Applied Surface Science Advances最新文献_第4页

On the adhesion of a-C:H coatings deposited by PECVD on PDMS for biomedical applications PECVD沉积a-C:H涂层在PDMS上的粘附性研究

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-03-01 Epub Date: 2026-02-18 DOI: 10.1016/j.apsadv.2026.100949

L. Astrid Yáñez-Hernández , Pascale Chevallier , Linda Bonilla-Gameros , Charlotte Rossi , Laurent Houssiau , Andranik Sarkissian , Diego Mantovani

Polydimethylsiloxane (PDMS) is widely used in biomedical devices. Despite its well-recognized hemocompatibility, elasticity, and overall stability, it remains prone to bacterial colonization, which can lead to severe infections and even to device failure. Hydrogenated amorphous carbon (a-C:H) coatings have emerged as a versatile route to enhance biomaterial surfaces, and can serve as platforms for the controlled release of antibacterial agents. However, adhesion of a-C:H coatings to soft polymers such as PDMS remains a critical bottleneck limiting clinical success. This study investigates how substrate bias and hydrogen incorporation during plasma-enhanced chemical vapor deposition affect adhesion, morphology, and interface integrity of a-C:H coatings on PDMS. Coatings deposited without bias were termed polymer-like carbon (PLC), and those deposited at −300 V as diamond-like carbon (DLC). The incorporation of hydrogen during deposition produced the hydrogenated counterparts, PLCH (non-biased + H₂) and DLCH (biased + H₂). Time-of-flight secondary ion mass spectrometry (ToF-SIMS) depth profiling revealed thicker coatings and sharper interfaces for non-biased coatings. In contrast, biased coatings were thinner and showed evidence of intermixing with substrate components. Regarding hydrogen incorporation, a decrease in coating thickness and surface roughness was observed, as well as a 65.5 % reduction in crack density comparing PLC and PLCH after tensile deformation. Furthermore, immersion tests under pseudo-physiological conditions demonstrated that PLCH remained stable for 21 days, with only localized cracks and no significant delamination under either static or dynamic conditions. These results suggest that these coatings can withstand physiological stresses while maintaining mechanical integrity. Therefore, among the variants studied, PLCH emerges as the most promising coating for flexible PDMS-based biomedical devices, offering an optimal balance of thickness, adhesion, flexibility, and chemical durability.

聚二甲基硅氧烷（PDMS）广泛应用于生物医学设备。尽管它具有公认的血液相容性、弹性和整体稳定性，但它仍然容易被细菌定植，这可能导致严重的感染甚至设备故障。氢化无定形碳（a- c:H）涂层已经成为增强生物材料表面的通用途径，并且可以作为抗菌药物控制释放的平台。然而，a- c:H涂层与软聚合物（如PDMS）的粘附性仍然是限制临床成功的关键瓶颈。本研究研究了等离子体增强化学气相沉积过程中衬底偏压和氢的结合如何影响PDMS上a-C:H涂层的附着力、形貌和界面完整性。无偏压沉积的涂层称为类聚合物碳（PLC），而在- 300 V下沉积的涂层称为类金刚石碳（DLC）。在沉积过程中，氢的掺入产生了氢化的对应物，PLCH（非偏置+ H₂）和DLCH（偏置+ H₂）。飞行时间二次离子质谱（ToF-SIMS）深度分析显示，无偏置涂层的涂层更厚，界面更清晰。相比之下，偏置涂层更薄，并显示出与基材组分混合的证据。在拉伸变形后，与PLC和PLCH相比，含氢涂层厚度和表面粗糙度降低，裂纹密度降低65.5%。此外，在假生理条件下的浸泡试验表明，PLCH在静态或动态条件下保持稳定21天，只有局部裂缝，没有明显的分层。这些结果表明，这些涂层可以承受生理应力，同时保持机械完整性。因此，在所研究的变体中，PLCH成为柔性pdm生物医学设备中最有前途的涂层，提供了厚度，附着力，柔韧性和化学耐久性的最佳平衡。

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引用次数: 0

Structural, electronic, and chemical manifestations of weak molecule–substrate coupling on Bi2Se3 compared with Ag, Au, and graphene 与Ag、Au和石墨烯相比，Bi2Se3上弱分子-衬底耦合的结构、电子和化学表现

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-03-01 Epub Date: 2026-01-07 DOI: 10.1016/j.apsadv.2025.100927

Jan Čechal , Veronika Stará , Anna Kurowská , Matthias Blatnik , Daniel Pravec , Daniela Hrubá , Jan Kunc , Čestmír Drašar , Jakub Planer , Pavel Procházka

Modifying topological insulator (TI) surfaces with metal-organic layers offers a pathway to a material that displays the quantum anomalous Hall effect. However, knowledge of the molecular nanoarchitectonics on weakly interacting TI surfaces remains limited, which hinders the experimental realization of organic layers with the required properties. Here, we combine low-energy electron microscopy and diffraction, STM, XPS, and DFT calculations to investigate the adsorption of 4,4’-biphenyl-dicarboxylic acid (BDA) on the Bi₂Se₃(0001) and compare it with Ag(100), Ag(111), Au(111), and graphene substrates. We identify four manifestations of weak molecule–substrate coupling: (i) Upon deposition, the BDA molecule stays intact and is physisorbed. (ii) The intact nature of BDA is preserved at elevated temperatures. (iii) The electronic energy levels of BDA are decoupled from substrate polarization effects. (iv) There is a weak positional preference of the BDA molecular phase with respect to the substrate. Bi₂Se₃ exhibits uniquely weak structural, electronic, and chemical interactions with BDA, meeting all these points, whereas the other substrates fail to meet one or several of these points. These insights provide a quantitative framework for understanding weak molecule–substrate coupling across a range of 2D materials and metallic surfaces, informing the design of molecular architectures on non-metallic substrates for quantum and functional nanomaterials with potential applications in quantum nanoelectronics.

用金属有机层修饰拓扑绝缘体（TI）表面提供了一种显示量子反常霍尔效应的材料的途径。然而，对弱相互作用TI表面的分子纳米结构的了解仍然有限，这阻碍了具有所需性能的有机层的实验实现。在这里，我们结合了低能电子显微镜和衍射，STM， XPS和DFT计算来研究4,4 ' -联苯-二羧酸（BDA）在Bi2Se3（0001）上的吸附，并将其与Ag(100), Ag(111), Au（111）和石墨烯衬底进行比较。我们确定了弱分子-底物耦合的四种表现：(i)沉积后，BDA分子保持完整并被物理吸附。（ii） BDA的完整性质在高温下得以保存。（iii） BDA的电子能级与衬底极化效应解耦。（iv） BDA分子相相对于底物有弱的位置偏好。Bi2Se3与BDA表现出独特的弱结构、电子和化学相互作用，满足所有这些要求，而其他底物则不能满足其中一个或几个要求。这些见解为理解一系列二维材料和金属表面的弱分子-衬底耦合提供了定量框架，为量子和功能纳米材料在非金属衬底上的分子结构设计提供了信息，这些材料在量子纳米电子学中具有潜在的应用前景。

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引用次数: 0

Entropy-engineered spinel oxide coatings to enhance oxidation resistance and electrical performance of solid oxide fuel cell interconnectors 熵工程尖晶石氧化物涂层，以提高固体氧化物燃料电池互连的抗氧化性和电性能

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-03-01 Epub Date: 2026-02-27 DOI: 10.1016/j.apsadv.2026.100956

Cheng-Ju Tsai , Hideyuki Murakami , Yoshiaki Toda , Fan-Yi Ouyang , Hyoung Seop Kim , An-Chou Yeh

This study investigates spinel oxide coatings derived from medium- to high-entropy alloy systems for solid oxide fuel cell interconnect applications. Alloy coatings of Fe-Mn-Co, Fe-Mn-Co-Cu, and Fe-Mn-Co-Cu-Ni are deposited on SUS430 stainless steel substrates utilizing a magnetron sputtering system and subjected to isothermal oxidation at 650 °C. Microstructural and phase analyses reveal the anomalous formation of hematite layers and Cr-Fe mixed oxide structures in Fe-Mn-Co and Fe-Mn-Co-Cu coatings, which indicates greater Fe diffusion at the substrate/coating interface during the early stage of oxidation comparing to that of Fe-Mn-Co-Cu-Ni coating. Theoretical calculations confirm that the hematite and Cr-Fe oxides significantly increase the area specific resistance of Fe-Mn-Co and Fe-Mn-Co-Cu coated steels at 650 °C. Notably, the Fe-Mn-Co-Cu-Ni coating can exhibit superior electrical conductivity, and resistances to oxidation and Cr-evaporation. This study demonstrates that entropy-engineered composition can promote the formation of single phase spinel, enhance phase stability, and can potentially be beneficial for long-term performance of solid oxide fuel cell as coating material for interconnects.

本研究研究了用于固体氧化物燃料电池互连应用的中至高熵合金体系的尖晶石氧化物涂层。利用磁控溅射系统将Fe-Mn-Co、Fe-Mn-Co- cu和Fe-Mn-Co- cu - ni合金涂层沉积在SUS430不锈钢衬底上，并在650℃下进行等温氧化。显微组织和物相分析表明，Fe- mn - co和Fe- mn - co - cu涂层中异常形成了赤铁矿层和Cr-Fe混合氧化物结构，这表明在氧化早期，Fe在基体/涂层界面上的扩散比Fe- mn - co - cu - ni涂层要大。理论计算证实，在650℃时，赤铁矿和Cr-Fe氧化物显著提高了Fe-Mn-Co和Fe-Mn-Co- cu涂层钢的面积比电阻。值得注意的是，Fe-Mn-Co-Cu-Ni涂层具有优异的导电性、抗氧化性和抗cr蒸发性。该研究表明，熵工程化成分可以促进单相尖晶石的形成，增强相稳定性，并可能有利于固体氧化物燃料电池作为互连涂层材料的长期性能。

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引用次数: 0

Interfacial synergism of cobalt phthalocyanine modulated Ni3V2O8-NrGO self-assemblies as effective and durable electrocatalyst for overall water splitting 酞菁钴调制Ni3V2O8-NrGO自组装的界面协同作用作为有效和持久的整体水分解电催化剂

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-03-01 Epub Date: 2026-02-20 DOI: 10.1016/j.apsadv.2026.100954

Adam Gopal Ramu , Yongbum Kwon , Jung –Hun Noh , Da-Woon Jeong , Handol Lee

The development of efficient, durable, and noble-metal-free electrocatalysts remains a central challenge in advancing alkaline overall water splitting for green hydrogen production. Herein, we report a rationally designed hybrid electrocatalyst comprising Ni₃V₂O₈ nanosheets integrated with nitrogen-doped reduced graphene oxide (NrGO) and molecularly anchored cobalt phthalocyanine (CoPc). The synergistic coupling between CoPc and the Ni₃V₂O₈ framework induces electronic modulation that stabilizes Ni in high-valence states (Ni³⁺/Ni⁴⁺), significantly enhancing oxygen evolution reaction (OER) activity. Concurrently, high-valence V species and CoPc–NrGO interfaces serve as highly active sites for the hydrogen evolution reaction (HER). The resulting electrode delivers low overpotentials of 231 mV for OER and 201 mV for HER at 10 mA cm⁻² in KOH and H₂SO₄ respectively, outperforming benchmark RuO₂ and Pt/C catalysts. Strong π–π stacking between CoPc and NrGO, coupled with a conductive and robust carbonaceous architecture, ensures exceptional operational stability. A two-electrode alkaline electrolyzer using this electrode achieves a cell voltage of only 1.46 V at 10 mA cm⁻² and 1.59 V at 50 mA cm⁻², with negligible degradation over extended operation surpassing the performance of conventional Pt/C||RuO₂ systems. This work demonstrates that molecular–inorganic integration offers a powerful strategy to engineer high-performance, scalable electrocatalysts for sustainable energy conversion.

开发高效、耐用和无贵金属的电催化剂仍然是推进碱性整体水分解绿色制氢的核心挑战。本文报道了一种合理设计的杂化电催化剂，该催化剂由Ni₃V₂O₈纳米片与氮掺杂还原氧化石墨烯（NrGO）和分子锚定酞菁钴（CoPc）集成而成。CoPc和Ni₃V₂O₈框架之间的协同耦合诱导了电子调制，使Ni稳定在高价态（Ni³+ /Ni⁴+），显著增强了析氧反应（OER）活性。同时，高价V和CoPc-NrGO界面是析氢反应（HER）的高活性位点。在KOH和H2SO4中，OER和HER在10 mA cm⁻²下的过电位分别为231 mV和201 mV，优于基准的RuO₂和Pt/C催化剂。CoPc和NrGO之间的强π -π堆叠，加上导电和坚固的碳质结构，确保了卓越的运行稳定性。使用这种电极的双电极碱性电解槽在10毫安厘米⁻²时的电池电压仅为1.46 V，在50毫安厘米⁻²时的电池电压为1.59 V，在长时间运行中，与传统的Pt/C||RuO₂系统相比，其性能几乎可以忽略。这项工作表明，分子-无机整合为设计高性能、可扩展的电催化剂提供了一种强大的策略，用于可持续的能量转换。

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引用次数: 0

Interface engineering of template free Zn2V2O7 nanoparticle embedded on Ti3C2Tx MXene hybrid supercapacitor for long term cyclic stability 无模板Zn2V2O7纳米粒子嵌入Ti3C2Tx MXene混合超级电容器的界面工程

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-03-01 Epub Date: 2026-01-10 DOI: 10.1016/j.apsadv.2026.100932

S. Maruthasalamoorthy, R. Navamathavan

Pyrovanadate compounds are considered promising electrode candidates for advanced energy storage systems, owing to the superior multivalent redox behavior of vanadium and its inherently high electronic conductivity. In this study, Zn₂V₂O₇ nanoparticles were synthesized via a template-free approach. The high crystallinity of Zn₂V₂O₇, coupled with its indirect band gap characteristics, facilitates enhanced electrochemical performance. The semiconducting transport characteristics of Zn₂V₂O₇ (E_g ≈ 2.85 eV) enable a facile charge-transfer mechanism during redox processes, which in turn yields a high specific capacitance of 954 Fg⁻¹ at a current density of 1 Ag⁻¹. In two-dimensional titanium carbide (Ti₃C₂Tₓ) MXenes, the inherent self-stacking of nanosheets, together with the nature of the surface termination groups, critically governs both electronic conductivity and ion transport behavior. In the Zn₂V₂O₇/Ti₃C₂Tₓ composite, the uniform distribution of Zn₂V₂O₇ nanoparticles across the Ti₃C₂Tₓ surface establishes a well-defined interfacial architecture, resulting in a markedly enhanced specific capacitance of 1130 Fg⁻¹ at a current density of 1 Ag⁻¹. The solid-state device based on the Zn₂V₂O₇/Ti₃C₂Tₓ//AC configuration exhibits hybrid supercapacitive behavior, delivering a high areal capacitance of 266 mFcm⁻² at a current density of 2 mAg⁻¹. The fabricated hybrid supercapacitor demonstrates outstanding cycling stability (∼98% capacitance retention, 99% coulombic efficiency after 15,000 cycles at 10 Ag⁻¹) and delivers an energy density of 83.43 mWhkg⁻¹ with a power density of 3300 mW·kg⁻¹ at 2 mA·g⁻¹, underscoring its potential for practical applications.

由于钒优异的多价氧化还原性能及其固有的高电子导电性，焦钒酸盐化合物被认为是先进储能系统的有前途的电极候选者。本研究采用无模板法合成了Zn₂V₂O₇纳米颗粒。Zn₂V₂O₇的高结晶度，加上其间接带隙特性，有助于提高电化学性能。Zn₂V₂O₇（Eg≈2.85 eV）的半导体输运特性使其在氧化还原过程中具有简单的电荷转移机制，从而在1 Ag⁻¹的电流密度下产生954 Fg⁻¹的高比电容。在二维碳化钛（Ti₃C₂Tₓ）MXenes中，纳米片固有的自堆叠以及表面端基的性质对电子导电性和离子输运行为起着关键作用。在Zn₂V₂O₇/Ti₃C₂Tₓ复合材料中，Zn₂V₂O₇纳米颗粒在Ti₃C₂Tₓ表面的均匀分布建立了一个明确的界面结构，从而在电流密度为1 Ag⁻¹时显着提高了1130 Fg⁻¹的比电容。基于Zn₂V₂O₇/Ti₃C₂Tₓ//AC结构的固态器件表现出混合超电容行为，在电流密度为2 mAg⁻²时提供266 mFcm的高面电容。制作的混合超级电容器具有出色的循环稳定性（在10 mA·g⁻¹下循环15,000次后，电容保持率为98%，库仑效率为99%），能量密度为83.43 mWhkg⁻¹，功率密度为3300 mW·kg⁻¹，强调了其实际应用的潜力。

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引用次数: 0

DUT-67 superadsorbent for the efficient and rapid removal of nonsteroidal anti-inflammatory drugs (NSAIDs) from water DUT-67超吸附剂用于水中非甾体抗炎药（NSAIDs）的高效快速去除

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-03-01 Epub Date: 2026-02-09 DOI: 10.1016/j.apsadv.2026.100943

George S. Morcos, Hebatullah H. Farghal, Hania A. Guirguis, Mayyada M.H. El-Sayed

Unmodified Dresden University of Technology Metal Organic Framework, DUT-67 (Zr) MOF is applied for the first time in the removal of nonsteroidal anti-inflammatory drugs, NSAIDs, specifically diclofenac (DCF) and salicylic acid (SA), from water. Several characterization techniques were performed for DUT-67 to confirm the structure of the MOF and to determine the textural and morphological properties, which revealed microporous polyhydral microcrystals. Thermal properties and zeta potential measurements were also assessed. A complete batch adsorption study was performed, assessing different parameters, such as the effect of pH, initial concentration, contact time, temperature, and the adsorbent dose, as well as regeneration. An excellent adsorption performance was obtained, where the maximum adsorption capacity was 484.9 mg/g for DCF at pH 7 and 129.9 mg/g at pH 3 for SA, according to Langmuir model. Efficient and rapid adsorption was achieved under a wide range of concentrations to represent various types of water effluents. Controlling mechanisms varied between electrostatic attraction, acid-base coordination, and π-π interactions. The adsorbent was well regenerated for four cycles after both DCF and SA adsorption, and the adsorption was satisfactory in saline conditions. Adsorption in binary systems of DCF and SA showed synergism in the removal percentages, in comparison to their single systems.

未经修饰的德累斯顿工业大学金属有机框架，DUT-67 (Zr) MOF首次应用于去除非甾体类抗炎药NSAIDs，特别是双氯芬酸（DCF）和水杨酸（SA）。对DUT-67进行了多种表征技术，以确定MOF的结构，并确定其结构和形态特征，发现微孔多水合微晶体。热性能和zeta电位测量也进行了评估。进行了完整的间歇吸附研究，评估了不同的参数，如pH、初始浓度、接触时间、温度、吸附剂剂量以及再生的影响。根据Langmuir模型，DCF在pH为7时的最大吸附量为484.9 mg/g， SA在pH为3时的最大吸附量为129.9 mg/g。在广泛的浓度范围内实现了高效和快速的吸附，以代表各种类型的废水。控制机制在静电吸引、酸碱配位和π-π相互作用之间变化。吸附DCF和SA后，吸附剂再生良好，在盐水条件下吸附效果良好。与单一体系相比，DCF和SA的二元体系在去除率方面表现出协同作用。

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引用次数: 0

Patternable laser-oxidized Ta2O5 dielectric and TaS2 contact for optimizing subthreshold swing of MoS2 field-effect transistors 用于优化MoS2场效应晶体管亚阈值摆幅的可图案化激光氧化Ta2O5电介质和TaS2触点

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-03-01 Epub Date: 2026-02-24 DOI: 10.1016/j.apsadv.2026.100955

Kuan-Cheng Lu , Pen-Yuan Shih , Pin-Hsien Lin , Shih-Hao Wu , Kimitoshi Kono , Wen-Bin Jian , Yu-Han Lin , Yo-Yao Ho , Ching-Hwa Ho , Shin-Yuan Wang , Chao-Hsin Chien , Ching-Yu Chiang , Shu-Jui Chang , Yu-Che Huang , Kenji Watanabe , Takashi Taniguchi , Kazuhito Tsukagoshi , Chenming Hu

Recent progress has achieved a high on-current density and a low contact resistivity for n-type field-effect transistors using two-dimensional (2D) semiconductors such as MoS₂ and WSe₂. However, other issues with device parameters remain unresolved, such as the use of complementary transistors with a single 2D semiconductor, environmental packaging, and dielectric layers. Integrating an optimal dielectric and ideal interfacial contact for mass production will play a crucial role in future electronics designs. Here, we demonstrate patternable laser oxidation to convert TaS₂ into Ta₂O₅ as an ultra-flat dielectric layer, having been evidenced by energy-dispersive X-ray spectroscopy, nano-X-ray absorption near-edge structure, and atomic force microscopy. With this patternable conversion, we also demonstrate the implementation of TaS₂ as contact electrodes on the MoS₂ channel material. The Ta₂O₅ layer reveals a dielectric constant of ∼15.98 and a breakdown field of ∼5.5 MV/cm. A high on-current density of ∼34.7

μ A / μ m

is achievable in Bi-contacted devices at a channel length of 1.0 μm. Moreover, the TaS₂-contacted MoS₂ transistors on Ta₂O₅ present an extremely low subthreshold swing of ∼59.8 mV/dec and a minimal hysteresis of ∼0.15 V. This indicates the superior feature of the Ta₂O₅ dielectric through patternable laser oxidation while keeping an ultra-flat interfacial surface.

最近的进展是利用二维（2D）半导体（如MoS2和WSe2）实现了n型场效应晶体管的高导通电流密度和低接触电阻率。然而，器件参数的其他问题仍未解决，例如在单个2D半导体中使用互补晶体管、环境封装和介电层。集成最佳介电介质和理想的大规模生产界面接触将在未来的电子设计中发挥至关重要的作用。通过能量色散x射线光谱、纳米x射线吸收近边结构和原子力显微镜，我们证明了激光氧化将TaS2转化为Ta2O5作为超平面介电层。通过这种模式转换，我们还演示了TaS2作为MoS2通道材料上的接触电极的实现。Ta2O5层的介电常数为~ 15.98，击穿场为~ 5.5 MV/cm。在通道长度为1.0 μm的双触点器件中，可以实现高达34.7 μA/μm的高导通电流密度。此外，Ta2O5上的tas2接触MoS2晶体管具有极低的亚阈值摆幅（~ 59.8 mV/dec）和最小的滞回（~ 0.15 V）。这表明Ta2O5电介质在保持超平坦的界面表面的同时，通过可图案化的激光氧化具有优越的特性。

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引用次数: 0

Improved structural integrity of cold-sprayed aluminum alloy-quasicrystal composite coatings assessed by cavitation erosion testing 用空化腐蚀试验评价冷喷涂铝合金-准晶复合涂层的结构完整性

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-01-01 Epub Date: 2026-01-06 DOI: 10.1016/j.apsadv.2025.100924

Reza Jafari , Renato Pero , Eero Helmi , Milad Zohrevand , Tejas Gundgire , Mari Honkanen , Minnamari Vippola , Heli Koivuluoto

Metal matrix composite coatings (MMCs) offer functionalities beyond those of single-phase alloys due to the favorable properties of their constituent phases combined. This work investigated how reinforcing AA6061 aluminum alloy (AA) with hard Al-based quasicrystal particles (QC) influences the integrity of the final composite. Coatings were deposited using solid-state high pressure cold spray (CS) using mixture of AA particles and 0, 50, or 90 vol.% QC particles as the feedstock, sprayed with identical process parameters to isolate the reinforcement effect. QC particles, dispersed as reinforcements in the final composite coating, reduces porosity, and drive microstructural refinement such as elongated and refined grains (≈ 30–200 nm). Consequently, localized strengthening occurred within the matrix, increasing local nano-hardness by over 50% (from 2.21 to 3.43 GPa), as revealed by dense in-situ nanoindentation and corresponding mapping of hardness/elastic modulus. Cavitation erosion was repurposed as a probe for assessing coating integrity. The average cumulative volume loss was significantly reduced relative to AA6061 at 30 min of exposure, from 34.7 mm³ dropping down to ∼20% (7.4 mm³) and ∼5% (1.7 mm³) for the composites with 50 and 90 vol.% QC in starting feedstock, respectively, due to matrix strengthening and improved cohesion between bonded particles. Microstructural investigation of eroded surfaces revealed transition in the damage mechanism, from particle chunk detachment along AA particle boundaries in the non-reinforced coating, to gradual and uniform removal of matrix and reinforcement as fine debris in the composite structures. Our findings suggest improved coating durability, enhanced interparticle cohesion and matrix strengthening.

金属基复合涂层（MMCs）由于其组成相结合的良好性能而具有超越单相合金的功能。本文研究了用硬al基准晶颗粒（QC）增强AA6061铝合金（AA）对最终复合材料完整性的影响。采用固态高压冷喷涂（CS）沉积涂层，以AA颗粒和0%、50%或90%体积% QC颗粒的混合物为原料，在相同的工艺参数下喷涂，以隔离增强效果。QC颗粒作为增强剂分散在最终的复合涂层中，减少了孔隙率，并促进了显微组织的细化，如拉长和细化晶粒（≈30-200 nm）。因此，基体内部发生了局部强化，局部纳米硬度增加了50%以上（从2.21 GPa增加到3.43 GPa），这是由密集的原位纳米压痕和相应的硬度/弹性模量映射所揭示的。将空化侵蚀作为评价涂层完整性的探针。相对于AA6061，暴露30分钟时的平均累积体积损失显著降低，从34.7 mm3降至20% （7.4 mm3）和5% (1.7 mm3)，这是由于基体增强和结合颗粒之间的内聚性提高。对侵蚀表面的微观组织研究揭示了损伤机制的转变，即从非增强涂层中沿AA颗粒边界的颗粒块状脱落，到复合材料组织中基体和增强物作为细碎屑逐渐均匀去除。我们的研究结果表明，涂层耐久性提高，颗粒间凝聚力和基体强化增强。

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引用次数: 0

Thermoelectric power factors of defective scandium nitride nanostructures from first principles 从第一性原理研究缺陷氮化钪纳米结构的热电功率因子

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-01-01 Epub Date: 2026-01-07 DOI: 10.1016/j.apsadv.2025.100923

Luigi Cigarini , Urszula D. Wdowik , Dominik Legut

The thermoelectric properties of scandium nitride are strongly influenced by structural and electronic factors arising from defects and impurities. Nevertheless, the mechanisms by which these microscopic features affect transport are not yet fully understood. Experiments show a large variability in the electronic transport properties, with a strong dependence on the experimental conditions, and attempts to improve thermoelectric efficiency often lead to conflicting effects. In this work, we employ the Landauer approach to analyze the effects of different kinds of structural defects and impurities on electronic transport in scandium nitride. This approach allows us to relate the transport mechanisms to the structural and electronic modifications introduced in the lattice, with atomistic resolution. In light of these new insights, we propose a rationale relating part of the experimental variability to its microscopic origin.

氮化钪的热电性能受缺陷和杂质引起的结构和电子因素的强烈影响。然而，这些微观特征影响转运的机制尚未完全了解。实验表明，电子输运性质有很大的可变性，与实验条件有很强的依赖性，并且试图提高热电效率往往导致相互冲突的效果。在这项工作中，我们采用兰道尔方法分析了不同类型的结构缺陷和杂质对氮化钪电子输运的影响。这种方法使我们能够将输运机制与晶格中引入的结构和电子修改联系起来，并具有原子分辨率。根据这些新的见解，我们提出了一个基本原理，将部分实验变异性与其微观起源联系起来。

引用次数: 0

Adhesion between a borophane sheet and a metal substrate by interface bonding 硼玻璃片与金属基板之间通过界面粘合而形成的粘合

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-01-01 Epub Date: 2025-12-16 DOI: 10.1016/j.apsadv.2025.100918

Kazuki Yamaguchi , Heming Yin , Masahito Niibe , Jingmin Tang , Masashige Miyamoto , Yuki Tsujikawa , Haruto Sakurai , Yu Murano , Kenichi Ozawa , Masafumi Horio , Jun-ichi Yamaura , Takahiro Kondo , Iwao Matsuda

Boron deposited on transition metal substrates has been actively investigated as a system that exhibits a wide range of surface structures. However, the specific case of nickel substrates remains largely unexplored. Nickel boride is used as a tribological material with excellent wear resistance and as a catalyst for hydrogenation, and its synthesis methods, structure, and functionality are being vigorously investigated. In this study, borophane, a two-dimensional material composed of hydrogen and boron, was heated to 300 °C in contact with a nickel substrate. We found that, compared with that annealed at 100 °C, annealed at 300 °C had a color that shifted toward longer wavelengths, and no longer dissolved in the synthesis solvent. However, x-ray diffraction and Fourier-transform infrared spectroscopy revealed no significant differences between the borophane samples annealed at 100 and 300 °C. X-ray absorption spectroscopy and x-ray photoelectron spectroscopy revealed that the surface oxide of nickel was reduced by borophane, resulting in the formation of nickel boride. Furthermore, thermal desorption spectroscopy showed that hydrogen desorbed from borophane upon contact with nickel, revealing that the borophane–nickel interface consisted of nickel boride and boron oxide layers. These findings provide insight into the surface science of boron on transition metal substrates and for the development of functional materials using these systems.

硼作为一种具有多种表面结构的体系，沉积在过渡金属衬底上已经得到了积极的研究。然而，镍衬底的具体情况在很大程度上仍未被探索。硼化镍作为一种具有优异耐磨性的摩擦学材料和氢化催化剂，其合成方法、结构和功能等方面的研究正在蓬勃发展。在这项研究中，硼烷是一种由氢和硼组成的二维材料，与镍衬底接触，加热到300℃。我们发现，与100°C退火的相比，300°C退火的颜色向更长的波长偏移，并且不再溶解在合成溶剂中。然而，x射线衍射和傅里叶变换红外光谱显示，在100°C和300°C退火的硼烷样品之间没有显著差异。x射线吸收光谱和x射线光电子能谱显示，镍的表面氧化物被硼烷还原，形成硼化镍。此外，热解吸光谱显示，硼磷石与镍接触后，氢被解吸，表明硼磷石-镍界面由硼化镍和氧化硼层组成。这些发现为过渡金属基板上硼的表面科学以及使用这些系统开发功能材料提供了见解。

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