Materials Today Nano最新文献

{"title":"Engineering whispering gallery modes in MoSe2/WS2 double heterostructure nanocavities: Towards developing all-TMDC light sources","authors":"P.A. Alekseev ,&nbsp;I.A. Milekhin ,&nbsp;K.A. Gasnikova ,&nbsp;I.A. Eliseyev ,&nbsp;V. Yu. Davydov ,&nbsp;A.A. Bogdanov ,&nbsp;V. Kravtsov ,&nbsp;A.O. Mikhin ,&nbsp;B.R. Borodin ,&nbsp;A.G. Milekhin","doi":"10.1016/j.mtnano.2025.100633","DOIUrl":"10.1016/j.mtnano.2025.100633","url":null,"abstract":"<div><div>Transition metal dichalcogenides (TMDCs) have emerged as highly promising materials for nanophotonics and optoelectronics due to their exceptionally high refractive indices, strong excitonic photoluminescence (PL) in monolayer configurations, and the versatility to engineer van der Waals (vdW) heterostructures. In this work, we exploit the intense excitonic PL of a MoSe₂ monolayer combined with the high refractive index of bulk WS₂ to fabricate microdisk cavities with tunable light emission characteristics. These microdisks are created from a 50-nm-thick WS₂/MoSe₂/WS₂ double heterostructure using frictional mechanical scanning probe lithography. The resulting cavities achieve a 4-10-fold enhancement in excitonic PL from the MoSe₂ monolayer at wavelengths near 800 nm. The excitonic PL peak is modulated by sharp spectral features, which correspond to whispering gallery modes (WGMs) supported by the cavity. A microdisk with a diameter of 2.35 μm demonstrates WGMs with a quality factor of up to 700, significantly surpassing theoretical predictions and suggesting strong potential for lasing applications. The spectral positions of the WGMs can be finely tuned by adjusting the microdisk's diameter and thickness, as confirmed by theoretical calculations. This approach offers a novel route for developing ultra-compact, all-TMDC double heterostructure light sources with record-small size.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"30 ","pages":"Article 100633"},"PeriodicalIF":8.2,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084083","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":"Boron-doped carbon nanowalls as effective electrodes for non-enzymatic electrochemical glucose detection: A novel bimodal EC-SALDI-MS approach","authors":"I.S. Hosu ,&nbsp;M. Sobaszek ,&nbsp;M. Ficek ,&nbsp;R. Bogdanowicz ,&nbsp;Y. Coffinier","doi":"10.1016/j.mtnano.2025.100635","DOIUrl":"10.1016/j.mtnano.2025.100635","url":null,"abstract":"<div><div>For the first time, boron-doped carbon nanowalls (B-CNWs) have been used as effective working electrodes for non-enzymatic electrochemical glucose detection. To achieve optimal response time and sensitivity, we activated B-CNWs by polarising them at 1.1 V in NaOH for 60 min. We established a robust linear dynamic range for glucose concentrations from 10 to 550 μM and calculated a limit of detection (LoD) of 10 μM. Additionally, B-CNWs demonstrated excellent selectivity for glucose, even in the presence of various interfering compounds like its isomer, galactose. Importantly, we showed that B-CNWs could detect gluconic acid, the oxidation product of glucose, using mass spectrometry in an off-line configuration. This novel approach combines electrochemical (EC) and surface-assisted laser desorption/ionisation mass spectrometry (SALDI-MS) detection, utilising the same nanomaterial (B-CNWs) in a bimodal configuration. This coupling represents a significant advancement in glucose sensing technology by leveraging the unique properties of B-CNWs and providing a powerful analytical tool for detecting, identifying, and understanding a wide range of chemical compounds and processes.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"30 ","pages":"Article 100635"},"PeriodicalIF":8.2,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070632","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":"Self-assembly of centimeter-long micron-diameter fibers of isotropic spherical silica nanoparticles","authors":"Igor Sokolov ,&nbsp;Tong Gao","doi":"10.1016/j.mtnano.2025.100636","DOIUrl":"10.1016/j.mtnano.2025.100636","url":null,"abstract":"<div><div>We present a novel evaporation-driven concept for self-assembly of centimeter-scale anisotropic mesostructures from isotropic nanoscale components in solution. These centimeters-long micron-diameter fibers are grown from an aqueous dispersion of 60 nm isotropic silica nanoparticles during the drying. We propose that water evaporation drives nanoparticle aggregation into porous structures, amplifying further evaporation and nanoparticle transport to fuel continuous fiber growth via a self-sustaining process. A theoretical model capturing the essence of the growth process closely matches experimental observations, suggesting the mechanism is likely nanoparticle-independent as interparticle interactions play a negligible role. This study introduces a new paradigm in self-organization, which is distinct from previous works relying on particle anisotropy or osmotic forces. Combining evaporation and nanoparticle dynamics opens exciting avenues for exploring and applying self-assembly in nanotechnology, promising novel materials with unique properties and functionalities.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"30 ","pages":"Article 100636"},"PeriodicalIF":8.2,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144106693","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":"Revisiting the structural dynamics of gold clusters by machine learning force field","authors":"Li Ping Ding ,&nbsp;Hang Liu ,&nbsp;Hong Yuan Xu ,&nbsp;Shao Fei Lei ,&nbsp;Peng Shao ,&nbsp;Feng Ding","doi":"10.1016/j.mtnano.2025.100634","DOIUrl":"10.1016/j.mtnano.2025.100634","url":null,"abstract":"<div><div>The structural evolution of gold clusters has been investigated by numerous density functional theory (DFT) studies. However, due to the slow computational efficiency of DFT, these studies tend to be scattered and lack systematicness. We have developed a robust machine learning force field (MLFF) of gold. The accuracy and robustness of the MLFF were validated by comparing DFT results. By integrating the highly efficient MLFF, which is about 1000,000 times faster than DFT calculations, with the CALYPSO global search method, we systematically explored Au_<em>n</em> clusters spanning a wide range of sizes (<em>n</em> = 2–55) and uncovered several key issues: (<em>i</em>) revealing the critical transition points from planar to 3D structures (<em>n</em> = 14) and from cage-like to core-shell structures (<em>n</em> &gt; 26); (<em>ii</em>) discovering new stable cluster structures; (<em>iii</em>) conducting an in-depth analysis of the core-shell model. This study shows that MLFF can be used to study complex structural systems like clusters and address systematic issues related to larger clusters. It also indicates the potential of MLFF in tackling more complex problems, including mixed and ligand-protected clusters.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"30 ","pages":"Article 100634"},"PeriodicalIF":8.2,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143934931","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":"Design and fabrication of self-supporting, ultra-flexible, multi-heterogeneous CNT@MOF buckypaper with microwave absorption and energy storage properties","authors":"Yanzhi Cai ,&nbsp;Siyu Guo ,&nbsp;Laifei Cheng ,&nbsp;Yibing Yuan ,&nbsp;Zixuan Yu ,&nbsp;Shaoxiong Ren ,&nbsp;Mingxing Chen ,&nbsp;Yalong Chai ,&nbsp;Xue Huang","doi":"10.1016/j.mtnano.2025.100632","DOIUrl":"10.1016/j.mtnano.2025.100632","url":null,"abstract":"<div><div>The rapidly growing demand for wearable electronics with anti-electromagnetic interference, self-powering capabilities, and ultra-flexible has created a pressing need for advanced materials that can address these challenges simultaneously. Current material systems face inherent contradictions: while microwave-absorbing materials require controlled conductivity to prevent impedance mismatch, electrode materials necessitate high conductivity for efficient charge transport. To resolve this dichotomy, a self-supporting, ultra-flexible CNT@NiCo-MOF buckypaper (CNT@NCM BP) was fabricated without the need for additional adhesive, employing a solvothermal method combined with the directional pressure filtration technique. By virtue of the synergistic interaction between MOF and CNT, the BP exhibits remarkable microwave absorption and energy storage properties. The BP achieved a minimum reflection loss of −58.3 dB and an ultra-wide effective absorption bandwidth of 7.0 GHz, particularly in the 2–8 GHz low-frequency range. Moreover, the BP electrode exhibited a specific capacitance of 16.91 F·cm⁻² when operated at 3 mA·cm⁻² current density. The ultra-flexible all-solid symmetric supercapacitor (ASSC) achieved an impressive energy density of 1.10 mWh·cm⁻² paired with a power density of 10.5 mW·cm⁻². Moreover, ASSC exhibits extremely high cyclic stability (108.8 % after 10000 cycles) at 50 mA·cm⁻². And, the BP demonstrates ultra-flexibility by maintaining structural integrity under various mechanical deformations. This study aims to construct a multifunctional self-supporting material that integrates electromagnetic protection with a self-powered energy system into flexible electronic products.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"30 ","pages":"Article 100632"},"PeriodicalIF":8.2,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143934933","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":"Exploring ultrathin tungsten disulfide as a diffusion barrier for copper interconnects: advanced packaging reliability and a first-principles study","authors":"Vijay D. Chavan ,&nbsp;Touko Lehenkari ,&nbsp;Suhas Yadav ,&nbsp;Ruhan E. Ustad ,&nbsp;Zulfqar Ali Sheikh ,&nbsp;Ajay T. Avatare ,&nbsp;Tushar P. Kamble ,&nbsp;Laraib Sajjad ,&nbsp;Hannu-Pekka Komsa ,&nbsp;Sandip Sabale ,&nbsp;Kyeong-Keun Choi ,&nbsp;Seungbae Park ,&nbsp;Ghulam Dastgeer ,&nbsp;Honggyun Kim ,&nbsp;Deok-kee Kim","doi":"10.1016/j.mtnano.2025.100631","DOIUrl":"10.1016/j.mtnano.2025.100631","url":null,"abstract":"<div><div>The robust diffusion barriers (DB) are crucial due to the significant prevention of copper (Cu) diffusion/migration, which negatively affects interconnect reliability and compatibility in advanced packaging. With a half-pitch size (20 nm and below) a conventional Ta/TaN DB has a thickness limit to shrinkage below 4 nm, addressing the limited Cu conductivity, and inferior barrier properties to block Cu diffusion. Therefore, ultrathin 0.7 nm tungsten disulfide (WS₂) is utilized as a pioneering DB for Cu interconnects to address this issue. Herein, W is primarily sputtered and sulfurized at 400 °C to convert into WS₂, later confirmed by several characterizations. Based on JE, CV, temperature-dependent breakdown, and DFT verification, we conclude that the ultrathin 0.7 nm WS₂ effectively blocks the Cu diffusion in the range of 9.7–10 MV/cm. Notably, the research is strongly supported by reliability tests, including (−200 to 400 °C) temperature-dependent JE at both low (14.8 MV/cm) and high (8 MV/cm) temperatures, Cu electroplating, warpage tests, tape tests, and other relevant evaluations, which are currently of significant interest in packaging. The obtained results show that the WS₂ DB serving both liner/barrier properties is excellent as compared to conventional Ta(liner)/TaN(barrier). The study demonstrates that WS₂ is BEOL-compatible and industry-friendly, facilitating interconnect scaling beyond the current technology node, and we should not be surprised if used in future advanced packaging.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"30 ","pages":"Article 100631"},"PeriodicalIF":8.2,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143934932","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":"Tailoring the carbon nanofibers with Ti3C2Tx MXene as precursor to enhance the electromagnetic attenuation properties","authors":"Pingan Chen ,&nbsp;Sizeng Hong ,&nbsp;Xiangcheng Li ,&nbsp;Yingli Zhu ,&nbsp;Fu Chen ,&nbsp;Mengke Qiao","doi":"10.1016/j.mtnano.2025.100630","DOIUrl":"10.1016/j.mtnano.2025.100630","url":null,"abstract":"<div><div>Carbon nanofibers can be widely used in the field of electromagnetic wave absorption due to corrosion resistance, low density and good chemical stability. Here, we report a strategy to achieve strong microwave absorption capability by adjusting the crystallinity of carbon nanofibers containing Al₂O₃ and TiO₂. TiO₂ with Ti₃C₂T_x MXene as a precursor decreases the crystallization temperature of Al₂O₃ from 1400 °C to 800 °C in the carbon nanofibers. The diameter distribution of carbon nanofibers is uniform, though the surface of carbon nanofibers is getting rough with Ti₃C₂T_x content increasing. The minimum reflection loss of carbon nanofibers is −55.78 dB at a thickness of 4.32 mm; the effective absorption bandwidth reaches 5.41 GHz (12.59–18 GHz) at a thickness of 1.67 mm, almost covering the Ku band. The excellent microwave absorption performance can be attributed to the synergistic effect of the non-crystalline carbon matrix and crystalline Al₂O₃/TiO₂, in which the former improves impedance matching with free space, while the latter enhances the attenuation capability to the electromagnetic wave.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"30 ","pages":"Article 100630"},"PeriodicalIF":8.2,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918103","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":"Reducing friction and wear with alkyl gallate additives in water-based lubricants","authors":"Yun Long ,&nbsp;Jean Michel Martin ,&nbsp;Frederic Dubreuil ,&nbsp;Benoit Thiebaut ,&nbsp;Sophie Loehle ,&nbsp;Huong T.T. Ta ,&nbsp;Mauro Ferrario ,&nbsp;M. Clelia Righi ,&nbsp;Maria-Isabel De Barros Bouchet","doi":"10.1016/j.mtnano.2025.100629","DOIUrl":"10.1016/j.mtnano.2025.100629","url":null,"abstract":"<div><div>Environmental concerns have made the development of non-flammable, high-specific heat capacity, and high-performance lubricants an urgent priority, driving an increased demand for aqueous-based formulations. A key challenge for their widespread application is achieving low friction across a broad range of speeds. A low-viscosity system composed of polyalkylene glycol (PAG), water, and diethylene glycol offers superlubricity (i.e., friction coefficient ≤0.01) at rolling speeds above 150 mm/s; however, significant friction remains at lower rolling or sliding speeds. This limitation can be addressed by introducing eco-friendly and non-toxic gallate molecules. For example, adding 1 % lauryl gallate stabilizes the friction coefficient at approximately 0.04 with no measurable wear. To activate the anti-friction and anti-wear properties of gallates, the molecules must have alkyl chains with eight or more carbon atoms.</div><div>Large-scale molecular dynamics simulations have been conducted to explore the key mechanisms by which gallate molecules achieve such superior lubricity. This is made possible through innovative machine learning techniques that enable simulations with Density Functional Theory (DFT) accuracy, allowing the modeling of large systems over extended timescales. Simulations reveal that the superior lubricity of gallates results from the strong anchoring of molecular patches that chemisorb onto the iron surface in specific orientations, enabling the alkyl chains to form an inert cushion at the steel/steel interface. Lubrication occurs thanks to this chemical inert buffer region, which effectively separates the metal surfaces realizing a beneficial friction and wear reducing tribofilm, with a clear dependence on the chain length. These findings by a combined experimental-computational approach provide valuable insights for the development of sustainable lubricants, advancing the field of green tribology.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"30 ","pages":"Article 100629"},"PeriodicalIF":8.2,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143882484","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":"A review on application of nanomaterials in flexible pressure sensors","authors":"Shirin Mohamadzade ,&nbsp;Seyedeh-Arefeh Safavi-Mirmahalleh ,&nbsp;Sajjad Habibzadeh ,&nbsp;Farid Behboodi-Sadabad ,&nbsp;Mehdi Salami-Kalajahi","doi":"10.1016/j.mtnano.2025.100627","DOIUrl":"10.1016/j.mtnano.2025.100627","url":null,"abstract":"<div><div>Flexible pressure sensors are modern devices that play a pivoting role in flexible electronics technology due to their unique features, including bio-integrated circuits, biocompatibility, flexibility, and light weight. Over the past several years, numerous emerging nanomaterials driven by innovations in molecular nanosystems and representing outstanding electromechanical properties have been developing. This could pave the way for effectively addressing the need for higher performance and broadening the emerging applications of flexible pressure sensors. The progressive development of flexible pressure sensors highlights the necessity of reviewing and categorizing such advanced devices in order to open new avenues of innovation and thoughts. Herein, diverse angles of flexible pressure sensors, including their chemistry, signal conversion methods, and signal transfer performance, are reviewed and discussed. In particular, nanostructured flexible pressure sensors composed of nanomaterials like carbon black, carbon nanotubes, graphene, metal nanowires, transition metal dichalcogenides (TMDs), hexagonal boron nitride (hBN), 2D carbides and nitrides of transition metals (MXenes), and black phosphorus (BP) are summarized, together with their pros and cons are systematically discussed. Finally, this review deals with a number of key applications, including healthcare and biomedical fields, human-machine interfaces, robotics, and smart systems.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"30 ","pages":"Article 100627"},"PeriodicalIF":8.2,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143879024","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":"Physical mechanisms and integration design of memristors","authors":"Mengna Wang ,&nbsp;Kun Wang ,&nbsp;Bai Sun ,&nbsp;Guangdong Zhou ,&nbsp;Zelin Cao ,&nbsp;Kaikai Gao ,&nbsp;Fenggang Ren ,&nbsp;Xiaoliang Chen ,&nbsp;Xiangming Li ,&nbsp;Jinyou Shao","doi":"10.1016/j.mtnano.2025.100628","DOIUrl":"10.1016/j.mtnano.2025.100628","url":null,"abstract":"<div><div>Memristors with threshold transition behavior and rich dynamics are ideal candidates for simulating biological pulse neurons and constructing efficient neuromorphic systems. Based on changes in material structure, charge distribution, molecular polarization and other physical states, new integrated memory-computing devices have been constructed and applied to the sensor-memory-computing integrated systems. In this review, we first discuss the classification of memristive materials from the perspective of device structure design and focus on introducing the working mechanisms of valence variation, polarization, and carrier transfer covered internally. Further, the latest progress of memristors with multi-physical mechanisms is comprehensively summarized, including the formation/fracture of conductive filaments, carrier capture/release, polarization/depolarization. In particular, it is discussed in detail the principles and applications of memristors with different working mechanisms for constructing neuromorphic systems. Finally, the potential challenges and opportunities that may exist in the development of memristors in the coming years are discussed in depth.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"30 ","pages":"Article 100628"},"PeriodicalIF":8.2,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143879023","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}