Nanoscale最新文献

{"title":"Effect of annealing temperature on the properties of CsPbBr3 nanocrystal films via inkjet printing and its application in colour conversion layers†","authors":"Junaid Khan, Júlia Marí-Guaita, Kenneth Lobo, Giovanni Vescio, Carina Pareja-Rivera, Iván Mora-Seró, Sergi Hernández, Albert Cirera and Blas Garrido","doi":"10.1039/D5NR01385B","DOIUrl":"10.1039/D5NR01385B","url":null,"abstract":"<p >Inkjet printing has emerged as a sustainable and scalable approach for fabricating electronic and optoelectronic devices, offering precise material deposition with minimal waste. Among solution-processable materials, metal halide perovskites, particularly CsPbBr<small>₃</small>, have gained significant attention due to their exceptional optoelectronic properties, including high photoluminescence quantum yield, tuneable bandgap, and efficient charge transport. However, optimizing the inkjet-printing process remains a challenge, particularly post printing annealing since CsPbBr<small>₃</small> nanocrystals are sensitive to environmental conditions. In this study, we systematically investigate the effect of annealing temperature on the structural, morphological, and photoluminescence properties of inkjet-printed CsPbBr<small>₃</small> films. Our results reveal that thermal treatment plays a pivotal role in controlling grain size, crystallinity, defect density, and overall optoelectronic behaviour. Notably, a remarkable 70-fold enhancement in photoluminescence emission was observed, alongside a crystal structure morphology evolution from 3D to 0D and 2D structures through simple annealing offering transformative potential for optoelectronic applications. By elucidating the interplay between annealing conditions and film characteristics, this work provides key insights for optimizing inkjet-printed perovskite films, driving advancements in next-generation, sustainable, and high-performance printed electronics. The application of the printed films was successfully demonstrated as efficient colour conversion layers for optoelectronic devices.</p>","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":" 30","pages":" 17803-17815"},"PeriodicalIF":5.1,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/nr/d5nr01385b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144669477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Advances in Microneedle Technology for Skin Wound Healing: Integrating Nanomaterials and Intelligent Drug Delivery Systems","authors":"Yuqing Wang, Yao He, Tao Zhang, Yunfeng Lin","doi":"10.1039/d5nr01953b","DOIUrl":"https://doi.org/10.1039/d5nr01953b","url":null,"abstract":"Recent clinical challenges in wound healing, particularly chronic non-healing wounds such as diabetic ulcers and burn injuries, highlight the limitations of current treatments in achieving rapid healing, infection control, and scar reduction. The integration of nanomaterials with microneedle technology—an emerging platform for transdermal drug delivery and microenvironment regulation—offers significant advantages in addressing these challenges. By incorporating functional nanomaterials such as nanonzymes, metal nanoparticles, and antimicrobial nanostructures, microneedle platforms enhance local hemostasis, infection suppression, inflammation regulation, angiogenesis, and tissue regeneration. Despite promising results, research in this area remains limited, with most studies focusing on specific molecular mechanisms or single applications. This review evaluates the potential of nanomaterial-integrated microneedle systems for complex wound treatment, emphasizing gene regulation, immune modulation, and tissue regeneration. It also discusses their role in regulating inflammatory factors, accelerating epidermal regeneration, and optimizing the wound microenvironment. The review concludes by proposing future directions for responsive microneedle systems capable of dynamic drug release and precision interventions, paving the way for personalized treatment and improved clinical outcomes in complex wound management. Therefore, this review aims to provide a comprehensive overview of the recent advances in nanomaterial-integrated microneedle systems for skin wound healing. We focus on how these hybrid platforms enable multifunctional drug delivery, regulate the wound microenvironment, and support intelligent, responsive interventions. By summarizing both mechanistic insights and translational opportunities, we hope to offer perspectives that will guide future research and clinical applications in complex wound management.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"47 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144669902","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":"Tunable ion relaxation process of thermoelectric system for adjustable memory of thermal perception","authors":"Wenjin Wang, Zhiwu Chen, Xun Wu, Xinlei Li, Mingqi Zhao, Antong Ma, Yapei Wang","doi":"10.1039/d5nr01895a","DOIUrl":"https://doi.org/10.1039/d5nr01895a","url":null,"abstract":"Ionic thermoelectric materials based on Soret effect exhibit sensitive temperature perception and memory behavior due to the differential ion thermodiffusion under temperature gradient and spontaneous ion relaxation after temperature withdrawal. This principle has become an alternative material scheme for artificial tactile neural systems. However, modulating ion relaxation process of the thermoelectric systems to match synaptic plasticity in humanoids for short- and long-term memory remains challenging. Hence, the strategy of interfacial modification of ion diffusion channels is proposed for interfering with ion relaxation. The interfacial molecules, which exhibit repulsive interactions with ion species, can increase the coulombic interactions between the ion pairs of bulk phase through long-range induction, which results in the ion diffusion in large-size clusters, and thus prolong the relaxation time of the ions. Conversely, the relaxation of ions will be accelerated. Furthermore, this strategy of interfacial modification is extended to paper-based porous materials to construct a neuromorphic integrated system for temperature perception and memory. Relying on the long-range induced interactions of interfacial molecules to accelerate or delay the relaxation process of ions, the regulation of time scale of temperature memory is successfully achieved, which meets the functional requirements of the artificial tactile neural systems for short- and long-term temperature memory.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"102 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144669904","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":"Silver nanostructure-loaded starch functionalized magnetite (Ag/s-Fe3O4) photocatalyst for H2O2 production: Experimental and molecular dynamics studies","authors":"Uttam Kumar, Jyoti Kuntail, Shaili Pal, Mrinal Pai, Xenophon Krokidis, Andreas Bick, Indrajit Sinha","doi":"10.1039/d5nr01805f","DOIUrl":"https://doi.org/10.1039/d5nr01805f","url":null,"abstract":"The present research investigates photocatalytic H2O2 formation on a composite of Ag and starch-stabilized Fe3O4 (denoted as s-Fe3O4) nanoparticles. Starch functionalization of the Fe3O4 part significantly improved the hydrophilicity of the composite. The charge carrier separation efficiency and photocatalytic activity changed with the amount of Ag loading on s-Fe3O4. H2O2 production on this photocatalyst was investigated in pure water and aqueous solutions of various green sacrificial agents like glycerol. Classical molecular dynamics (MD) was employed to study the adsorption affinity of O2 and H2O on the surface of Fe3O4, s-Fe3O4, and Ag/s-Fe3O4 in an aqueous medium. MD results indicate that functionalizing Fe3O4 with starch (s-Fe3O4 system) enhances water adsorption affinity, and precipitating Ag nanostructures on s-Fe3O4 (Ag/s-Fe3O4) increases O2 adsorption affinity. Water contact angle measurements on Fe3O4, s-Fe3O4, and Ag/s-Fe3O4 nanoparticles also quantify significantly better water adsorption due to starch functionalization. An aqueous solution of glycerol exhibited the best photocatalytic H2O2 production activity. This result is critical given that glycerol is green, economical, and a byproduct of the biodiesel industry. A photocatalysis mechanism for H2O2 generation on Ag/s-Fe3O4 photocatalysts has been proposed based on a series of control experiments and molecular dynamics simulations.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"13 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144669909","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":"Perpendicular sheet-like alignment of a self-driven MoS2/Si heterostructure for Vis-NIR wavelength detection†","authors":"Othman Abed Fahad, Abubaker S. Mohammed, Ethar Yahya Salih and Mustafa K. A. Mohammed","doi":"10.1039/D5NR02331A","DOIUrl":"10.1039/D5NR02331A","url":null,"abstract":"<p >In this article, a self-powered heterostructure based on perpendicularly aligned n-MoS<small>₂</small>/p-Si was fabricated for Vis-NIR wavelength detection. In particular, MoS<small>₂</small> sheet-like morphology was attained <em>via</em> hydrothermal treatment at two crystallization temperatures (180 °C and 240 °C). The average thicknesses of the sheet-like structures were 85 and 45 nm for samples treated at 180 °C and 240 °C, respectively. The proposed geometry exhibited rectifying behavior, with the <em>I</em><small>_ph</small>/<em>I</em><small>_D</small> ratio reaching the order of ∼10<small>³</small> at zero applied bias, indicating the self-powered nature of the demonstrated MoS<small>₂</small>/Si heterostructure; this was attained along with an <em>R</em><small>²</small> value close to unity as a function of the applied light intensity variation. Photoresponsivity (<em>R</em><small>_λ</small>) exhibited wide reaching performance (Vis-NIR) with a peak value of 0.36 mA W<small>⁻¹</small> at 625 nm and 6 mW cm<small>⁻²</small>, this was acquired at zero applied bias. <em>R</em><small>_λ</small> demonstrated a descending profile as the intensity of incident light increased to 17 mW cm<small>⁻²</small> (0.19 mA W<small>⁻¹</small>). The response and recovery time of the fabricated devices (180 °C and 240 °C) exhibited rather fast episodes with values of 0.178/0.181 and 0.176/0.185 s, respectively, which in turn indicated faster electron injection than recombination.</p>","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":" 30","pages":" 17795-17802"},"PeriodicalIF":5.1,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144669479","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":"Hydrogenation Effects on the Structural Stability and Superconducting Properties of Calcium-Intercalated Bilayer Graphene C2CaC2","authors":"Jakkapat Seeyangnok, Udomsilp Pinsook","doi":"10.1039/d5nr02561c","DOIUrl":"https://doi.org/10.1039/d5nr02561c","url":null,"abstract":"Two-dimensional (2D) materials have attracted significant interest due to their exceptional properties and potential applications in condensed matter physics and nanotechnology. Elemental substitution is a common approach to tuning the physical properties of materials. Among these strategies, intercalation has been shown to enhance superconductivity in 2D materials. Likewise, hydrogenation of pristine 2D materials has been extensively studied for its potential to improve superconducting properties. Recently, it has been proposed that ca-intercalated bilayer graphene, C$_2$CaC$_2$, is stable and exhibits a superconducting critical temperature of $T_c = 18.9$~K. In this study, we investigate the effects of hydrogenation on the structural stability and superconducting properties of C$_2$CaC$_2$. Using first-principles calculations, we examine various hydrogenation configurations and identify the most stable phase, the HC$_2$CaC$_2$, which is found to be dynamically and thermally stable at room temperature, as confirmed by phonon dispersion and ab initio molecular dynamics (AIMD) simulations. The system exhibits metallic behavior, with electronic states at the Fermi level primarily contributed by carbon $p_z$ orbitals. The electron-phonon coupling constant is calculated to be $lambda = 0.56$, with low-frequency vibrations of Ca and C atoms dominating the coupling. The superconducting critical temperature, estimated using the well-known Allen-Dynes formula, yields a typical value of $T_c = 6.1$~K for a standard Coulomb pseudopotential ($mu^* = 0.1$). Despite the lower $T_c$ compared to pristine C$_2$CaC$_2$, hydrogenation preserves structural stability and metallicity, offering insights into tunable superconductivity in intercalated 2D materials.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"118 Suppl 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144669903","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":"A new computational approach for evaluating bending rigidity of graphene sheets incorporating disclinations.","authors":"Yushi Kunihiro,Xiao-Wen Lei,Takashi Uneyama,Toshiyuki Fujii","doi":"10.1039/d5nr01102g","DOIUrl":"https://doi.org/10.1039/d5nr01102g","url":null,"abstract":"Two-dimensional (2D) materials exhibit remarkable flexibility and can be transformed into various shapes. Graphene sheets (GSs), in particular, can form conical or saddle-like shapes through the introduction of lattice defects known as disclinations, represented by 5- and 7-membered rings, respectively. These rotational-type lattice defects possess relatively large spontaneous curvature and significantly affect the bending rigidity of the GS. Despite increasing interests in exploiting such deformations for material design, evaluating the bending rigidity of GSs with lattice defects remains challenging owing to the complexity introduced by curvature and defect configurations. In this study, we propose a novel computational method that integrates the Helfrich theory of membranes with molecular-dynamics simulations to analyze the effect of curvature and defect patterns on the bending rigidity of GSs. This hybrid approach enables the direct evaluation of bending rigidity from atomic and geometric structures, eliminating the need for experimental bending tests. Using this method, we reveal, for the first time, contrasting trends in bending rigidity between GSs with monopole and dipole disclinations. In the presence of disclination monopoles, the bending rigidity remains independent of the specific structural pattern. Conversely, disclination dipoles, comprising both conical and saddle-shaped surfaces, induce local shape distortions that lead to localized variations in bending rigidity. These findings provide important guidelines for the design of 2D materials with specific bending rigidities, supporting the development of new materials.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"22 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144669478","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":"Basic features of Pt/C catalysts synthesis by non-isothermal decomposition of platinum acetylacetonate","authors":"Alexandra B. Kuriganova, N. V. Smirnova, Alexey N. Yatsenko, Mikhail Vladimirovich Gorshenkov, Nikolay G. Leontyev, Mathieu Allix, Aydar Rakhmatullin, I. N. Leontyev","doi":"10.1039/d5nr01487e","DOIUrl":"https://doi.org/10.1039/d5nr01487e","url":null,"abstract":"Pt nanoparticles supported onto carbon black were synthesized via non-isothermal decomposition of platinum acetylacetonate. The Pt loading of Pt/C exhibited variation within the range of 10-25%. Based on the refinement of X-ray patterns by the Rietveld method, it was shown that the average size of Pt nanocrystallites in the range of 1.4-2.0 nm increases with increasing Pt loading. The paper presents a synthesis mechanism describing the observed dependence. In addition, it was found that for the synthesized Pt nanoparticles, the unit cell parameter increases as the average size of Pt nanoparticles decreases. Such an effect has not been observed for platinum nanoparticles before. The reason for the observed increase in the unit cell perimeter of Pt nanoparticles is the dominance of the vacancy mechanism over the surface relaxation mechanism. Finally, the paper presents for the first time a method for refining X-ray patterns of Pt/C materials taking into account the contribution of the carbon support, which allows for an accurate analysis of the treatment of X-ray patterns of Pt/C materials with a low content of the metallic component.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"675 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144669905","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":"Zinc Complex-Based Multifunctional Binders for Lithium Sulfide-Based Lithium-Sulfur Batteries","authors":"Zhe Huang, Yonglin Wang, Yixuan Zhao, Yuning Li","doi":"10.1039/d5nr01950h","DOIUrl":"https://doi.org/10.1039/d5nr01950h","url":null,"abstract":"Lithium sulfide (Li<small>₂</small>S) is a promising cathode material for lithium–sulfur batteries (LSBs) due to its compatibility with lithium-free anodes and commercial electrode processing. However, its high moisture sensitivity and processing difficulties pose challenges, particularly in identifying suitable binders. Here, we report a fluorine-free binder based on a zinc acetate triethanolamine (Zn(OAc)<small>₂</small>·TEA) complex, which exhibits enhanced specific capacity, rate capability, and cycling stability compared to the commonly used PVDF binder. These improvements are attributed to the strong lithium polysulfide (LPS) trapping ability and redox catalytic activity of the Zn(OAc)<small>₂</small>·TEA complex. To improve mechanical robustness and solution stability, polyethylenimine (PEI) was incorporated to form a Zn(OAc)<small>₂</small>·TEA/PEI hybrid binder. Electrochemical testing revealed that Li2S cathodes employing Zn(OAc)<small>₂</small>·TEA/PEI with 10 wt.% PEI delivered superior rate performance, high discharge capacity, and excellent long-term cycling stability. This work presents a promising fluorine-free binder strategy that integrates LPS trapping and redox catalysis, advancing the practical development of high-performance Li2S-based LSBs.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"12 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144670065","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":"Rapid mapping of spinal and supraspinal connectome via self-targeting glucose-based carbon dots","authors":"Yasin B. Seven, Elif Seven, Komal Parikh, Mehmet Aydin, Edward K. Luca, Jayakrishnan Nair, Emel C. Kirbas, Roger M. Leblanc","doi":"10.1039/d5nr02670a","DOIUrl":"https://doi.org/10.1039/d5nr02670a","url":null,"abstract":"The spinal cord is a highly dynamic network playing significant roles in vital functions of the brain. Disorders of the spinal cord, such as spinal cord injury (SCI) and amyotrophic lateral sclerosis (ALS), are associated with neurodegeneration, which often results in morbidity and mortality. The blood-brain barrier (BBB) represents a major challenge for imaging agents and therapeutics, as less than 2% of small-molecule drugs can cross the BBB. Furthermore, spatial spectroscopy studies show highly heterogeneous BBB crossing, with significant binding at the unintended brain regions. Thus, targeting systems that can cross the BBB at the spinal cord and precisely target specific cell types/populations are vitally needed. Carbon dots can be custom-designed to target specific regions in the brain, offering great potential as delivery platforms for imaging and therapeutic approaches. Since neurons are metabolically highly active and rely on glucose, we designed glucose-based carbon dots (GluCDs) with ~4 nm in diameter and glucose-like surface groups. Then, we determined the CNS distribution of GluCDs in three scales: 1. brain regional distribution, 2. cellular tropism (e.g. neurons vs glia), and 3. intracellular localization. We found that GluCDs: 1) cross the BBB at the spinal cord level, localize primarily to the spinal cord, and are quickly transported to higher centers in the brain, revealing supraspinal connectome within 4 hours after systemic delivery (minimally invasive and significantly faster than available technologies); 2) almost exclusively localize to neurons without the need for targeting ligand (neuronal self-targeting), 3) are confined to late endosomal/lysosomal compartment in neurons. We then verified our findings in a cervical spinal cord contusion injury, with GluCDs targeting neurons at the injury epicenter. Therefore, GluCDs can be used as robust imaging agents to take rapid snapshots of the spinal/supraspinal network. GluCD nanoconjugates can open new avenues for targeted imaging of SCI. These findings can be extended to other spinal disorders, such as ALS, spinal muscular atrophy, and spinal stroke.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"76 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144678239","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}