材料科学最新文献

{"title":"Spatial Atomic Arrangement of Cyclohexyl-Based Ligands for Enhanced Interface Passivation in 2D/3D Perovskite Solar Cells (Small 30/2025)","authors":"Yonghoon Jung,&nbsp;Seong Ho Cho,&nbsp;Seongheon Kim,&nbsp;Jieun Lee,&nbsp;Ki Tae Park,&nbsp;Yun Seog Lee","doi":"10.1002/smll.202570229","DOIUrl":"https://doi.org/10.1002/smll.202570229","url":null,"abstract":"<p><b>Perovskite Solar Cells</b></p><p>A comparative study of cis- and trans-hydroxylated cyclohexylammonium ligands in perovskite solar cells reveals distinct interfacial interactions with [PbI₆]⁴⁻ octahedra. The cis isomer preferentially anchors onto the 3D perovskite surface, forming a 2D/3D heterojunction that enables effective defect passivation and promotes efficient hole extraction across the perovskite–HTL interface, thereby enhancing charge transport and device performance. More in article number 2501564, Yun Seog Lee and co-workers.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":228,"journal":{"name":"Small","volume":"21 30","pages":""},"PeriodicalIF":13.0,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/smll.202570229","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Hydro-Expansive and Degradable Biomaterial Enabling Shape Recovery of Film-Based Devices in Biofluids.","authors":"Ruoxing Wang,Jiajie Sui,Pengfei Chen,Zulmari Silva-Pedraza,Jack Bontekoe,Jooyong Kim,Patrick Li,Fengdan Pan,Eric G Schmuck,Satoru Osaki,Bo Liu,Xudong Wang","doi":"10.1002/adma.202510140","DOIUrl":"https://doi.org/10.1002/adma.202510140","url":null,"abstract":"Hygroscopic actuation is an important material function, which enables a broad range of applications such as self-healing devices, soft robotics, and catheter implantation. With the current paradigm of implantable devices shifting toward soft and tissue-mimicking systems, this function however, is particularly weak in soft- and bio-materials due to the rapid loss of intermolecular interactions upon water incorporation. Here, a chitosan-based bio-composite is developed, which sustains the intermolecular repulsive force during water absorption through synergistic effects of hydrogen bonding, plasticization, and nano-confinement. When interact with body fluids, this material provides a stable and strong tensile force throughout its volume expansion process. Therefore, it serves as a functional coating that self-flattens a thin film-based device which holds a tubular shape needed for catheter delivery, and then degrades naturally. This capability is further demonstrated in vivo using a rolled triboelectric nanogenerator (TENG) for intracardiac implantation. The TENG device recovers its original shape after being placed inside the heart left ventricle and restores its regular energy harvesting function, evidencing the feasibility for minimally invasive implantation of flexible film-based devices.","PeriodicalId":114,"journal":{"name":"Advanced Materials","volume":"710 1","pages":"e10140"},"PeriodicalIF":29.4,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144720047","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":"Efficient and Stable Blue CsPbBr3 Perovskite Nanocrystals through Cd-Ion Thermal Doping of CdS Quantum Dots.","authors":"Jianjun Liu,Shengming Liu,Kazushi Enomoto,Retno Miranti,Yong-Jin Pu","doi":"10.1021/acsami.5c08245","DOIUrl":"https://doi.org/10.1021/acsami.5c08245","url":null,"abstract":"Blue-light halide perovskite nanocrystals (NCs) have faced significant limitations in optoelectronic applications due to challenges in size control, photoluminescent efficiency, and stability. This work introduces a novel thermal doping method by utilizing unique CdS quantum dots (QD) as a Cd source to convert green-light CsPbBr3 NCs to blue-light perovskite NCs. The dynamic dissociation of CdS QDs at 120 °C ensures a stable supply of Cd ions during the doping process. The doped cubic perovskite NCs, with an increased size (∼20 nm), exhibit efficient blue-light emission. Furthermore, the doped NCs demonstrate exceptional air and thermal stability in solid films, attributed to lattice contraction and reduced surface energy, effectively addressing common issues associated with blue-emitting perovskite NCs. This method provides a robust pathway for producing efficient and stable blue-light perovskite NCs, offering promising potential for enhancing the performance of blue-light perovskite NC-based light-emitting diode devices.","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":"103 1","pages":""},"PeriodicalIF":9.5,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144720079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tunable Gas Bubbles within Gas-Encapsulating Microcapsules (GEMs) for Buoyancy-Driven Purification.","authors":"Charles K Yeh,Yijin Huang,Luuk H Schoenmakers,Daeyeon Lee","doi":"10.1021/acsami.5c08301","DOIUrl":"https://doi.org/10.1021/acsami.5c08301","url":null,"abstract":"Certain aquatic microorganisms regulate buoyancy by producing intracellular gas vesicles. Separately, cavitation in drought-stressed plants illustrates how negative pressure can spontaneously generate gas bubbles. Inspired by both natural phenomena, we present gas bubble-encapsulating microcapsules (GEMs) that combine these principles, mimicking the buoyancy regulation of microbial gas vesicles and cavitation within plants by leveraging negative pressure to nucleate and control the size of gas bubbles. GEMs are derived from poly(d,l-lactide-co-glycolide) (PLGA) microcapsules with an aqueous core and a solid polymeric shell. Microcapsules experience a phenomenon known as osmosis-induced cavitation when transferred into an environment with high osmotic pressure. In this phenomenon, the internal aqueous phase experiences a large negative pressure, triggering cavitation, where gas bubbles nucleate and grow from dissolved air to form GEMs. This cavitation-based approach enables precise postfabrication control of bubble size by simply modulating the external salt concentration. We demonstrate that the buoyancy imparted by these internal gas bubbles allows for the effective purification of GEMs from impurities, such as polymer debris and defective microcapsules. Our strategy offers a straightforward, scalable, and highly controllable approach for producing GEMs. It also establishes a synthetic analogue to microbial gas vesicle systems with potential applications in purification, ultrasound theranostics, gastric drug delivery, and pressure-responsive delivery of active agents.","PeriodicalId":5,"journal":{"name":"ACS Applied Materials & Interfaces","volume":"46 1","pages":""},"PeriodicalIF":9.5,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144720082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Silicon-Modified Ti-Based Refractory High Entropy Alloys for Enhanced Strength and Reduced Density","authors":"Poonam Diwan, Abhinandan Kumar Thakur, Priyam Kashyap Sarmah, Santosh Kumar Tamang, R Jose Immanuel, Anil Kumar, Ankur Jaiswal","doi":"10.1016/j.jallcom.2025.182548","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.182548","url":null,"abstract":"This study examines the effect of silicon (Si) addition on the microstructure, mechanical properties, and corrosion behavior of Ti₄Al₁.₅Cr₁.₅V₁.₅Nb₁.₅Si_x (x = 0–0.75 atomic ratio) refractory high-entropy alloys (RHEAs) synthesized via vacuum arc melting. The base alloy exhibited a single-phase BCC structure, while Si addition promoted the formation of hard M₅Si₃ silicide. At 0.25 Si, the alloy achieved superior mechanical performance, with enhanced strength and ductility resulting from solid solution strengthening, grain refinement, and fine silicide dispersion. However, higher Si contents (0.50 and 0.75) led to increased brittleness due to coarse silicide growth and elemental segregation. Corrosion resistance improved initially due to stable passive film formation but deteriorated at higher Si levels owing to micro-galvanic effects and structural inhomogeneity. These results highlight that optimized Si incorporation (x = 0.25) offers a strategic pathway to develop lightweight, high-strength RHEAs with balanced mechanical integrity and corrosion resistance for extreme service environments.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"59 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144719507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of polymer coatings in lipid membrane penetration by graphene oxide dots","authors":"Giulia Frigerio, Paulo Siani, Edoardo Donadoni, Qiang Cui, Cristiana Di Valentin","doi":"10.1039/d5nr00838g","DOIUrl":"https://doi.org/10.1039/d5nr00838g","url":null,"abstract":"Understanding the cell membrane penetration process of biomedical nanosystems and its dependence on nanomaterial properties and surface functionalization is crucial for the rational design of safe and efficient cellular internalization strategies. Computer simulations are powerful tools to evaluate the thermodynamic aspects of the process and to elucidate its underlying molecular mechanisms. In this work, the interaction between uncoated or polymer-coated graphene oxide (GO) dots and lipid bilayer models is investigated by coarse-grained (CG) molecular dynamics (MD) simulations. We first validate the coarse-grained model against all-atom MD simulations (AAMD). Then, we perform CGMD simulations and free energy calculations to assess the effect of the polymeric coating and of its features (grafting density, polymer end-group charge and polymer hydrophilic/hydrophobic character) on the interaction between GO dots of realistic size and lipid membranes. We find that the membrane penetration of GO dots is spontaneous when coated with a low-density polyethylene glycol (PEG) layer, while a high-density PEG coating prevents the penetration, and a mixed PEG/polyethylene (PE) coating excessively stabilizes the nanosystem in the inner membrane region. These findings will help to fine-tune how GO dots interact with cellular membranes.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"1 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144719653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Beyond Traditional TOF: Unveiling the Pitfalls in Electrocatalytic Active Site Determination","authors":"Arun Karmakar, Subrata Kundu","doi":"10.1039/d5ta04810a","DOIUrl":"https://doi.org/10.1039/d5ta04810a","url":null,"abstract":"Turnover frequency (TOF) is a fundamental metric for evaluating the intrinsic activity of an electrocatalysts for water splitting. Moreover, being associated with free energy changes of the overall process (according Arrhenius formula) the TOF serves as a significant metrics that deals with molecular origin of electrocatalytic activity compared to conventional current density or overpotential as the standard descriptors. For instance, current density signifies the overall rate of an electrochemical reaction, however, it is influenced by the number of electrochemical active sites (ECASs). Which making it hard to distinguish whether the catalytic activity is due to the quality of active sites or due greater number of reactive centres. TOF, on the other hand, defines per site activity shedding light on the real efficiency of the individual active sites. While catalyst with larger ECAS may exhibit higher current densities, their TOF can be significantly lower due to less efficient active sites. This showcases the importance of optimizing not just the quantity, but the quality and electronic environment of active sites to achieve efficient electrocatalysis. Further detail kinetic analysis, considering multi-step electrocatalytic process reveals that the rate constant or TOF is mainly govern by the rate-determining step (RDS) of the catalytic cycle and the nature of the active site involved. Conventional electrochemical and non-electrochemical ways of determining electrochemical active site (ECAS) for an electrocatalyst are facing a serious limitation as the calculated TOF value from this does not reflect its intrinsic nature. ECAS determination via various electrochemical methods suffers from a strong dependence on the catalyst loading, scan rate, and substrate selected for electrochemical analysis. Direct measurement of ECAS via ICP-MS, and structural characterization may lead to overestimation by assuming 100% atom utilization. Moreover, none of the reported procedure consider the importance of RDS in the catalytic cycle. Using theoretical analysis, in-situ spectroscopic technique and various electrochemical analyses have proven effective in identifying the nature of RDS and active sites involved. Therefore, integrating such advance measurement along with standard electro/non-electrochemical technique can provide a more accurate picture of TOF which certainly would help to developed effective electrocatalyst for sustainable hydrogen production in future.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":"28 1","pages":""},"PeriodicalIF":11.9,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144719809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structurally Colored Sustainable Sea Silk from Atrina pectinata (Adv. Mater. 30/2025)","authors":"Jimin Choi,&nbsp;Jun-Hyung Im,&nbsp;Young-Ki Kim,&nbsp;Tae Joo Shin,&nbsp;Patrick Flammang,&nbsp;Gi-Ra Yi,&nbsp;David J. Pine,&nbsp;Dong Soo Hwang","doi":"10.1002/adma.202570212","DOIUrl":"https://doi.org/10.1002/adma.202570212","url":null,"abstract":"<p><b>Sustainable Golden Luxury Sea Silk</b></p><p>In article number 2502820, Gi-Ra Yi, David J. Pine, Dong Soo Hwang, and co-workers present a sustainable sea silk derived from <i>Atrina pectinata</i>, a relative of the endangered <i>Pinna nobilis</i>, historically used to produce golden sea silk. Its golden threads feature hierarchically organized photonins and vivid structural coloration stabilized by sugar–lectin interactions—offering a sustainable luxury for replicating ancient golden textiles and long-lasting gold pigments.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":114,"journal":{"name":"Advanced Materials","volume":"37 30","pages":""},"PeriodicalIF":27.4,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adma.202570212","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"Christian Tantardini*,&nbsp;Maryam Azizi,&nbsp;Tariq Altalhi,&nbsp;Alexander G. Kvashnin,&nbsp;Alessio Filippetti,&nbsp;Carlo Gatti,&nbsp;Boris I. Yakobson and Xavier Gonze*,&nbsp;","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"19 29","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":15.8,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsnano.5c05027","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144715856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"","authors":"Hyeonjeong Kim,&nbsp;Hyeon Ji Kim and Youngho Eom*,&nbsp;","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":21,"journal":{"name":"ACS Nano","volume":"19 29","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":15.8,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acsnano.5c03399","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144715865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}