ACS Nanoscience Au最新文献

{"title":"Toward Simplified Electrode Design: Development of Nickel-Efficient Catalytic NanoPTL for Sustainable AEM Water Electrolysis","authors":"Seungyoung Park,&nbsp;Seulgi Ji,&nbsp;Sara Andrenacci,&nbsp;Sun Sook Lee,&nbsp;Yejung Choi","doi":"10.1021/acsnanoscienceau.5c00168","DOIUrl":"10.1021/acsnanoscienceau.5c00168","url":null,"abstract":"<p>Nickel-based poroustransport layers (PTLs) are widely used inanion exchange membrane water electrolysis (AEMWE) owing to theirchemical stability in alkaline media, electrical conductivity, andefficient transport of gases and electrolyte. However, the risingcost and supply concerns of nickel necessitate more material-efficientsolutions. This study introduces a freestanding, bifunctional catalyticNi nanoPTL for AEMWE, synthesized via magnetically assisted chemicalreduction. By tuning the nanowire morphology through seed concentration,the nanoPTL achieves up to 90% nickel reduction while enhancing thesurface area and mechanical robustness. Electrochemical and structuralanalyses reveal strong morphology–activity correlations, withthe nanoPTL outperforming commercial benchmarks in the hydrogen evolutionreaction (HER) and showing promising oxygen evolution reaction (OER)performance. Single-cell tests confirm the stability and integrationpotential of the nanoPTL, underscoring both its potential and areasfor improvement toward cost-effective, sustainable, and high performanceAEMWE electrode design.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 3","pages":"369–378"},"PeriodicalIF":7.5,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148296540","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}

{"title":"TiO2 Nanoparticles Enabling Photocatalytic Desulfurization for C–C Coupling Reaction Using Visible Light","authors":"Shea Stewart,&nbsp;Matas Simukaitis,&nbsp;H. Christopher Fry,&nbsp;Chengjun Sun,&nbsp;Yugang Sun","doi":"10.1021/acsnanoscienceau.6c00020","DOIUrl":"10.1021/acsnanoscienceau.6c00020","url":null,"abstract":"<p>We uncover a surface-mediatedmechanism for visible-light-drivenphotocatalytic desulfurization of thiols on titanium dioxide (TiO₂) nanoparticles under LED illumination (&gt;420 nm). Combineddiffuse reflectance, infrared, and cryogenic electron paramagneticresonance spectroscopy verify the formation of a surface thiol–Ticharge-transfer complex that introduces visible-light absorption intoan otherwise UV-active reaction system. Selective photoexcitationof this surface complex drives interfacial charge transfer, directlyactivating the adsorbed thiol and inducing C–S bond scissionwithout the band gap excitation of TiO₂. The resultingcarbon-centered radical intermediates are intercepted by styrene toform C–C coupling products. These results uncover a distinctsurface-mediated photocatalytic mechanism in which charge-transfercomplex formation governs both light absorption and chemical activation,providing a mechanistic framework for extending visible-light reactivityto wide-bandgap metal oxide photocatalysts.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 3","pages":"363–368"},"PeriodicalIF":7.5,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148296505","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}

{"title":"Synergistic Charge Redistribution and Structural Evolution in Three-Dimensionally Printed Mn-Prussian Blue Analogue-Based Electrodes for Energy Storage","authors":"Pedro H. S. Borges,&nbsp;Michele V. C. O. da Silva,&nbsp;Jéssica S. Stefano,&nbsp;Rafael R. Barreto,&nbsp;Abner de Siervo,&nbsp;Eduardo M. Richter,&nbsp;Rodrigo A. A. Muñoz,&nbsp;Juliano A. Bonacin,&nbsp;Edson Nossol","doi":"10.1021/acsnanoscienceau.5c00167","DOIUrl":"10.1021/acsnanoscienceau.5c00167","url":null,"abstract":"<p>Three-dimensional(3D) printing offers a versatile routeto fabricatemultifunctional electrodes by integrating key components within asingle structure. Herein, we developed polylactic acid/carbon black/reducedgraphene oxide/manganese hexacyanoferrate (PLA/CB/rGO/MnHCF) electrodesand evaluated their structural and electrochemical behavior to understandthe cooperative dynamics governing their performance. Scanning electronmicroscopy and energy-dispersive X-ray spectroscopy analyses confirmedthe homogeneous dispersion of MnHCF microcubes and carbonaceous additiveswithin the PLA matrix. PLA/CB/rGO electrodes exhibited predominantlycapacitive behavior, whereas MnHCF incorporation introduced distinctredox features associated with Fe^2+/3+ and Mn^2+/3+ transitions. Galvanostatic cycling revealed enhanced capacitanceand high reversibility, with long-term testing over 3,500 cycles showinga remarkable increase in capacitance. Postcycling characterizationindicated expansion of the electroactive surface area, activationof previously inaccessible MnHCF sites, and reduction of rGO/CB functionalgroups. Raman and FTIR analyses confirmed persistence of Mn³⁺ and Fe³⁺ centers after cycling. These findings supporta cooperative mechanism in which the insulating PLA matrix imposeslocalized electron bottlenecks, redirecting the charge toward rGO/CBsites for reduction while sustaining MnHCF oxidation. This synergisticredistribution progressively enhances redox activity and conductivity,turning the PLA host′s insulating nature into a driver of long-termactivation. Overall, the 3D-printed PLA/CB/rGO/MnHCF electrodes demonstratestability, progressive activation, and promise for scalable and tunableenergy storage applications.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 3","pages":"409–419"},"PeriodicalIF":7.5,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148296512","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}

{"title":"Activation of the Complement System: Morphological Differences in the Surface of PIBCA Nanoparticles Coated with Polysaccharides","authors":"Iago Dillion Lima Cavalcanti,&nbsp;Vinícius Alexandre Fiaia Costa,&nbsp;Danilo Rosa Seixas,&nbsp;Bruno Junior Neves,&nbsp;Francisco Humberto Xavier-Junior,&nbsp;Mariane Cajubá de Britto Lira Nogueira,&nbsp;Nereide Stela Santos Magalhães,&nbsp;Eloisa Berbel Manaia,&nbsp;Gilles Ponchel","doi":"10.1021/acsnanoscienceau.5c00196","DOIUrl":"10.1021/acsnanoscienceau.5c00196","url":null,"abstract":"<p>Drug-loaded nanosystems are often associated with theadvantagesof controlled drug release and reduced toxicity. Understanding theactivation of the complement system by polysaccharide-coated nanosystemsbecomes a crucial step in the development of new nanomedicines sincethe nonactivation of the complement system allows the nanosystemsto circulate blood for longer. The aim of this study was to evaluatethe activation of the complement system via the C3 protein pathwayby polyisobutylcyanoacrylate (PIBCA) nanoparticles coated with polysaccharides(fucoidan, chitosan, or levan) with different surface morphologies.To this end, the nanoparticles were developed using anionic emulsionpolymerization (AEP) and redox emulsion polymerization (RREP) techniqueswere applied to obtain nanoparticles with the same chemical compositionbut different polysaccharide architectures. The complement systemactivation studies were carried out using the 2D immunoelectrophoresistechnique. Polysaccharide-coated nanoparticles were obtained withsizes ranging from 99.0 ± 0.5 to 659.9 ± 39.0 nm. As expected,the surface charge of the nanoparticles varied as a function of thepolysaccharide coating: positive charges for chitosan-NPs, negativecharges for fucoidan-NPs, and neutral charges for levan-NPs. Accordingto the results, Chi-NPs did not activate the complement system, whileFuc-NPs and Lev-NPs did, depending on the surface morphology of thepolysaccharides. The nanoparticles (Fuc-NPs and Lev-NPs) obtainedby the AEP technique were strong complement activators, and thoseobtained by the RREP technique seemed to induce the formation of aggregateswith the C3b protein. The molecular docking results reinforce thesefindings, highlighting the regions of the polysaccharide interactionwith the C3 and C3b proteins. The presence of some chemical groups,such as the sulfate groups present in fucoidan, on the surface ofthe nanoparticles may contribute to the activation of the complementsystem.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 3","pages":"457–468"},"PeriodicalIF":7.5,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148296408","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}

{"title":"Structural Stability of Sulfur-Depleted MoS2","authors":"Ygor M. Jaques,&nbsp;Cristiano F. Woellner,&nbsp;Lucas M. Sassi,&nbsp;Marcelo L. Pereira Junior,&nbsp;Luiz A. Ribeiro Junior,&nbsp;Pulickel M. Ajayan,&nbsp;Douglas S. Galvão","doi":"10.1021/acsnanoscienceau.5c00172","DOIUrl":"10.1021/acsnanoscienceau.5c00172","url":null,"abstract":"<p>Transition metal dichalcogenides (TMDs), particularlymonolayerMoS₂, have received increased attention in materials scienceand have been exploited in diverse applications, from photonics tocatalysis. Defects in TMDs play a crucial role in modulating theirproperties, and understanding defect-induced dynamics is of greatimportance. This study investigates the dynamics of sulfur depletionin defective monolayer MoS₂, which yields stable MoS monolayers.Various defect sizes, temperature regimes (300–1000 K), andsubstrate effects were investigated. Through comprehensive classicalmolecular dynamics (CMD) and <em>ab initio</em> moleculardynamics (AIMD) simulations, we elucidate the dynamics of sulfur vacancyformation in MoS₂ lattices. After removal of all sulfuratoms from the top layer, several sulfur atoms from the bottom layerspontaneously migrate to the top layer as a response to increase structuralstability, thus creating a MoS_<em>x</em> alloy.These findings deepen our understanding of defect dynamics in TMDs,offering valuable insights into the controlled engineering of theirproperties for nanotechnology applications.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 3","pages":"420–428"},"PeriodicalIF":7.5,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148296473","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}

{"title":"Conditional Reactivation of Lysozyme Nanosystems via Hydrophobic Ion Pairing","authors":"Agnieszka Topczewska,&nbsp;Sönke Friedrichsen,&nbsp;Wolfgang Streit,&nbsp;Wolfgang J. Parak,&nbsp;Nils Rutschke,&nbsp;Stephan Kolkenbrock,&nbsp;Andreas Riedinger","doi":"10.1021/acsnanoscienceau.5c00160","DOIUrl":"10.1021/acsnanoscienceau.5c00160","url":null,"abstract":"<p>Enzyme-catalyzed reactions rely on the precise regulationof enzymaticactivity to achieve high efficiency and specificity. Adjustment ofconditions during the reaction is only one possibility, whereas timelyactivation and termination of enzymatic functions further tailor theoutcomes. Existing methods for enzyme activation include temperature,pH, ultrasound, and magnetic and electric fields, but each approachstruggles with limited applicability to different enzyme classes andfaces challenges with reversibility. In our research, we employedhydrophobic ion pairing to modulate lysozyme activity through complexationwith hydrophobic counterions, sodium docusate, and sodium laurate.The resulting complex agglomerates were stabilized with nonionic surfactantsand characterized by their colloidal properties, including size andzeta potential. A fluorescence-based enzymatic assay was used to monitorthe activity of the nanosystems under varying dissociation conditions.Lysozyme nanosystems with sodium docusate were completely inactivated,while those with sodium laurate retained only a partial activity.Increasing the ionic strength reversed the inactivation and restoredenzymatic function. We developed a method for reversible, conditionalmodulation of enzymatic activity as a function of the ionic concentration.This work demonstrates a tunable strategy for regulating enzyme activityin cases where conventional control mechanisms are not suitable.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 3","pages":"400–408"},"PeriodicalIF":7.5,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148296481","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}

{"title":"Surface-Engineered Ru–Graphene Mesosponge Catalysts for pH-Universal and Seawater Hydrogen Evolution","authors":"Nichakarn Sornnoei,&nbsp;Naruewan Samantarkun,&nbsp;Thanit Saisopa,&nbsp;Panwad Chavalekvirat,&nbsp;Pawin Iamprasertkun,&nbsp;Bin Wang,&nbsp;Tawan Sooknoi,&nbsp;Shinichiroh Iwamura,&nbsp;Hirotomo Nishihara,&nbsp;Wisit Hirunpinyopas","doi":"10.1021/acsnanoscienceau.6c00016","DOIUrl":"10.1021/acsnanoscienceau.6c00016","url":null,"abstract":"<p>Efficient green hydrogen production from diverse watersourcesdemands excellent catalysts that combine high activity, durability,and pH universality. Herein, we present a surface-engineered graphenemesosponge (GMS) uniformly decorated with ruthenium (Ru) nanoclustersas a robust electrocatalyst for the hydrogen evolution reaction (HER).The hierarchical GMS structure offers exceptional conductivity andmesoporosity, enabling nanoscale Ru dispersion and strong interfacialcoupling. The obtained synergy of Ru50/GMS (optimized Ru deposition)delivers outstanding HER performance across pH range conditions, whichprovides overpotentials of ∼0.13 V and ∼0.061 V in acidicand alkaline electrolytes, respectively, close to those of the Ptelectrode. Interestingly, Ru50/GMS achieves 10 mA cm^–2 at only ∼0.39 V in neutral seawater, demonstrating robustoperation under harsh, chloride-rich conditions. This performanceis nearly 3-fold higher than that of pristine GMS, while sustainingaccelerated kinetics and enhanced charge buffering. This is due toelectronic modulation at the Ru–graphene interface via topologicaldefects, which substantially optimized hydrogen adsorption and desorption,underpinning rapid reaction pathways. Furthermore, long-term operationsconfirm structural integrity and negligible catalyst degradation after5000 cycles and 24 h at ultrahigh current density (−208 ±10 mA cm^–2), highlighting catalyst resilience forpractical conditions. Therefore, this work demonstrates a scalablestrategy for designing Ru-based catalysts on porous graphene supports,offering a compelling route for efficient, seawater-compatible greenhydrogen production.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 3","pages":"491–504"},"PeriodicalIF":7.5,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148296525","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}

{"title":"Iron Oxide Nanoparticles Integrated in 3D-Printed Dosage Forms for Advanced Iron Supplementation","authors":"Mac-Kedson Medeiros Salviano Santos,&nbsp;Alexandre Silva Santos,&nbsp;Ariane Pandolfo Silveira,&nbsp;Diego Sousa-Moura,&nbsp;Idejan Padilha Gross,&nbsp;Ingrid Gracielle Martins da Silva,&nbsp;Luis Alexandre Muehlmann,&nbsp;Cesar Koppe Grisolia,&nbsp;Sebastião William Da Silva,&nbsp;Sônia Nair Báo,&nbsp;Marcilio Cunha-Filho,&nbsp;Marcelo Henrique Sousa","doi":"10.1021/acsnanoscienceau.5c00159","DOIUrl":"10.1021/acsnanoscienceau.5c00159","url":null,"abstract":"<p>Iron deficiency remains a major global health burden,and conventionaloral supplements based on Fe salts are often limited by poor bioavailabilityand gastrointestinal intolerance. Here, we report an innovative strategythat integrates iron oxide nanoparticles (Fe₃O₄ NPs) into three-dimensional (3D) printed tablets (printlets) asadvanced oral dosage forms for iron supplementation. Bare and citrate-coatedFe₃O₄ NPs were synthesized, dispersed in glycerol,and incorporated into poly(vinyl alcohol) filaments via hot-melt extrusion,which enabled fabrication of uniform cylindrical tablets through fuseddeposition modeling (FDM). Structural and spectroscopic analyses confirmedsuccessful incorporation and homogeneous distribution of NPs withinthe polymeric matrix, while mechanical testing demonstrated that stableglycerol-based dispersions yielded filaments with superior strengthand printability compared to powder-based mixtures. Dissolution studiesunder simulated gastric and intestinal conditions revealed rapid andcomplete iron release for both formulations at pH 1.0, whereas citrate-functionalizedNPs significantly enhanced iron release at pH 6.8, correlating withimproved colloidal stabilization of the supernanostructures generatedduring dissolution. Zebrafish embryo assays further indicated lowacute toxicity for both nanoparticle suspensions and dissolved printlets,with citrate coating mitigating hatching delays observed at higherconcentrations. Altogether, these results demonstrate that combiningiron oxide nanoparticles with FDM-based additive manufacturing enablesthe production of pharmaceutically relevant and customizable oraldosage forms with improved dissolution behavior and exhibiting lowacute toxicity. This platform offers a proof-of-concept toward personalizediron supplementation therapies that address the limitations of conventionalformulations.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 3","pages":"386–399"},"PeriodicalIF":7.5,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148296537","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}

{"title":"In Situ Mineralization of Gold Nanoparticles from Sodium Aurothiomalate or Tetrachloroauric Acid in Human Cells","authors":"Muriel F. Gusta,&nbsp;Sofia Rubio,&nbsp;Macarena Cobaleda-Siles,&nbsp;Silvia Pujals,&nbsp;Maria de la Mata,&nbsp;Jordi Arbiol,&nbsp;Neus G. Bastus,&nbsp;Victor Puntes","doi":"10.1021/acsnanoscienceau.5c00199","DOIUrl":"10.1021/acsnanoscienceau.5c00199","url":null,"abstract":"<p>Biological systems can convert ionic gold precursorsinto nanoparticles(NPs) via redox-driven mineralization, yet the pathways and outcomesremain poorly understood. To address this, we investigated gold nanoparticle(Au NP) spontaneous formation from tetrachloroauric acid (HAuCl₄) and sodium aurothiomalate (NaAuS) in mammalian cells anda complete cell culture medium. HAuCl₄ underwent rapidmultielectron reduction, producing abundant small intracellular NPsthat, at higher concentrations, coalesced into compact clusters andcompromised cell viability. In contrast, NaAuS followed slower one-electronreduction, was tolerated at higher concentrations, and yielded fewerbut larger assemblies, including fibrous superstructures composedof crystalline Au domains. Extracellular mineralization generatedmorphologies distinct from those observed intracellularly, indicatingthat intracellular NPs result from cytoplasmic reduction rather thanthe uptake of extracellular products. Perturbations of the redox balancesuppressed intracellular nucleation and promoted Au reduction in theextracellular milieu. Analysis of the NP size distributions providedmechanistic fingerprints: HAuCl₄ produced narrow Gaussian-likeprofiles under synchronized nucleation, whereas NaAuS consistentlygenerated broader log-normal distributions reflecting asynchronousgrowth. These findings demonstrate that the precursor and cellularredox state can be adjusted to control NP localization and morphology.Overall, this work links precursor chemistry and redox biology toNP architecture and highlights opportunities for biologically guidednanoparticle synthesis in imaging and therapeutic applications.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 3","pages":"469–481"},"PeriodicalIF":7.5,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148296428","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}

{"title":"Transport Evidence of Surface States in Magnetic Topological Insulator MnBi2Te4","authors":"Michael Wissmann,&nbsp;Romain Giraud,&nbsp;Börge Mehlhorn,&nbsp;Maxime Leroux,&nbsp;Mathieu Pierre,&nbsp;Michel Goiran,&nbsp;Walter Escoffier,&nbsp;Bernd Büchner,&nbsp;Anna Isaeva,&nbsp;Joseph Dufouleur,&nbsp;Louis Veyrat","doi":"10.1021/acsnanoscienceau.5c00185","DOIUrl":"10.1021/acsnanoscienceau.5c00185","url":null,"abstract":"<p>Magnetic topological insulators can host chiral 1D edgechannelsat zero magnetic field, when a magnetic gap opens at the Dirac pointin the band structure of 2D topological surface states, leading tothe quantum anomalous Hall effect in ultrathin nanostructures. Forthicker nanostructures, quantization is severely reduced by the coexistenceof edge states with other quasi-particles, usually considered as bulkstates. Yet, surface states also exist above the magnetic gap, butit remains difficult to identify electronic subbands by electricalmeasurements due to strong disorder. Here we unveil surface statesin MnBi₂Te₄ nanostructures, using magneto-transportin very-high magnetic fields up to 55 T, giving evidence of Shubnikov-de-Haasoscillations above 40 T. A detailed analysis confirms the 2D natureof these quantum oscillations, thus establishing an alternative methodto photoemission spectroscopy for the study of topological surfacestates in magnetic topological insulators using Landau level spectroscopy.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 3","pages":"357–362"},"PeriodicalIF":7.5,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148296568","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}