Applied Surface Science Advances最新文献

{"title":"One-step mass-production of CeO2 nanoparticles embedded in free-standing porous carbon as haloperoxidase mimetic coating to combat biofouling on steel surface","authors":"Chao Zhao ,&nbsp;Xinyu Wu ,&nbsp;Tianqi Cheng ,&nbsp;Tsz Yeung Yip ,&nbsp;Bo Yuan ,&nbsp;Wanqing Dai ,&nbsp;Shengpei Zhang ,&nbsp;Yuwei Qiu ,&nbsp;Jian Lin Chen ,&nbsp;Shang-Wei Chou ,&nbsp;Yung-Kang Peng","doi":"10.1016/j.apsadv.2024.100670","DOIUrl":"10.1016/j.apsadv.2024.100670","url":null,"abstract":"<div><div>Marine biofouling poses significant challenges for maritime industries, leading to increased maintenance costs and ecological disturbances. While Cu-based biocide coatings are effective in combating biofouling, they raise environmental concerns and have limited lifespans. This has spurred interest in sustainable alternatives inspired by marine organisms, such as haloperoxidases (HPOs) found in certain algae, which can convert H₂O₂ and Br⁻ in seawater into HOBr to mitigate biofouling. However, the practical implementation of HPOs is limited by their stability and cost. Nanozymes like CeO₂ have emerged as promising alternatives; however, conventional coating methods—typically involving the replacement of Cu-based biocides with CeO₂ nanoparticles (NPs) in resin—restrict their exposure to H₂O₂ and Br⁻, resulting in significant activity loss. This study presents a simple method for mass-producing CeO₂ NPs embedded in free-standing porous carbon as HPO mimetics. The optimized sample demonstrates exceptional HPO-like activity and antibacterial performance. Most importantly, we have shown that these HPO mimetics can be directly grown on steel surfaces during preparation, eliminating the need for a dispersant. This direct coating technique effectively addresses the challenges associated with conventional resin method, facilitating the development of a sustainable antibacterial and antifouling coating with preserved activity.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"25 ","pages":"Article 100670"},"PeriodicalIF":7.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143183268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel source/drain contact structure for a-IGZO devices: Oxygen-scavenger-layer metal-interlayer-semiconductor (OSL MIS) approach","authors":"Sungjoo Song ,&nbsp;Jong-Hyun Kim ,&nbsp;Jongyoun Park ,&nbsp;Seung-Hwan Kim ,&nbsp;Dongjin Ko ,&nbsp;Hyejung Choi ,&nbsp;Seiyon Kim ,&nbsp;Hyun-Yong Yu","doi":"10.1016/j.apsadv.2024.100676","DOIUrl":"10.1016/j.apsadv.2024.100676","url":null,"abstract":"<div><div>The engineering of Schottky barrier height (SBH) at source/drain (S/D) contacts is a crucial technology in the next generation nanoelectronics. Recently, amorphous indium gallium zinc oxide (a-IGZO) has gained prominence for its application to stackable 3-dimensional (3D) dynamic random-access memory (DRAM) due to its ultra-low off-current and low-temperature fabrication. However, a high contact resistance of a-IGZO still limits the device performance. Despite various attempts to address the high contact resistance issue, including the metal-interlayer-semiconductor (MIS) contact structure, a novel approach is needed. Here, we propose an oxygen-scavenger-layer MIS (OSL MIS) contact structure which employs oxygen areal density (OAD) modulated OSL as the interlayer. The OSL MIS has been shown to improve the contact resistance through three key effects. 1) The interlayer doping effect, 2) a diffusion of oxygen ions from a-IGZO to interlayer, generates shallow donors in a-IGZO, and 3) the movement of oxygen ion induces the interface dipole. With these effects, the effective SBH and a contact resistivity were reduced to 0.119 eV and 1.36E-5 Ω·cm^2, respectively. The proposed OSL MIS contact structure of a-IGZO using OAD modulation technique, shows enormous potential in improving the performance of amorphous oxide semiconductor based advanced electronic devices.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"25 ","pages":"Article 100676"},"PeriodicalIF":7.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143183292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dependency of solid particle erosion behaviour of plasma sprayed NiTi coating on primary gas flow rate","authors":"B. Swain ,&nbsp;S. Mantry ,&nbsp;S.S. Mohapatra ,&nbsp;P. Mallick ,&nbsp;A. Behera","doi":"10.1016/j.apsadv.2024.100681","DOIUrl":"10.1016/j.apsadv.2024.100681","url":null,"abstract":"<div><div>Solid particle erosion is a major concern for the current generation aerospace industries. To reduce the effect of solid particle erosion on the aerospace engine parts, an NiTi coating has been developed by atmospheric plasma spray technology in the current investigation. Furthermore, the dependency of the solid particle erosion property on the primary gas flow rate of plasma spray coating has also been investigated. For this purpose, plasma spray coatings of NiTi alloy have been developed at different primary gas flow rates and various physical and mechanical properties have been evaluated. A correlation between the physical and mechanical properties of the coating with the solid particle erosion wear has been performed. Various phases have been obtained from the X-ray diffraction analysis such as NiTi-B2, Ni, Ti, Ni₃Ti, Ti₂Ni, NiO, TiO and Ni₄Ti₃, which also have been confirmed by energy dispersive spectroscopy method. From the microstructural investigation, various surface and interface defects such as unmelted particle formation, pores, microcracks, splat delamination etc. have been observed at the coatings developed at low primary gas flow rate and homogeneous splats have been observed from the coatings developed at higher primary gas flow rate. The coating developed at 40 lpm primary gas flow rate revealed the optimum properties like adhesion strength, microhardness, porosity, surface roughness etc. Erosion rate of the plasma sprayed NiTi coatings has been affected significantly by the coating's physical and mechanical properties. It has been revealed from the current investigation that the coating obtained from 40 lpm primary gas flow rate has less erosion rate as compared to others. Various erosion mechanisms such as groove formation, scratches, cutting, plastic deformation etc. has been observed from the microstructural analysis of the eroded samples at 45˚ impingement angle and splat fragmentation, splat delamination form the 90˚ impingement angle.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"25 ","pages":"Article 100681"},"PeriodicalIF":7.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143183267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced Stability of Gr, h-BN and Gr/h-BN protected MoS2 flakes under laser illumination","authors":"Chak-Ming Liu ,&nbsp;Sheng-Yu Hsu ,&nbsp;Hsin-Sung Chen ,&nbsp;Chuan-Che Hsu ,&nbsp;Yann-Wen Lan ,&nbsp;Hsiang-Chih Chiu ,&nbsp;Wen-Chin Lin","doi":"10.1016/j.apsadv.2024.100687","DOIUrl":"10.1016/j.apsadv.2024.100687","url":null,"abstract":"<div><div>The optical excitation and applications of molybdenum disulfide (MoS₂) is critical due to its limited thickness and susceptibility to damage from high-intensity laser illumination, which can cause significant local heating and structural degradation. To mitigate this issue, protective layers made from materials with high thermal conductivity and transparency, such as graphene (Gr), hexagonal boron nitride (h-BN), and Gr/h-BN heterostructure, have been explored. This study utilizes Raman and photoluminescence (PL) spectroscopy to assess the stability of both bare MoS₂ flakes and MoS₂ flakes covered with different protecting layers under varying laser power levels. When exposed to 13 mW/μm² laser for 30 min, bare MoS₂ undergoes considerable structural degradation, characterized by the formation of protrusions and a reduction in the Raman signal to just 10 % of its original intensity. In contrast, the Gr/MoS₂ heterostructure maintains the stability of both the Raman fingerprint peaks and PL intensity, with only a 0–15 % decrease. The h-BN/MoS₂ system also shows improved stability, with the Raman signal decreasing to around 30 % of its initial intensity. Gr/h-BN/MoS₂ exhibits similar stability to Gr/MoS₂. These findings indicate that the Gr/MoS₂ system provides the highest stability under laser illumination, followed by the Gr/h-BN/MoS₂ system and the h-BN/MoS₂ system, while bare MoS₂ demonstrates the lowest stability. The combined effects of efficient thermal dissipation and isolation from ambient oxygen offer significant protection to MoS₂ under high-power illumination.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"25 ","pages":"Article 100687"},"PeriodicalIF":7.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143183406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of fiber engraving laser on metallurgical, surface topography, and corrosion properties of AZ80 magnesium-based alloy","authors":"Narges Ahmadi ,&nbsp;Homam Naffakh-Moosavy ,&nbsp;Seyed Mohammad Mahdi Hadavi ,&nbsp;Fatemeh Bagheri","doi":"10.1016/j.apsadv.2025.100695","DOIUrl":"10.1016/j.apsadv.2025.100695","url":null,"abstract":"<div><div>Surface modification with fiber lasers improves the biological and mechanical properties of biomaterials. Magnesium, a lightweight metal similar to natural bone, shows no toxicity and can aid in hard tissue recovery when implanted in the human body. However, its main drawback is its fast degradation rate in medical applications. Current research aims to study the effect of fiber lasers on the surface properties, metallurgical characteristics, and corrosion behavior of AZ80 magnesium-based alloy. The XRD and hardness test findings from the laser process show that some secondary phases have dissolved in the matrix, while others remain unchanged. The microhardness result for sample 4 indicated an increase to 120 HV with a loading force of 9.8 N at a holding time of 10 s. The roughness test showed a decrease from 10±0.54 µm for the AZ80 sample to 3.27±0.45 µm for sample 5. The results of the wettability test showed that the water contact angle increased from 55.1 ± 1.5° for AZ80 to 129 ± 4.3° for sample 3. The results of the polarization test showed changes in Ecorr from -1.55 mV to -1.63 mV and a shift in Icorr from 0.26 mA/cm² to 0.16 mA/cm². Sample 3 had three times higher resistance (R2 = 1710 Ω.cm²) compared to the laser-treated samples and AZ80 (R2 = 540.1 Ω.cm²). Laser-treated samples showed lower corrosion rates than untreated samples, thanks to a more uniform melted surface layer, lower roughness, and higher water contact angle. This method could enhance the corrosion resistance of the Mg-based AZ80 alloy in biomedical applications.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"25 ","pages":"Article 100695"},"PeriodicalIF":7.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143183405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preface on Hot Topics in Surface Science: Organic Coatings (HTSS-OC)","authors":"Ayse Asatekin ,&nbsp;Louis C.P.M. de Smet","doi":"10.1016/j.apsadv.2024.100678","DOIUrl":"10.1016/j.apsadv.2024.100678","url":null,"abstract":"","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"25 ","pages":"Article 100678"},"PeriodicalIF":7.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143183412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comparative study on spin-to-charge and charge-to-spin conversion using modulated Dirac surface states of Bi2Se3","authors":"Youngmin Lee ,&nbsp;Jonghoon Kim ,&nbsp;Seungwon Rho ,&nbsp;Seok-Bo Hong ,&nbsp;Hyeongmun Kim ,&nbsp;Jaehan Park ,&nbsp;Dajung Kim ,&nbsp;Chul Kang ,&nbsp;Myung-Ho Bae ,&nbsp;Mann-Ho Cho","doi":"10.1016/j.apsadv.2025.100693","DOIUrl":"10.1016/j.apsadv.2025.100693","url":null,"abstract":"<div><div>Understanding the mechanisms of spin-charge interconversion is a major challenge in modern spintronics. In this study, we investigate the complex charge-to-spin conversion (CSC) and spin-to-charge conversion (SCC) using the modulated Dirac surface state of Bi₂Se₃ thin films. The role of Bi₂Se₃, which possesses a spin-momentum locked Dirac surface state (DSS), in the CSC and SCC processes is explored using spin-torque ferromagnetic resonance (ST-FMR) and terahertz emission methods, respectively. Distinct differences in spin Hall angles are observed in ultrathin Bi₂Se₃ films on HfO_2-x, compared to those on a typical substrate, indicating the dependence on the spin-orbit interaction. Specifically, the interaction of d-orbital of the unbound hafnium in HfO_2-x and Bi₂Se₃ enhances the spin-orbit interaction. In addition, we found that the complex interaction between the surface and bulk states affects the spin diffusion length and the spin current injection region. The influence of the surface state on the conversion processes decreases as the Bi₂Se₃ film thickness increases, resulting in differing efficiency for SCC and CSC due to the asymmetrical stack structure. The findings using Bi₂Se₃ ultrathin films enhance our understanding of DSS-related CSC and SCC mechanisms, paving the way for performance optimization of future spintronic devices.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"25 ","pages":"Article 100693"},"PeriodicalIF":7.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Atmospheric pressure plasma synthesis of adaptable coatings based on castor oil urethane dimethacrylate and their properties","authors":"Eusebiu-Rosini Ionita ,&nbsp;Maria-Daniela Ionita ,&nbsp;Antoniu Moldovan ,&nbsp;Cristina Surdu-Bob ,&nbsp;Violeta Melinte ,&nbsp;Andreea L. Chibac-Scutaru ,&nbsp;Andrada Lazea-Stoyanova","doi":"10.1016/j.apsadv.2024.100680","DOIUrl":"10.1016/j.apsadv.2024.100680","url":null,"abstract":"<div><div>Urethane-dimethacrylate polymers are generated using light energy, in the presence of photoinitiators, and are the choice materials for many composite materials, biomaterials, optical materials or coatings. In this study, we present an alternative, new, synthesis method for castor oil polymethacrylate (CO-PMA) films by exposure of a liquid precursor (namely castor oil urethane dimethacrylate (CO-UDMA)) to a non-thermal atmospheric pressure cylindrical plasma source. This is a photoinitiator free process, an open-air atmosphere technique and uses a single plasma polymerization step. We have obtained polymeric layers in two modes, in stationary or dynamic plasma exposure mode. The experimental results show that our plasma method is suitable to generate compact polymeric layers, with no trapped unpolymerized precursor, showing a bumpy or microscale ripples surface appearance. However, the surface and cross-section analyses indicate that the dynamic layer has a nanometric flat surface, a more pronounced hydrophobic character and is thicker. In short, our plasma-based method for generation of CO-PMA layers, in dynamic mode, does not require toxic photoinitiators, is simple, can be applied to temperature-sensitive materials and is scalable to large areas.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"25 ","pages":"Article 100680"},"PeriodicalIF":7.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Plasma-polymerized fluorocarbon Ag–Cu nanocomposites: Nanostructure optimization for superior SERS sensitivity","authors":"Joonhyuk Lee ,&nbsp;Sung Hyun Kim ,&nbsp;Seok-Kyun Son ,&nbsp;Sang-Jin Lee","doi":"10.1016/j.apsadv.2024.100690","DOIUrl":"10.1016/j.apsadv.2024.100690","url":null,"abstract":"<div><div>Surface-enhanced Raman spectroscopy (SERS) enables the precise identification of molecules by enhancing the Raman signals of target compounds. This enhancement relies on the presence of Raman-active molecules on suitable nanostructures, where local surface plasmon resonance creates electromagnetic hotspots. This paper proposes a method to finely control the distribution of Ag and Cu nanoparticles within a plasma–polymer–fluorocarbon (PPFC) thin film by adjusting the sputtering power density to improve SERS performance. We fabricated Ag–Cu nanocomposite PPFC (CAP) thin films by sputtering at different mid-range-frequency sputtering densities, resulting in variations in the optical absorption wavelengths and changes in the Ag/Cu ratio, as confirmed by an X-ray photoelectron spectroscopy analysis. SERS measurements using rhodamine 6G demonstrated an enhancement factor (EF) of up to 10⁸, further supported by finite-difference time-domain simulations based on nanostructures characterized by atomic force microscopy. We applied the prepared CAP thin films to contaminated surfaces and assessed their ability to enhance Raman signals for point-of-care detection. Despite a reduced EF due to the absorption of the thick polyethylene terephthalate substrate, the films generated identifiable Raman signals. This work highlights the potential of CAP thin films in creating flexible, tightly integrated, and highly sensitive SERS-active substrates.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"25 ","pages":"Article 100690"},"PeriodicalIF":7.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adhesion-induced MoS2 layer transfer via in-situ TEM-nanoindentation: Effects of curvature and substrate mediated residual stress","authors":"Jhih H. Liang ,&nbsp;Mehdi Rouhani ,&nbsp;J. David Schall ,&nbsp;Takaaki Sato ,&nbsp;Christopher Muratore ,&nbsp;Nicholas R. Glavin ,&nbsp;Robert W. Carpick ,&nbsp;Yeau-Ren Jeng","doi":"10.1016/j.apsadv.2024.100686","DOIUrl":"10.1016/j.apsadv.2024.100686","url":null,"abstract":"<div><div>Molybdenum disulfide (MoS₂) holds great potential in a wide range of applications, including electronics, photodetectors, light-emitting diodes (LEDs), and solar cells due to its unique two-dimensional (2D) structure. This structure enables innovative functionalities, particularly in flexible and wearable technologies. However, a significant knowledge gap remains regarding MoS₂'s interfacial adhesion, a critical aspect for advancing next-generation devices. To address this, we conducted a comprehensive study investigating the interaction forces originating from the bonding between atoms that govern the adhesion of ultra-thin 2D MoS₂. Our pioneering in situ experiments, utilizing TEM-based nanoindentation, provided precise imaging and force monitoring of MoS₂'s interaction with a diamond. We employed four MoS₂-coated AFM tips with varying radii and preparation methods, with films prepared on two Si wafers subjected to different oxidation protocols. Our findings, validated by Raman and X-ray photoelectron spectroscopy, reveal unique insights into MoS₂'s interfacial behavior. We observed a decreased structural order in MoS₂ on sharper tips, particularly those without pre-deposition oxidation. These results underscore the importance of residual stress between the MoS₂ film and substrate and the influence of curvature-induced residual stress in fostering less-ordered MoS₂ structures with heightened work of adhesion. Importantly, this is the first study to report the work of adhesion for MoS₂-diamond contact. Our findings highlight the crucial role of covalent bonding at contact points in the material transfer processes involving 2D materials. This is a critical insight for developing precise and reliable methods for manipulating 2D materials, which could significantly advance our understanding and application of materials science, particularly in nanotechnology and device fabrication.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"25 ","pages":"Article 100686"},"PeriodicalIF":7.5,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}