ACS Materials Au最新文献

{"title":"Biocompatible Self-Healing Hydrogel for VAT 3D Printing","authors":"Maria D’Aloia,&nbsp;Désirée Baruffaldi,&nbsp;Sandra Dirè,&nbsp;Emanuela Callone,&nbsp;Angelo Angelini,&nbsp;Candido Fabrizio Pirri,&nbsp;Ignazio Roppolo,&nbsp;Francesca Frascella","doi":"10.1021/acsmaterialsau.5c00194","DOIUrl":"10.1021/acsmaterialsau.5c00194","url":null,"abstract":"<p>Self-healing hydrogels (SHHs) are promising materialsin tissueengineering due to their ability to mimic the biomechanical propertiesof biological tissues and autonomously repair damage and can serveas ideal three-dimensional scaffolds for cell proliferation and differentiation.However, conventional processing methods, such as extrusion-basedprinting, often limit the complexity and resolution of the fabricatedstructures. VAT photopolymerization, particularly digital light processing(DLP), on the other hand, offers advantages in terms of resolution,printing speed, and design freedom, making it an attractive approachfor developing SHHs. This study aims to develop a biocompatible andself-healing hydrogel through DLP, enhancing the structural complexitywhile maintaining self-repairing properties. The hydrogel is madefrom polyethylene glycol diacrylate (PEGDA), hydroxyethyl methacrylate(HEMA), dithiothreitol (DTT), and borax, and the solvent is PBS. Cross-linkingoccurs by radical photopolymerization, in which PEGDA and HEMA serveas cross-linkable monomers, while DTT and borax form borate–esterbonds, imparting self-repairing properties. Complex 3D structureswere fabricated by using a commercial DLP printer, and self-healingproperties were assessed. Chemical (FTIR, NMR), rheological, and mechanicalanalyses were performed along with cytocompatibility tests. The hydrogelexhibited successful 3D printability, allowing the fabrication ofcomplex structures. Self-healing tests demonstrated that, after 72h, the samples could self-repair and withstand tensile forces, maintainingtheir integrity after multiple damage–repair cycles. Chemicaland mechanical characterization confirmed the stability and viscoelasticbehavior of the material, while preliminary cytocompatibility assaysindicated the suitability for tissue engineering applications. DLP-basedprinting enables the fabrication of self-healing hydrogels with improvedresolution and design freedom. The developed hydrogel exhibits promisingmechanical properties and biocompatibility, making it a strong candidatefor tissue engineering applications.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"6 3","pages":"539–552"},"PeriodicalIF":9.1,"publicationDate":"2026-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147964775","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":"Dual-Ion Based Magneto-ionic Effects in Nanoporous Pd75Co25 Alloy","authors":"Stefan Eber,&nbsp;Georg Haberfehlner,&nbsp;Peter Banzer,&nbsp;Roland Würschum,&nbsp;Stefan Topolovec","doi":"10.1021/acsmaterialsau.5c00245","DOIUrl":"10.1021/acsmaterialsau.5c00245","url":null,"abstract":"<p>Magneto-ionics isan energy-efficient approach to control the magneticproperties of a material by the application of a voltage. For instance,a voltage-induced switching between a ferromagnetic ON state and amagnetic OFF state can be achieved in Co by the reversible reduction/formationof Co (hydr-)oxides. In this work, we demonstrate that, in additionto this magneto-ionic effect based on oxygen species, a magneto-ioniceffect based on hydrogen can be obtained by changing from pure Coto a Pd–Co alloy. To this end, we prepared a nanoporous Pd₇₅Co₂₅ alloy with a porous structure in the 10 nmrange by dealloying of Al₈₀(Pd₇₅Co₂₅)₂₀. Initially, the nanoporous alloy is mostly oxidizedand thus generates only a very weak magnetic signal, correspondingto an OFF state. Inducing the reduction of the Co (hydr-)oxides byapplying a voltage results in a transition to a ferromagnetic ON state.Due to the macroscopic sample size, the ON state exhibits a considerableabsolute magnetic moment in the order of 0.01 emu. This moment canbe obtained within just a few minutes thanks to the nanoporous structure.A detailed electrochemical characterization reveals that the magnetizationof the alloy is also significantly influenced by the absorption ofhydrogen into the nanoporous material, which becomes apparent throughan additional increase in the magnetization during the hydrogen desorption.This second magneto-ionic effect is faster and occurs within the timeframe of seconds. Overall, the occurrence of these two magneto-ioniceffects, which are based on different kinds of ionic species, opensup the possibility to adapt the magneto-ionic response by adjustingthe composition of the Pd–Co alloy.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"6 3","pages":"583–595"},"PeriodicalIF":9.1,"publicationDate":"2026-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147964757","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":"Dark Polymerization Following Partial Radical Photocuring: Effect of Light Intensity and Exposure Duration","authors":"Soroosh Farsiani,&nbsp;Frank D. Blum,&nbsp;Hadi Noori","doi":"10.1021/acsmaterialsau.5c00225","DOIUrl":"10.1021/acsmaterialsau.5c00225","url":null,"abstract":"<p>Free-radical photopolymerization enables the spatialand temporalcustomization of the viscoelastic properties of polymers for multifunctionaldesigns. Adjusting light intensity and exposure time can be used tocontrol the kinetics of photopolymerization and, therefore, the nonuniformityin the viscoelastic properties of the polymerized material. Additionally,polymerization that occurs in the dark after partial radical photopolymerizationmust be taken into account to accurately assess the state of polymerizationand maximize photopolymerization efficiency when complete curing isrequired. In this study, we present a systematic methodology for examiningthe combined effects of light intensity and exposure time on darkpolymerization following partial radical photopolymerization of twoacrylate-based photocuring adhesives applicable for bonding dissimilarmaterials. The findings indicate that light power intensity and materialcomposition are interconnected factors influencing polymerizationin the absence of light. Additionally, the results show that, foreach material, the stage of photopolymerization─whether inthe autoacceleration or autodeceleration phase─significantlyaffects both the extent and the kinetics of dark polymerization. Thesimilarity of trends in dark radical polymerization, regardless ofprocess and material conditions, led to the proposal of a two-parameterpower-law function to empirically describe the trend and rate of darkpolymerization.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"6 3","pages":"566–575"},"PeriodicalIF":9.1,"publicationDate":"2026-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147964828","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":"Optimizing Solid Lubricity in Complex Particle Flow","authors":"Dhanush U. Jamadgni,&nbsp;Lianett A. Pineda,&nbsp;Martin Thuo","doi":"10.1021/acsmaterialsau.5c00260","DOIUrl":"10.1021/acsmaterialsau.5c00260","url":null,"abstract":"<p>Granular matter flowis a complex many-body problem, especiallyfor complex particles. Particle flow has been enhanced using solidlubricants, more recently redefined as network disruptors (NDs), giventheir role in <em>in situ</em> disrupting of force chains.Herein, we evaluate attributes of a recently reported ND to establisha criterion that can be adopted to enhance the fluency. We evaluatethe effect of fiber shape, curl, lumen(s), mechanical strength, andsurface heterogeneity on rheological flow energy. Cylindrical fibersshowed enhanced fluency relative to flat fibers, while carbonization(pyrolysis) significantly enhanced fluency. Surprisingly, high tensilestrength and high curl index correlate with significant reductionin flow energy and hence enhanced fluency. Correlation between hightensile strength and fluency affirms that these materials are forcechain disruptors. Enhanced fluency with an increase in curl indexsuggests persistence of the additives in the granular matter matrixand hence continued force chain disruptions.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"6 3","pages":"596–603"},"PeriodicalIF":9.1,"publicationDate":"2026-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147964765","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":"Recycling Organic Semiconductors: Toward Sustainable Emerging Electronics","authors":"Haechan Park,&nbsp;Yerin Kim,&nbsp;Minji Kim,&nbsp;Jihyeon Jang,&nbsp;Jinyeong Park,&nbsp;Sehyun Kim,&nbsp;Myeonghyeon Na,&nbsp;Kyoseung Sim","doi":"10.1021/acsmaterialsau.5c00128","DOIUrl":"10.1021/acsmaterialsau.5c00128","url":null,"abstract":"<p>Organic semiconductors(OSCs) have emerged as essential buildingblocks for next-generation electronics due to their intrinsic mechanicalsoftness, solution processability, and compatibility with flexible,stretchable, and wearable platforms. However, despite their expandingapplications, the environmental and economic implications of OSCsthroughout their entire lifecycle, including energy- and solvent-intensivesynthesis as well as end-of-life disposal, remain insufficiently addressed.Indeed, the environmental footprint of OSCs is intensified not onlyby their chemically robust backbones, which resist natural degradationand complicate waste management, but also by synthesis processes thatgenerate large volumes of toxic solvent-based waste. In this Perspective,we first highlight the growing importance of OSC recycling, from bothenvironmental and economic standpoints, as it relates to current organicelectronics. We then review recent advances in OSC recycling, encompassingboth molecular-level strategies based on chemical depolymerization/repolymerizationand materials-level approaches involving selective extraction andreuse. Finally, we discuss the key remaining challenges and proposea critical outlook that emphasizes not only the technical and scientificadvancement of OSC recycling technologies but also the adoption ofa recyclability-by-design approach. Together, these efforts are essentialto enable sustainable organic electronic systems.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"6 3","pages":"484–493"},"PeriodicalIF":9.1,"publicationDate":"2026-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147964805","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":"Composite of Long Polymer Chains and Structured Silica Particles Achieves High Modulus and Low Hysteresis","authors":"Matthew Wei Ming Tan,&nbsp;Chenghai Li,&nbsp;Masako Yoshihara Yang,&nbsp;Mikaya Cooper Parente,&nbsp;Yakov Kutsovsky,&nbsp;Zhigang Suo","doi":"10.1021/acsmaterialsau.5c00258","DOIUrl":"10.1021/acsmaterialsau.5c00258","url":null,"abstract":"<p>Many applicationsrequire rubber-like materials to fulfilltwoimportant requirements: high modulus to resist excessive deformationand low hysteresis to reduce energy loss. High modulus is commonlyrealized by mixing rubber with inorganic fillers, but the fillersalso increase the hysteresis. This conflict between the modulus andhysteresis presents a challenge in material development. Here, weshow that a high modulus and low hysteresis are achieved simultaneouslyin a composite of long rubber chains and structured fillers. We preparea model system using natural rubber latex with long polymer chainsand structured fillers in which primary silica particles fuse intoaggregates. Each aggregate has an open structure that occludes therubber. The composite forms two networks: a network of cross-linkednatural rubber chains and a network of percolated silica aggregates.The two networks intertwine with each other and interlink throughcovalent bonds. We measure the modulus and hysteresis of the compositesprepared with various volume fractions of aggregates and molar fractionsof the initiator. We discuss the mechanisms by which long rubber chainsand structured silica aggregates lower hysteresis while maintaininga high modulus. This work provides insights into the development ofrubber products for energy efficiency.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"6 3","pages":"604–618"},"PeriodicalIF":9.1,"publicationDate":"2026-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147964752","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":"Precious Metal Dioxide Nanosheets: Bridging the Gap between Solution Chemistry and Solid-State Two-Dimensional Materials","authors":"Satoshi Tominaka,&nbsp;Daisuke Takimoto,&nbsp;Akihiko Machida,&nbsp;Tomoya Eda,&nbsp;Yuki Nakahira,&nbsp;Yuki Tokura,&nbsp;Wataru Sugimoto","doi":"10.1021/acsmaterialsau.5c00183","DOIUrl":"10.1021/acsmaterialsau.5c00183","url":null,"abstract":"<p>Unraveling the atomic structures of chemically exfoliatedpreciousmetal dioxide (PMD) nanosheets is the key to understanding their diverseproperties and realizing their potential in applications like catalysis.Using pair distribution function (PDF) analysis, we have solved thestructures of platinate and iridate nanosheets, revealing they bothadopt a T-MoS₂-type crystal structure. This discovery notonly establishes a crucial structural analogy to well-understood transitionmetal dichalcogenides (TMDs) but, more importantly, allows us to explainthe origins of their distinct properties. Our calculations based onthese structures correctly predict that the platinate nanosheet isa yellow semiconductor, while the iridate nanosheet is a blue semimetal.Having established this powerful structure–property relationship,we further probed the unique chemical nature of these materials. Wefound that the structural polymorphism (T- vs T′-type) is governedby intrinsic elemental characteristics, rather than simple redox statesas explored by in situ experiments. Instead of large-scale distortions,these nanosheets exhibit subtle short-range order (SRO) in their metalatom positions. This work provides a robust methodology for PMD researchand highlights that chemically imparted features like SRO are keyto designing the next generation of 2D materials.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"6 2","pages":"313–318"},"PeriodicalIF":9.1,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147469407","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":"How Realistic Are Idealized Copper Surfaces? A Machine Learning Study of Rough Copper–Water Interfaces","authors":"Linus C. Erhard,&nbsp;Johannes Schörghuber,&nbsp;Aleix Comas-Vives,&nbsp;Georg K. H. Madsen","doi":"10.1021/acsmaterialsau.5c00174","DOIUrl":"10.1021/acsmaterialsau.5c00174","url":null,"abstract":"<p>Copper is a highlypromising catalyst for the electrochemicalCO₂ reduction reaction (CO2RR) since it is the only puremetalthat can form highly added-value products such as ethylene and ethanol.Since the CO2RR takes place in aqueous solution, the detailed atomicstructure of the water–copper interface is essential for unravelingthe key reaction mechanisms. In this study, we investigate copper–waterinterfaces exhibiting nanometer-scale roughnesses. We introduce twomolecular dynamics protocols to create rough copper surfaces, whichare subsequently brought into contact with water. From these interfaces,we sample additional training configurations from machine-learning-interatomic-potential-drivenmolecular dynamics simulations containing hundreds of thousands ofatoms. An active learning workflow is developed to identify regionswith high spatially resolved uncertainty and convert them into DFT-feasiblecells through a modified amorphous matrix embedding approach. Finally,we analyze the local environments at the interface using unsupervisedmachine-learning techniques. Unique environments emerge on the roughcopper surfaces absent from model systems, including stacking-fault-inducedconfigurations and undercoordinated corner atoms. Notably, corneratoms consistently feature chemisorbed water molecules in our simulations,indicating their potential importance in catalytic processes.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"6 2","pages":"379–389"},"PeriodicalIF":9.1,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147469289","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":"Simultaneous Electrochemical Formation of Porous Silicon and Noble NPs for Au Nucleation Sites in SERS Substrates","authors":"Chia-Chi Lu,&nbsp;Hsiao-Han Hsu,&nbsp;I-An Lin,&nbsp;Vincent K. S. Hsiao,&nbsp;Chih-Chien Chu","doi":"10.1021/acsmaterialsau.5c00169","DOIUrl":"10.1021/acsmaterialsau.5c00169","url":null,"abstract":"<p>This study presents a one-step electrochemical etchingstrategythat enables the simultaneous formation of porous silicon (PSi) andin situ deposition of noble metal nanoparticles (NPs), which subsequentlyact as nucleation sites for gold growth to form bimetallic SERS substrates.Three metal precursors<span></span>K₂PtCl₄, HAuCl₄, and K₂PdCl₄<span></span>were systematicallycompared to elucidate how precursor type affects PSi morphology, nanoparticledistribution, and subsequent gold deposition. SEM and EDS analysesrevealed distinct deposition behaviors among the metals, leading tovaried gold nucleation efficiencies and SERS enhancement levels. HAuCl₄-treated substrates produced the highest absolute Raman intensity,while K₂PtCl₄-treated substrates exhibited lowerintensity but superior spectral quality with minimal fluorescencebackground and sharper peaks. XRD and XPS confirmed successful golddeposition and precursor-dependent interfacial interactions, includingthe formation of Pt–Au bimetallic interfaces. Reusability testsdemonstrated that the Pt-assisted substrates maintained stable performanceover multiple cycles, confirming their structural robustness and practicalfeasibility. Overall, this work provides mechanistic insight intohow noble metal interfaces govern SERS spectral characteristics andestablishes a rational pathway for designing PSi-based SERS substratesemphasizing spectral precision, reproducibility, and reusability ratherthan mere sensitivity enhancement.</p>","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"6 2","pages":"364–378"},"PeriodicalIF":9.1,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147469405","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":"ACS Materials Au: Announcing the 2025 Rising Stars in Materials Science","authors":"Stephanie L. Brock,&nbsp;Maksym V. Kovalenko,&nbsp;Mary Ann Meador","doi":"10.1021/acsmaterialsau.6c00052","DOIUrl":"10.1021/acsmaterialsau.6c00052","url":null,"abstract":"","PeriodicalId":29798,"journal":{"name":"ACS Materials Au","volume":"6 2","pages":"236–242"},"PeriodicalIF":9.1,"publicationDate":"2026-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147468739","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}