ACS Applied Nano Materials最新文献

{"title":"Enhancing Magnetic Hyperthermia Efficiency in Pd/Fe-Oxide Hybrid Nanoparticles through Mn-Doping","authors":"Alexandra Maier,&nbsp;Qi Jia,&nbsp;Keshav Shukla,&nbsp;Achim Iulian Dugulan,&nbsp;Peter-Leon Hagedoorn,&nbsp;Rogier van Oossanen,&nbsp;Gerard van Rhoon,&nbsp;Antonia G. Denkova and Kristina Djanashvili*,&nbsp;","doi":"10.1021/acsanm.4c0545210.1021/acsanm.4c05452","DOIUrl":"https://doi.org/10.1021/acsanm.4c05452https://doi.org/10.1021/acsanm.4c05452","url":null,"abstract":"<p >Multifunctional, biocompatible magnetic materials, such as iron oxide nanoparticles (IONPs), hold great potential for biomedical applications including diagnostics (e.g., MRI) and cancer therapy. In particular, they can play a crucial role in advancing cancer thermotherapy by generating heat when administered intratumorally and when exposed to an alternating magnetic field. This heat application is often combined with radio- (chemo)therapy and/or imaging. Consequently, the design of materials for such a multimodal approach requires hybrid nanoparticles that retain their magnetic properties while integrating additional functionalities. This work introduces synthesis and investigation of magnetically enhanced nanoparticles with a palladium core (envisioned for future radiolabeling with therapeutic ¹⁰³Pd) and a magnetic iron oxide shell containing paramagnetic manganese (Pd/Fe|(nMn)-oxide, <i>n</i> = 0.25 and 0.5). Doping the iron oxide lattice with Mn significantly increases magnetic saturation, boosting specific loss power up to 1.7 times compared to that of undoped analogs. Interestingly, higher Mn-content in Pd/Fe|(0.5Mn)-oxide leads to a pronounced Mn outer rim, enhancing the heating efficiency at 346 kHz and 23 mT and contributing to the water exchange on the surface of the paramagnetically doped nanoparticles, resulting in additional <i>T</i>₁ MRI contrast. The enhanced magnetic properties of the hybrid Pd/Fe|Mn-oxide nanoparticles enable effective therapeutic outcomes with injection of only small quantities of the material, offering great potential for effective cancer treatment strategies that combine hyperthermia/thermal ablation with radiotherapy while allowing for real-time monitoring via MRI.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27465–27475 27465–27475"},"PeriodicalIF":5.3,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsanm.4c05452","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142850431","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":"Rubidium- and Copper-Doped CeO2 Nanorods for the Oxidative Coupling of Anilines","authors":"Peiwen Ju,&nbsp;Hui Zhong,&nbsp;Zhiguo He* and Weiqi Xie*,&nbsp;","doi":"10.1021/acsanm.4c0571210.1021/acsanm.4c05712","DOIUrl":"https://doi.org/10.1021/acsanm.4c05712https://doi.org/10.1021/acsanm.4c05712","url":null,"abstract":"<p >The catalytic production of aromatic azo compounds by aniline’s oxidative coupling process is significant in organic synthesis. However, the catalysts used in this method generally exhibit low selectivity for the desired products and need costly preparation methods. In this study, for the first time, we proposed a species regulation strategy to synthesize the Rb-doped Cu/CeO₂ nanorod catalyst, which showed high conversion (98%) and selectivity (95%) toward oxidative coupling of aniline to azoxybenzene using H₂O₂ as the oxidant. Aniline radical ion trapping experiments demonstrated that the oxidative coupling of aniline to azoxybenzene follows a nitrosobenzene intermediate mechanism. Characterization studies revealed that the addition of Rb not only enhances the interaction between Cu species and CeO₂ but also increases oxygen vacancy content. DFT calculations indicate that the Cu–Ce and Rb–Ce interfaces are the main active sites, offering excellent catalytic performance. The reusability test for five cycles shows good stability of a Rb–Cu/CeO₂ nanorod catalyst. The study provides a promising species regulation strategy for Rb-promoted nanocatalysts with ultrahigh selectivity, expanding their applicability in oxidative coupling and related reactions.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27656–27667 27656–27667"},"PeriodicalIF":5.3,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142849972","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":"Iron Sulfide Quantum Dots Decorated on Porous N-Doped Carbon for Lithium/Sodium-Ion Storage","authors":"Shuoyu Wang,&nbsp;Xiongfeng Lin,&nbsp;Weizhou Chai,&nbsp;Wen Yu,&nbsp;Binglin Zhang,&nbsp;Li Li* and Hongkang Wang*,&nbsp;","doi":"10.1021/acsanm.4c0495110.1021/acsanm.4c04951","DOIUrl":"https://doi.org/10.1021/acsanm.4c04951https://doi.org/10.1021/acsanm.4c04951","url":null,"abstract":"<p >Iron sulfide is considered a potential anode material for lithium- and sodium-ion batteries (LIBs/SIBs) in view of its natural abundance and high theoretical specific capacity. Nevertheless, a large volume expansion and relatively poor electronic conductivity have hindered its application. Herein, a unique composite with iron sulfide quantum dots decorated on N-doped porous carbon hierarchical frameworks (FeS@NC) is constructed via a vulcanization-carbonization strategy. The confined size of iron sulfide dots and the designed porous structure of carbon frameworks effectively alleviate the volume expansion issue upon ion insertion, while the N-doped carbon matrix efficiently enhances the electrode conductivity. Consequently, the presented FeS@NC composite exhibits excellent lithium/sodium storage performance. For LIBs, the FeS@NC electrode shows discharge capacities of 844.2 mAh/g at 0.5 A/g after 300 cycles and 578.9 mAh/g at 5 A/g in the rate test. Moreover, it delivers a high discharge capacity of 460.7 mAh/g after 350 cycles at 1 A/g for SIBs.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"26970–26977 26970–26977"},"PeriodicalIF":5.3,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142842655","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":"Graphene/Trione Covalent-Organic-Frameworks Nanocomposite: Complementarity in Structure and Properties Improving Tribological Behaviors of PEG Base Oil","authors":"Bo Zhao,&nbsp;Hongyang Wang,&nbsp;Rui Dong,&nbsp;Rong Ma,&nbsp;Ping Wen* and Mingjin Fan*,&nbsp;","doi":"10.1021/acsanm.4c0531010.1021/acsanm.4c05310","DOIUrl":"https://doi.org/10.1021/acsanm.4c05310https://doi.org/10.1021/acsanm.4c05310","url":null,"abstract":"<p >Native defects of a single nanomaterial in properties and structure inevitably cripple its lubrication performance, when served as lubricant additives. In this work, manipulating the content of graphene to prepare the graphene/trione covalent-organic-frameworks (Ton-COFs; GTCC) nanocomposites has first come true the complementarity in structure and properties to enhance lubrication performance. Specifically, we apply graphene layers as a template whereon the Ton-COFs could grow into even and integral sheets at a well-screened graphene content, and the balance between the rigidity of Ton-COFs and the flexibility of graphene is also achieved, which enables the GTCC nanoadditive to self-adapt and cover over the rubbing surface as shapable as possible, forming a protective lubrication film. Besides, the strong affinity to metal of the polar groups and electron-rich heterocycle in Ton-COFs further consolidates the binding of the lubrication film. Eventually, with the assistance of the high mechanical strength of graphene and the incommensurate effect of the heterostructure, the GTCC nanocomposite with the content of graphene (75 mg) as the additive exhibits the optimal tribological performance, reducing friction by 33% and decreasing the wear volume by 96%, compared to that of poly(ethylene glycol) 400 base oil. This finding provides a strategy to promote the application of COFs as nanoadditives in practical lubrication.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27344–27354 27344–27354"},"PeriodicalIF":5.3,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142842567","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":"An Ab Initio Study of the Effect of Strain on the Permeability of N2 and CO2 in N-Graphdiyne: Implication for Gas-Selective Membranes","authors":"Yunan Wang,&nbsp;Guochao Sun,&nbsp;Jing Guan,&nbsp;Yong-Qiang Li,&nbsp;Yanmei Yang,&nbsp;Mingwen Zhao,&nbsp;Weifeng Li* and Yuanyuan Qu*,&nbsp;","doi":"10.1021/acsanm.4c0536610.1021/acsanm.4c05366","DOIUrl":"https://doi.org/10.1021/acsanm.4c05366https://doi.org/10.1021/acsanm.4c05366","url":null,"abstract":"<p >Utilizing nanoporous membranes for efficient CO₂/N₂ separation presents a promising strategy for addressing climate change and related environmental issues. In this work, we employed first-principles calculations and molecular dynamics simulations to investigate the separation efficiency between CO₂ and N₂ of the rhombic N-Graphdiyne (<i>r</i>-N-GDY) monolayer under uniaxial tensile strain. Our simulation results demonstrate that, at room temperature, strain applied in the zigzag direction of the <i>r</i>-N-GDY membrane enables efficient CO₂ separation from N₂. At strains between 3 and 3.5%, the membrane exhibits ultrahigh selectivity ranging from 1.4 × 10³ to 2.9 × 10⁴ for CO₂/N₂, alongside superior CO₂ permeance of approximately 1.3 × 10^–4 ∼ 1.3 × 10^–3 mol m^–2 s^–1 Pa^–1, likely due to the enhanced confinement of the nanopore to N₂ molecules under strain. This is supported by quantitative free energy barrier calculations, which indicate that the outstanding separation performance originates from higher energy barriers for N₂ (i.e., 47.3 kJ/mol at 3.5%) compared to lower energy barriers for CO₂ (i.e., 19.3 kJ/mol at 3.5%) under equivalent strain levels. Additionally, density of states analysis reveals significantly enhanced high-frequency rotational modes for both N₂ and CO₂ under strain along the short axis of the nanopore, indicating that the confinement is primarily imposed by the negatively charged nitrogen atoms defining this axis. In conclusion, this study proposes the <i>r</i>-N-GDY monolayer, as a strain-tunable, high-performance material for the efficient separation of CO₂ from N₂. The findings highlight the potential of using strain engineering to enhance membrane separation technologies, offering a significant advancement toward sustainable and effective gas separation solutions.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27355–27364 27355–27364"},"PeriodicalIF":5.3,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142842568","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":"Monodisperse Cu Nanoparticles Supported on a Versatile Metal–Organic Framework for Electrocatalytic Reduction of CO2","authors":"R. Eric Sikma,&nbsp;Raphael A. Reyes,&nbsp;Danielle Richards,&nbsp;Paul G. Kotula,&nbsp;Melissa L. Meyerson,&nbsp;David P. Schafer,&nbsp;Jessica K. Romàn-Kustas,&nbsp;Stephen J. Percival and Dorina F. Sava Gallis*,&nbsp;","doi":"10.1021/acsanm.4c0550810.1021/acsanm.4c05508","DOIUrl":"https://doi.org/10.1021/acsanm.4c05508https://doi.org/10.1021/acsanm.4c05508","url":null,"abstract":"<p >Rare-earth metal–organic frameworks (REMOFs) based on polynuclear metal clusters are an emerging class of materials that have shown promise for CO₂ capture and conversion. In this work, copper nanoparticles (CuNPs) were successfully installed on a cluster-based Y(III) MOF to yield a composite material, CuNP-Y-TBAP. The abundance of Cu binding sites on the Y(III) clusters allowed a remarkably high Cu loading to be achieved, and electron microscopy demonstrated that the MOF-supported CuNPs are exceptionally small and monodisperse. CuNP-Y-TBAP was found to be an active heterogeneous catalyst for electrochemical reduction of CO₂, yielding CO and CH₄ as the primary CO₂ reduction products.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"26629–26635 26629–26635"},"PeriodicalIF":5.3,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142849908","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":"Nanoscale Engineering of Wurtzite Ferroelectrics: Unveiling Phase Transition and Ferroelectric Switching in ScAlN Nanowires","authors":"Ding Wang,&nbsp;Ping Wang,&nbsp;Shubham Mondal,&nbsp;Mingtao Hu,&nbsp;Yuanpeng Wu,&nbsp;Danhao Wang,&nbsp;Kai Sun and Zetian Mi*,&nbsp;","doi":"10.1021/acsanm.4c0454910.1021/acsanm.4c04549","DOIUrl":"https://doi.org/10.1021/acsanm.4c04549https://doi.org/10.1021/acsanm.4c04549","url":null,"abstract":"<p >The pursuit of extreme device miniaturization and the exploration of associated physical phenomena has spurred significant interest in crystallographic phase control and ferroelectric switching in reduced dimensions. The recently discovered wurtzite ferroelectrics offer intriguing piezoelectric and ferroelectric properties, CMOS compatibility, and seamless integration with mainstream semiconductor technology. In this study, we present a comprehensive investigation of the crystallographic phase transition of ScAlN nanowires across the full Sc compositional range. While a gradual transition from wurtzite to cubic phase was observed with increasing Sc composition, we further demonstrate that a highly ordered wurtzite phase ScAlN can be confined at the ScAlN/GaN interface for Sc contents surpassing what is possible in conventional films. We provide the first evidence of ferroelectric switching in ScAlN nanowires, a result that holds significant implications for future device miniaturization. Our demonstration of tunable ferroelectric ScAlN nanowires opens new possibilities for nanoscale, domain, alloy, strain, and quantum engineering of wurtzite ferroelectrics, representing a significant stride toward the development of next-generation, miniaturized devices based on wurtzite ferroelectrics.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"26756–26764 26756–26764"},"PeriodicalIF":5.3,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142849967","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":"Scalable Deposition of MoS2 Thin Films with Controlled Doping for Photodetectors","authors":"Rosy Rahman,&nbsp;Riya Sadhukhan,&nbsp;Subhadip Ghosh,&nbsp;Dipak Kumar Goswami and Tapan Kumar Nath*,&nbsp;","doi":"10.1021/acsanm.4c0172910.1021/acsanm.4c01729","DOIUrl":"https://doi.org/10.1021/acsanm.4c01729https://doi.org/10.1021/acsanm.4c01729","url":null,"abstract":"<p >Molybdenum disulfide (MoS₂), the most widely explored transition metal dichalcogenide, is a promising candidate for developing high-performance photodetectors due to having a wide range of electric and optoelectronic properties. However, the controlled synthesis of a highly crystalline large-area MoS₂ thin film and the effect of noble metal (Au, Ag) nanoparticles and TM (Co) ion doping on its photoelectrical properties are still challenging. Herein, we report the direct growth of wafer-scale MoS₂ thin films utilizing a facile polymer-free approach by a solution-phase coating process, followed by thermal annealing. A systematic study on the photoelectrical properties of the Au-, Ag-, and Co-doped (all variants are in 10 at. wt %) MoS₂ photodetectors reveals that the Co-MoS₂ device exhibits excellent photoresponse properties, which are also evidenced theoretically. Moreover, the Co-dopant amount is varied (5, 20 at. wt %) to decipher the impact of Co-doping on the photoresponse properties and determine the optimum doping percentage. The highest (20 at. wt %) Co-doped MoS₂ photodetector exhibits good photoresponse characteristics at low voltage with minimal noise and high stability (retaining 86% of its photoresponsivity after the 30th day), attributed to the long-lived trap states, the photogating effect, more n-type doping, and generation of more charge carriers. Interestingly, the variations in Co-dopant concentrations lead to tunable photoresponse in different (blue, green, and red) laser illuminations, attributed to the band gap tunability with variable doping. This simple TM doping approach proposed in this study for improving the performance of MoS₂ photodetectors can open up an avenue for research for other 2D materials, finding potential applications in photodetection and low-voltage-based operating devices.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"26654–26671 26654–26671"},"PeriodicalIF":5.3,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142842473","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":"Gold Nanocluster–Molybdenum Disulfide Nanosheet Couple-Based Immunoassay Probe for the Selective Detection of Glial Fibrillary Acidic Protein (GFAP)─A Biomarker for Ischemic Stroke","authors":"Susan Varghese,&nbsp;Anju S. Madanan,&nbsp;Merin K. Abraham,&nbsp;Ali Ibrahim Shkhair,&nbsp;Geneva Indongo,&nbsp;Greeshma Rajeevan,&nbsp;Arathy B. K. Kala and Sony George*,&nbsp;","doi":"10.1021/acsanm.4c0560710.1021/acsanm.4c05607","DOIUrl":"https://doi.org/10.1021/acsanm.4c05607https://doi.org/10.1021/acsanm.4c05607","url":null,"abstract":"<p >Stroke, an incapacitating cerebrovascular catastrophe, imposes significant socio-economic burdens by affecting individuals, families, and society at large. Ischemic stroke (IS) particularly disrupts the cerebral blood flow, causing vascular compromise and neurological impairment. The present study introduces a fluorescence immunoassay platform for detecting glial fibrillary acidic protein (GFAP), a critical marker responsive to IS. Employing molybdenum disulfide nanosheet (MoS₂ NS) as a quencher upon GFAP antibody-conjugated bovine serum albumin-capped fluorescent gold nanoclusters (MoS₂@Ab@AuNCs), the developed assay demonstrates robust detection capabilities. The platform exhibits a linear detection range from 31.15 to 447.76 pg/mL with a detection limit of 1.30 pg/mL. Selectivity and sensitivity assessments against coexisting biomolecules and ions validate the reliability of the probe. Furthermore, feasibility studies using real serum samples confirm its applicability in clinical settings. Additionally, a paper strip-based, cost-effective platform is introduced for rapid GFAP detection, facilitating broader accessibility and utility.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27579–27590 27579–27590"},"PeriodicalIF":5.3,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142842137","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":"Stamping-Assisted Cavity Enhancement of Ag Nanoparticle Films for SERS-Based Sensing","authors":"Gang Lou,&nbsp;Sencer Ayas,&nbsp;Said Mikki and Kemal Celebi*,&nbsp;","doi":"10.1021/acsanm.4c0606810.1021/acsanm.4c06068","DOIUrl":"https://doi.org/10.1021/acsanm.4c06068https://doi.org/10.1021/acsanm.4c06068","url":null,"abstract":"<p >Surfaces composed of self-assembled metal nanoparticles, prepared by physical vapor deposition, can generate lithography-free, pristine and easily scalable substrates for surface-enhanced Raman scattering (SERS). These substrates exhibit remarkable SERS enhancement factor (EF) spanning several orders of magnitude. In this study, we present a facile method to achieve further amplification of these EF values through formation of a Fabry–Perot cavity, which effectively enhances the field around the nanoparticles through constructive interference. We have observed that this enhancement by a quarter-wave Fabry–Perot cavity is superior to a near-field enhancement by a plasmonically coupled metallic mirror within a few nm proximities of a metal nanoparticle layer. Using Ag nanoparticles on a 90 nm thick SiO₂ spacer with a metallic mirror, a SERS EF of 1.3 × 10¹⁰ with a detection limit down to 10^–13 M was observed. Furthermore, we have observed even a simpler far-field cavity supporting only specular reflections can yield a 5-fold gain compared to a standalone nanoparticle-on-glass SERS substrate. Based on this observation we have designed a low-cost, reusable mirror platform that can be dry stamped on an Ag nanoparticle coated glass coverslip, yielding a SERS EF of 5.3 × 10⁹ with a detection limit down to 10^–12 M. Such a stamped mirror platform serves a dual purpose. It acts as an external element to enhance the capabilities of any SERS substrate with a flat surface, and also as a long-term protective barrier against airborne contaminants that can degrade the Raman signal quality.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"7 23","pages":"27761–27768 27761–27768"},"PeriodicalIF":5.3,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142849884","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}