Applied Surface Science Advances最新文献

{"title":"Thermally-induced microstructural evolution in nanoparticle-based CuO, WO3 and CuO–WO3 thin films for hydrogen gas sensing","authors":"Kalyani Shaji ,&nbsp;Stanislav Haviar ,&nbsp;Petr Zeman ,&nbsp;Michal Procházka ,&nbsp;Radomír Čerstvý ,&nbsp;Nirmal Kumar ,&nbsp;Jiří Čapek","doi":"10.1016/j.apsadv.2025.100768","DOIUrl":"10.1016/j.apsadv.2025.100768","url":null,"abstract":"<div><div>This study systematically investigates the microstructural evolution of nanoparticle-based CuO, WO<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>, and composite ‘CuO–WO<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>’ thin films induced by their post-deposition annealing. The films were reactively deposited using a magnetron-based gas aggregation technique, with the composite films consisting of alternating monolayers of CuO and WO<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> nanoparticles. After deposition, the films were annealed in synthetic air at temperatures ranging from 200 to 400<!--> <span><math><mrow><mo>°</mo><mi>C</mi></mrow></math></span> and characterized using scanning electron microscopy, X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy. Annealing of the CuO films led to the most pronounced changes associated with a gradual enhancement of crystallinity accompanied by significant particle growth with increasing annealing temperature, while the WO<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> and CuO–WO<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> films were more thermally stable to crystallization and particle growth. Notably, at 400<!--> <span><math><mrow><mo>°</mo><mi>C</mi></mrow></math></span>, the CuO–WO<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> films crystallized into a novel <span><math><mi>γ</mi></math></span>-CuWO<span><math><msub><mrow></mrow><mrow><mn>4</mn></mrow></msub></math></span> phase. The annealed films were further evaluated for their gas-sensing performance upon H<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> exposure and the obtained results were analyzed in relation to film properties and the microstructural evolution induced by annealing.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"28 ","pages":"Article 100768"},"PeriodicalIF":7.5,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144203153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new approach for nuclear forensics investigations of uranium dioxide: Application of laboratory-based photoelectron spectroscopy with hard and Soft X-ray sources","authors":"Stuart A. Dunn ,&nbsp;Paul Roussel ,&nbsp;Aaron Wood ,&nbsp;Ben F. Spencer ,&nbsp;Robert W. Harrison ,&nbsp;Philip Kaye ,&nbsp;Matthew Higginson ,&nbsp;Matthew R. Gilbert ,&nbsp;Simon C. Middleburgh ,&nbsp;Wendy R. Flavell","doi":"10.1016/j.apsadv.2025.100782","DOIUrl":"10.1016/j.apsadv.2025.100782","url":null,"abstract":"<div><div>Nuclear Forensic investigations rely on the analysis of the chemical and physical properties of nuclear materials. X-ray photoelectron spectroscopy (XPS) is a powerful tool that supports material assessment, typically analyzing the top few nanometers of the material. The onset of laboratory-based hard X-ray photoelectron spectroscopy (HAXPES) instrumentation provides the opportunity to probe deeper into the material’s bulk. The work presented in this study demonstrates the utility of a combined XPS and HAXPES analysis to isolate forensic signatures on the surface and into the bulk of uranium dioxide. A non-destructive depth profile, using the transitions observable with a 9.25 keV excitation source, highlighted an oxidized overlayer deeper than the XPS sampling depth. Peak fitting of high-resolution spectra allows identification of uranium oxidation states as well as inspection of secondary features, which provide insight into the material characteristics with an evolving chemistry from the surface to a more bulk like composition. Inelastic background analysis is performed to determine the in-depth distribution of atoms, developing a consistent model to describe the surface overlayer, correlated to the chemical and stoichiometric differences over the excitation range. Finally, the <em>MNN</em> X-ray excited Auger electron spectra are acquired from uranium dioxide for the first time for future use in the application of a Wagner chemical state plot to support nuclear forensics investigations.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"28 ","pages":"Article 100782"},"PeriodicalIF":7.5,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144212243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Generation of Schottky heterojunction (SnO2-Au NPs) transparent thin film for Ciprofloxacin photodegradation” [Applied Surface Science Advances Volume 27, June 2025, 100751]","authors":"J.G. Cuadra ,&nbsp;S. Molina-Prados ,&nbsp;Gladys Mínguez-Vega ,&nbsp;L.A. Abderrahim ,&nbsp;J. Colombari ,&nbsp;J.B. Carda ,&nbsp;Nuno P.F. Gonçalves ,&nbsp;R.M. Novais ,&nbsp;J. Labrincha","doi":"10.1016/j.apsadv.2025.100779","DOIUrl":"10.1016/j.apsadv.2025.100779","url":null,"abstract":"","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"27 ","pages":"Article 100779"},"PeriodicalIF":7.5,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design of faceted 0D/1D CeO2/ZnO S-scheme heterostructures for solar-driven methanol production","authors":"Hazina Charles,&nbsp;Plassidius J. Chengula,&nbsp;Jiyeon Seo,&nbsp;Caroline Sunyong Lee","doi":"10.1016/j.apsadv.2025.100781","DOIUrl":"10.1016/j.apsadv.2025.100781","url":null,"abstract":"<div><div>Efficient solar-driven conversion of CO₂ into value-added chemical presents a promising approach to addressing climate change and energy scarcity. However, sluggish charge carrier kinetics remain a significant barrier to effective CO₂ photoreduction. In this study, a solvothermal method is employed to synthesize facet-engineered CeO₂/ZnO nanorod (NRs) S-scheme heterojunctions for the selective photoreduction of CO₂ to methanol under mild conditions. Comprehensive characterization confirms the successful deposition and stability of CeO₂ nanoparticles on the surface of ZnO NRs. Among the synthesized photocatalysts, the composite with 0.2 mmol CeO₂ exhibits the best performance, yielding 111 µmol·g^₋1, 176 µmol·g^₋1, 311 µmol·g^₋1, and 304 µmol·g^₋1·h^₋1 for H₂, CO, CH₄, and CH₃OH, respectively, with a notable CO₂ selectivity of approximately 89 %. Mechanistic analysis reveals that optimized CeO₂ loading induces an internal electric field, facilitating an S-scheme heterojunction charge-transfer pathway that enhances electron mobility from the ZnO NRs to CeO₂. In-situ FT-IR spectroscopy further identifies key intermediates (HCOO* and H₃CO*) involved in the transformation of CO₂ to CH₃OH. This work demonstrates a novel photocatalyst design that leverages precise CeO₂ loading onto ZnO NRs, offering a promising strategy for efficient and selective CO₂ photoreduction.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"27 ","pages":"Article 100781"},"PeriodicalIF":7.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Protective coatings for complex organic flexible materials I: characterization and tribological performance of TiO2 and ZnO films deposited by magnetron sputtering on cork” [Applied Surface Science Advances 27 (2025) 100753]","authors":"B. Tiss ,&nbsp;D. Martínez-Martínez ,&nbsp;C. Mansilla ,&nbsp;J.R. Gomes ,&nbsp;C.S. Abreu ,&nbsp;N. Pereira ,&nbsp;L. Cunha","doi":"10.1016/j.apsadv.2025.100778","DOIUrl":"10.1016/j.apsadv.2025.100778","url":null,"abstract":"","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"27 ","pages":"Article 100778"},"PeriodicalIF":7.5,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of porous Au nanowires on a mirror featuring ultrahigh-density nanogaps via plasma-assisted nanotransfer printing for enhanced SERS","authors":"Hyojin An ,&nbsp;Zhi-Jun Zhao ,&nbsp;Minje Kim ,&nbsp;Sang Ho Shin ,&nbsp;Ji-Hwan Ha ,&nbsp;Jun-Ho Jeong ,&nbsp;Jun-Hyuk Choi ,&nbsp;Dae Geun Choi ,&nbsp;Eun-Ji Gwak ,&nbsp;Byeong-Kwon Ju ,&nbsp;Joo-Yun Jung","doi":"10.1016/j.apsadv.2025.100780","DOIUrl":"10.1016/j.apsadv.2025.100780","url":null,"abstract":"<div><div>Although porous metal nanostructures with densely distributed nanogaps offer exceptional potential to significantly enhance surface-enhanced Raman scattering (SERS) signals, fabrication of ultrahigh-density nanogaps that increase the density and intensity of hotspots remains a critical challenge. In this study, we fabricate hierarchically engineered porous Au nanostructures (P-Au NSs) with ultradense hotspots on various substrates using a nanotransfer printing (nTP) system. Ultradense P-Au nanowires exhibit superior plasmonic coupling at stacked cross-points, which can be attributed to their increased contact areas arising from porous architecture. In addition, experimental results and numerical simulations confirm the plasma-treated P-Au nanowire on a mirror (pPAN on M) structure produced via an advanced nTP process further enhancing hotspot formation. The SERS performance was evaluated using 4-mercaptobenzoic acid (4-MBA) and thiram with an optimized substrate achieving a Raman enhancement factor of 1.21 × 10¹² and limit of detection for 4-MBA of ∼6.46 × 10⁻¹³ M. These findings underscore the significant potential of the developed P-Au NSs not only for ultrasensitive SERS detection but also for diverse applications in energy storage, catalysis, and optoelectronics.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"27 ","pages":"Article 100780"},"PeriodicalIF":7.5,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144138018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Atomic-scale insights into electronic structure of lattice-work structures on rutile TiO2(001) surface","authors":"Eiichi Inami ,&nbsp;Seiga Koga ,&nbsp;Linfeng Hou ,&nbsp;Fengxuan Li ,&nbsp;Daiki Katsube ,&nbsp;Masayuki Abe","doi":"10.1016/j.apsadv.2025.100777","DOIUrl":"10.1016/j.apsadv.2025.100777","url":null,"abstract":"<div><div>The lattice-work structure (LWS), a {114}-faceted surface reconstruction on rutile TiO₂(001), has been recognized for its potential in visible-light-driven photocatalysis. Although various spectroscopic techniques have provided insights into its electronic properties, their resolution was insufficient to directly correlate electronic states with the atomic structure, a key factor for understanding LWS-based photocatalysis. In this study, we investigated the atomic and electronic structures of LWS on rutile TiO₂(001) using ambient atomic force microscopy (AFM), Kelvin probe force microscopy (KPFM), and ultrahigh-vacuum scanning tunneling microscopy (STM). AFM imaging revealed that annealing induces the formation of short, bright rows along the <span><math><mrow><mo>[</mo><mn>110</mn><mo>]</mo></mrow></math></span> and <span><math><mrow><mo>[</mo><mn>1</mn><mover><mrow><mn>1</mn></mrow><mo>‾</mo></mover><mn>0</mn><mo>]</mo></mrow></math></span> directions, which subsequently elongate and eventually cover the surface. Adjusting the annealing parameter thus allows us to control the LWS coverage. KPFM surface potential mapping indicated that these rows are negatively charged relative to the surrounding terraces, suggesting localized charge accumulation. Atomic-resolution STM and scanning tunneling spectroscopy confirmed a site-dependent electronic structure, with the atomic sub-row atop the LWS exhibiting a reduced band gap (∼1.75 eV) compared to that in valley parts of the LWS (&gt;3.0 eV). These findings directly linked the atomic structure of LWS to its local electronic states, clarifying the role of LWS in photocatalysis. Moreover, controlling LWS coverage via annealing enables tuning of the electronic states and local band gap variations, which can significantly influence photocatalytic performance under specific wavelengths of light.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"27 ","pages":"Article 100777"},"PeriodicalIF":7.5,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of diffusivity on the thermal transport of colloidal nanocrystal superlattices and nanofluids","authors":"Yuchen Li ,&nbsp;Cheng Shao ,&nbsp;Kae-Lin Wong ,&nbsp;Wee-Liat Ong","doi":"10.1016/j.apsadv.2025.100770","DOIUrl":"10.1016/j.apsadv.2025.100770","url":null,"abstract":"<div><div>Nanocrystals (NCs) integrated into a matrix can form an NC-based composite. The diffusivity of NCs significantly influences the thermal transport properties of these composites, yet its effects remain inadequately studied. This study investigates typical nanofluids and colloidal NC superlattices found in NC-based composites. By varying the diffusivity of NCs over eight orders of magnitude, we analyzed its impact using the Green-Kubo equilibrium molecular dynamics (GK-EMD) method. Our findings indicate that when the diffusivity exceeds 10⁻⁵ Ų/ps, it artificially inflates the calculated thermal conductivity (TC) up to 60,000%, requiring a modification to the heat flux formulation to correct. Conversely, when diffusivity is below 10⁻⁵ Ų/ps, it amplifies the fluctuations in the heat flux, leading to greater uncertainty in the results, which can be mitigated using the same heat flux modification. Based on the precise TC results for the two NC-based composites, we demonstrate that the vibrational mismatch between the two fluid layers closest to the NC surface, rather than between the NC surface and the fluid, governs the TC of the nanofluid. Although the diffusivity of NCs in the colloidal NC superlattice increases with temperature, it contributes less than 10% to the total TC at 400 K. Moreover, no evidence was found of collective vibrational modes contributing to thermal transport at low temperatures, contrary to a previous study [Materials Today Physics 22 (2022) 100601]. This discrepancy arises from the differences in heat flux calculation methods.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"27 ","pages":"Article 100770"},"PeriodicalIF":7.5,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of chip size effects of thin film GaN-based μLEDs fabricated by plasma etching and ion implantation processing","authors":"Tsung-Chih Wan ,&nbsp;Ping-Hsun Tsai ,&nbsp;Hao-Wu Lin ,&nbsp;Chien-Chung Lin ,&nbsp;Dong-Sing Wuu ,&nbsp;Hiroshi Amano ,&nbsp;Tae-Yeon Seong ,&nbsp;Ray-Hua Horng","doi":"10.1016/j.apsadv.2025.100776","DOIUrl":"10.1016/j.apsadv.2025.100776","url":null,"abstract":"<div><div>We investigated the effects of chip size and N-polar n-GaN surface roughening on the performance of conventional thin-film blue-light micro-light-emitting diodes (TFFC μLEDs) and As⁺ ion isolated TFFC blue μLEDs. For this, TFFC μLEDs with two different sizes of 10 × 10 μm² and 25 × 25 μm² pixel array were fabricated. In all samples, N-face n-GaN surfaces were etched using a 4 M KOH solution after laser lift-off (LLO) process. A 2 min-etching resulted in the formation of pyramids (size: ∼90 – ∼270 nm), while the 4 min-etching produces pyramids (∼370 – ∼780 nm). Regardless of treatments, all samples exhibit similar forward bias characteristics. For all samples, the light output power increased after n-GaN surface roughening. Before the LLO process, the 10 μm-μLEDs showed higher EQE than the other samples with the implanted μLEDs showing the lowest EQE. All samples exhibited their highest EQE after optimal 4-min etching. Unlike before LLO, after 4 min-etching, the 10 μm- and 25 μm-μLEDs show almost similar EQEs, while the implanted μLEDs reveal a slightly lower EQE than the mesa μLEDs, but produce up to 74 % EQE improvement. Furthermore, the 10 μm-μLEDs showed the shortest photoluminescence (PL) decay, while the 25 μm-μLEDs gave the longest PL decay. The 10 μm μLEDs showed the highest ideality factor and the As⁺ ion-implanted μLEDs gave the lowest value. Based on time resolved PL and ideality factor, the size and etching time dependence of the EQE characteristics of all samples are described and discussed.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"27 ","pages":"Article 100776"},"PeriodicalIF":7.5,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transforming Chitosan into N-Doped Carbon for Efficient CO2 Capture: A comprehensive Review","authors":"Celca Rahmatunnisa ,&nbsp;Raudhatul Islam Chaerun ,&nbsp;Canggih Setya Budi ,&nbsp;Noto Susanto Gultom","doi":"10.1016/j.apsadv.2025.100774","DOIUrl":"10.1016/j.apsadv.2025.100774","url":null,"abstract":"<div><div>Carbon dioxide (CO₂) emissions contribute significantly to global warming, and hence the development of an efficient carbon capture system is essential. This review article explores the prospects of N-doped carbon materials derived from chitosan for CO₂ capture. Chitosan is a nitrogen-rich, easily biodegradable biopolymer that can be used as an ideal precursor for the production of N-doped carbon materials with tuned porosity and high surface area. The nitrogen content increases the adsorption performance by creating active sites for chemisorption and physisorption, while hierarchical pore structures optimize CO₂ diffusion and retention. Further enhancements in material performance are introduced with innovations in chemical activation and nitrogen-enriched additives. We comprehensively review the existing method for transforming chitosan into N-doped carbon materials for carbon capture applications. This study concludes that these sustainable materials possess great significant potential for industrial-scale CO₂ capture and mitigation, aligning with sustainable development goal SDGs 13: Climate Action. Future research should focus on optimizing the synthesis methods, enhancing the functional stability, and integrating this material in the form of beads rather than powder. These efforts aim to significantly improve both effectiveness and sustainability for large-scale and real-world applications.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"27 ","pages":"Article 100774"},"PeriodicalIF":7.5,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144099790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}