{"title":"The preparation of hemoglobin based electrode on the basis of MOF-graphene oxide nano-complex and the investigation on its electro-catalytic effect on the reduction of H2O2","authors":"Bao Chen Han, Xue Qing Chu, Han Zeng","doi":"10.1016/j.jsamd.2025.100906","DOIUrl":"10.1016/j.jsamd.2025.100906","url":null,"abstract":"<div><div>The co-mixture of graphene oxide and metal-organic framework material is proposed to act as a bio-macromolecule supporter. Hemoglobin based-electrode is prepared via the conventional drip-casting method, and heme protein molecules are incorporated into the nano-complex. The role of oxygen-containing groups on graphene oxide in the mutual interactions between elements within nano-composite, as well as the integrated hemoglobin and its impact on enzyme-involved electro-catalysis, are the primary objectives of the current manuscript. The analysis in the experimental results manifests that the existence of oxygen-containing groups onto GO would contribute to the improvement in the orderliness of nano-complex with hemoglobin molecule and the formation of an amphiphilic micelle-like structure with a hydrophobic outer surface and hydrophilic core. The mutual interaction between graphene oxide and a metal-organic framework would alleviate the binding strength of hemoglobin with metal-organic framework to distort the aboriginal configuration of the heme site within the protein molecule. The synergistic effect of multiple interactions between metal-organic framework and graphene oxide with oxygen-containing groups leads to the disappearance of the electrochemical signal for the electro-active sites in graphene oxide. The interaction between elements of nano-complex would depress the electro-activity of redox sites in nano-composite, and the integrated heme protein could play the role of the primary electro-active species in nano-complex with protein accommodation. The existence of oxygen-containing groups on graphene oxide could slow down the charge transportation process via the mutual interaction between heme protein and graphene oxide to restrain the electro-catalytic efficiency.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100906"},"PeriodicalIF":6.7,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144148061","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}
Paulo Joaquim Nunes , Mariana Fernandes , Verónica de Zea Bermudez
{"title":"Novel thermotropic system with UV-blocking ability for dynamic radiative cooling and synchronous visible/NIR tuning of windows in buildings in hot climate regions","authors":"Paulo Joaquim Nunes , Mariana Fernandes , Verónica de Zea Bermudez","doi":"10.1016/j.jsamd.2025.100907","DOIUrl":"10.1016/j.jsamd.2025.100907","url":null,"abstract":"<div><div>Passive dynamic thermotropic (TT) radiative cooling (RC) windows aid net-zero energy buildings in smart cities by adjusting sunlight and solar heat in response to temperature variations, as they become opaque when temperatures rise, thereby using thermal radiation to dissipate heat into outer space. They are ideal for controlling solar heat gain and privacy. Here, we introduce a innovative eco-friendly TT layer with ultraviolet (UV)-shielding and RC ability composed of a sol-gel derived di-ureasil hybrid matrix doped with carbon dots (CDs) obtained from <em>Agapanthus africanus</em> leaves and variable contents of TT 1-butyl-3-methylimidazolium chloride ([BMIm]Cl) ionic liquid. The layers exhibit high transparency and thermal stability. The thermotropic devices (TTDs) assembled demonstrated, at the highest [BMIm]Cl concentration used, improved thermo-optical performance mediated by the surface plasmon resonance effect (SPRE), broad operational range (30–70 °C), and excellent cycling stability. Maximum transmittance variation (ΔT) values of 31/27 % at 555/1100 nm were achieved. This new class of TT layer represents a milestone in the development of smart RC materials for autonomous solar modulation windows.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100907"},"PeriodicalIF":6.7,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144123519","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}
Farhank Saber Braim , Nik Noor Ashikin Nik Ab Razak , Layla Qasim Ismael , Mohammed Ali Dheyab , Maher Talib Alshamkhani , Khoo Boon Yin , Azlan Abdul Aziz
{"title":"Efficient dual-imaging platform: Ultrasound-driven synthesis of bismuth–iron oxide nanocomposites","authors":"Farhank Saber Braim , Nik Noor Ashikin Nik Ab Razak , Layla Qasim Ismael , Mohammed Ali Dheyab , Maher Talib Alshamkhani , Khoo Boon Yin , Azlan Abdul Aziz","doi":"10.1016/j.jsamd.2025.100905","DOIUrl":"10.1016/j.jsamd.2025.100905","url":null,"abstract":"<div><div>Nanoparticle (NP)-based imaging probes exhibit significantly greater payload and longer blood circulation duration compared to small molecule contrast agents (CAs). Enhanced dual-modal imaging (MRI and CT) combines the great spatial resolution of magnetic resonance imaging (MRI) with the strong radiodensity of computed tomography (CT) to enable early and accurate illness diagnosis. Synthesized Bi–Fe<sub>3</sub>O<sub>4</sub> composite NPs are biocompatible and safe, crucial for <em>in vivo</em> clinical applications. The use of a rapid and straightforward, ultrasound-assisted synthesis process and green chemistry, specifically natural plant extract (<em>Sumac</em>) as a stabilizer, demonstrates a sustainable approach to nanomaterial development that minimizes environmental impact while maintaining high functional performance. The physicochemical properties of the Bi–Fe<sub>3</sub>O<sub>4</sub> were assessed using a range of typical analyses. The resulting composite NPs exhibited uniformity, crystallinity, semi-spherical shapes, and superparamagnetic properties, with an average size of 17.5 nm and a magnetization value of 92 emu/g. Furthermore, the research investigated the cytotoxicity, intracellular distribution, and cellular internalization of Bi–Fe<sub>3</sub>O<sub>4</sub> composite NPs using flow cytometry, the MTT assay, and Prussian blue staining. The findings indicated that the composite NPs were non-toxic, biocompatible, and dose-dependent under exposure conditions. The sensitivity, relaxivity, and attenuation characteristics of the colloid sample were evaluated for their potential dual-modal MRI/CT contrast enhancement using agarose gel-based phantoms. The Bi component exhibited an exceptionally high X-ray attenuation property of 399 HU, while the Fe<sub>3</sub>O<sub>4</sub> component showed remarkable magnetization (92 emu/g) and transverse relaxation (r<sub>2</sub> = 273 mM<sup>−1</sup> s<sup>−1</sup>) shortening capabilities.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100905"},"PeriodicalIF":6.7,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134734","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 bifunctional floral TiO2–TiB2 heterostructure buried interface on SnO2 for 23.5 % efficient n–i–p perovskite solar cells","authors":"Nouf Alharbi","doi":"10.1016/j.jsamd.2025.100899","DOIUrl":"10.1016/j.jsamd.2025.100899","url":null,"abstract":"<div><div>Interfacial energy mismatch and carrier recombination at the electron transport layer (ETL)/perovskite interface significantly limit the performance of perovskite solar cells (PSCs). We present a bifunctional dual-layer electron transport layer consisting of a floral TiO<sub>2</sub>–TiB<sub>2</sub> heterostructure integrated on SnO<sub>2</sub> to address these limitations. The TiO<sub>2</sub>–TiB<sub>2</sub> heterostructure, formed through the partial oxidation of hydrothermally produced TiB<sub>2</sub> nanoflakes, exhibits advantageous energy band alignment and provides a robust internal electric field at the buried interface, as confirmed by UPS, Mott–Schottky, and KPFM studies. This facilitates effective charge extraction, diminishes trap-assisted recombination, and improves perovskite crystallization while minimizing lattice strain. The optimized dual-layer ETL attains a power conversion efficiency (PCE) of 23.5 %, with a V<sub>OC</sub> of 1.201 V, J_SC of 24.5 mA cm<sup>−2</sup>, and a fill factor of 78.81 % in n–i–p structured perovskite solar cells utilizing α-FAPbI<sub>3</sub>. Improved charge carrier mobility and reduced trap density were validated by SCLC, TRPL, and EIS studies. The gadget demonstrates outstanding operational and environmental stability under heat, moisture, and prolonged light-stress conditions. This study presents a scalable approach for interfacial engineering of dual-layer electron transport layers to achieve extremely efficient and durable perovskite photovoltaics.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100899"},"PeriodicalIF":6.7,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143947759","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}
Dalal Abdullah Aloraini , Aljawhara Almuqrin , Badriah Albarzan , E.A. Abdel Wahab , Kh S. Shaaban
{"title":"Studying structural, mechanical, and radiation shielding properties for BaO–Li2B4O7–SiO2–MgO glasses","authors":"Dalal Abdullah Aloraini , Aljawhara Almuqrin , Badriah Albarzan , E.A. Abdel Wahab , Kh S. Shaaban","doi":"10.1016/j.jsamd.2025.100904","DOIUrl":"10.1016/j.jsamd.2025.100904","url":null,"abstract":"<div><div>This article investigates the impact of the inclusion of BaO on the structural, mechanical, and γ-ray shielding of the glass composition 77Li<sub>2</sub>B<sub>4</sub>O<sub>7</sub>–11SiO<sub>2</sub>-(12-x)MgO-xBaO (0 ≤ x ≤12 mol%). FT-IR confirms that the inclusion of BaO increases BO<sub>4</sub> and decreases BO<sub>3</sub>. The density increased from 2.89 for LBSMBa0 to 3.83 for LBSMBa12, while the molar volume decreased from 49.02 for LBSMBa0 to 40.53 for LBSMBa12. Both velocities were increased, (V<sub>L</sub>m/s) increased from 4634 for LBSMBa0 to 4890 for LBSMBa12, while (V<sub>T</sub> m/s) increased from 2165 for LBSMBa0 to 2318 for LBSMBa12. The elastic modulus values of LBSMBa glasses were increased. Phy-x code confirms the positive impacts of BaO on the <span><math><mrow><mi>γ</mi></mrow></math></span> shielding efficiency. The MAC values of LBSMBa glasses have the trend: LBSMBa12> LBSMBa9 > LBSMBa3 > LBSMBa1.5 > LBSMBa0. Thus, the LBSMBa12 sample can be used in shielding applications more than the other samples.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100904"},"PeriodicalIF":6.7,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090027","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}
Hamed Dehdashti Jahromi , Nabil Zeiri , Ahmad Lotfiani
{"title":"CMOS-integrated UV phototransistor utilizing a novel p-GaAs/p-Si staggered heterojunction","authors":"Hamed Dehdashti Jahromi , Nabil Zeiri , Ahmad Lotfiani","doi":"10.1016/j.jsamd.2025.100891","DOIUrl":"10.1016/j.jsamd.2025.100891","url":null,"abstract":"<div><div>This paper introduces a high-performance, CMOS-compatible ultraviolet (UV) phototransistor utilizing a novel staggered heterojunction between p-type Gallium Arsenide (GaAs) and p-type Silicon (Si). This innovative device design overcomes limitations in traditional silicon-based UV photodetectors by employing a p-GaAs light-absorbing channel, enabling efficient photon-to-current conversion. The device, operating in the subthreshold regime, demonstrates exceptional performance characteristics, including a high responsivity of 138 <span><math><mrow><mi>m</mi><mi>A</mi><mo>/</mo><mi>W</mi></mrow></math></span> at 3 <span><math><mi>V</mi></math></span> bias, a linear dynamic range of 220 <span><math><mrow><mi>d</mi><mi>B</mi><mi>m</mi></mrow></math></span>, near-zero dark current, and a remarkable photo-to-dark current ratio on the order of <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>11</mn></mrow></msup></mrow></math></span>. These findings highlight the potential of the presented heterostructure approach for achieving high-sensitivity and low-noise UV detection, with a clear path towards seamless integration into existing electronic circuits and advanced sensing applications.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100891"},"PeriodicalIF":6.7,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143947758","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 magnetic properties and densification of SrFe12O19/Fe3O4 hard/soft composites via cold sintering process","authors":"Nuchjaree Salidkul , Prasit Thongbai , Supree Pinitsoontorn","doi":"10.1016/j.jsamd.2025.100900","DOIUrl":"10.1016/j.jsamd.2025.100900","url":null,"abstract":"<div><div>Magnetic ferrite composites are widely used in high-frequency applications due to their unique combination of magnetic and electrical properties. In this study, SrFe<sub>12</sub>O<sub>19</sub>/Fe<sub>3</sub>O<sub>4</sub> (SFO/FO) hard/soft composite ceramics were synthesized using the cold sintering process (CSP) and characterized to evaluate their structural, magnetic and electrical performance. X-ray diffraction confirmed the coexistence of SFO and FO phases, while magnetic measurements revealed hybrid behavior combining hard and soft magnetic characteristics. The addition of FO phase improved particle dispersion and compaction, as reflected in the enhanced relative density (90–92 %) and Vicker hardness (3.0–3.7 GPa). Annealing changed the phase of Fe<sub>3</sub>O<sub>4</sub> to α-Fe<sub>2</sub>O<sub>3</sub> and reduced the pores, which made the composite materials more compact. These effects resulted in improved coercivity (∼4 kOe), remanence, and squareness ratio (∼0.5), with an optimized energy product (BH<sub>max</sub>) of 0.80 MGOe observed for the 5 %FO composite. Electrical analysis showed an increase in AC conductivity with higher FO content, while annealing reduced conductivity to ∼10<sup>-7</sup> S/cm at 1 kHz, ensuring sufficiently high impedance suitable for high-frequency applications. The successful synthesis of these composites via CSP at low temperatures demonstrates its feasibility as a method for investigating phase formation and magnetic interactions in ceramic nanocomposites.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 2","pages":"Article 100900"},"PeriodicalIF":6.7,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917541","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":"ZnO/CuO nanocomposites for enhanced photocatalytic and antibacterial applications: A comparative study of synthesis methods","authors":"Solomon Bekele Endeshaw , Mahendra Goddati , Jaebeom Lee , Fekadu Gochole Aga , Lemma Teshome Tufa , Fedlu Kedir Sabir","doi":"10.1016/j.jsamd.2025.100898","DOIUrl":"10.1016/j.jsamd.2025.100898","url":null,"abstract":"<div><div>ZnO/CuO nanocomposites (NCs) were prepared through a biological route using <em>Vernonia amygdalina</em> leaf extract as a stabilizing and reducing agent. ZnO nanoparticles (NPs) and ZnO/CuO NCs were also fabricated <em>via</em> the chemical precipitation method for comparison purposes. Spectroscopic, microscopic, electrochemical and XRD techniques were employed to characterize the prepared samples. In addition, first-principles calculations based on density functional theory (DFT) were utilized to elucidate the electronic characteristics of the individual ZnO and CuO NPs. The X-ray diffraction (XRD) results affirmed the purity and crystalline features of the fabricated NPs and NCs. Morphological analyses demonstrated that the particles of green-mediated ZnO/CuO NCs are smaller and less agglomerated than those of NCs synthesized without the extract. A comparison of photocatalytic and antibacterial performances of ZnO/CuO NCs synthesized with and without plant extract was also conducted. Compared to chemically synthesized NCs, the green-mediated NCs exhibited superior visible light photocatalytic performance for the decomposition of methylene blue (MB) dye. In particular, the degradation of MB over the optimized green-mediated NCs reached 98.80 % within 80 min of photocatalysis, and the degradation rate was achieved as 0.0528 ± 0.00813 min<sup>−1</sup>. The enhancement might result from the reduced particle size and thereby the enhanced surface area of the green-mediated NCs. In addition, the anti-bactericidal effects of the green-mediated ZnO/CuO NCs against two Gram-negative and two Gram-positive bacteria were significantly higher than those of chemically prepared NC samples. The highest inhibitory zone was observed as 19.0 ± 0.37 mm against <em>E.</em> <em>coli</em> in the presence of the optimized green-mediated NCs. Thus, the biosynthesized ZnO/CuO NCs can be a potential candidate for practical and sustainable antibacterial and photocatalytic applications.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100898"},"PeriodicalIF":6.7,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069954","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}
Nurrahmi Handayani , Asnan Rinovian , Muhammad Rafli Habibillah , Monna Rozana , Diana Vanda Wellia , Isa Anshori , Muhammad Ali Zulfikar , Muhamad Nasir
{"title":"Electrospun recycled nylon/titanium dioxide nanofiber composite for photocatalytic degradation of methylene blue","authors":"Nurrahmi Handayani , Asnan Rinovian , Muhammad Rafli Habibillah , Monna Rozana , Diana Vanda Wellia , Isa Anshori , Muhammad Ali Zulfikar , Muhamad Nasir","doi":"10.1016/j.jsamd.2025.100901","DOIUrl":"10.1016/j.jsamd.2025.100901","url":null,"abstract":"<div><div>Recycling discarded fishing nets into high-performance nanomaterials offers a sustainable solution to plastic waste and environmental pollution. In this study, recycled nylon (r-nylon) from waste fishing nets was combined with TiO<sub>2</sub> nanoparticles to fabricate nanofiber composites via electrospinning. Optimized parameters included a flow rate of 0.2 mL/h, a voltage of 23 kV, and a 15 cm nozzle-to-collector distance. The nanofibers had diameters ranging from 200 to 250 nm and exhibited enhanced hydrophilicity, as indicated by contact angle values decreasing from 53.4° (pure nylon) to 39.6° (TiO<sub>2</sub>-reinforced composite). Mechanical tests showed an increase in tensile strength from 0.169 MPa (r-nylon only) to 0.856 MPa (with 0.6 % TiO<sub>2</sub>), highlighting the reinforcing effect of TiO<sub>2</sub>. Photocatalytic activity was evaluated using methylene blue (MB) under UV light, achieving degradation efficiencies of 88.68 % at pH 7 and 88.25 % at pH 9, significantly higher than 67.84 % obtained using pristine TiO<sub>2</sub> nanoparticles. The degradation followed pseudo-first-order and pseudo-second-order kinetics, depending on pH. This work highlights an innovative route to repurpose marine plastic waste into valuable nanomaterials for environmental applications, offering both performance enhancement and sustainability advantages over conventional polymer-TiO<sub>2</sub> systems.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100901"},"PeriodicalIF":6.7,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143947761","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}
Zheng-Yan Lei , Nguyen Van Toan , Masaya Toda , Ioana Voiculescu , Takahito Ono
{"title":"Electrocatalytic carbon dioxide reduction microchanneled with nanostructured electrodes","authors":"Zheng-Yan Lei , Nguyen Van Toan , Masaya Toda , Ioana Voiculescu , Takahito Ono","doi":"10.1016/j.jsamd.2025.100897","DOIUrl":"10.1016/j.jsamd.2025.100897","url":null,"abstract":"<div><div>The electrocatalytic reduction of carbon dioxide (CO<sub>2</sub>) is a promising solution for the utilization of renewable energy. Conversion to other useful substances is expected to diversify the applications of CO<sub>2</sub> and alleviate the environmental problems caused by the continuous increase in its concentration in the atmosphere. Herein, an electrochemical reduction microdevice was developed to increase the reduction current density and explore the possibility of the highly efficient electrochemical reduction of CO<sub>2</sub> to produce methane (CH<sub>4</sub>). A serpentine microchannel composed of an interdigitated Cu cathode and a Pt anode was filled with an electrolyte, and CO<sub>2</sub> gas was flowed through it to attempt CO<sub>2</sub> reduction. To increase the electrocatalytic reaction activity, the base of the electrodes was made of porous Si prepared through metal-assisted chemical etching. This configuration reduced the distance between the anode and cathode and increased the current density. The average Faraday efficiency reached 40 % at an applied potential of −4.2 V versus reversible hydrogen electrode (vs. RHE), with a current density of 316 mA/cm<sup>2</sup> at a temperature of 20 °C. The unique configuration of the microdevice with the interdigitated porous electrodes ensured a high current density and showed a high CO<sub>2</sub> reduction efficiency.</div></div>","PeriodicalId":17219,"journal":{"name":"Journal of Science: Advanced Materials and Devices","volume":"10 3","pages":"Article 100897"},"PeriodicalIF":6.7,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143947762","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}