ACS Nano最新文献

{"title":"Assembling Polyhedral Metal–Organic Framework Superstructures by Bidirectional Shear","authors":"Wenrui Li,&nbsp;Zinan Huang,&nbsp;Zihan Xu,&nbsp;Zhen Hu,&nbsp;Junsong Wu,&nbsp;Lianbin Zhang,&nbsp;Jintao Zhu","doi":"10.1021/acsnano.6c10572","DOIUrl":"10.1021/acsnano.6c10572","url":null,"abstract":"<p>Colloidal superstructures with long-range order offera gatewayto emergent collective properties, yet achieving simultaneous translationaland orientational control over anisotropic polyhedral building blocksremains a formidable challenge. Here, we show that bidirectional shearenables the assembly of polyhedral colloidal superstructures. UsingZeolitic Imidazolate Framework-8 (ZIF-8) particles in a polymer matrix,alternating bidirectional shear fields, coupled with dynamic coordinationand hydrogen-bonding interactions, generate a viscoelastic regimethat aligns particles into facet-specific ordered lattices. This mechanismcouples translational and orientational ordering beyond that accessibleby conventional shear processing. The resulting large-area compositesuperstructures exhibit high-saturation structural colors with reflectanceintensities approaching 70%. The intrinsic microporosity of ZIF-8further enables <em>in situ</em> encapsulation of fluorescentguests, yielding films with integrated structural color and fluorescence.These orthogonal optical responses provide a platform for multilevelanticounterfeiting. This work establishes bidirectional shear as ageneral strategy for assembling anisotropic colloids into multifunctionalcomposite superstructures.</p>","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"20 41","pages":"27829–27840"},"PeriodicalIF":17.3,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149151187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbene-Mediated Stabilization of Reactive Copper–Chalcogenide Clusters: Defining the Operational Limits of Strong-Field Ligands in Multinuclear Nanoassemblies","authors":"Manuraj Kallumkal,Shelby T. Davis,Eryck García L.,Jan-Niklas Boyn,Gwendolyn A. Bailey","doi":"10.1021/acsnano.6c11379","DOIUrl":"https://doi.org/10.1021/acsnano.6c11379","url":null,"abstract":"Atomic precision in metal–sulfur assemblies offers a transformative pathway to programmable nanomaterials, with applications spanning energy-efficient optoelectronics to highly selective CO2 reduction catalysis. However, the inherent lability of the metal–sulfur bond remains a formidable barrier to the rational design of robust frameworks. While strong-field ligands such as cyclic (alkyl)(amino)carbenes (CAACs) are gold-standard scaffolds for stabilizing reactive monometallic centers, their impact on the structural fidelity of multinuclear clusters remains elusive. Herein, we report a combined experimental and theoretical investigation of a CAAC-supported Cu8(μ3-S)4 cluster─a high-impact prototype for metal-chalcogenide systems with relatively weak metal–sulfur bonds. Through electrochemical and protonation studies, we demonstrate that while the potent σ-donor ability of the CAAC ligand successfully enforces solution integrity and thermal resilience, the structural boundaries of the multinuclear scaffold under chemical stress are ultimately governed by the core topology and metal–sulfur bond lability rather than local metal–ligand bonding. In-depth density functional theory (DFT) analysis demonstrates that while the CAAC ligands actively strengthen the peripheral Cu–S bonds via a pronounced inverse trans influence, the trigonal pyramidal (μ3-S) motifs remain vulnerable to proton-induced bond labilization and oxidative S–S coupling. Our findings establish that the design rules for multinuclear assemblies diverge fundamentally from monometallic species: whereas CAACs successfully passivate peripheral coordination sites to thermal decomposition, they do not preclude internal, core-mediated degradation pathways. These clear boundaries reveal that achieving structural durability in functional base metal–sulfur assemblies requires pairing strong local donors with supramolecular and/or multidentate ligand strategies designed explicitly to buttress the metal–sulfur core.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"7 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149218810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ferroelectric Switching of Skyrmion Topology in 2D Multiferroics","authors":"Xu Wang,Kaiying Dou,Xiudong Wang,Junhuang Yang,Ying Dai,Baibiao Huang,Xinru Li,Yandong Ma","doi":"10.1021/acsnano.6c14517","DOIUrl":"https://doi.org/10.1021/acsnano.6c14517","url":null,"abstract":"Deterministic switching of skyrmion topology is a central frontier in topological spintronics, yet current paradigms rely almost exclusively on dissipative-current-driven spin torques. Here, we propose a fundamentally distinct mechanism for the nonvolatile switching of the skyrmion topology in two-dimensional multiferroics. We reveal that the intrinsic magnetoelectric coupling intimately links the out-of-plane ferroelectric polarization to interlayer magnetic exchange. Consequently, an electric-field-driven polarization reversal deterministically converts the interlayer coupling between the ferromagnetic and antiferromagnetic states. This macroscopic exchange reversal directly flips the microscopic skyrmion core polarity and reverses its topological charge, thereby stabilizing the two electrically addressable topological phases. Guided by our established design principles, we rigorously validate this mechanism in a Co2CF2/MoN2 multiferroic heterostructure by using combined first-principles calculations and atomistic spin simulations. Our findings bypass the limitations of continuous current injection, establishing a robust physical framework for energy-efficient multiferroic topological spintronics.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"16 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149210850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Frustrated Lewis Pair Engineered Metal–Organic Frameworks for Enhancing Peroxidase Mimicking","authors":"Xinliu Tan,Fengxu Yu,Yuanqian Xiong,Xuanang Shen,Yuxin Lei,Lei Yang,Annika Yam,ZhangSheng Shi,Xiaolin Huang,Yonghua Xiong","doi":"10.1021/acsnano.6c13503","DOIUrl":"https://doi.org/10.1021/acsnano.6c13503","url":null,"abstract":"Natural enzymes achieve catalytic efficiency through the synergistic coupling of substrate activation and the efficient utilization of reactive intermediates. However, current nanozyme design paradigms focus predominantly on modulating substrate activation while overlooking the efficient utilization of highly reactive intermediates─a limitation that severely constrains substantial gains in catalytic activity. Inspired by the frustrated Lewis pair (FLP) composition of Fe2+ and tetrahydrobiopterin in tryptophan hydroxylase, we propose an FLP engineering approach to integrate 2,5-pyrazine-dicarboxylic acid (Pz) into the Materials of Institut Lavoisier-101 metal–organic framework (MIL-101(Fe)-H MOF) to construct MIL-101(Fe)-Pz MOF. This construct features pyrazine-nitrogen as a Lewis base and unsaturated Fe sites as Lewis acids. Compared with the Lewis acid-only MIL-101(Fe)-H MOF control, the as-fabricated FLP substantially accelerated the peroxidase-like activity of MIL-101(Fe)-Pz MOF, increasing the maximum reaction velocity by 4.83-fold when H2O2 was used as the substrate and by 17.88-fold when 3,3′,5,5′-tetramethylbenzidine (TMB) was used as the substrate. Combined experimental and theoretical analyses revealed that the distinct electronic interactions within FLP facilitate electron transfer, promote H2O2 activation, improve hydroxyl radical utilization, and lower the reaction energy barrier, thereby boosting the reaction kinetics. This work highlights the indispensable role of substrate activation and active intermediate utilization in enhancing nanozyme performance and also provides guidance for the design of next-generation bioinspired nanozymes.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"25 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149210849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction to “Cellular Transmigration Increases Nanoparticle Penetration Into Solid Tumors”","authors":"Stefan M. Mladjenovic,Atta C. Y. Chang,Colin Blackadar,Qin Ji,Ayokunle A. Lekuti,Sara Ahmed,Warren C. W. Chan","doi":"10.1021/acsnano.6c16428","DOIUrl":"https://doi.org/10.1021/acsnano.6c16428","url":null,"abstract":"","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"64 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149218803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unfolding of Field-Free Spin–Orbit Torque Magnetization Switching in a van der Waals Heterostructure","authors":"Niklas Kercher,Paul Noël,Emir Karadža,Pietro Gambardella","doi":"10.1021/acsnano.6c10331","DOIUrl":"https://doi.org/10.1021/acsnano.6c10331","url":null,"abstract":"Heterostructures of 2D materials offer high tunability of magnetic properties, including current-induced magnetization switching by unconventional spin–orbit torques. The microscopic mechanisms governing spin-torque switching in van der Waals systems, however, remain insufficiently understood. Here, we investigate current-induced magnetization reversal in an Fe3GeTe2 (FGT) and WTe2 heterostructure using scanning harmonic magneto-optical Kerr effect microscopy. Spatially resolved magnetization maps show that field-free switching unfolds from asymmetric domain nucleation at the edges of the FGT flake, followed by domain wall propagation. This switching behavior is deterministic and bipolar, consistent with spin–orbit torques arising from the injection of both in-plane and out-of-plane spins from WTe2 into FGT. The critical currents for up-to-down and down-to-up switching differ because of asymmetric domain nucleation and directional domain wall pinning effects. Micromagnetic simulations reproduce the switching behavior observed experimentally, showing how the initial domain nucleation sites are determined by the sample geometry and combined influence of in-plane and out-of-plane spins and Dzyaloshinskii-Moriya interaction. Finally, by systematically varying the field-like and damping-like torque components and sweeping the spin polarization between in-plane and out-of-plane, we identify the torque configurations that yield the most efficient switching in van der Waals magnets with different shapes.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"62 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149218799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing Capacitance by Increasing Electric Double Layer Disorder in Ionic Liquid Mixtures","authors":"Hrishikesh Tupkar,Samuel G. Johnstone,Sila Alemdar,Jack McAlpine,Jack Verich,Matthew A. Gebbie","doi":"10.1021/acsnano.6c12577","DOIUrl":"https://doi.org/10.1021/acsnano.6c12577","url":null,"abstract":"Supercapacitors, possessing rapid charge–discharge time scales and cycle lifetimes, provide opportunities to mitigate fluctuations from intermittent energy sources. However, while supercapacitors exhibit lower energy densities to lithium-ion batteries, advancing supercapacitor energy density is necessary to improve their utility in applications requiring rapid operating time scales. Supercapacitor energy densities critically hinge on interfacial capacitances and electrolyte voltage windows. Ionic liquids have been heavily investigated as supercapacitor electrolytes due to promising properties like high electrochemical stability, nonflammability, and nonvolatility. Yet, energy densities of ionic liquid-derived supercapacitors are often limited by low interfacial capacitances due to pronounced ion–ion correlations. Here, we show capacitance can be significantly enhanced in ionic liquids over wide voltages by mixing ionic liquids to improve electric double layer entropy. Importantly, capacitance increases exhibited by mixtures persist over the entire electrochemical stability window, showing like-charged co-ions often play similar roles to oppositely charged counterions when determining double layer capacitance. By leveraging electrochemical impedance spectroscopy and surface forces measurements, we conclude that capacitive enhancements originate from changes in short-range nanostructures in ionic liquids, where atomic force microscopy measurements reveal that mixing ionic liquids results in more compact bound ion layers with increased disorder and compressibility. Notably, we find that long-range decay lengths are statistically similar between neat ionic liquids and an equimolar mixture at potentials where we report up to 150% capacitance enhancement, indicating decoupling between the bulk electrostatic decay length and interfacial capacitance. Overall, our results reveal that modulating compositional entropy of ionic liquid double layers provides avenues to increase supercapacitor energy densities and advance next-generation energy storage.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"16 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149218874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental Design\u0000Signatures Emerge from Topic Modeling\u0000of Graphene Oxide Literature","authors":"Henry J. Kobs,Henrique Ferreira,Liu Yang,Amauri J. Paula,Carlos E. Andrade,Andreia F. Faria","doi":"10.1021/acsnano.6c04548","DOIUrl":"https://doi.org/10.1021/acsnano.6c04548","url":null,"abstract":"Abstract The literature on graphene oxide (GO) comprises hundreds of thousands of publications spanning synthesis, characterization, and applications in diverse domains. Advancing GO materials requires a structured knowledge map derived from systematic mining of this extensive corpus. However, extracting meaningful insights from this vast, heterogeneous, sparse, and unstructured data remains a challenge. To address this challenge, Natural Language Processing techniques, including topic modeling, community discovery, and parameter extraction, are here employed to establish a framework. Latent Dirichlet Allocation (LDA) was applied to the full text of more than 120,000 articles, enabling the identification of eight macro-domains within the GO literature, and neural topic modeling was subsequently employed to characterize the granularity and heterogeneity of these domains. Parameter extraction was performed using Large Language Models (LLMs) on a subset of 8000 full-text articles, with a proto-ontology incorporated into the extraction prompt. Even with a broad prompt, an F1 score of 94% was achieved against manual validation. The extracted parameters were then clustered through community modeling and compared with the LDA-derived topics. At this intermediate resolution of the literature, we demonstrate the application of a recommendation system for relevant parameters according to the material family and application domain. The applicability of the framework at higher resolutions was further demonstrated through the construction of a data set of CO2 adsorption for graphene- and GO-based materials. This data set was subsequently employed in a downstream predictive case study using an Extremely Randomized Trees Regressor, with different training-test splitting strategies evaluated to assess in-domain and out-of-domain generalization at article-level resolution.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"16 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149209889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Data-Driven Flipping\u0000Engineering for High Thermal\u0000Anisotropy in Janus Two-Dimensional Materials","authors":"Xin Wu,Ting Liang,Weitao Wang,Jiangjiang Ma,Zheyong Fan,Jianbin Xu,Sebastian Volz,Masahiro Nomura","doi":"10.1021/acsnano.6c07922","DOIUrl":"https://doi.org/10.1021/acsnano.6c07922","url":null,"abstract":"Abstract The vertical integration of heterogeneous dies in three-dimensional integrated circuits demands materials with extreme thermal anisotropy to dissipate heat in-plane while suppressing cross-plane leakage. Randomly twisted van der Waals stacks can enhance anisotropy, but their stochastic nature lacks precise control. Here, we report flipping engineering in Janus MoSSe stacks, exploiting the intrinsic asymmetry between the S–Mo–Se and Se–Mo–S terminations as a programmable structural degree of freedom orthogonal to twisting. By integrating machine-learned potential molecular dynamics with Bayesian optimization for a 14-layer MoSSe stack, we identify a structure with strongly suppressed effective cross-plane thermal conductivity of 0.082 ± 0.002 W m–1 K–1 at 300 K while maintaining robust in-plane conduction, yielding an anisotropy ratio of about 760 and 35% higher than the crystalline reference. This effect arises from flipping-induced breaking of stacking periodicity, which perturbs midfrequency phonons (2–8 THz) and leads to band splitting and nearly flat, layer-localized modes. These changes reduce the cross-plane propagating channels and thus weaken their contribution to thermal transport, while their impact on in-plane transport dominated by low-frequency acoustic phonons is negligible. Flipping engineering thus provides programmable stacking-sequence strategy and a versatile route for designing anisotropic properties in layered materials.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"24 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149209920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanopore Signatures\u0000of High-Molecular-Weight Polysaccharides\u0000with Recurring Structural Motifs","authors":"Wenzheng Li,Yunqi Xiao,Xinmeng Gao,Panke Zhang,Shuo Huang,Kefan Wang","doi":"10.1021/acsnano.6c07846","DOIUrl":"https://doi.org/10.1021/acsnano.6c07846","url":null,"abstract":"Abstract Polysaccharides in nature possess profound biological significance, and their structural complexity renders them of great research value. However, the structural heterogeneity of complex polysaccharides has long posed a great challenge for analysis. Here, a nanopore profiling strategy was developed for polysaccharide characterization. Experimentally, polysaccharides are hydrolyzed into informative fragments, and the distribution of their resulting nanopore events forms a unique profile that serves as a reliable molecular signature. Seven distinct polysaccharides, including xanthan gum, gum arabic, agarose, sodium alginate, gellan gum, heparin, and chondroitin sulfate A, were successfully identified and discriminated. A profile-based machine learning classifier was also developed, which utilizes the overall distribution profile of fragment events as training input, yielding 100% validation accuracy. Further application of the fully constrained least-squares (FCLS) algorithm enabled accurate quantification of polysaccharide mixture composition, allowing for unambiguous analysis of mixtures of polysaccharides in the same assay. Collectively, this work establishes a universal, label-free, and high-resolution framework for decoding the structural complexity of polysaccharides.","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"236 1","pages":""},"PeriodicalIF":17.1,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149209888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}