ACS Applied Nano Materials最新文献

{"title":"CeO2 Nanoparticles Initiate Selective Radiation-Induced Death of Cancer Cells through Redox, Cell Cycle, and DNA Repair Disruptions","authors":"Nelli R. Popova,&nbsp;, ,&nbsp;Viktoriia A. Anikina*,&nbsp;, ,&nbsp;Nikita N. Chukavin,&nbsp;, ,&nbsp;Artem Ermakov,&nbsp;, ,&nbsp;Sergey Koryakin,&nbsp;, and ,&nbsp;Anton L. Popov,&nbsp;","doi":"10.1021/acsanm.5c03960","DOIUrl":"https://doi.org/10.1021/acsanm.5c03960","url":null,"abstract":"<p >Citrate-stabilized cerium oxide nanoparticles (CeO₂ NPs) with ultrasmall size (2–4 nm) were synthesized and comprehensively characterized, demonstrating high colloidal stability and favorable redox properties. Their radioprotective and radiosensitizing potential was evaluated in aqueous systems and in vitro using human mesenchymal stem cells (hMSCs) and MCF-7 breast cancer cells. CeO₂ NPs exhibited concentration-dependent catalytic activity, efficiently scavenging hydrogen peroxide and hydroxyl radicals under X-ray irradiation. In hMSCs, CeO₂ NPs promoted proliferation, reduced apoptosis, and attenuated DNA double-strand breaks, thereby conferring radioprotection. In contrast, in MCF-7 cells, CeO₂ NPs enhanced ROS accumulation, disrupted cell-cycle checkpoints, increased γ-H2AX foci, and sensitized cells to radiation-induced apoptosis. Gene expression profiling revealed differential regulation of oxidative stress and apoptosis pathways consistent with selective protection of normal cells and radiosensitization of cancer cells. These findings highlight the dual redox-dependent activity of CeO₂ NPs and support their potential application as nanomaterials for radioprotection and radiosensitization.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 42","pages":"20592–20606"},"PeriodicalIF":5.5,"publicationDate":"2025-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145339624","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":"Charge-Based Molecular Separation Using Conical Nanopores in SiO2 Membranes","authors":"Nahid Afrin*,&nbsp;, ,&nbsp;Shankar Dutt,&nbsp;, ,&nbsp;Alexander Kiy,&nbsp;, ,&nbsp;Vincent Craig,&nbsp;, ,&nbsp;Maria Eugenia Toimil-Molares,&nbsp;, and ,&nbsp;Patrick Kluth*,&nbsp;","doi":"10.1021/acsanm.5c02992","DOIUrl":"https://doi.org/10.1021/acsanm.5c02992","url":null,"abstract":"<p >Membrane-based charge-selective separation is emerging as an excellent platform for the separation of biomolecules and nanoparticles. For efficient charge-selective molecular separation, thin membranes with a well-defined surface charge and a narrow pore size distribution are desirable. However, existing membrane technologies often struggle to achieve such a high performance. This work demonstrates the use of uniform conical nanopores in SiO₂ membranes as a charge-based molecular separation platform. The conical nanopores were fabricated by using the ion-track etching technique. The native negative surface charge of the SiO₂ membrane can be altered to a positive charge by attaching an aminosilane moiety. Our separation experiments demonstrate excellent separation efficiencies of molecules based on their charge. Negatively charged nanopore membranes transport positively charged molecules up to 36 times more efficiently than negatively charged molecules. In contrast, positively charged membranes transport negatively charged molecules approximately 20 times more efficiently than positively charged ones. Furthermore, these membranes demonstrate effective charge-based molecular separation capabilities, successfully isolating oppositely charged molecules from mixed solutions.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 42","pages":"20219–20229"},"PeriodicalIF":5.5,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145339638","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":"CdZnS Nanoparticles Supported on an Ultrathin Cu Metal–Organic Layer as an S-Scheme Photocatalyst for Hydrogen Production and Pollutant Degradation","authors":"Yingcong Wei,&nbsp;, ,&nbsp;Zeyu Su,&nbsp;, ,&nbsp;Hanyi Gu,&nbsp;, ,&nbsp;Ke Wang,&nbsp;, ,&nbsp;Jie Hu*,&nbsp;, and ,&nbsp;Lele Wang*,&nbsp;","doi":"10.1021/acsanm.5c03579","DOIUrl":"https://doi.org/10.1021/acsanm.5c03579","url":null,"abstract":"<p >The carrier separation efficiency and exposure of active sites for photocatalysts are two key factors determining the efficiency of photocatalysis. Minimizing charge carrier recombination while maximizing active site accessibility remains a critical challenge in photocatalytic performance optimization. Herein, an S-Scheme heterojunction composed of two-dimensional (2D) monolayer Cu-5,5′-((anthracene-9,10-diyl)bis(oxy))diisophthalic acid metal–organic layers (CES) and 0D CdZnS nanoparticles (CZS) was designed to improve the kinetics of photocatalytic reactions. The synthesized Cu-MOL exhibited a uniform thickness of approximately 1.98 nm. This ultrathin architecture not only exposed more active sites but also shortened the pathways for mass and charge transfer, thereby enhancing its catalytic activity. In situ irradiated XPS and EPR analysis for DMPO–^•O₂^– signals confirmed an S-scheme charge transfer mechanism, thereby enhancing interfacial charge transfer and preserving a stronger redox ability. As a result, the optimized M₁S₁₀ heterostructure exhibited a high-efficiency photocatalytic hydrogen evolution rate of 124.7 mmol·h^–1·g^–1 under 425 nm light irradiation and a tetracycline hydrochloride (TC) degradation rate of 94% within 40 min. These values significantly surpass those of pure CES (0.1 mmol·h^–1·g^–1 under 380–780 nm, 70% TC degradation) and CZS (43.8 mmol·h^–1·g^–1 under 380–780 nm, 74% TC degradation). This work establishes a viable paradigm for the construction of highly efficient catalysts in solar-to-chemical energy conversion through heterojunction design and morphology modulation.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 42","pages":"20387–20396"},"PeriodicalIF":5.5,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145339595","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":"Vanadium-Doped Ru/Ru Phosphide Mott–Schottky Nanoparticle Heterojunctions for Degrading Polyethylene Terephthalate Beverage Bottles","authors":"Shen Jia,&nbsp;, ,&nbsp;Bincan Ding,&nbsp;, ,&nbsp;Shuang Dong*,&nbsp;, and ,&nbsp;Zhou Yang*,&nbsp;","doi":"10.1021/acsanm.5c03800","DOIUrl":"https://doi.org/10.1021/acsanm.5c03800","url":null,"abstract":"<p >Polyethylene terephthalate (PET) is a widely used plastic; however, it is not easily degraded. Actually, the ethylene glycol (EG) derived from PET hydrolysate can be electrocatalytically oxidized to high-value-added formic acid (FA); the design of the electrocatalyst is the key issue. However, the conventional catalyst suffers from high cost and single activity, thus obtaining high voltage for water splitting and low Faradaic efficiency (FE). Herein, a V-doped Ru/RuP₄ Mott–Schottky (M–S) heterojunction is fabricated, and 10%V-Ru/RuP₄ has the widest band gap and good sensitivity to the EG oxidative reaction (EGOR), thus showing outstanding electrocatalytic performances with a low EGOR voltage of 1.05 V at 10 mA cm^–2 in 1 M KOH + 0.3 M EG. Meanwhile, 10%V-Ru/RuP₄ has a good hydrogen evolution reaction (HER) performance with a low HER potential of 119 mV at 10 mA cm^–2. Furthermore, the EG is electrocatalytically oxidized to FA via a high FE of 93.9% at 1.5 V. This work provides a special M–S heterojunction for PET degrading and upcycling linked to hydrogen evolution.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 42","pages":"20534–20539"},"PeriodicalIF":5.5,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145339615","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":"Ag Nanowire/Polyamide 66 Nanofiber Membranes for Strain Sensing, Humidity Detection, and Dual-Mode Thermal Response","authors":"Yijun Fu,&nbsp;, ,&nbsp;Yijie Wang,&nbsp;, ,&nbsp;Han Zuo,&nbsp;, ,&nbsp;Yuehui Li*,&nbsp;, and ,&nbsp;Dawei Li*,&nbsp;","doi":"10.1021/acsanm.5c03761","DOIUrl":"https://doi.org/10.1021/acsanm.5c03761","url":null,"abstract":"<p >Developing flexible electronic skin that simultaneously possesses multiple high-performance functionalities remains a critical challenge for meeting increasingly complex application demands. To address this challenge, a multifunctional silver nanowire and polyamide 66 (AgNWs/PA66) nanofiber membrane with outstanding strain sensing, humidity detection, and photothermal and electrothermal responses was fabricated by electrospinning and vacuum filtration. Featuring an extremely low sheet resistance of 0.40 Ω/sq, the proposed composite membrane exhibits strain sensing capability with a gauge factor (GF) of 3.41 at strains below 10%, effective humidity sensing over 5–90% relative humidity, significant photothermal behavior showing temperature elevation from 32.7 to 65.8 °C at 1.0 W/cm² irradiation, and superior electrothermal performance reaching 64.1 °C at 2.25 V via Joule heating. These collective characteristics enable exceptional energy conversion efficiency and broad application prospects in multidimensional smart wearable devices, human–computer interactive systems, and human body thermal comfort management.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 42","pages":"20499–20508"},"PeriodicalIF":5.5,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145339582","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":"Molecular Beam Epitaxy of Graphene on Ge(100) for Applications in Microelectronics and Optoelectronics","authors":"Chiara Mastropasqua,&nbsp;, ,&nbsp;Mathieu Abel,&nbsp;, ,&nbsp;Filippo Fabbri,&nbsp;, ,&nbsp;Ileana Florea,&nbsp;, ,&nbsp;Mansour Aouassa,&nbsp;, ,&nbsp;Adrien Michon,&nbsp;, ,&nbsp;Antoine Ronda,&nbsp;, ,&nbsp;Mathieu Koudia,&nbsp;, ,&nbsp;Ismail Madaci,&nbsp;, and ,&nbsp;Isabelle Berbezier*,&nbsp;","doi":"10.1021/acsanm.5c02728","DOIUrl":"https://doi.org/10.1021/acsanm.5c02728","url":null,"abstract":"<p >The integration of graphene in silicon technology using a Ge buffer layer is of high interest for both fundamental science and device applications. Various studies have investigated the growth of graphene on germanium by chemical vapor deposition, a technique that has unique advantages for applications but is hard to understand due to the interplay of interrelated and complex physicochemical mechanisms. To further understand the mechanisms of growth and the interactions between the germanium substrate and the deposited carbon atoms, we use an ultrahigh-vacuum molecular beam epitaxy chamber equipped with a carbon atomic source. The structures are characterized using scanning transmission electron microscopy and Raman spectroscopy, as well as capacitance and photocurrent spectroscopies. Our results show that the high deposition temperature yields high-quality graphene with good uniformity. Although Raman spectra reveal a prominent defect peak attributed to the underlying germanium substrate, the graphene/Ge(001) structure still exhibits promising electrical and optoelectronic properties. Notably, the observed quantum capacitance and photocurrent responses highlight its strong potential for applications in microelectronics and optoelectronics.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 42","pages":"20177–20187"},"PeriodicalIF":5.5,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145339581","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":"Pristine Nanostructured α-Ni(OH)2 as a Nonenzymatic Electrochemical Strip Sensor for Trace Detection of Phenolic Compounds","authors":"Suman Mondal,&nbsp;, ,&nbsp;Aritra Roy,&nbsp;, ,&nbsp;Rene Pfeifer,&nbsp;, ,&nbsp;Felipe Fantuzzi*,&nbsp;, ,&nbsp;Amitava Choudhury*,&nbsp;, and ,&nbsp;Kalisadhan Mukherjee*,&nbsp;","doi":"10.1021/acsanm.5c03716","DOIUrl":"https://doi.org/10.1021/acsanm.5c03716","url":null,"abstract":"<p >Developing electrochemical sensors capable of detecting multiple analytes at distinct potentials is vital for applications in environmental, biomedical, and quality monitoring. Here, we explore nanostructured, nonenzymatic α-Ni(OH)₂ as a versatile sensing material for the selective detection of phenol, catechol, and <i>p</i>-nitrophenol using two platforms: a standard three-electrode system and a portable strip sensor. α-Ni(OH)₂ was synthesized via a wet-chemical method and coated onto glassy carbon and screen-printed carbon electrodes for the respective configurations. Electron microscopy confirmed semicrystalline nanoscale morphology (nanoparticulate films), and cyclic voltammetry revealed clear redox signatures for each analyte, enabling selective detection with distinct peak positions across both systems. The three-electrode setup reached limits of detection of 0.003 μM (phenol), 0.1 μM (catechol), and 1 μM (<i>p</i>-nitrophenol), whereas the portable sensor achieved 0.3, 1, and 2 μM, respectively. Amperometric measurements confirmed sensor performance at target potentials. Additionally, machine learning algorithms were applied to model signal behavior and support analyte classification. This combined approach demonstrates a robust strategy for sensitive, selective, and portable detection of multiple phenolic compounds.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 42","pages":"20463–20476"},"PeriodicalIF":5.5,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsanm.5c03716","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145339616","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":"Carbon Electrodes Coated with TiO2–Cu-MOF Composites for Nonenzymatic Detection of Ascorbic Acid","authors":"Sujitha Murugaiyan,&nbsp;, ,&nbsp;Mallikarjuna Swamy Shabanur Matada,&nbsp;, ,&nbsp;Guru Prasad Kuppuswamy,&nbsp;, ,&nbsp;Surya Velappa Jayaraman,&nbsp;, ,&nbsp;Corrado Di Natale*,&nbsp;, and ,&nbsp;Yuvaraj Sivalingam*,&nbsp;","doi":"10.1021/acsanm.5c02223","DOIUrl":"https://doi.org/10.1021/acsanm.5c02223","url":null,"abstract":"<p >Noninvasive and real-time monitoring of antioxidants such as ascorbic acid is essential in clinical diagnostics and food quality control. In this study, 3D-structured titanium dioxide (TiO₂)-integrated copper-based metal–organic frameworks (Cu-MOF) composite was coated onto carbon paper (CP) via the doctor blade method and employed as the sensing electrode in an extended gate field effect transistor (EGFET) configuration for ascorbic acid detection. The morphological analysis was carried out by high-resolution scanning electron microscope (HR-SEM) and high-resolution transmission electron microscope (HR-TEM), revealing that the 3D-structured, densely packed TiO₂ nanorods (∼16 nm in diameter) were integrated with octahedral Cu-MOF microstructures, further confirming the successful integration. The effective surface area of TiO₂–Cu-MOF/CP was estimated to be 48 cm². The sensing electrode (TiO₂–Cu-MOF/CP) achieved an limit of detection (LOD) of 12 nM and a wide detection range from 15 nM to 14.38 mM for ascorbic acid detection, with a sensitivity of 193.44 μA μM^–1 cm^–2. Additionally, the sensing electrode demonstrated good selectivity to interference from other mixed interfering molecules such as uric acid, dopamine, and glucose. In addition to the EGFET studies, Scanning Kelvin probe (SKP) measurements were performed to investigate the influence of ascorbic acid adsorption on the surface potential of the working electrode. The synergistic role of hierarchically structured TiO₂–Cu-MOF nanostructures enables an effective detection of ascorbic acid, which was further validated in real sample analysis using commercial pulpy orange juice.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 42","pages":"20164–20176"},"PeriodicalIF":5.5,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145339614","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":"Enhanced Detection of DNA Nucleobases Using a C2O Monolayer Nanodevice: Insights from First-Principles Analysis","authors":"Vasudeo Babar,&nbsp;, ,&nbsp;Sitansh Sharma*,&nbsp;, ,&nbsp;Abdul Rajjak Shaikh,&nbsp;, ,&nbsp;Romina Oliva,&nbsp;, ,&nbsp;Mohit Chawla,&nbsp;, and ,&nbsp;Luigi Cavallo*,&nbsp;","doi":"10.1021/acsanm.5c03183","DOIUrl":"https://doi.org/10.1021/acsanm.5c03183","url":null,"abstract":"<p >The detection of nucleobases is critical for enhancing DNA sequencing technologies. This study employs density functional theory (DFT) and nonequilibrium Green’s function (NEGF) methods to explore the adsorption behavior of natural DNA bases (adenine (A), thymine (T), guanine (G), and cytosine (C)) on a C₂O monolayer and to assess its electronic transport properties. Our results show that adsorption occurs predominantly via physisorption, characterized by minimal charge transfer and weak dispersion interactions, leading to the emergence of flat molecular bands near the conduction and valence band edges. Current–voltage (<i>I</i>–<i>V</i>) measurements reveal that current onset occurs around 2.5 V, with guanine exhibiting the highest current and cytosine causing the largest current reduction compared to the pure C₂O monolayer. Sensitivity analysis indicates that at 3.0 V, adenine achieves the highest current sensitivity (∼48%), while at 3.5 V, cytosine reaches peak sensitivity (∼60%). These sensitivity trends enable selective differentiation of nucleobases by tuning the applied voltage, highlighting the potential of C₂O monolayer-based nanodevices for voltage-dependent and -selective DNA base detection.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 42","pages":"20250–20260"},"PeriodicalIF":5.5,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145339626","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":"Enhanced Nonlinear Optical Responses of Nanoscale-Roughened Ag Wires via Spatially Extended Plasmonic Hotspots: Relevance to Optical Limiting Applications","authors":"Abhijith T*,&nbsp;, ,&nbsp;Om Prakash,&nbsp;, ,&nbsp;Sharafudeen Kaniyarakkal,&nbsp;, and ,&nbsp;Shiju Edappadikkunnummal*,&nbsp;","doi":"10.1021/acsanm.5c03959","DOIUrl":"https://doi.org/10.1021/acsanm.5c03959","url":null,"abstract":"<p >Utilizing the inherent plasmonic effects of metal nanostructures and thereby attaining superior nonlinear optical responses are strongly dependent on the spatial distribution of plasmonic hotspots. Herein, we developed Ag wires (AgWs) with roughened nanostructures on the surface with a size less than 100 nm to maximize the plasmonic effect formation toward enhancement in nonlinear optical responses. The plasmon resonance enabled near-field effects induced an effective nonlinear absorption coefficient, β_eff of 48.00 cm/GW at an input pulse energy of 30 μJ, when these surface-roughened AgWs (SR-AgWs) were evaluated using an open aperture <i>Z</i>-scan technique with Nd:YAG nanosecond laser pulses of wavelength of 532 nm, pulse width of 7 ns, and repetition rate of 10 Hz. This β_eff value was found to be 92% higher than that of the pristine AgWs at the same input pulse energy, indicating the importance of plasmonic hotspots in nonlinear optical activity. The finite-difference time-domain (FDTD) simulations confirmed the presence of plasmonic hotspots distributed throughout the surface of SR-AgWs with an <i>E</i>-field intensity enhancement factor (<i>|E|</i>²/<i>|E</i>₀<i>|</i>²) of more than 1000. The occurrence of these hotspots was further confirmed via obtaining surface-enhanced Raman scattering signals from a 0.1 μM concentration of rhodamine 6G molecules decorated over the surface of SR-AgWs. Moreover, the optical limiting plots indicated the low limiting threshold of 3.65 J/cm², which is found to be noteworthy compared with the previously reported benchmark values. Effective nonlinear absorption and nonlinear scattering were attributed to the observed optical limiting response. These findings highlight the importance of introducing plasmonic hotspots to achieve enhanced nonlinear optical responses with potential implications for optical limiting applications.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 41","pages":"20088–20095"},"PeriodicalIF":5.5,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145311867","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}