polyimide substrate and resonates at a center frequency of 3.77 THz. After a detailed comparison between the results of the single-patch and array configurations, we conclude the clear advantages of the T-shaped array structure, especially in terms of gain and impedance matching. The designed array achieves an S₁₁ of −44.14 dB, a VSWR of 1.02, a gain of 5.65 dB, and a directivity of 6.74 dB, which makes it suitable for both biomedical and 6G communication systems. When the MTM layer is integrated beneath the array, the antenna's performance improves even further, reaching an S₁₁ of −58.37 dB, a gain of 6.21 dB, and a directivity of 7.23 dB. In addition to its electromagnetic performance, a comprehensive safety evaluation was conducted to assess human exposure. The maximum SAR values are 0.78 W/kg for 1 g and 1.08 W/kg for 10 g, which remain well below the internationally accepted safety thresholds. These results confirm that the proposed array can operate safely in biomedical environments while offering enhanced THz performance. All the obtained results confirm that combining the T-shaped array geometry with the engineered MTM unit-cell design results in a high-performance patch antenna suitable for various applications including 6G and biomedical technologies.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"162 ","pages":"Article 113299"},"PeriodicalIF":5.1,"publicationDate":"2026-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973207","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":"Nitrogen-doped carbon nanotubes supported ultrafine Bi2O3 nanoparticles for efficient CO2 electroreduction to liquid fuel","authors":"Zixuan Zhang ,&nbsp;Ran Xing ,&nbsp;Zhengli Hu ,&nbsp;Dan Wu ,&nbsp;Zailai Xie ,&nbsp;Changsheng Cao ,&nbsp;Fangfang Yang","doi":"10.1016/j.diamond.2026.113301","DOIUrl":"10.1016/j.diamond.2026.113301","url":null,"abstract":"<div><div>Electrochemical conversion of CO₂ into high-value-added chemicals and fuels is of great significance for mitigating the greenhouse effect and achieving carbon neutrality. However, the bottleneck in realizing this blueprint lies in the development of highly active and selective electrocatalysts. Herein, a novel N-doped carbon nanotube (NCNTs)-supported ultrafine Bi₂O₃ nanoparticle composite (Bi₂O₃/NCNTs) was prepared, which exhibited excellent electrocatalytic performance toward the CO₂-to-formate conversion in a potential window exceeding 400 mV, with high current density and Faradaic efficiency (&gt;90 %), as well as outstanding long-term stability. Experimental results and theoretical calculations confirmed that N-doping in the NCNTs support significantly enhanced electron transfer at the interface of Bi₂O₃/NCNTs, which not only promoted the activation of CO₂, but also improved the adsorption of the key *OCHO intermediate on the catalyst surface, thereby improving product selectivity. This study provides valuable insights into designing efficient and cost-effective electrocatalysts for CO₂ electroreduction.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"162 ","pages":"Article 113301"},"PeriodicalIF":5.1,"publicationDate":"2026-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973268","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":"Dual sensing approach for ethanol detection utilizing diamond-coated QCM with ink-jet printed IDT electrodes","authors":"Michal Kočí ,&nbsp;Václav Procházka ,&nbsp;Ondrej Szabó ,&nbsp;Pavel Kulha ,&nbsp;Alexander Kromka ,&nbsp;Miroslav Husák","doi":"10.1016/j.diamond.2026.113307","DOIUrl":"10.1016/j.diamond.2026.113307","url":null,"abstract":"<div><div>Monitoring environmental gases requires sensing technologies that provide reliable and selective detection. In this study, we present a hybrid gas sensor that integrates a quartz crystal microbalance (QCM) with a conductive interdigital transducer (IDT). The active sensing layer is composed of hydrogen-terminated nanocrystalline diamond (H-NCD), a wide-bandgap material known to exhibit surface-induced p-type conductivity in the form of a two-dimensional hole gas (2DHG). This subsurface conductive layer is sensitive to adsorbed oxidizing or reducing gas species through charge transfer interactions at the H-terminated surface. To fabricate the device, the QCM was first coated with a thin H-NCD layer (dia-QCM), after which an IDT structure was deposited onto the surface via ink-jet printing using silver ink. The chemical properties of the H-NCD surface facilitated good ink adhesion and pattern definition during the printing process. The resulting device enables dual-mode sensing. The QCM component detects mass variations arising from adsorbed molecules, while the IDT monitors changes in conductivity associated with modulation of the 2DHG during gas exposure. This combination allows the two transduction mechanisms to operate in parallel, providing complementary information about gas–surface interactions and offering potential improvements in sensitivity and selectivity compared to single-mode sensors.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"162 ","pages":"Article 113307"},"PeriodicalIF":5.1,"publicationDate":"2026-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973947","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}