Surfaces and Interfaces最新文献

{"title":"Unveiling migration mechanisms of Mg and Sc atoms at ScAlMgO4-GaN interfaces","authors":"Yueping Hu ,&nbsp;Weifang Lu ,&nbsp;Jinjian Yan ,&nbsp;Yang Sun ,&nbsp;Guangyang Lin ,&nbsp;Wei Huang ,&nbsp;Kai Huang ,&nbsp;Cheng Li ,&nbsp;Satoshi Kamiyama ,&nbsp;Songyan Chen","doi":"10.1016/j.surfin.2025.106401","DOIUrl":"10.1016/j.surfin.2025.106401","url":null,"abstract":"<div><div>The structures and stability of ScAlMgO₄ (SAM)-GaN interface are systematically investigated via first-principles calculations. The mechanisms by which Mg and Sc atoms diffuse into GaN from the SAM substrate under different structural configurations are studied. Energy calculations identified the Sc–O-terminated surface as the most stable one for SAM, followed by a configuration with one Mg(Al)–O layer above the Sc–O layer. Interfacial energy calculations revealed distinct preferences for GaN growth polarity: the Sc–O surface favors bonding with Ga atoms, leading to N-polar GaN growth, while the Mg–O surface preferentially bonds N atoms, resulting in Ga-polar growth. Defect formation energy analysis shows Mg and Sc atoms do not readily diffuse individually from SAM into GaN. In the Sc–O terminated structure, Mg can occupy six-coordinated interstitial sites within GaN under excess Mg conditions. For Sc atoms, direct diffusion through the interface into GaN is also unlikely. However, in the Mg–O terminated structure, dissociated Sc atoms in interfacial region can bind to interstitial sites within GaN, a behavior absent in the Sc–O terminated structure. These findings highlight the critical role of interfacial structure in controlling of Mg and Sc doping, which is crucial for the growth of lattice-matched GaN on SAM. Electronic structure analyses of Mg- or Sc-doped GaN under experimentally relevant concentrations revealed that Sc diffusion into interstitial sites reduces the GaN bandgap, potentially shifting its emission toward longer wavelengths. This study provides insights into precise control of Sc and Mg atoms at SAM-GaN interfaces, offering a pathway for optimizing the electronic and optical properties of GaN grown on SAM substrates.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"64 ","pages":"Article 106401"},"PeriodicalIF":5.7,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143798995","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":"Plasma functionalization and etching of ABS substrates for enhanced adhesion of decorative ZrN coatings","authors":"Zohra Benzarti ,&nbsp;Joana Neiva ,&nbsp;Daniela Santo ,&nbsp;Silvia Gavinho ,&nbsp;Jorge Laranjeira ,&nbsp;Sandra Carvalho ,&nbsp;Nuno Miguel Figueiredo","doi":"10.1016/j.surfin.2025.106403","DOIUrl":"10.1016/j.surfin.2025.106403","url":null,"abstract":"<div><div>Zirconium nitride (ZrN) coatings were deposited onto etched acrylonitrile butadiene styrene (ABS) substrates using low-temperature direct current reactive magnetron sputtering. Plasma etching was employed to modify the substrate's surface reactivity, surface roughness, and hydrophilicity, achieving a high total surface free energy up to 50.2 mN/m, which is essential for strong ZrN coatings adhesion. X-ray diffraction analysis revealed a predominant [111] texture in the ZrN coatings across ABS substrates treated with varying plasma etching times. Interestingly, etching for 5 minutes at 1.5 Pa pressure produced a [200] texture. Varying the etching time from 2 to 8 minutes at a pressure of 0.4 Pa led to the enlargement of height and width of surface feature tops, while etching at 5 minutes and 1.5 Pa resulted in a smaller grain size and a smoother coating surface. ZrN coatings deposited on ABS substrates etched for 5 minutes at 0.4 Pa displayed a golden hue with high lightness (L* ≈ 74%) and a total reflectance of 62% at a thickness of 750 nm. In contrast, increasing the plasma etching pressure to 1.5 Pa led to glossy ZrN coatings with minimal pinholes, though the increased pressure slightly reduced total reflectance due to cracking, associated to compressive stresses. Peel adhesion tests confirmed robust bonding of all ZrN coatings to the ABS substrates. These findings emphasize the key role of plasma etching in enhancing both the adhesion strength and the visual appeal of ZrN coatings on ABS substrates. By optimizing etching parameters, it is possible to achieve coatings with superior aesthetic qualities, such as a desirable golden tone and smooth finishes. This makes ZrN-coated ABS substrates highly promising for decorative applications in the automotive industry.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"64 ","pages":"Article 106403"},"PeriodicalIF":5.7,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Noncovalently functionalized hexagonal boron nitride nanosheets of poly(m-aminophenol) by enhanced corrosion protection of epoxy coating","authors":"Yahui Fen,&nbsp;Jian Han,&nbsp;Kaili Liu,&nbsp;Liang Ren,&nbsp;Huixin Zhang,&nbsp;Jianxin Chen","doi":"10.1016/j.surfin.2025.106391","DOIUrl":"10.1016/j.surfin.2025.106391","url":null,"abstract":"<div><div>The incorporation of nanomaterials into epoxy coatings can significantly enhance their barrier properties. Hexagonal boron nitride (h-BN) demonstrates considerable potential for application in prevention of metal corrosion due to its excellent electrical insulation and outstanding barrier characteristics. However, the h-BN has been observed to exhibit poor dispersion within epoxy resin. In this study, h-BN/PmAP were prepared by non-covalent functionalization of h-BN nanosheets with PmAP in order to strengthen the coating corrosion protection. The coating containing 1 wt% h-BN/PmAP-10 showed a notable enhancement in long-term corrosion protection. 25 days of immersion in 3.5 wt% NaCl later, the modulus value (|Z|_0.01 _Hz) of h-BN/PmAP-10/EP was maintained at 1.60 × 10⁷ Ω.cm², which is two orders of magnitude than that of the pure epoxy resin (1.28 × 10⁵ Ω.cm²). And from the Tafel plot of h-BN/PmAP-10/EP, the corrosion current is (I_corr = 4.68 × 10^-¹⁰ A/cm²) nearly three orders of magnitude lower than that of pure epoxy resin (I_corr = 1.30 × 10^-⁷ A/cm²). The main mechanism underlying these improvements is attributed to the enhanced dispersion of h-BN/PmAP-10 in the coating, which improves the densification of the coating and creates a ‘labyrinth effect’. It also retains the corrosion inhibition ability of PmAP, this helps the coating to resist corrosion.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"65 ","pages":"Article 106391"},"PeriodicalIF":5.7,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847747","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":"Understanding microplastic flotation through microbubble-microplastic interactions","authors":"Abraham Matthews Joshua,&nbsp;Puteri Arisya Diana Aznir,&nbsp;Ee Von Lau","doi":"10.1016/j.surfin.2025.106399","DOIUrl":"10.1016/j.surfin.2025.106399","url":null,"abstract":"<div><div>Microplastic pollution significantly impacts aquatic environment, necessitating effective remediation strategies. Understanding microplastic-microbubble attachment mechanisms is crucial for developing efficient flotation-based removal methods. This study investigates the bubble attachment behaviour of two common microplastics; polyethylene (PE) and polystyrene (PS), across sodium chloride (NaCl) concentrations from 1 mM to 1000 mM. Probability of attachment, Gibbs free energy and adhesion force were analysed to understand their interactions. Results indicate that PE exhibits a higher attachment tendency than PS, particularly at low NaCl concentrations, as evidenced by contact angle measurements and Gibbs free energy. This suggests stronger hydrophobic interactions and surface property influences at low NaCl concentrations. However, the Gibbs free energy difference between PE and PS decreases with increasing NaCl concentration. Adhesion force analysis further reveals that PE consistently shows stronger adhesion than PS, with instant attachment observed at 50 mM and above. At NaCl concentrations above 500 mM, both microplastics display similar Gibbs free energy (∼ -58 mJ/m²), highlighting the dominance of ionic strength in bubble-particle attachment. Laboratory-scale flotation tests confirm improved recovery rates, increasing from 86.7 % to 91.5 % for PE, and from 83.8 % to 92.1 % for PS. These findings underscore the role of high NaCl concentrations in enhancing flotation-based microplastic recovery.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"64 ","pages":"Article 106399"},"PeriodicalIF":5.7,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Effect of the Spraying Process on Corrosion Resistance and Durability of Al-5Mg Coating on Carbon Steel: A Comparison of Transferred Arc Plasma Spraying and Flame Spraying Methods","authors":"Qidi Wang ,&nbsp;Shigenobu Kainuma ,&nbsp;Yingrui Ju ,&nbsp;Aran Kim ,&nbsp;Tomoaki Nishitani","doi":"10.1016/j.surfin.2025.106377","DOIUrl":"10.1016/j.surfin.2025.106377","url":null,"abstract":"<div><div>This study investigated the corrosion resistance and durability of Al-5Mg coatings deposited by transferred arc plasma spraying (TAPS) and flame spraying (FS) methods. The corrosion performance was evaluated through a 6000-hour accelerated corrosion test, complemented by electrochemical impedance spectroscopy and polarization measurements. The TAPS coating exhibited significantly lower initial porosity of 3.78%, reducing further to 1.09% after 1000 corrosion cycles, compared to the FS coating with an initial porosity of 9.93%, decreasing to 5.46%. Electrochemical tests revealed a lower corrosion current density in the TAPS coating (1.90 μA/cm²) than in the FS coating (2.54 μA/cm²) after 1000 cycles, indicating a superior corrosion resistance of the TAPS coating. Additionally, adhesion strength measurements indicated that the TAPS coating exhibited approximately 20% higher adhesion strength compared to the FS coating, further enhancing its durability and mechanical reliability. The enhanced performance of TAPS is attributed primarily to its dense and uniform pore structure and the resultant formation of a compact, protective oxide passive layer, effectively inhibiting electrolyte penetration. Overlay tests further confirmed that TAPS coatings exhibited significantly reduced blistering under linear defect conditions. These findings suggest that the TAPS process is a highly effective method for enhancing the corrosion protection of Al-5Mg coatings on complex steel structures.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"64 ","pages":"Article 106377"},"PeriodicalIF":5.7,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143798996","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":"Influence of water background pressure on removal rates of SiO2, Si and photo resist in reactive ion beam etching","authors":"Peter Birtel,&nbsp;Erik Rohkamm,&nbsp;Jens Bauer,&nbsp;Frank Frost","doi":"10.1016/j.surfin.2025.106306","DOIUrl":"10.1016/j.surfin.2025.106306","url":null,"abstract":"<div><div>Process stability and reproducibility are indispensable for the high-precision production of optical components using reactive ion beam etching. The influence of residual water on the etching mechanism of SiO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>, Si and a photo resist has been investigated using the feed gas mixture of CHF<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> and O<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> with a radio-frequency broad beam ion source. Removal rates were determined for all materials at different water background pressures and etching yields were calculated using current density measurements of the ion beam. The composition of the reactive ion beam was investigated at three water background pressures using energy selective mass spectrometry. The composition of the near-surface was analyzed using two complementary techniques: time-of-flight mass spectrometry and X-ray photoelectron spectroscopy. A steady state oxygen-containing hydrocarbon and Si(OF) layer is found to form during reactive ion beam processing. A correlation is identified with the ion beam composition, whereby the composition and thickness of this layer is dependent on the water background pressure. Consequently, the etching yields and selectivities for the investigated materials are systematically altered. The technological consequences for reactive ion beam etching are discussed.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"64 ","pages":"Article 106306"},"PeriodicalIF":5.7,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Delafloxacin and Mercury adsorption via a triple-layered metallic hydroxide nanocomposite: Insights into the adsorption mechanism, sustainability, and eco-friendliness studies","authors":"Samar M. Mahgoub ,&nbsp;Abdullah S. Alawam ,&nbsp;Hassan A. Rudayni ,&nbsp;Ahmed A. Allam ,&nbsp;Abdelatty M. Radalla ,&nbsp;Doaa Abdel Tawab ,&nbsp;Rehab Mahmoud","doi":"10.1016/j.surfin.2025.106360","DOIUrl":"10.1016/j.surfin.2025.106360","url":null,"abstract":"<div><div>A triple-layered metallic hydroxide nano-sorbent was synthesized and employed as an eco-friendly and highly efficient adsorbent for the removal of Delafloxacin (DFX) antibiotic and Mercury (MC) from polluted aqueous solutions. The physicochemical characteristics of the synthesized adsorbent were thoroughly examined using various analytical techniques, including FTIR, XRD, FESEM/EDX, TGA/DTG, BET surface area analysis, zeta potential measurement, chemical stability, and particle size distribution analysis. The effects of various parameters, including pH, temperature, adsorbent dosage, and contact time, on the efficiency of MC and DFX removal were systematically investigated. The optimized parameters for MC adsorption were pH = 5, temperature = 25 °C, adsorbent dosage = 0.07 mg, and contact time = 30 min. For DFX uptake, the adjusted parameters were pH = 5, temperature = 25 °C, adsorbent dosage = 0.2 mg, and contact time = 60 min. Both the pseudo-first-order (PFO, R² = 0.99) and pseudo-second-order (PSO, R² = 0.99) models, along with the Freundlich (R² = 0.99, χ² = 2.77) isotherm model, were identified as the most suitable kinetic and isotherm models for analyzing the adsorption process of MC. In contrast, the removal mechanism of DFX was best described by the PFO model (R² = 0.99) and the Langmuir model (R² = 1, χ² = 2.15). Furthermore, an advanced statistical monolayer model was performed to clarify the removal mechanism of these pollutants, focusing on the orientation of the adsorbed molecules and the microscopic interactions occurring on the adsorbent surface. The extent of MC cations and DFX drug molecules adsorbed per functional group (n) in this nanocomposite was found to be 0.724 and 0.445, respectively. This indicates that the adsorption orientations are both parallel and non-parallel, resulting in multi-docking and multi-molecular interactions with MC cations, as well as horizontal alignment and multi-docking interactions with DFX molecules. The maximum removal capacities (Qsat) for MC and DFX were determined to be 35.79 mg/g and 429.11 mg/g, respectively. Thermodynamic studies were conducted at temperatures ranging from 25 to 55 °C for both pollutants, revealing that the interactions in both adsorption systems are endothermic. This nano-sorbent was effectively regenerated using various solvents, allowing for its reuse. The preparation process achieved an impressive BAGI ranking of 90.6, highlighting its exceptional practical applicability, strong production capabilities, potential for automation, and low operating costs. In summary, the findings of this study indicate that the triple -layered metallic hydroxide exhibits promising performance as a highly efficient, safe, low-cost, and eco-friendly adsorbent for the removal of pharmaceuticals and heavy metals from contaminated water.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"64 ","pages":"Article 106360"},"PeriodicalIF":5.7,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808491","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":"Unveiling the durability, friction, and wear behaviour of nanodiamond composite films deposited on biased cemented carbide with varying Al interlayer thickness","authors":"Mohamed Ragab Diab ,&nbsp;Koki Murasawa ,&nbsp;Mei Wang ,&nbsp;Shinya Ohmagari ,&nbsp;Hiroshi Naragino ,&nbsp;Tsuyoshi Yoshitake ,&nbsp;Mohamed Egiza","doi":"10.1016/j.surfin.2025.106367","DOIUrl":"10.1016/j.surfin.2025.106367","url":null,"abstract":"<div><div>Nanodiamond composite (NDC) films were deposited on biased cemented carbide (WC−6 wt. % Co) substrates using a coaxial arc plasma deposition technique, incorporating sputtered aluminium (Al) interlayers with varying thicknesses (0,50, 100, 300, and 500 nm). This study systematically investigates the durability, friction, and wear behaviour of NDC films, focusing on optimizing Al interlayer thickness to enhance performance in dry and harsh machining conditions. The primary objective was to mitigate interfacial catalytic reactions, particularly Co-induced graphitization, which adversely affect adhesion and mechanical integrity. Experimental findings identified a 100 nm Al interlayer as the optimal configuration, forming a protective Al₂O₃ layer that effectively suppressed graphitization. This resulted in significant improvements in coating performance, including a 79 % increase in adhesion strength, as indicated by a critical load of 17 N for full spallation during scratch testing, and a 62 % enhancement in wear resistance, yielding a wear rate of 7.85 × 10⁻⁸ mm³/N.m. Simultaneously, the coefficient of friction (COF) decreased by 71 % compared to the uncoated substrate, maintaining a stable value of 0.09 during dry sliding tests against a rough Al₂O₃ counterpart. The exceptional tribological performance of the optimized NDC coatings is attributed to multiple factors. The refined nanostructure, featuring a dense grain boundary network, facilitated the formation of a lubricating graphitic layer, contributing to low and stable friction. Additionally, the high hardness (75 GPa) and Young's modulus (724 GPa) provided superior wear resistance and load-bearing capacity. These results underscore the potential of Al interlayers to significantly enhance the tribological performance of NDC coatings. However, the improvements in durability remain limited by the low adhesion strength, which remains a critical factor for cutting tools operating under dry machining conditions.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"63 ","pages":"Article 106367"},"PeriodicalIF":5.7,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Effect of exposing Se pre-implanted polycrystalline SiC to maximum electronic energy loss of 33.7 keV/nm and annealing","authors":"T.S. Mabelane ,&nbsp;Z.A.Y. Abdalla ,&nbsp;V.A. Skuratov ,&nbsp;S.S. Ntshangase ,&nbsp;S.C. Masikane ,&nbsp;T.T. Hlatshwayo","doi":"10.1016/j.surfin.2025.106376","DOIUrl":"10.1016/j.surfin.2025.106376","url":null,"abstract":"<div><div>In this work the effect of swift heavy ions (SHIs) (710 MeV Bi⁵¹⁺) irradiation and annealing on selenium (Se) pre-implanted silicon carbide (SiC) was investigated. SiC samples were implanted individually with 200 keV Se ions to a fluence of 1 × 10¹⁶ cm⁻² at both room temperature (RT) and 350 °C. Following this, some pre-implanted samples were irradiated at RT with 710 MeV Bi⁵¹⁺ ions to a fluence of 1 × 10¹³ cm⁻². These irradiated samples then underwent sequential annealing at temperatures ranging from 1000 to 1200 °C, in 100 °C increments, for 10 h. The samples were characterized using Raman, SEM, TEM, and RBS. Sequential annealing of the RT pre-implanted and then irradiated sample up to 1200 °C led to recrystallization of the highly defective SiC layer into strained nano-crystalline SiC with cavities, accompanied by the formation of Se precipitates. In contrast, sequential annealing of the 350 °C pre-implanted and then irradiated sample up to 1200 °C also caused recrystallization of the defective SiC layer into nano-crystalline SiC, but with minor strained regions. No loss or migration of Se was detected in either the RT or 350 °C pre-implanted samples following SHIs irradiation and annealing up to 1200 °C.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"64 ","pages":"Article 106376"},"PeriodicalIF":5.7,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Synergetic SEIRA sensing and catalytic performance of Au nanostars embedded onto dielectric silica spheres","authors":"Suraj Tamta,&nbsp;Gaurav Jalendra,&nbsp;P. Senthil Kumar","doi":"10.1016/j.surfin.2025.106378","DOIUrl":"10.1016/j.surfin.2025.106378","url":null,"abstract":"<div><div>Light-matter interaction involving metal nanoparticles promotes sensing applications like surface-enhanced infrared absorption (SEIRA) and surface-enhanced Raman scattering (SERS), tuned over the entire visible frequency range utilizing the dielectric constant of the surrounding medium. Based on this simple yet significant aspect, we envisage core-shell nanostructures having a dielectric core and metal shell, reaping the benefit of diverse functionalities rolled in one single nanostructure. We indigenously develop an effective single-step synthesis protocol for fabricating silica spheres embedded with Au nanostars and vice versa in a seamless manner, validated through careful analytical and microscopic signatures. We also examine these metastructures using FDTD (finite difference time domain) simulation corroborated with the experimental data, visually representing the near-field enhancement effects in an effortless manner. SEIRA measurements essentially assess the invariably enhanced sensing of respective dyes, bromophenol (BP) and crystal violet, on the surface of our core-shell structures, both in their individual as well as mixed states, harnessing the highest selective dye enhancement to the best of knowledge. Additionally, Au nanostar-decorated silica spheres monitor the dye degradation at the molecular level through FTIR vibrational data analysis. Our present results elucidate synergistic effects between dielectric core and anisotropic-shaped metal shells, illustrating enhanced optical properties and catalytic functionalities, holding promise for advanced sensing platforms with improved performance and versatility.</div></div>","PeriodicalId":22081,"journal":{"name":"Surfaces and Interfaces","volume":"64 ","pages":"Article 106378"},"PeriodicalIF":5.7,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799244","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}