Applied Surface Science Advances最新文献_第2页

Effect of electropolishing conditions on nanostructured anodized surfaces for enhanced superhydrophilicity and corrosion resistance of 304 and 316 L Stainless Steels 电抛光条件对纳米结构阳极氧化表面增强304和316l不锈钢超亲水性和耐腐蚀性的影响

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-03-01 Epub Date: 2026-01-23 DOI: 10.1016/j.apsadv.2026.100938

Jisoo Kim , Chanyoung Jeong

This study shows that variations in electropolishing (EP) conditions influence the stability and uniformity of the interfacial viscous layer on SUS 304 and SUS 316 L, resulting in distinct dissolution behavior and nanoscale morphology in the anodic oxide films. Under the EP1 condition, the thicker and less uniform viscous layer promoted localized dissolution, which formed a dual-layered oxide with wide and shallow polygonal pores, and with pronounced superhydrophilic and oleophilic wetting. In EP2, a thinner viscous layer was established, resulting in a denser nanoporous oxide with smaller and more uniform pores and moderate wettability. Importantly, these electropolishing-induced dimple structures acted as morphological templates, causing the anodic oxide films to develop markedly different pore sizes and thicknesses even under identical anodization conditions. XPS confirmed EP-induced redistribution of alloying elements (Cr, Ni, Mo) and the growth of multicomponent oxides after anodization. Electrochemical measurements demonstrated that EP2 significantly enhanced passivation performance, producing lower corrosion current density and higher Rfilm and Rct compared with untreated samples. Overall, this work clarifies how electropolishing conditions, in combination with alloy-dependent dissolution behavior, determine dimple formation, nanopore evolution, and corrosion performance. These insights identify EP2 as an effective pretreatment route for producing dense, stable oxide films with enhanced long-term durability on stainless steels. Importantly, this study demonstrates that variations in electropolishing conditions generate distinct micro-dimple morphologies, which in turn dictate the pore structure and thickness of the anodic oxide layer even under identical anodization parameters.

研究表明，电抛光条件的变化影响了sus304和sus316l表面黏结层的稳定性和均匀性，导致了阳极氧化膜中不同的溶解行为和纳米级形貌。在EP1条件下，较厚且较不均匀的粘性层促进了局部溶解，形成了具有宽而浅的多边形孔隙的双层氧化物，具有明显的超亲水和亲油润湿作用。在EP2中，建立了更薄的粘性层，形成了更致密的纳米孔氧化物，孔隙更小、更均匀，润湿性适中。重要的是，这些电抛光诱导的凹窝结构作为形态模板，即使在相同的阳极氧化条件下，也会导致阳极氧化膜产生显着不同的孔径和厚度。XPS证实了ep诱导合金元素（Cr, Ni, Mo）的重分布和阳极氧化后多组分氧化物的生长。电化学测量表明，与未经处理的样品相比，EP2显著增强了钝化性能，产生更低的腐蚀电流密度，更高的Rfilm和Rct。总的来说，这项工作阐明了电抛光条件如何结合合金依赖的溶解行为，决定了韧窝的形成、纳米孔的演化和腐蚀性能。这些见解表明，EP2是一种有效的预处理途径，可以在不锈钢上生产致密、稳定的氧化膜，并增强其长期耐久性。重要的是，该研究表明，即使在相同的阳极氧化参数下，电抛光条件的变化也会产生不同的微窝形态，这反过来又决定了阳极氧化层的孔结构和厚度。

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引用次数: 0

Periodic surface structure formation on silicon surfaces by irradiation of single and multiple femtosecond laser pulses 单次和多次飞秒激光脉冲照射下硅表面周期性表面结构的形成

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.2026.100947

Iaroslav Gnilitskyi , Oksana Chukova , Arno Jeromin , Thomas F. Keller , Tzveta Apostolova

Laser-induced periodic surface structures (LIPSS) were fabricated on silicon substrates using a low number of ultrashort laser pulses with 266 fs pulse duration at a 1030 nm wavelength. The obtained structures were investigated with SEM and EDX techniques, then the obtained results were simulated by theoretical calculations. In the applied theoretical approach, the LIPSS formation is simulated by a semi-empirical model of interference of the incident laser beam with surface-scattered electromagnetic waves generated at a rough surface, which includes excitation of surface plasmon polaritons (SPP) and accounts for the transient intrapulse changes in optical properties due to photo-excitation of a dense plasma of electron-hole pairs. The threshold conditions for SPP excitation were shown to depend on the laser fluence, wavelength, polarization, and number of pulses. These thresholds were determined from first-principles calculations of the macroscopic dielectric function of the photoexcited material.

The theoretical simulations demonstrate good agreement with the experimental observations obtained from SEM analysis. In particular, the optimal number of laser pulses required to achieve the highest LIPSS periodicity was determined to be two pulses from the theoretical model and three pulses from the experimental study. The corresponding LIPSS periods were found to be 0.922λ and 0.93λ, respectively. Overall, the applied theoretical framework shows strong consistency with experimental results and can be further used for predictive optimization of LIPSS formation conditions for different laser parameters.

在1030nm波长下，利用脉冲长度为266 fs的短脉冲，在硅衬底上制备了激光诱导周期表面结构（LIPSS）。利用SEM和EDX技术对所得结构进行了研究，并对所得结果进行了理论模拟。在应用理论方法中，采用入射激光束与粗糙表面产生的表面散射电磁波干涉的半经验模型来模拟LIPSS的形成，其中包括表面等离子激元（SPP）的激发，并解释了由于电子-空穴对密集等离子体的光激发而导致的光学性质的瞬态脉冲内变化。SPP激发的阈值条件与激光能量、波长、极化和脉冲数有关。这些阈值是由光激发材料的宏观介电函数的第一性原理计算确定的。理论模拟结果与SEM实验结果吻合较好。特别是，实现最高LIPSS周期性所需的最佳激光脉冲数为理论模型中的两个脉冲和实验研究中的三个脉冲。相应的LIPSS周期分别为0.922λ和0.93λ。总体而言，应用理论框架与实验结果具有较强的一致性，可进一步用于不同激光参数下LIPSS形成条件的预测优化。

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引用次数: 0

Boosting the chemi-resistive performance of rGO/Co2SnO4 hybrid films for ultra-sensitive and rapid low-ppm-level dimethylamine gas sensing under ambient conditions 提高rGO/Co2SnO4杂化膜的耐化学性能，用于环境条件下超灵敏和快速低ppm二甲胺气体传感

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-03-01 Epub Date: 2026-02-05 DOI: 10.1016/j.apsadv.2026.100946

Santhosh Nallakumar , Vijaya B , Ravikumar Thangavel , Logu Thirumalaisamy , Roshini Xavier , Anand Sekar , Ravi Shanker Babu , Usha Rani Muthurakku

Volatile organic compounds (VOCs) are extensively used across numerous industrial and domestic sectors, have raised a growing environmental and health concerns. Among them, dimethylamine (DMA) is a highly toxic and readily volatile compound widely utilized in pharmaceutical and agrochemical industries, necessitating efficient detection and monitoring due to its significant ecological and health risks. Chemi-resistive based binary metal oxide semiconductor as a sensing layer have been widely studied. However, their performance hindered by the requirement of elevated operating temperatures, poor selectivity, and interference from other target analytes. Achieving the superior gas sensing performance under ambient condition remains a major bottleneck, primarily due to limited available active sites and sluggish charge-transfer dynamics. In this research, we designed a rGO/Co₂SnO₄ hybrid sensor film using spray pyrolysis followed by spin coating techniques to boosting their DMA gas sensing behaviour at room temperature. Subsequently, the developed sensor films were scrutinized using structural, optical, morphological, and elemental analyses to affirm their physicochemical properties and the creation of Schottky barriers at the interfaces. The optimized rGO/Co₂SnO₄ hybrid sensor (CTR1.0) shows an enhanced sensor response of S = 12,548 towards 5 ppm DMA gas at room temperature, alongside with the rapid response (117 s) and recovery time (19 s), respectively. These results demonstrate that the effective rGO/Co₂SnO₄ interfacial coupling markedly enhances charge transport and target gas adsorption, outlining a promising roadmap for developing scalable, advanced and low-power DMA sensors with superior performance.

挥发性有机化合物（VOCs）广泛应用于众多工业和家庭部门，引起了越来越多的环境和健康问题。其中二甲胺（dimethylamine， DMA）是一种剧毒易挥发的化合物，广泛应用于制药和农化行业，具有重大的生态和健康风险，需要进行高效的检测和监测。化学电阻型二元金属氧化物半导体作为传感层得到了广泛的研究。然而，它们的性能受到操作温度升高、选择性差和其他目标分析物干扰的限制。在环境条件下实现优异的气体传感性能仍然是一个主要的瓶颈，主要是由于有限的可用活性位点和缓慢的电荷传递动力学。在这项研究中，我们设计了一种rGO/Co2SnO4混合传感器薄膜，采用喷雾热解和自旋涂层技术来提高其在室温下的DMA气体传感性能。随后，利用结构、光学、形态和元素分析对开发的传感器薄膜进行了仔细检查，以确认其物理化学性质和界面上肖特基势垒的产生。优化后的rGO/Co2SnO4混合传感器（CTR1.0）在室温下对5 ppm DMA气体的响应增强了S = 12,548，同时具有快速的响应（117 S）和恢复时间（19 S）。这些结果表明，有效的氧化石墨烯/Co2SnO4界面耦合显着增强了电荷传输和目标气体吸附，为开发具有优异性能的可扩展，先进和低功耗的DMA传感器勾画了一个有希望的路线图。

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引用次数: 0

Particle size-dependent flowability, impact behaviour, and post-deposition heat treatment microstructure evolution in cold-sprayed Ti-5553 冷喷涂Ti-5553的颗粒尺寸依赖性流动性，冲击行为和沉积后热处理组织演变

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-03-01 Epub Date: 2026-02-05 DOI: 10.1016/j.apsadv.2026.100945

A. Ağır , K. Singh , P. Sudigdo , C.J. Bennett , T. Hussain

The particle size distribution (PSD) significantly influences powder flowability, feeding stability, in-flight particle acceleration, deposition thickness, porosity, and particle deformation during cold spray (CS) of the Ti-5Al-5Mo-5V-3Cr (Ti-5553) alloy. In this study, Ti-5553 feedstock powder was investigated in four PSD groups, which are fine, medium, large, and broad. Powder flowability and mass flow rates were measured by Hall flowmeter tests and a powder feeder. Deposit deformation was examined using scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD). In-flight impact velocities (V_imp) and the bow shock effects on fine particles were modelled with a computational fluid dynamics (CFD) model. Additionally, critical velocities (V_cr) for the different particle sizes were estimated by finite element analysis (FEA). The fine powder exhibited the poorest flowability and the lowest feeder mass flow rate, and produced the thinnest deposit at 190 ± 11.7 µm; however, the medium, large, and broad PSDs produced deposits of 1785 ± 66.1 µm, 1876 ± 44.6 µm, and 1884 ± 68.8 µm, respectively. The medium PSD exhibited a significant improvement in flowability between as-received (AR) and dried conditions in the Hall flowmeter tests. Porosity measurements showed that the medium PSD had 12.5 ± 1.9% porosity, while the large PSD had 19.1 ± 2.1%. Finally, the AR deposits were heat-treated at 800 °C for 5 h to examine the effect on the porosity, and characterised by electron channelling contrast imaging (ECCI) and EBSD to resolve α/β evolution. The study provides guidance on PSD selection by considering feeding behaviour, V_imp and V_cr, deposition porosity and thickness, and post-deposition heat treatment microstructural evaluation.

Ti-5Al-5Mo-5V-3Cr （Ti-5553）合金在冷喷涂过程中，颗粒尺寸分布（PSD）显著影响粉末流动性、进料稳定性、飞行颗粒加速度、沉积厚度、孔隙率和颗粒变形。本研究对Ti-5553原料粉进行了细、中、大、宽四组PSD的研究。通过霍尔流量计试验和给粉机测试了粉末的流动性和质量流量。利用扫描电子显微镜（SEM）和电子背散射衍射（EBSD）对沉积变形进行了检测。利用计算流体力学（CFD）模型模拟了飞行中冲击速度（Vimp）和弓形激波对细颗粒的影响。此外，通过有限元分析（FEA）估计了不同粒径的临界速度（Vcr）。细粉的流动性最差，给料质量流量最低，在190±11.7µm处形成最薄的沉积物；然而，中型、大型和宽型psd的沉积厚度分别为1785±66.1µm、1876±44.6µm和1884±68.8µm。在霍尔流量计测试中，介质PSD在接收（AR）和干燥条件之间的流动性表现出显着改善。孔隙度测量结果显示，中等PSD的孔隙度为12.5±1.9%，大PSD的孔隙度为19.1±2.1%。最后，对AR沉积层进行800℃5 h热处理，考察其孔隙度的影响，并通过电子通道对比成像（ECCI）和EBSD表征α/β演化。该研究综合考虑了进料行为、Vimp和Vcr、沉积孔隙度和厚度以及沉积后热处理显微组织评价，为PSD的选择提供了指导。

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引用次数: 0

Deciphering the driving mechanisms of incubation in ultrashort pulse laser ablation 超短脉冲激光烧蚀中孵育的驱动机制解读

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-03-01 Epub Date: 2026-01-21 DOI: 10.1016/j.apsadv.2025.100928

Nicolas Thomae , Maximilian Spellauge , David Redka , Heinz P. Huber

Incubation, the systematic reduction of the ablation threshold with pulse number, critically influences ultrashort pulse laser micromachining, yet its microscopic origin remains insufficiently understood despite its widespread relevance in applications. Here, multi-pulse experiments (500 fs pulse duration, 1040 nm wavelength) with fluences ranging from 0.75 to e² times the ablation threshold and repetition rate of 1 Hz on aluminum and stainless steel were combined with pulse-resolved absorptance from Finite-Difference-Time-Domain simulations to disentangle the roles of global absorption, crater-edge near-field enhancements, and microscopic material weakening. For aluminum, surface roughening leads to an absorption increase reciprocal to the threshold, providing a sufficient explanation of incubation. In stainless steel, however, the threshold decreases despite nearly constant absorption, demonstrating that increased absorption is not a necessary condition for incubation. Edge-localized near-field enhancements provide an early but limited contribution, saturating after a few pulses. A porosity-based description within classical nucleation theory demonstrates that material weakening can only be explained microscopically by defect-induced reductions of the effective penetration depth together with pulse-dependent nucleation rates. These findings establish a microscopic and quantitative framework for incubation, advancing the physical understanding of the transition from single- to multi-pulse ablation, providing the basis for predictive models of multi-pulse ablation with ultrashort-pulses.

随着脉冲数的系统降低烧蚀阈值，孵育对超短脉冲激光微加工有重要影响，尽管其在应用中广泛相关，但其微观起源仍未得到充分了解。在这里，多脉冲实验（500 fs脉冲持续时间，1040 nm波长），影响范围为0.75到e2倍的烧蚀阈值和重复频率为1 Hz的铝和不锈钢，结合脉冲分辨吸收从有限差分时域模拟，以区分全局吸收，陨石坑边缘近场增强和微观材料弱化的作用。对于铝，表面粗化导致吸收增加与阈值的倒数，为孵化提供了充分的解释。然而，在不锈钢中，尽管吸收几乎恒定，阈值却降低，这表明吸收增加并不是孵化的必要条件。边缘定位的近场增强提供了早期但有限的贡献，在几个脉冲后饱和。经典成核理论中基于孔隙度的描述表明，材料的弱化只能通过缺陷引起的有效穿透深度的降低以及脉冲相关的成核速率来微观解释。这些发现建立了一个微观和定量的培养框架，推进了从单脉冲到多脉冲消融转变的物理认识，为超短脉冲多脉冲消融预测模型提供了基础。

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引用次数: 0

Regulation of inflammation and osteogenic–adipogenic balance on titanium surfaces: a systematic evaluation of LIPSS 钛表面炎症和成骨-脂肪平衡的调节：LIPSS的系统评价

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-03-01 Epub Date: 2026-03-02 DOI: 10.1016/j.apsadv.2026.100962

Andrés Pazos-Pérez , María Piñeiro-Ramil , Ana Alonso-Pérez , María Guillán-Fresco , Miriam López-Fagúndez , Verónica López , Carolina Viana-Giorno , Daniel Nieto , Rodolfo Gómez , Alberto Jorge-Mora

Despite its widespread use in orthopedic implants, titanium exhibits limited bioactivity, which hinders effective osseointegration. To enhance its biological performance, laser-induced periodic surface structures (LIPSS) have emerged as a promising strategy, providing nanoscale topographies that influence cell behavior. In this study, we systematically evaluated the effect of femtosecond laser power (50–150 mW) on LIPSS formation on titanium surfaces, with and without concurrent hydroxyapatite (HA) incorporation, and examined their impact on inflammatory and differentiation responses in C3H10T1/2 mesenchymal stem cells. All laser powers generated well-defined LIPSS, with increasing surface roughness and particulate deposition at higher powers. Biologically, the surfaces generated using a laser power of 50 mW attenuated excessive inflammatory responsiveness under LPS stimulation (mean fold change of inflammatory markers 0.61) compared with weaker attenuation at higher powers (0.72–0.80) or HA-treated surfaces (0.93). Importantly, the 50 mW surface also promoted the most robust osteogenic differentiation, increasing the mean expression of osteogenic markers by 1.66-fold at day 7 and 1.43-fold at day 14 relative to controls, while maintaining adipogenic marker expression slightly below control levels (mean fold change of adipogenic markers 0.94). In contrast, higher laser powers and HA incorporation induced modest but consistent increases in adipogenic marker expression. These findings indicate that low-power LIPSS effectively balance immune modulation and osteogenesis, providing an advantageous surface modification strategy for titanium implant optimization. Overall, this study establishes a mechanistic link between laser power, surface topography, and cellular responses, highlighting low-power LIPSS as a promising approach to enhance implant integration.

尽管钛在骨科植入物中广泛使用，但其生物活性有限，阻碍了有效的骨整合。为了提高其生物性能，激光诱导周期表面结构（LIPSS）已成为一种有前途的策略，提供影响细胞行为的纳米级拓扑结构。在这项研究中，我们系统地评估了飞秒激光功率（50-150 mW）对钛表面LIPSS形成的影响，并研究了它们对C3H10T1/2间充质干细胞炎症和分化反应的影响。所有的激光功率都产生了定义良好的LIPSS，在更高的功率下，表面粗糙度和颗粒沉积增加。在生物学上，与高功率（0.72-0.80）或ha处理的表面（0.93）相比，使用50 mW激光产生的表面在LPS刺激下减弱了过度的炎症反应性（炎症标志物的平均倍数变化0.61）。重要的是，50mw表面也促进了最强劲的成骨分化，与对照组相比，第7天和第14天成骨标志物的平均表达量分别增加了1.66倍和1.43倍，同时使成脂标志物的表达量保持在略低于对照组的水平（成脂标志物的平均倍变化为0.94）。相比之下，更高的激光功率和HA掺入诱导了适度但持续的脂肪生成标记物表达增加。这些结果表明，低功率LIPSS有效地平衡了免疫调节和成骨作用，为钛种植体优化提供了有利的表面修饰策略。总的来说，这项研究建立了激光功率、表面形貌和细胞反应之间的机制联系，强调了低功率LIPSS作为一种有前途的方法来增强植入物的整合。

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引用次数: 0

One-step photochemical synthesis of NIR-emissive and photothermal gold nanoclusters for biosensing application 用于生物传感的nir发光和光热金纳米团簇的一步光化学合成

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-03-01 Epub Date: 2026-02-28 DOI: 10.1016/j.apsadv.2026.100961

Ester Butera , Regina Maria Chiechio , Saad Akeel , Valerie Marchi , Riccardo Reitano , Francesco Ruffino , Valentina Giglio , Grazia Maria Letizia Consoli , Salvatore Petralia

An ecofriendly photochemical approach for the rapid and effective preparation of ultrasmall NIR-emissive gold-nanoclusters from photoirradiation of water-soluble glutathione (GSH) in the presence of HAuCl₄ is reported. The formation of gold nanoclusters with a glutathione shell (AuNCs-SG) is confirmed by optical measurements, mass spectrometry, NMR spectroscopy, and transmission electron microscopy. The AuNCs-SG exhibit good luminescence quantum yield (φ=1.1 %), long emission lifetime (1.22 μs), large Stoke’s shift (435 nm), and good photothermal yield conversion upon NIR-light excitation (η_808nm=33.9 %). The effect of the GSH ligand amount and AuNC compositions on the optical properties are extensively investigated. Bimetallic silver/gold-nanoclusters (AgAuNCs-SG) are also prepared and characterized to evaluate the effect of the Ag-doping on the optical properties of the nanocluster. The AuNCs-SG are successfully tested for the optical biosensing of Interleukine 6-antigen (IL6), with a LoD value of 57.5 fg mL⁻¹, through the formation of an IL6−antibody/nanocluster conjugate. The PL signal quenching is related to the amount of IL6 in the samples.

本文报道了一种在HAuCl4存在下，利用水溶性谷胱甘肽（GSH）光化学快速有效地制备超小nir发光金纳米团簇的环保光化学方法。具有谷胱甘肽壳的金纳米团簇（AuNCs-SG）的形成被光学测量、质谱、核磁共振光谱和透射电子显微镜证实。AuNCs-SG具有良好的发光量子产率（φ= 1.1%）、较长的发射寿命（1.22 μs）、较大的斯托克位移（435 nm）和良好的近红外激发光热产率转换（η808nm= 33.9%）。广泛研究了GSH配体用量和AuNC组成对光学性质的影响。制备了双金属银/金纳米团簇（AgAuNCs-SG），并对其进行了表征，以评价银掺杂对纳米团簇光学性质的影响。通过形成白细胞介素6-抗体/纳米簇偶联物，AuNCs-SG成功地用于白细胞介素6-抗原（IL6）的光学生物传感，LoD值为57.5 fg mL−1。PL信号的猝灭与样品中IL6的含量有关。

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引用次数: 0

Controlling the surface antimicrobial efficacy of anionic block polymers via film thickness 阴离子嵌段聚合物膜厚度对表面抗菌效果的影响

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-03-01 Epub Date: 2026-01-09 DOI: 10.1016/j.apsadv.2026.100931

Kacie M. Wells , Reza A. Ghiladi , Richard J. Spontak

As the global threat of infectious diseases continues to grow due to antimicrobial resistance, novel and non-targeting prevention strategies must be identified and their inactivation mechanisms understood. Upon hydration, styrenic pentablock polymers possessing a partially sulfonated midblock can effectively kill (99.9999+% in most cases) a wide range of contagious pathogens after relatively short exposure times (on the order of minutes) due to the formation of a highly acidic surface contact layer. Here, we demonstrate for a bacterial exemplar that the inactivation efficacy and contact-layer pH of one such anionic block polymer with a constant degree of sulfonation (52 mol%) likewise depend on polymer film thickness, which dictates the proton reservoir available for surface acidification. Our results reveal that the minimum film thickness needed for the polymer to attain the highest inactivation level of ampicillin-resistant Escherichia coli after an exposure time of 2 min is about 65 μm. Interestingly, the calculated proton partition coefficient between the microbial suspension and polymer film reaches a maximum at this thickness and decreases for thicker films, suggesting that proton transport within thick films becomes additionally affected by one or more molecular-level processes within the polymer.

由于抗菌素耐药性导致传染病的全球威胁持续增长，必须确定新的非靶向预防战略，并了解其灭活机制。水合作用后，苯乙烯五嵌段聚合物具有部分磺化的中间嵌段，在相对较短的暴露时间（大约几分钟）后，由于形成了高酸性的表面接触层，在大多数情况下，苯乙烯五嵌段聚合物可以有效地杀死（99.9999+%）各种传染性病原体。在这里，我们以细菌为例证明了一种具有恒定磺化程度（52 mol%）的阴离子嵌段聚合物的失活效果和接触层pH同样取决于聚合物膜厚度，这决定了表面酸化可用的质子库。我们的研究结果表明，暴露2 min后，聚合物达到抗氨苄西林大肠杆菌最高失活水平所需的最小膜厚度约为65 μm。有趣的是，计算出的微生物悬浮液和聚合物膜之间的质子分配系数在该厚度处达到最大值，而在较厚的膜上则减小，这表明厚膜内的质子传输受到聚合物内一个或多个分子水平过程的额外影响。

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引用次数: 0

Copper oxide-based transparent and flexible humidity sensors with laser-induced single-layer integration 基于氧化铜的激光诱导单层集成透明柔性湿度传感器

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-03-01 Epub Date: 2026-02-03 DOI: 10.1016/j.apsadv.2026.100942

Vu Binh Nam , Phuong-Danh Bui , Gia Huy Ngo , Khoa Dang Pham-Nguyen , Sung Yong Bang , Hwangju No , Jungchul Lee , Daeho Lee

This study presents an innovative application of the laser-induced reductive sintering process for fabricating CuO_x-based transparent flexible humidity sensors under ambient conditions. The laser process applies localized thermal energy to the CuO_x nanoparticle (NP) thin film deposited on a flexible polyethylene terephthalate (PET) substrate, inducing direct reductive sintering at the CuO_x/PET interface to form conductive Cu electrodes, and indirect reductive sintering at the Cu/CuO_x interfaces to create a porous, Cu₂O-rich sensing channel between the electrodes. As a result, conducting electrodes and a semiconducting sensing channel are simultaneously formed within a single layer. Additionally, the current collecting Cu layers are patterned into unidirectional line arrays to enhance transparency. The humidity sensors reliably operate in a relative humidity range of 25‒80 %, with remarkably high sensitivity (7.04 × 10⁴) and rapid response and recovery times (0.35 s and 0.80 s). Moreover, the sensor exhibits remarkable optical transparency (96.1 % at 550 nm) and mechanical flexibility, as confirmed by bending, twisting and cyclic bending tests. X-ray photoelectron spectroscopy analysis reveals a significant increase in Cu⁺ in the CuO_x sensing channel by the indirect reductive sintering process, which enhances water adsorption and proton conduction at the CuO_x/water molecule interfaces under humid conditions.

本研究提出了激光诱导还原烧结工艺在环境条件下制造cuox基透明柔性湿度传感器的创新应用。该激光工艺将局部热能应用于沉积在柔性聚对苯二甲酸乙二醇酯（PET）衬底上的CuOx纳米颗粒（NP）薄膜，在CuOx/PET界面处诱导直接还原烧结形成导电Cu电极，在Cu/CuOx界面处诱导间接还原烧结形成电极之间多孔的富Cu₂传感通道。因此，导电电极和半导体传感通道在单层内同时形成。此外，电流收集Cu层被图案成单向线阵列，以提高透明度。湿度传感器在相对湿度25 ~ 80%范围内工作可靠，灵敏度高（7.04 × 104），响应和恢复时间快（0.35 s和0.80 s）。此外，通过弯曲、扭转和循环弯曲测试，该传感器具有优异的光学透明度（在550 nm处为96.1%）和机械灵活性。x射线光电子能谱分析表明，间接还原烧结过程显著增加了CuOx传感通道中的Cu+，从而增强了潮湿条件下CuOx/水分子界面上的水吸附和质子传导。

{"title":"Copper oxide-based transparent and flexible humidity sensors with laser-induced single-layer integration","authors":"Vu Binh Nam , Phuong-Danh Bui , Gia Huy Ngo , Khoa Dang Pham-Nguyen , Sung Yong Bang , Hwangju No , Jungchul Lee , Daeho Lee","doi":"10.1016/j.apsadv.2026.100942","DOIUrl":"10.1016/j.apsadv.2026.100942","url":null,"abstract":"<div><div>This study presents an innovative application of the laser-induced reductive sintering process for fabricating CuO<sub>x</sub>-based transparent flexible humidity sensors under ambient conditions. The laser process applies localized thermal energy to the CuO<sub>x</sub> nanoparticle (NP) thin film deposited on a flexible polyethylene terephthalate (PET) substrate, inducing direct reductive sintering at the CuO<sub>x</sub>/PET interface to form conductive Cu electrodes, and indirect reductive sintering at the Cu/CuO<sub>x</sub> interfaces to create a porous, Cu₂O-rich sensing channel between the electrodes. As a result, conducting electrodes and a semiconducting sensing channel are simultaneously formed within a single layer. Additionally, the current collecting Cu layers are patterned into unidirectional line arrays to enhance transparency. The humidity sensors reliably operate in a relative humidity range of 25‒80 %, with remarkably high sensitivity (7.04 × 10<sup>4</sup>) and rapid response and recovery times (0.35 s and 0.80 s). Moreover, the sensor exhibits remarkable optical transparency (96.1 % at 550 nm) and mechanical flexibility, as confirmed by bending, twisting and cyclic bending tests. X-ray photoelectron spectroscopy analysis reveals a significant increase in Cu<sup>+</sup> in the CuO<sub>x</sub> sensing channel by the indirect reductive sintering process, which enhances water adsorption and proton conduction at the CuO<sub>x</sub>/water molecule interfaces under humid conditions.</div></div>","PeriodicalId":34303,"journal":{"name":"Applied Surface Science Advances","volume":"32 ","pages":"Article 100942"},"PeriodicalIF":8.7,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147397288","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}

引用次数: 0

Corrigendum to “Enhancing hydrophilic properties of spherical C(sp2)-hybridized carbon nanostructures through the targeted oxidation of their outer layer” [Applied Surface Science Advances 30 (2025) 100906] “通过外层靶向氧化增强球形C（sp2）杂化碳纳米结构的亲水性”的勘误表[应用表面科学进展30 (2025)100906]

IF 8.7 Q1 CHEMISTRY, PHYSICAL

Applied Surface Science Advances

Pub Date : 2026-03-01 Epub Date: 2026-01-31 DOI: 10.1016/j.apsadv.2026.100941

Marta E. Plonska-Brzezinska , Joanna Breczko , Damian Pawelski , Julio César Zuaznabar Gardona , Alex Fragoso , Krzysztof Brzezinski , Artur P. Terzyk

引用次数: 0