Applied Surface Science最新文献

{"title":"A Cu-doped SiO2 memristive nociceptor utilized for sport monitoring via surface electromyography","authors":"Bo Zhang, Xinmou Ning, Guangyu Wen, Xu Zhao, Janicek Petr, Stanislav Slang, Tomas Wagner","doi":"10.1016/j.apsusc.2025.164625","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.164625","url":null,"abstract":"Nociceptor is a type of receptor that senses harmful stimuli from the external environment to avoid further damage. The emulation of biological nociceptor is highly important for the potential application of humanoid robot and electronic skin helping patients who lose pain sensation. In this work, we fabricate a memristive device based on Cu-doped SiO₂, which works in volatile and nonvolatile modes. The morphology of the metallic conductive filaments, as observed by scanning electron microscopy with a focused ion beam, reveals the occurrence of conductive filament dissolution, which directly explains the phenomenon of nonvolatile switching. The memristive device exhibits all the elementary features of nociceptors, i.e., threshold, relaxation, “inadaptation” and sensation of “allodynia/hyperalgesia”. On the basis of these findings, the device is applied for sports monitoring via surface electromyography signals, which is utilized to predict potential injury or fatigue of muscles. Furthermore, the simple design of artificial nociceptors emulated via memristive devices could also be promising for medical purposes in the future.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"66 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 into the alteration of structural stability and interfacial properties of iron oxalate anodes through lithium stearate modification","authors":"Bo Jin, Geng Gao, Qing Zhao, Xiang Lin, Bin Yang, Shaoze Zhang, Keyu Zhang, Yaochun Yao","doi":"10.1016/j.apsusc.2025.164637","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.164637","url":null,"abstract":"Anhydrous iron oxalate is considered as highly promising anode material for lithium-ion batteries due to its substantial specific capacity and cycling stability. Nevertheless, iron oxalate synthesized through conventional methods typically incorporates two molecules of crystalline water. The removal of crystalline water often leads to defects, such as volume rupture and structural collapse, thereby compromising cycling stability. Herein, we propose a method to improve structural stability via melt-coating of lithium stearate under low-temperature. Lithium stearate functions as a structure-modifying additives and economical organolithium salt, can mitigate the collapse of particle surface and prevent interlayer slippage as iron oxalate loses crystalline water. Meanwhile, it also can facilitate the rapid formation of stable solid electrolyte interphase on surface of iron oxalate during cycling, enabling extensive interaction with the electrolyte in initial stages. This interaction reduces interfacial lithium-ion transport resistance and improves coulombic efficiency in the early phases of cycling. In half-cell cycling stability tests, iron oxalate modified with lithium stearate interface exhibits excellent reactivity and superior capacity retention, maintaining capacity retention of 74.2 % after 300 cycles at 3 A g⁻¹. This study offers a novel interface regulation method for improving the performance of transition metal oxalate materials and other innovative anode materials.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"34 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanistic study on the Al3+-enhanced inhibitory effect of konjac glucomannan in the flotation separation of fluorite and calcite","authors":"Mingyan An, Dan Liu, Luyi Xu, Xin Chen, Fuhua Luo, Shuming Wen","doi":"10.1016/j.apsusc.2025.164631","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.164631","url":null,"abstract":"This study investigates the inhibitory effect of Al³⁺-enhanced konjac glucomannan (KGM) on calcite in the flotation separation of fluorite from calcite. Microflotation tests demonstrated that KGM suppresses calcite recovery, and this effect is markedly strengthened by the presence of Al³⁺. SEM observations revealed notable alterations in calcite surface morphology after reagent conditioning. With Al³⁺ addition, submicron flocculates of the reagent were observed on the calcite surface, and EDS confirmed the presence of Al. FTIR spectra exhibited a new absorption band at 1635–1640 cm⁻¹ on the calcite surface after reagent addition, corresponding to the stretching vibrations of acetyl (CH₃CO–) or carbonyl (C=O) groups, indicating effective adsorption of KGM. Solution chemistry and XPS analyses showed that Al³⁺ in solution formed Al(OH)₃ and Al₂O₃, which subsequently adsorbed onto the calcite surface and promoted KGM adsorption. DFT calculations revealed that KGM forms Ca<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>O bonds with fluorite and Ca<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>O, C<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>H, and H<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>O bonds with calcite, with this bonding difference accounting for its selective inhibition of calcite. Moreover, Al₂O₃ formed Al<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>O bonds on the calcite surface, increasing available adsorption sites for KGM and thereby further enhancing its inhibitory effect.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"164 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dyadic Ru-based nanomaterials for visible light-driven photocatalytic hydrogen evolution","authors":"Gerard Martí, Marc Alique, Isidoro López, Laia Francàs, Roger Bofill, Olivier Schott, Garry S. Hanan, Álvaro Lozano-Roche, Nuria Romero, Karine Philippot, Antoni Llobet, Mirco Natali, Jordi García-Antón, Xavier Sala","doi":"10.1016/j.apsusc.2025.164621","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.164621","url":null,"abstract":"Visible light-driven water splitting is an appealing strategy to store renewable energy in the chemical bonds of molecular hydrogen. In this regard, the development of photocatalytic architectures where charge transfer and recombination can be controlled represents a key challenge. The surface functionalization of Ru/RuO₂ nanoparticles (NPs) with the [Ru(2,2′-bpy)₂(qpy)](PF₆) photosensitizer (PS), yielding PS-NPs “dyadic” hybrid nanomaterials, represents a promising strategy. Four HER photocatalysts with different PS:NPs ratios are synthesized and thoroughly characterized by analytical and spectroscopic techniques. X-ray photoelectron spectroscopy (XPS) reveals the covalent binding of the PS to the NPs surface. Analysis of the photocatalytic performance in aqueous triethanolamine (TEOA) shows that the activation of the nanocatalyst (RuO₂ reduction) and the hydrogen evolution rate improves when the PS loading increases. Under visible-light irradiation, the nanomaterials with higher PS loading show sustained production of hydrogen for at least 80 h. The morphological and compositional evolution of the hybrid nanomaterials under photocatalytic conditions is studied and correlated with hydrogen production rates over time, pointing at a sequential leaching of PS from the nanomaterials surface. Additionally, photophysical experiments allow attaining an insight into the photochemical mechanism, which involves oxidative quenching with a fast electron injection, but also fast back electron transfer.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"28 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145056940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Raman and scanning spreading resistance mapping of the evolution of structural phases near the insulator–metal transition in VO2 films","authors":"O.F. Kolomys, V.V. Strelchuk, P.M. Lytvyn, D.M. Maziar, V.M. Dzhagan, O.V. Dubikovskyi","doi":"10.1016/j.apsusc.2025.164627","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.164627","url":null,"abstract":"Vanadium dioxide (VO₂) is a strongly correlated oxide whose switching and thermochromic performance depend on nanoscale features of the insulator-to-metal transition (IMT). Here we combine sub-micron Raman mapping with nanoscale scanning spreading-resistance microscopy (SSRM) to visualize, in real space, the coupled structural-electronic transformations in VO₂/Si(001) films. X-ray diffraction and energy-dispersive analysis confirm a highly textured monoclinic M1 phase with nearly stoichiometric composition and grain size distribution (∼200 nm). Temperature-resolved Raman maps reveal that the monoclinic (M1) → rutile (R) transition proceeds through spatially discrete nucleation at grain boundaries and both phases coexist over 65–67 °C window, producing a wider (5 °C) percolative regime rather than a sharp bulk‐like jump. Correlative SSRM shows that grain cores are an order of magnitude more conductive than their boundaries at 25 °C, yet the latter exhibit a steeper resistance collapse when either local heating (45 °C) or an AFM-tip bias &gt;60 MVm⁻¹ is applied. A first-order, electrically driven IMT is triggered at ∼100 MVm⁻¹, shrinking the resistance distribution from 60 kΩ to 3 kΩ and erasing the grain/boundary contrast. Individual grains exhibit distinct critical fields (at 0.8–1.2 V bias) and hysteresis widths (0.27–0.39 V), influenced by local strain and defect density.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"21 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145056905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface and interface engineering of p-type Cu2O-CuO heterostructures featuring innovative 2D-CuO nanoflake morphology on Cu2O thin film for enhanced photoelectrochemical water splitting","authors":"Quan Yee Tey, Wen Cai Ng, Meng Nan Chong","doi":"10.1016/j.apsusc.2025.164622","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.164622","url":null,"abstract":"<em>p</em>-Type cuprous oxide (Cu₂O) holds significant potential for the half-reduction reaction in photoelectrochemical (PEC) water splitting owing to its optimal bandgap and energy band alignment. However,<!-- --> <!-- -->challenges like photocorrosion, poor charge separation, and rapid charge recombination limit its practical application. This study pioneers an innovative cuprous-cupric oxide (Cu₂O-CuO) heterojunction bilayer synthesized via Cu₂O deposition onto an FTO substrate, followed by surface and interface engineering to form 2D-ordered CuO nanoflakes (CuO-NF) via hot alkali treatment and thermal oxidation. The Cu₂O-CuO-NF photocathode achieved an impressive photocurrent density of −2.96 mA/cm² <!-- -->at −0.60 V <em>vs</em> Ag/AgCl, produced 78.1 µmol cm⁻² of hydrogen (H₂) in 2 h, and demonstrated a high Faradaic efficiency of 90 %. The enhanced performance is attributed to the increased active surface area of the 2D-nanoflake morphology, validated by electrochemically active surface area measurements, and the reduced charge transfer resistance as demonstrated by electrochemical impedance spectroscopy. The Cu₂O-CuO-NF structure also extends the charge carrier lifetime from 22.11 msec to 59.32 msec. These findings highlight the efficacy of harnessing the Cu₂O-CuO-NF heterostructure in improving charge separation, reducing charge recombination and achieving an overall improvement in PEC water splitting performance.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"19 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145056943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Controlled synthesis of TaC coating on carbon fiber by molten salt disproportionation reaction","authors":"Zijun Zhang, Yiping Yu, Wei Li, Song Wang","doi":"10.1016/j.apsusc.2025.164584","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.164584","url":null,"abstract":"Fiber damage constitutes a critical issue during the fabrication and service processes of carbon fiber-reinforced ultra-high-temperature ceramic matrix composites. Deposition of tantalum carbide (TaC) coating has been demonstrated as an effective route to mitigate the carbon fiber damage. In this work, a molten salt disproportionation reaction has been used to prepare uniform TaC coating on carbon fiber. The thickness of TaC coating can be precisely adjusted from 600 to 1200 nm through controlled reaction duration. Prolonged reaction time in molten salt shifted the phase composition from TaC to a mixture of TaC and carbon-deficient Ta₄C₃. Microstructural evolution of the TaC coating revealed a transition stage involving partial grain growth, followed by transformation into a columnar morphology. Thermodynamic calculations further demonstrated that the TaC coating synthesized via molten salt disproportionation primarily forms on the carbon fiber surface through an indirect reaction pathway: Ta⁵⁺ reacts with metallic Ta to generate intermediate Ta³⁺/Ta²⁺ species, which subsequently react with the carbon fiber. Collectively, these findings indicate a three-stage coating growth mechanism: rapid nucleation, grain growth, and recrystallization","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"16 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancement of surface relief grating inscription in new 5-azoquinoline functionalized copolymers","authors":"Dariusz Chomicki, Vitaliy Smokal, Robert Czaplicki, Oksana Kharchenko, Oksana Krupka, Beata Derkowska-Zielińska","doi":"10.1016/j.apsusc.2025.164611","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.164611","url":null,"abstract":"The impact of donor/acceptor substituents in 5-azoquinoline-functionalized methacrylic copolymers on the formation of surface relief grating has been investigated. It was found that the diffraction efficiency and surface modulation depth of the recorded gratings are significantly affected by the presence of highly donating groups and correlate with the bathochromic absorption shift. It was demonstrated that some of the studied 5-azoquinoline-functionalized copolymers, containing strong electron-donating substituents (such as the diethylamino group), have shown one and a half times better surface relief grating formation than Disperse Red 1, one of the highly effective reference materials in relief grating formation. The generated grating remains stable even after superimposing it with an additional orthogonally fabricated surface modulation. The SRG, however, can be almost completely erased on demand with one beam used for inscription.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"28 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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-piece bifurcated piezoelectric nanotubes for controlled drug release","authors":"Cong Wu, Pengfei Gao, Chun Zhang, Guolu Mu, Kang Zhao, Yufei Tang","doi":"10.1016/j.apsusc.2025.164635","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.164635","url":null,"abstract":"The prevention of bacterial infections in medical titanium implants remains a critical challenge. Although titanium dioxide nanotube array coatings have been widely used for drug loading, the explosive release of drugs in the early stage limits their ability to achieve sustained antibacterial effects. In this work, the nanotube structure was cleverly optimized and the nanotube with one-piece bifurcated design was successfully fabricated. The formation mechanism of one-piece bifurcated nanotubes was analyzed, detailed the in-situ reaction process for generating one-piece bifurcated piezoelectric nanotubes. Furthermore, the piezoelectric effect was incorporated into the coating system, and the synergistic mechanism between the piezoelectric effect and the nanotube structure was thoroughly investigated. Interestingly, in contrast to conventional drug-loaded nanotube coatings, which typically exhibit a decreasing antibacterial efficiency over time when immersed in PBS, the nanotube-structured coating developed in this study demonstrates a significantly higher antibacterial rate on day 14 compared to day 1. The one-piece bifurcated piezoelectric nanotube drug-loaded coating not only achieves prolonged antibacterial efficacy but also exhibits excellent osteoblast compatibility. These achievements provide robust experimental data and theoretical support for the design of nanotube-structured coatings on medical titanium surfaces, the realization of sustained antibacterial functions, and the synergistic application of piezoelectric effects.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"76 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"LaCeOx nanodots prepared by flame spray pyrolysis assisted enhancement of slurry suspension for efficient chemical mechanical polishing","authors":"Yongzhi Zhao, Xinhao Meng, Yunhao Zhang, Mingren Liu, Dongliang Zhang, Zhiqiang Li, Jiechao Jiang, Wei Bi, Mitang Wang","doi":"10.1016/j.apsusc.2025.164638","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.164638","url":null,"abstract":"Herein, rare earth nano-LaCeO_x solid solution nanodots were prepared by flame spray pyrolysis using low-cost lanthanum-cerium chloride precursors, which were then compounded with micrometer-sized lanthanum-cerium oxide particles to obtain nano/micrometer particle-composite NM-CeO₂ series slurries, which achieved material removal rates as high as 715.7 nm min⁻¹ as well as a significantly enhanced surface roughness, much better than other similar materials. Through the systematic study of powder, slurry and polishing process, it is found that the electrostatic adsorption between N-CeO₂ nanodots and M-CeO₂ nanoparticles can contribute to the reduction of large particle size, which in turn significantly improves the suspensibility of the composite slurry by nearly 8 times. Further, the addition of 2 wt% of PVP dispersant to create a polymer reticulation structure also further enhances the suspending ability of the compliant slurry, which ultimately decreases in suspensibility by only about 6 % after 2 days. Notably, the abundant oxygen vacancy positive electric centers prompted by the lattice distortion induced by the La element greatly contribute to the ability of the composite slurry to capture oxygen-containing groups, creating favorable conditions for the formation of Ce-O-Si bonds. Such covalent bonds superimposed on the mechanical cutting ability of micron-sized large particles endowed the composite slurry with excellent polishing performance, and the optimal polishing slurry formulation, NM-PVP-2, was finally obtained. This study will provide a new idea for the industrialized preparation of nano rare earth oxides and a highly dispersed polishing slurry for chemical mechanical polishing technology.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"143 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145059422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}