ACS Nanoscience Au最新文献

{"title":"Plasmonic Hybridization and Near-Field Localization in Gold “Dog Bone” Nanoparticles","authors":"Ibrahim Tanriover,&nbsp;Koustav Kundu,&nbsp;Amit Jaiswal,&nbsp;Haihua Liu","doi":"10.1021/acsnanoscienceau.6c00058","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.6c00058","url":null,"abstract":"<p>Gold nanoparticles with complex anisotropic geometriesoffer uniqueopportunities for tailoring plasmonic near-fields beyond the limitsof conventional nanorods. Here we combine photon-induced near-fieldelectron microscopy (PINEM) and full-wave simulations to resolve plasmonhybridization and near-field localization in gold dog-bone nanoparticlesand their dimers with and without conformal SiO₂ shells.We demonstrate that the dog-bone geometry drives unconventional polarization-dependentfield confinement, including pronounced tip-localized near-fieldsunder both longitudinal and transverse excitation. Conformal SiO₂ shells red-shift the plasmon resonances through dielectricscreening and prevent charge-transfer coupling in adjacent dimers.Depending on the dimer orientation and excitation polarization, coupledstructures exhibit distinct bonding- and antibonding-like hybridizedmodes as well as interparticle near-field channels. However, weaklyinteracting dimers retain largely independent particle responses withgeometry-governed asymmetries. The close agreement between PINEM measurementsand simulations establishes a direct picture of how shape, dielectricenvironment, and nanoscale coupling together define plasmonic modesin complex anisotropic nanoparticles. These findings provide designprinciples for engineering localized optical fields in plasmonic nanoscalestructures.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 4","pages":"549–557"},"PeriodicalIF":7.5,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148769686","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":"Semiconducting Nanotubes Derived from a Rectangular Graphyne: A DFT Study","authors":"Wjefferson Henrique da Silva Brandão,&nbsp;Anderson Gomes Vieira,&nbsp;Jonathan da Rocha Martins,&nbsp;Andrea Latgé,&nbsp;Marcelo Lopes Pereira, Junior,&nbsp;Eduardo Costa Girão","doi":"10.1021/acsnanoscienceau.5c00157","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.5c00157","url":null,"abstract":"<p>Proposing new waysto organize carbon in 2D nanomaterials has beena relevant strategy in the search for systems with targeted propertiesfor different applications. One focus is the study of fully sp² nongraphitic networks, with successfully synthesized examples.Hybrid sp–sp² systems of the graphyne family area related approach, and many systems have the honeycomb lattice asa base model. However, other examples have been inspired by otherlattices as the recently proposed rγGY sheet, which featuresa semiconducting behavior with highly localized <em>quasi</em>-1D states. Here, we investigate how to tune rγGY propertiesby folding this sheet into nanotube forms. We elucidate mechanismsthat determine their electronic structure by means of density functionaltheory calculations, as well as we identify the interplay involvingchirality, diameter, and the emergence of dispersive/localized frontierstates on gap modulation through simple extrapolated methods.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 4","pages":"558–569"},"PeriodicalIF":7.5,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148769692","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":"Combating Antimicrobial Resistance with Hydrophilic and Eco-Friendly Membrane-Active Antibiotics Derived from Biological Nanoparticles","authors":"Wan Zheng,&nbsp;Hairong Ma,&nbsp;John R. Dutcher,&nbsp;Hongjun Liang","doi":"10.1021/acsnanoscienceau.6c00025","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.6c00025","url":null,"abstract":"<p>The ever-increasinguse of antibiotics and the accumulationofantibiotic waste in ecosystems are expediting antimicrobial resistance(AMR). Our next-generation antibiotics should aim for a differentantimicrobial mechanism that is less conducive to AMR, a wider therapeuticwindow tolerant to drug titration, and a quicker deactivation strategyresponsive to environmental stimuli. Membrane-active antimicrobials(MAAs) have the potential to thwart AMR, but the lipophilicity ofcurrent MAAs gives rise to their broad-spectrum cytotoxicity. Here,we show that biological nanoparticles, such as cyclodextrin and phytoglycogen,can be transformed into potent MAAs with low cytotoxicity by graftingthem with hydrophilic polymer brushes. In service, these hydrophilicnanoantibiotics kill bacteria by inducing pore formation exclusivelyon microbial membranes rich in negative curvature lipids, a bactericidalmode less likely to incur AMR. After service, they are degraded anddeactivated by biomass recycling enzymes that are abundant in ecosystems.This study illuminates a new paradigm to combat AMR with hydrophilicand eco-friendly membrane-active antibiotics derived from biologicalnanoparticles.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 4","pages":"606–621"},"PeriodicalIF":7.5,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148769833","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":"Atomic-Scale Characterization of Impurity Enrichment to High-Purity Alumina Lattice Defects","authors":"Tommaso Tacchetto,&nbsp;Allan Costine,&nbsp;Mark Pearce,&nbsp;Zakaria Quadir,&nbsp;Steven M. Reddy,&nbsp;David Saxey,&nbsp;Denis Fougerouse,&nbsp;Xiao Sun,&nbsp;Dimitrios Dimitriou,&nbsp;Martijn Woltering","doi":"10.1021/acsnanoscienceau.5c00193","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.5c00193","url":null,"abstract":"<p>High-purity alumina(HPA) is a cornerstone material in advancedenergy and electronic technologies necessary for the global energytransition. Traditionally, HPA is routinely studied using bulk analyticaltechniques, which overlook nanoscale inhomogeneities. However, asindustrial demand shifts toward increasingly higher purity standards,a fundamental understanding of the structural and chemical nanoscalecharacteristics of HPA becomes essential. In this study, electronmicroscopy and atom probe tomography are used to reveal that crystallographicdefect structures within HPA act as major sinks for bulk impurities.These impurities are preferentially accumulated via dislocation-mediateddiffusion. These findings challenge the conventional homogeneous viewof pure bulk materials and show that HPA can be chemically and structurallyinhomogeneous at the nanoscale level. The results highlight the criticalrole of nanoscale characterization of high-end materials and revealnew opportunities to develop innovative pathways for precision designand manufacturing of next-generation high-performance materials.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 4","pages":"530–536"},"PeriodicalIF":7.5,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148769450","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":"Mapping Emission Directionality of Color Centers in Silicon Carbide Microparticles","authors":"Erlend Lemva Ousdal,&nbsp;Marianne Etzelmüller Bathen,&nbsp;Anna Stray Rongve,&nbsp;Benedicte Allum Pedersen,&nbsp;Gard Momrak Selnesaunet,&nbsp;Snorre Braathen Kjeldby,&nbsp;Anne Marie Moen,&nbsp;Andrej Kuznetsov,&nbsp;Lasse Vines","doi":"10.1021/acsnanoscienceau.5c00187","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.5c00187","url":null,"abstract":"<p>Color centers in semiconductors constitute a promisingplatformfor developing quantum technology applications. To fully mature theplatform, strict requirements on controlling the directionality ofphoton emission must be met. This work presents a method for studyingand evaluating geometric features that can impact the directionalityof emission from color centers in semiconductors by leveraging differentnanostructures in silicon carbide (SiC) microparticles. Using spectrallyresolved and angle-resolved cathodoluminescence measurements, we demonstratedecoupling of the color center emission from other luminescence sourcesand investigate how geometric features affect emission directionality.Combined with finite difference time domain simulations, geometriceffects on emission directionality in the SiC particles are exploredusing simulations of luminescence from idealized geometries. As such,we present a holistic approach to evaluate the directionality of emissionfrom color centers, independent of the material system, by combiningexperimental measurements and numerical simulations, using SiC asa benchmark case.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 4","pages":"523–529"},"PeriodicalIF":7.5,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148769452","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":"Shape Evolution of MgO Nanocubes via Rapid pH Self-Adjustment at Oxide–Water Interfaces","authors":"Romane Cavrot,&nbsp;Aminata Diouf,&nbsp;Cedric Baumier,&nbsp;Jacek Goniakowski,&nbsp;Livia Giordano,&nbsp;Slavica Stankic","doi":"10.1021/acsnanoscienceau.6c00030","DOIUrl":"https://doi.org/10.1021/acsnanoscienceau.6c00030","url":null,"abstract":"<p>Magnesium oxide (MgO) is a prototypical model for oxide–waterinterfaces and a technologically relevant material in catalysis, environmentalremediation, and corrosion-resistant coatings. Here, the dissolutionbehavior and morphology evolution of MgO smoke nanocubes are investigatedin aqueous media while simultaneously monitoring the self-adjustingsolution pH under three initial conditions: distilled water (pH ≈6.4), mildly acidic HCl solution (pH = 6), and alkaline NaOH solution(pH = 11). Time-resolved TEM reveals that dissolution initiates preferentiallyat (110) edges, drives a progressive transition from cubic to truncatedcubes and finally octahedral morphologies exposing (111) facets, andis accompanied by brucite [Mg(OH)₂] formation whose extentdepends on particle size and pH. Upon immersion in distilled wateror a mildly acidic solution, the suspension pH rapidly rises to ≈11–12within minutes, whereas this abrupt pH change is not observed whenMgO is introduced directly into an already alkaline medium (pH 11).A subsequent quasi-stationary regime with pH maintained at 11–12persists for days, showing that the vast majority of the observedmorphological transformations in these systems actually proceed understrongly alkaline rather than nominally neutral or mildly acidic conditions.To rationalize these observations, density functional theory calculationsare performed for ideal and defect-containing low-index MgO surfacesunder H⁺-rich conditions, including protonated Mg-vacancy(V_MgH₂) defects relevant to nonoxidative dissolution.The calculations reveal a strong pH dependence of defective surfaceenergies, pronounced anisotropy in the thermodynamic driving forcefor dissolution, and higher Mg²⁺ extraction barriers forcompact (100) than for more open (110) and (111) terminations, consistentwith the experimentally observed facet-dependent kinetics. These resultspresent a unified, pH-dependent picture of MgO dissolution and morphologyevolution in water, clarify that earlier “neutral” dissolutionstudies actually probed alkaline conditions, and offer guidelinesfor controlling MgO stability and Mg(OH)₂ formation inaqueous media. They highlight how self-adjusted local pH and defectchemistry regulate dissolution, shape transformation, and passivationof oxide nanomaterials at solid–liquid interfaces relevantto environmental and energy-related (electro)chemical systems.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 4","pages":"622–632"},"PeriodicalIF":7.5,"publicationDate":"2026-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148769839","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 Complexity from Consecutive Postsynthetic Transformations: The Site-Specificity of Sequential Tellurium Anion and Cadmium Cation Exchange on Roxbyite Copper Sulfide Nanoparticles","authors":"Cat Tuong Nguyen Dinh,&nbsp;Clarisse Doligon,&nbsp;Noah Ehrenberg,&nbsp;Eli Rudman,&nbsp;Holden Brown,&nbsp;Alaina Konicki,&nbsp;Chul-Hyun Jeong,&nbsp;Qi Luo,&nbsp;Raymond E. Schaak,&nbsp;Katherine E. Plass","doi":"10.1021/acsnanoscienceau.5c00188","DOIUrl":"10.1021/acsnanoscienceau.5c00188","url":null,"abstract":"<p>A crucial tool in the design of multicomponent nanoheterostructuresis the ability to carry out reactions with site-specificity. Here,we examine the interplay of two site-specific postsynthetic transformations─telluriumanion exchange followed by cadmium cation exchange on Cu_2-xS nanorods─to reveal how, together, they create numerous newnanoheterostructures with various interfaces and chemical components.By varying the temperature of the initial exchange, we obtained Cu_2-xS/Cu_2-xTe structures with varyingnumbers of Cu_2-x Scores and thicknesses of Cu_2-xTe shells. We then subjected these Cu_2-xS/Cu_2-xTe nanoheterostructures to either low- orhigh-temperature cadmium exchange. While many different factors dictatingthe position of cation exchange have been identified, here we findthat differences in the ease of ion diffusion through Cu_2-xS and Cu_2-xTe direct the incoming Cd²⁺ toward reaction with Cu_2-xS. This straightforwardsite preference for cation exchange, coupled with the ability to modulatethe extent of tellurium and cadmium exchange, is used to create severaldistinctive nanostructure patterns. In particular, we demonstratethat the regioselectivity of Te^2– anion exchangeon Cu_2-xS nanorods can be leveraged to produce distincttemplates for cation exchange, resulting in a library of nontrivialnanoheterostructures. The demonstration of such a variety of differentcopper/cadmium chalcogenide structures shows that consecutive anionand cation exchanges offer new routes to novel materials.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 3","pages":"444–456"},"PeriodicalIF":7.5,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148296517","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":"Eco-Friendly Engineered Ternary Nanocomposite for Label-Free Fluorescent SARS-CoV-2 N-Gene DNA Detection","authors":"Manikandan Dhayalan,&nbsp;Mallu Chenna Reddy,&nbsp;Madan Kumar Arumugam,&nbsp;Desy Liana,&nbsp;Billy Wai-Lung Ng,&nbsp;Anuchit Phanumartwiwath","doi":"10.1021/acsnanoscienceau.5c00179","DOIUrl":"10.1021/acsnanoscienceau.5c00179","url":null,"abstract":"<p>The COVID-19 pandemicbrought to light the demand for nucleic-acidsensing platforms that are rapid, resilient, and scalable for integrationat the point-of-care. In this study, we described a green-engineeredfluorescence biosensing platform using a Ag–TiO₂–CeO₂ ternary nanocomposite fabricated with <em>Morinda citrifolia</em> leaf extract. The biosynthetic approachfacilitated the production of a nanocomposite that is biocompatible,exhibits high surface area, and contains oxygen vacancy related tosurface sites that promote favorable interactions with nucleic acids.The nanocomposite was functionalized with thiol-terminated antisenseprobes targeting the SARS-CoV-2 N-gene and employed in enzyme-freehybridization assays, using synthetic DNA as a model target and humangenomic DNA as a model for nonspecific hybridization. The platformshowed a significant shift in fluorescence after 30 min of hybridizationand was capable of detecting target unlabeled DNA at a concentrationof 3 pM. The interaction of the nanocomposite with short DNA oligonucleotidesand long double-stranded genomic DNA showed the potential of the surfacechemistry of the nanocomposite for nucleic acid sensing. This studyprovides a nanocomposite fluorescence biosensing platform at the materialproof level and paves the way for future extensions and viral diagnosticsin complex biological mixtures.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 3","pages":"429–443"},"PeriodicalIF":7.5,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148296529","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":"Accurate Prediction of Optical Transitions in Epitaxial InGaAs/InAlAs Asymmetric Coupled Quantum-Well Structures","authors":"Konstantinos Pantzas,&nbsp;Virginie Trinité,&nbsp;Angela Vasanelli,&nbsp;Carlo Sirtori,&nbsp;Grégoire Beaudoin,&nbsp;Isabelle Sagnes,&nbsp;Jean-Luc Reverchon,&nbsp;Gilles Patriarche","doi":"10.1021/acsnanoscienceau.5c00156","DOIUrl":"10.1021/acsnanoscienceau.5c00156","url":null,"abstract":"<p>Atomically resolved Z-contrast and strain mappings areused toextract a model of the composition of an InGaAs/InAlAs asymmetriccoupled quantum-well structure grown on InP by using metal–organicvapor phase epitaxy. The model accounts for grading across multiplealloy interfaces and is used to compute intersubband absorption inthe structure. The simulation accurately predicts the experimentalabsorption spectrum of the structure within only a few meV, an almost10-fold improvement over simulations using a square-band profile withnominal alloy compositions. This work thus provides a significantstep forward in accurate and predictive simulations of the opticalproperties of epitaxial heterostructures for emission, modulation,and detection in mid-infrared.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 3","pages":"379–385"},"PeriodicalIF":7.5,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148296420","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":"Magnetically Driven Elastic Microswimmers: Exploiting Hysteretic Collapse for Autonomous Propulsion and Independent Control","authors":"Theo Lequy,&nbsp;Andreas M. Menzel","doi":"10.1021/acsnanoscienceau.6c00014","DOIUrl":"10.1021/acsnanoscienceau.6c00014","url":null,"abstract":"<p>When swimming at low Reynolds numbers, inertial effectsare negligibleand reciprocal movements cannot induce net motion. Instead, symmetrybreaking is necessary to achieve net propulsion. Directed swimmingcan be supported by magnetic fields, which simultaneously providea versatile means of remote actuation. Thus, we analyze the motionof a straight microswimmer composed of three magnetizable beads connectedby two elastic links. The swimming mechanism is based on orientedexternal magnetic fields that oscillate in magnitude. Through inducedreversible hysteretic collapse of the two segments of the swimmer,the two pairs of beads jump into contact and separate nonreciprocally.Due to higher-order hydrodynamic interactions, net displacement resultsafter each cycle. Different microswimmers can be tuned to differentdriving amplitudes and frequencies, allowing for simultaneous independentcontrol by just one external magnetic field. The swimmer geometryand magnetic field shape are optimized for maximum swimming speedusing an evolutionary optimization strategy. Thanks to the simpleworking principle, an experimental realization of such a microrobotseems feasible and may open new approaches for microinvasive medicalinterventions such as targeted drug delivery.</p>","PeriodicalId":29799,"journal":{"name":"ACS Nanoscience Au","volume":"6 3","pages":"482–490"},"PeriodicalIF":7.5,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148296542","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}