Nanoscale Advances最新文献

{"title":"g-C₃N₄ with a sustainable biomass-derived zinc vanadate hybrid supported on an industrial polyurethane sponge for methanol oxidation fuel cells and integrated with ML prediction models.","authors":"Omnia M Salem, Ahmed Abdel Khalek, Fatma Mohamed","doi":"10.1039/d6na00358c","DOIUrl":"https://doi.org/10.1039/d6na00358c","url":null,"abstract":"<p><p>The efficacy of the methanol oxidation reaction is a primary prerequisite for an electrocatalyst in a direct methanol fuel cell (DMFC), which is influenced by the catalyst material and its synthesis technique. This study presents a novel electrocatalyst, specifically zinc vanadate (ZnV), graphitic nitride (CN), and the ZnV/CN nanohybrid, which were synthesized using a hydrothermal technique. This material serves as an anode on a polyurethane sponge sheet as the supporting substrate. The physical and chemical properties of the electrocatalyst were analyzed using scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and chronoamperometry (CA). SEM results indicate that the ZnV/CN nanohybrid-based electrocatalyst has a 3D structure with an exfoliated petal-like morphology resembling a cotton flower, thereby enhancing the active area of the electrocatalyst and facilitating better ion mobility. Furthermore, the highly developed porosity structure offers less resistance and a smooth conduit for protons to access the cathode. The results indicate that the current densities achieved with ZnV, CN, and the ZnV/CN nanohybrid/polyurethane as support layers are 45.4 mA cm^-2, 75.38 mA cm^-2, and 86.11 mA cm^-2, respectively. The findings of this work are expected to be employed in catalyst design for a wide range of energy conversion devices.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":6.3,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13662856/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149195251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biomass-derived nitrogen-doped carbon quantum dot-embedded electrospun PVA/PVP seed coatings for the electrochemical monitoring of germination and stress responses in <i>Vigna mungo</i>.","authors":"Sourav Dey, Soumen Basu, Moushumi Ghosh","doi":"10.1039/d6na00413j","DOIUrl":"10.1039/d6na00413j","url":null,"abstract":"<p><p>In this study, a nanoengineered seed coating formulation composed of polyvinyl alcohol (PVA), polyvinyl pyrrolidone (PVP) and biomass-derived carbon quantum dots synthesized from orange peels (OP-CQDs) was developed. Nitrogen-doped fluorescent OP-CQDs were prepared <i>via</i> a green microwave-assisted route and systematically characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) and Raman spectroscopies, high-resolution transmission electron microscopy (HRTEM), field-emission scanning electron microscopy (FESEM), and zeta potential analysis. The OP-CQDs exhibited a narrow size distribution with an average diameter of 4.63 nm, excellent aqueous dispersibility, high photostability and a fluorescence quantum yield of 52.46%. The OP-CQDs were incorporated into electrospun PVA/PVP membranes to form functional seed coatings, and their structure-property relationships were correlated with germination performance, stress response and electrochemical behaviour during nutrient uptake in <i>Vigna mungo</i>. Seed viability and early seedling development were evaluated using conventional growth metrics and electrochemical techniques, including potentiostatic electrochemical impedance spectroscopy (PEIS) and cyclic voltammetry (CV). Among the formulations investigated, the optimized coating, S₅ (40 wt% OP-CQDs), exhibited an enhanced germination rate, seedling vigor and biomass accumulation. Comprehensive physicochemical analysis of the OP-CQD-embedded electrospun membranes was performed using XRD, FESEM, FT-IR spectroscopy, and UV light observation. Electrochemical studies revealed that the OP-CQD concentration governed charge transfer resistance and ion diffusion behaviour, thereby modulating nutrient uptake kinetics and stress responses during germination. This work demonstrates a multifunctional, biomass-derived CQD-based electrospun coating that integrates controlled nutrient delivery with real-time electrochemical sensing, offering a sustainable material platform for next-generation smart agricultural interfaces.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":6.3,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13602303/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149040123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"<i>In situ</i> synthesized free-standing LiCoPO₄@C nanofibers with multifunctional electrochemical activity for lithium-ion and lithium-sulfur batteries.","authors":"Samal Berikbaikyzy, Ayaulym Belgibayeva, Altynay Zhumabekova, Sung-Soo Kim, Arailym Nurpeissova, Abdul Majid, Yongcheng Jin, Zhumabay Bakenov","doi":"10.1039/d6na00507a","DOIUrl":"https://doi.org/10.1039/d6na00507a","url":null,"abstract":"<p><p>Free-standing LiCoPO₄@C (LCP@C) nanofibers were synthesized by one-pot electrospinning of precursor salts followed by controlled pre-oxidation and carbonization at 400-460 °C. Pre-oxidation temperature controlled a trade-off between crystallinity and carbon retention: moderate treatment (440 °C) yielded uniformly dispersed nanoparticles within a continuous carbon fiber network, while lower and higher temperatures led to compositional heterogeneity and severe carbon depletion, respectively. Notably, bulk electrical conductivity did not scale with carbon content or graphitization degree; LCP@C-440 exhibited the highest conductivity (6.37 × 10^-5 S cm^-1) among the series despite a lower carbon content and graphitization degree, indicating that fiber-network connectivity, rather than carbon quantity, dominates electronic transport. As a high-voltage lithium-ion cathode paired with a fully fluorinated electrolyte, LCP@C-440 delivered an initial capacity of 80 mAh g^-1 with 75% retention after 100 cycles, outperforming literature composites, using the same electrolyte, in cycling stability despite their higher initial capacities. As a multifunctional host for a 1 M Li₂S₆ catholyte, LCP@C-440 retained a discharge capacity of 467 mAh g^-1 after 250 cycles at 0.2C with a coulombic efficiency of ∼98%, and delivered 350 mAh g^-1 at 1C, fully recovering to 534 mAh g^-1 upon returning to 0.1C. These results demonstrate that a one-pot electrospun LCP@C architecture yields a structurally robust, multifunctional electrode, combining improved cycling stability with a fully fluorinated electrolyte in a high-voltage lithium-ion configuration and sustained long-term performance as a lithium-sulfur host.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":6.3,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13651802/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149167992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantitative analysis of carrier concentration and electric field in non-uniform quantum well infrared photodetectors.","authors":"Zhen Chen, Rui Xin, Li Yu, Zhen Deng, Shenjun Wang, Yue Cheng, Hui Xia, Shufan Yao, Tianxin Li","doi":"10.1039/d6na00204h","DOIUrl":"10.1039/d6na00204h","url":null,"abstract":"<p><p>Semiconductor non-uniform quantum wells (NUQWs) improve long-wavelength infrared detection by resolving the trade-off between dark current and responsivity found in conventional uniform structures. By grading doping and barrier thicknesses, these designs enhance absorption in highly doped areas while strengthening electric fields in low-doped regions to trigger carrier multiplication. However, the actual carrier concentration profile within quantum wells (QWs) has long lacked effective experimental verification. In this work, we employed calibrated scanning spreading resistance microscopy (SSRM) to realize nanoscale quantitative analysis of the carrier distribution within GaAs/AlGaAs quantum well infrared photodetector (QWIP) structures. The non-uniform design successfully led to reduction of dark current by nearly 4 times compared to that of the uniform counterparts, thus elevating the background limited infrared photodetection (BLIP) temperature by 4 K. On the other hand, the responsivity failed to show the expected enhancement. Simulations revealed that the deviation of electron densities in the low-doped QWs induces a weak local electric field of approximately 1.7 kV cm^-1, which is significantly below the threshold field to trigger impact ionization. These findings guide the design of an optimized asymmetric gradient-doping structure capable of generating a strong electric field of up to 13.8 kV cm^-1 in the collection region, thereby achieving high gain while maintaining low dark current.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":"6279-6286"},"PeriodicalIF":6.3,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13599731/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149040200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flexible and wearable WSe₂ optoelectronics: current progress, technological challenges, and future directions.","authors":"C K Sumesh, Rahul P Patel, Parth Shah, Pratik M Pataniya","doi":"10.1039/d6na00451b","DOIUrl":"10.1039/d6na00451b","url":null,"abstract":"<p><p>Tungsten diselenide (WSe₂), a prominent member of the two-dimensional (2D) transition metal dichalcogenide (2D-TMDC) family, has attracted significant attention for next-generation flexible and wearable optoelectronic applications owing to its tunable bandgap, excellent carrier transport characteristics, strong light-matter interaction, and superior mechanical flexibility. Recent advancements in heterostructure engineering, composite formation, and sustainable device fabrication have considerably enhanced the performance of WSe₂-based photodetectors and multifunctional electronic devices. In particular, the integration of WSe₂ with paper substrates has emerged as a promising strategy for developing lightweight, low-cost, biodegradable, and electronic systems with potential environmental advantages associated with biodegradable substrates and low-complexity fabrication. This review comprehensively summarizes recent progress in WSe₂ heterostructures and composites fabricated on flexible substrates for flexible and wearable optoelectronics. The fundamental properties of WSe₂, material synthesis routes, electrode fabrication techniques, and heterostructure design strategies are critically discussed. Particular emphasis is placed on the role of interface engineering, defect modulation, doping methods, and hybrid material integration in improving responsivity, detectivity, response speed, and mechanical durability. Furthermore, recent developments in paper-based photodetectors, wearable sensing platforms, self-powered devices, and intelligent optoelectronic systems are systematically assessed through performance benchmarking and comparative analysis. Present challenges associated with material quality, device stability, large-scale manufacturing, and commercialization are highlighted, together with emerging opportunities in sustainable electronics, Internet of Things (IoT) technologies, artificial intelligence-assisted sensing, and next-generation wearable systems. By giving a critical assessment of recent advances and future research directions, this review serves as a valuable resource for the development of high-performance, flexible, and environmentally responsible WSe₂-based optoelectronic technologies.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":6.3,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13647309/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149137862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stimuli-responsive vesicles in water-resistant nanofibers for molecular random access in DNA data storage.","authors":"Jokin Yeregui-Elosua, Diana Soukarie, Cecilia Wetzl, Alexander M Bittner, Ibon Santiago","doi":"10.1039/d6na00595k","DOIUrl":"10.1039/d6na00595k","url":null,"abstract":"<p><p>DNA is an attractive medium for data storage. Enabling efficient random access is essential for the practical use of DNA-based memory. We present a strategy for random access based on the selective release of target DNA from a nanofiber mesh matrix. Messages encoded in sets of DNA sequences are encapsulated inside stimuli-responsive small unilamellar vesicles (SUVs), embedded in an electrospun water-resistant nanofiber mesh. The target sequences are selectively released using orthogonal pH-based triggers. The orthogonality of these triggers enables the preservation of the SUVs containing the non-selected DNA, which remains in the fiber mesh for subsequent retrieval. This work combines sequence-independent chemical addressing with physical compartmentalization and double-layered protection. It represents initial steps towards a PCR-independent molecular selection system for random access in water-resistant fibers with potential applications in DNA-based memory architectures.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":"6382-6392"},"PeriodicalIF":6.3,"publicationDate":"2026-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13632630/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149111861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrothermally synthesised Gd₂Te₄O₁₁ nanorods for broadband visible light photodetection and NLO applications.","authors":"Manoranjan Sahoo, Prabhukrupa Chinmay Kumar, Ramakanta Naik","doi":"10.1039/d6na00631k","DOIUrl":"10.1039/d6na00631k","url":null,"abstract":"<p><p>Rare earth tellurium oxides belong to a wide bandgap group, which makes them prominent candidates for optoelectronic applications. Gadolinium tellurate (IV) (GTO) samples with varying concentration ratios of Gd and Te were synthesised through a hydrothermal method. All samples confirmed the Gd₂Te₄O₁₁ structure with a monoclinic crystal system. Nanorods are observed in most samples, and EDX confirmed the presence of the constituent elements. The XPS study was carried out to obtain the chemical composition and oxidation states. Optical studies of materials showed band gap values lying between 4.1 eV and 4.3 eV. From the photoresponse study, it is clear that the performance of all GTO photodetector devices (PDs) is good. The nonlinear optical (NLO) study confirmed that the nonlinear refractive index dominated over two-photon absorption for all samples, with a maximum nonlinear refractive index of 3.305 × 10^-5 cm² W^-1 and a nonlinear optical susceptibility of 38.811 × 10^-4 (esu). All the samples showed a high figure of merit (FOM), with a maximum value of 195.789. This makes GTO samples suitable for all nonlinear optical devices and optical switching applications.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":"6427-6437"},"PeriodicalIF":6.3,"publicationDate":"2026-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13636259/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149111902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Retraction: Iron-selenide-based titanium dioxide nanocomposites as a novel electrode material for asymmetric supercapacitors operating at 2.3 V.","authors":"Muhammad Zia Ullah Shah, Hongying Hou, Muhammad Sajjad, Muhammad Sanaullah Shah, Kashif Safeen, A Shah","doi":"10.1039/d6na90072k","DOIUrl":"10.1039/d6na90072k","url":null,"abstract":"<p><p>[This retracts the article DOI: 10.1039/D2NA00842D.].</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":"6073"},"PeriodicalIF":6.3,"publicationDate":"2026-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13591313/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149017361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Data-driven machine learning optimisation of silver nanoparticle synthesis.","authors":"Joseph Carver, Y M John Chew, Semali Perera, Sourav Chatterjee","doi":"10.1039/d6na00557h","DOIUrl":"10.1039/d6na00557h","url":null,"abstract":"<p><p>Precise control of silver nanoparticle (Ag-NP) size is critical for application-specific performance, yet identification of optimal synthesis conditions remains reliant on trial-and-error experimentation. Here, we report a machine learning inverse design framework trained on a combined experimental dataset spanning batch and continuous flow reactor configurations. Five regression algorithms were evaluated as candidate surrogate models, with Gaussian process (GP) regression emerging as the best-performing model (coefficient of determination (<i>R</i> ²) = 0.91 and cross-validation score = 0.80). A random sampling strategy was employed to explore the parameter space and identify synthesis conditions capable of achieving user-defined target Ag-NP hydrodynamic diameters. To differentiate between the multiple feasible solutions, a composite candidate scoring function was implemented to rank synthesis conditions according to the error, estimated Ag-NP dispersity, and posterior uncertainty. The framework was validated across 21 inverse design predictions spanning a target size range of 20-70 nm, achieving average size errors of 3.4% and 7.4% for the batch and flow reactors, respectively. Collectively, this work establishes an experimentally validated inverse design framework capable of identifying synthesis conditions for target Ag-NP hydrodynamic diameters <i>via</i> citrate- and tannic acid-mediated reduction of silver nitrate.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":"6229-6242"},"PeriodicalIF":6.3,"publicationDate":"2026-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13592209/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149017305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interfacial electronic reconstruction and charge-transfer kinetics in colloidally assembled S-scheme MoSe₂/porphyrin heterostructures for solar water splitting.","authors":"Giang Thi Nguyen, Anh Hoang Nguyen, Nguyet Minh Thi Quan, Mai Thi Nguyen, Matteo Tonezzer, Duong Duc La, Thuy Dieu Thi Ung, Long Duy Pham, Tung Thanh Nguyen, Duy Van Lai","doi":"10.1039/d6na00780e","DOIUrl":"https://doi.org/10.1039/d6na00780e","url":null,"abstract":"<p><p>Rational interfacial engineering of organic-inorganic heterostructures is pivotal for advancing solar-driven water splitting. In this work, a 3D/1D S-scheme heterojunction, integrating 2H-MoSe₂ nanoflowers and TCPP porphyrin nanofibers, was synthesized <i>via</i> a scalable non-covalent self-assembly approach. Structural characterization reveals that the hierarchical MoSe₂ architectures, composed of ultrathin nanosheets, are intimately coupled with π-conjugated porphyrin networks, resulting in a nearly three-fold increase in specific surface area (84.96 m² g^-1) relative to pristine MoSe₂. Detailed band alignment analysis confirms a pronounced interfacial electronic reconstruction and the establishment of a built-in electric field, characteristic of an S-scheme configuration. Under simulated solar illumination, this configuration promotes the selective recombination of lower-energy carriers, effectively preserving highly reductive electrons in the LUMO of TCPP and highly oxidative holes in the valence band of MoSe₂. Consequently, the optimized heterostructure exhibits significantly accelerated oxygen evolution reaction (OER) kinetics characterized by a low Tafel slope of 101 mV dec^-1. This work presents a strategic design of S-scheme photocatalysts for efficient hydrogen evolution, providing a robust pathway toward sustainable solar fuel production.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":6.3,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13632634/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149111833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}