Nanoscale最新文献_第3页

Gold-Palladium Nanoalloys Catalysts Prepared by Solid Mortar Grinding for Homocoupling of Phenylboronic Acid 固体砂浆研磨制备苯硼酸均偶联金-钯纳米合金催化剂

IF 6.7 3区材料科学

Nanoscale Pub Date : 2026-11-05 DOI: 10.1039/d5nr05270j

Nazer Nafeesa Thaslim,Paul Reddy K,Teesta Mukhopadhyay,Kazu Okumura,Ponnusamy Shanmugam,Arumugam Murugadoss

{"title":"Gold-Palladium Nanoalloys Catalysts Prepared by Solid Mortar Grinding for Homocoupling of Phenylboronic Acid","authors":"Nazer Nafeesa Thaslim,Paul Reddy K,Teesta Mukhopadhyay,Kazu Okumura,Ponnusamy Shanmugam,Arumugam Murugadoss","doi":"10.1039/d5nr05270j","DOIUrl":"https://doi.org/10.1039/d5nr05270j","url":null,"abstract":"A manual solid grinding method for efficiently synthesizing gram-scale solid chitosan-supported AuPd alloy NPs catalyst is reported. A series of AuPd NPs with varying compositional structures, featuring high loading and more excellent uniformity, can be deposited on chitosan support by manually grinding a mixture of chitosan, Au and Pd metal precursors, and NaBH4 using a mortar and pestle. At lower Pd content, isolated Pd atoms are dispersed across multiple gold islands. At the same time, uniform AuPd alloy NPs are formed at higher Pd contents AuPd/Chit catalysts, as confirmed by XPS, HRTEM, HAADF-STEM-EDS mapping and EXAFS analyzes. The as-prepared AuPd/Chit demonstrated significant synergistic catalytic activity and selectivity in the homocoupling of the phenylboronic acid reaction, even in the presence of considerable quantities of inorganic base. Additionally, AuPd/Chit catalysts prepared at the gram scale showed identical catalytic structure, activity, and selectivity to AuPd/Chit achieved at lesser concentrations, demonstrating that manual solid grinding processes have no magnification effect (up to 2 gram). The current approach, characterized by its ease and simplicity, is anticipated to significantly advance the gram-scale synthesis of renewable biopolymer supported bimetallic NPs catalysts, thereby promoting the sustainable development of greener heterogeneous catalytic systems.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"1 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149359784","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}

引用次数: 0

Differential effects of ions and crowding agents on DNA plectoneme dynamics revealed by single-molecule visualization 离子和拥挤剂对DNA微粒素动力学的不同影响

IF 6.7 3区材料科学

Nanoscale Pub Date : 2026-11-04 DOI: 10.1039/d6nr02520j

Xianqi Ye,Yuanhao Gong,Jialun Liang,Biao Wan,Chuang Tan,Jie Ma

{"title":"Differential effects of ions and crowding agents on DNA plectoneme dynamics revealed by single-molecule visualization","authors":"Xianqi Ye,Yuanhao Gong,Jialun Liang,Biao Wan,Chuang Tan,Jie Ma","doi":"10.1039/d6nr02520j","DOIUrl":"https://doi.org/10.1039/d6nr02520j","url":null,"abstract":"DNA plectonemes are dynamic supercoiled structures that play essential roles in transcription, replication, and chromosome organization. However, the intracellular environment is highly viscous and crowded, and enriched with multivalent ions, rendering the influence of these factors on DNA plectoneme dynamics unclear. Here, using single-molecule visualization, we systematically investigate the effects of ions with different valences (Na⁺, Mg²⁺, and [Co(NH₃)₆]³⁺) and crowding agents (glycerol and PEG 8000) on positvie DNA plectoneme dynamics. Our results show that both ions and crowding agents significantly slow down plectoneme diffusion, with multivalent ions exerting a much stronger effect than monovalent ions, and PEG 8000 being more effective than glycerol in reducing the diffusion constant. Furthermore, unlike Na⁺ and Mg²⁺, both [Co(NH₃)₆]³⁺ and crowding agents strongly suppress DNA intrinsic fluctuations. By comparing our experimental results with physiologically relevant multivalent ion concentrations and cellular viscosity, we find that viscosity and crowding may impose major physical constraint on plectoneme mobility in vivo, leaving large plectonemes relatively immobile. These findings highlight the critical role of the previously discovered hopping mechanism in enabling rapid plectoneme propagation along DNA within cellular environments.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"255 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149358921","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}

引用次数: 0

Polyethyleneimine (PEI) molecular weight alters the photophysical and FRET properties of water dispersible NaYF:Yb,Er upconversion nanoparticles 聚乙烯亚胺（PEI）的分子量改变了水分散纳米粒子的光物理和FRET性质

IF 6.7 3区材料科学

Nanoscale Pub Date : 2026-11-04 DOI: 10.1039/d6nr02308h

Rebecca McGonigle,Christian Homann,Ciera Connelly,Marta Gajewska,Niko Hildebrandt,Robert Pal,Ute Resch-Genger,Shiao Y Chow,Lewis Edward MacKenzie

{"title":"Polyethyleneimine (PEI) molecular weight alters the photophysical and FRET properties of water dispersible NaYF:Yb,Er upconversion nanoparticles","authors":"Rebecca McGonigle,Christian Homann,Ciera Connelly,Marta Gajewska,Niko Hildebrandt,Robert Pal,Ute Resch-Genger,Shiao Y Chow,Lewis Edward MacKenzie","doi":"10.1039/d6nr02308h","DOIUrl":"https://doi.org/10.1039/d6nr02308h","url":null,"abstract":"Upconversion nanoparticles (UCNPs) are optically active materials with near-infrared excitation and tuneable anti-Stokes emission, typically resulting in visible emission. A route to routine and reliable synthesis of waterdispersible UCNPs for biomedical imaging applications is the polyethyleneimine (PEI)-assisted solvothermal autoclave synthesis; however, the properties of the resulting UCNPs remain understudied. Herein, we report how PEI molecular weight alters properties of core-only, red-emitting, water-dispersible PEI-UCNPs. In terms of brightness, 1.2 kDa PEI-UCNPs exhibited 5 times more intense upconversion luminescence (UCL) than 25 kDa PEI-UCNPs and a 29% longer UCL lifetime (LT) for the red emission band (~640-690 nm, 4 F9/2 → 4 I15/2 Er 3+ transition) in DI H2O. Dispersal in D2O increased emission across wavebands, with green emission ( 2 H11/2, 4 S3/2 → 4 I15/2 Er 3+ transition) increasing by 248 -365% whereas red emission only increased between 38-64%. From our results, we infer that PEI may quench the UCL via high-energy NH vibrations. We also examined Förster Resonance Energy Transfer (FRET) between PEI-UCNPs and an electrostatically adsorbed fluorescent model dye, AlexaFluor647 ® (AF647). 25 kDa PEI-UCNPs achieved highest LT estimated FRET efficiencies of ~11% in H2O and 16% in D2O, respectively. These findings highlight that polymer MW should be considered when optimising UCNP synthesis.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"15 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149358833","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}

引用次数: 0

Rational design of solid-state surfactants with anionic headgroups for non-layered nanosheet synthesis 非层状纳米片合成中阴离子头基固态表面活性剂的合理设计

IF 6.7 3区材料科学

Nanoscale Pub Date : 2026-11-04 DOI: 10.1039/d6nr03180c

Kentaro Ito,Eisuke Yamamoto,Makoto Kobayashi,Minoru Osada

{"title":"Rational design of solid-state surfactants with anionic headgroups for non-layered nanosheet synthesis","authors":"Kentaro Ito,Eisuke Yamamoto,Makoto Kobayashi,Minoru Osada","doi":"10.1039/d6nr03180c","DOIUrl":"https://doi.org/10.1039/d6nr03180c","url":null,"abstract":"Precise compositional control is essential for tuning the properties of two-dimensional nanosheets. The solid-state surfactant templating method enables the synthesis of compositionally controlled non-layered oxide nanosheets through the rational design of precursor solid-state surfactants. However, previous studies have been limited to sulfate-based surfactants, leaving the compositional design principles for surfactants with diverse headgroups unclear. Moreover, whether these surfactants can be applied as precursors for nanosheet synthesis remains unexplored. Here, we investigate solid-state surfactants with sulfate, sulfonate, phosphonate, and carboxylate headgroups using Ce and Gd as countercations. The amount of incorporated Gd followed the order phosphonate-based > carboxylate-based > sulfate-based > sulfonate-based solid-state surfactants. The metal composition is likely governed by the balance between headgroup-metal interactions and headgroup-headgroup repulsion. Humid ammonia vapor treatment followed by formamide immersion produced nanosheets from sulfonate-based solid-state surfactants, but not from phosphonate-based or carboxylate-based surfactants. This result suggests that weakly coordinating headgroups are more suitable for the solid-state surfactant templating method. The reduction in the Gd fraction from the precursor surfactants to the resulting nanosheets was comparable between the sulfate-based and sulfonate-based systems. These results provide a framework for designing metal compositions in solid-state surfactants with diverse headgroups.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"44 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149358922","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}

引用次数: 0

Sn-Modified RuOx for Selective Active Chlorine Electrosynthesis in Neutral Saline Media sn修饰的RuOx在中性盐介质中选择性电合成活性氯

IF 6.7 3区材料科学

Nanoscale Pub Date : 2026-11-04 DOI: 10.1039/d6nr03186b

Mengfan Bi,Jian Kang,Zhixian Mao,Zenglong Wu,Jifang Zhang,Tengxiu Tu,Yongying Tian,Shan Chen,Junxian Liu,Huajie Yin

引用次数: 0

Dimensional crossover of thermal transport in nanoconfined liquids driven by the interplay of quasi-one-dimensional structure and wall dissipation. 准一维结构与壁面耗散相互作用下纳米流体热输运的尺度交叉。

IF 5.2 3区材料科学

Nanoscale Pub Date : 2026-11-04 DOI: 10.1039/d6nr02737g

Kenta Hisamoto, Yusei Kobayashi, Takahiro Ikeda, Eiji Yamamoto, Masashi Yamakawa

引用次数: 0

Interfaces between Cobalt Phthalocyanines and MoSe2: Conditions for charge transfer and the Nature of Gap States 酞菁钴与MoSe2之间的界面：电荷转移条件和间隙态的性质

IF 6.7 3区材料科学

Nanoscale Pub Date : 2026-11-04 DOI: 10.1039/d6nr03377f

Carolin Schüle,Eric Juriatti,Peter Nagel,Tim Parker,Michael Merz,Dai Zhang,Alfred J. Meixner,Thomas Chassé,Stefan Schuppler,Marcus Scheele,Heiko Peisert

{"title":"Interfaces between Cobalt Phthalocyanines and MoSe2: Conditions for charge transfer and the Nature of Gap States","authors":"Carolin Schüle,Eric Juriatti,Peter Nagel,Tim Parker,Michael Merz,Dai Zhang,Alfred J. Meixner,Thomas Chassé,Stefan Schuppler,Marcus Scheele,Heiko Peisert","doi":"10.1039/d6nr03377f","DOIUrl":"https://doi.org/10.1039/d6nr03377f","url":null,"abstract":"The recently increasing research efforts devoted to layered transition metal dichalcogenides (TMDCs) derive from their novel electronic properties, which might be further tuned by the adsorption of molecules. However, the nature of interactions is often not fully understood, especially for comparably weakly interacting molecules, such as transition metal phthalocyanines (TMPcs). We studied interface properties between cobalt phthalocyanine (CoPc) or perfluorinated CoPcF16 and molybdenum diselenide (MoSe2) using photoelectron spectroscopy (PES), angle resolved photoelectron spectroscopy (ARPES), X-ray absorption spectroscopy (XAS) and photoluminescence spectroscopy. The interaction between MoSe2 and cobalt phthalocyanines crucially depends on both the ionization potential of the molecule and the doping level of the substrate. Only for CoPcF16 interfaces, a redistribution of electrons of the Co ion is observed, which can be associated with interfacial charge transfer. These effects are significantly more pronounced, if the MoSe2 substrate is nominally n-doped. The results are discussed in the context of integer and fractional charge transfer, the latter associated with the formation of states within the band gap.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"7 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149358854","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}

引用次数: 0

Synergistic Microstructural Optimization of Nickel−Iron Dual Sites in NiFealloy/NiFe2O4 by La Doping and V Vacancy for Boosting Oxygen Evolution Reaction La掺杂和V空位协同优化NiFealloy/NiFe2O4中镍-铁双位点的微观结构促进析氧反应

IF 6.7 3区材料科学

Nanoscale Pub Date : 2026-11-04 DOI: 10.1039/d6nr04092f

Issa Salim,Gouda Helal,Wei Zuo,Abdelrazek M. Askar,Zhi Li,Xinyi Chen,Shiqi Mei,Gongzhen Cheng,Pingping Zhao

{"title":"Synergistic Microstructural Optimization of Nickel−Iron Dual Sites in NiFealloy/NiFe2O4 by La Doping and V Vacancy for Boosting Oxygen Evolution Reaction","authors":"Issa Salim,Gouda Helal,Wei Zuo,Abdelrazek M. Askar,Zhi Li,Xinyi Chen,Shiqi Mei,Gongzhen Cheng,Pingping Zhao","doi":"10.1039/d6nr04092f","DOIUrl":"https://doi.org/10.1039/d6nr04092f","url":null,"abstract":"The electrochemical surface reconstruction of transition-metal pre-catalysts offers a promising route to forms metal oxyhydroxide active layers during the oxygen evolution reaction (OER), yet the role of dual cationic dopants in this process remains poorly understood. Here, we report an electrochemically synthesized amorphous NiFeOOH layer on a VLa-NiFealloy/NiFe2O4 heterostructure pre-catalyst for the OER. The pre-catalyst is prepared via atmospheric reduction with sodium formate under nitrogen, followed by annealing, enabling controlled incorporation of V and La. The phase-selective doping, La preferentially saturating the oxide lattice and V selectively contracting the alloy phase creates a maximally strained heterointerface with abundant defects. The optimized VLa-NiFealloy/NiFe2O4 catalyst achieves an exceptionally low overpotential of 265 mV at 10 mA cm⁻² and sustains stability over 100 h at 100 mA cm⁻² in 1 M KOH. Comprehensive in situ Raman spectroscopy, XPS, and HRTEM analyses reveal a dramatic electrochemical surface reconstruction pathway by vanadium leaching and lattice oxygen activation to create FeNiOOH active sites. DFT calculations confirm that co-doping lowers OER intermediate energy barriers of the RDS from 2.15 eV to 1.60 eV by optimizing the d-band center of Ni sites. This work provides a fundamental insight into unexplored V and La dual-dopant-triggered surface reconstruction and offers a viable strategy for designing high-performance OER catalysts.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"49 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149358853","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}

引用次数: 0

Multi-Objective Machine Learning Navigates the Efficiency–Stability Trade-Off in Blue Perovskite Light-Emitting Diodes 多目标机器学习导航蓝钙钛矿发光二极管的效率-稳定性权衡

IF 6.7 3区材料科学

Nanoscale Pub Date : 2026-11-03 DOI: 10.1039/d6nr02855a

Fawad Ali,Shuaiqi He,Peichao Zhu,Nabeel Israr,Puyang Wu,Jiaxin Liang,Jiacheng Lin,hua dong,Jun Xi,Zhaoxin Wu,Fang Yuan

{"title":"Multi-Objective Machine Learning Navigates the Efficiency–Stability Trade-Off in Blue Perovskite Light-Emitting Diodes","authors":"Fawad Ali,Shuaiqi He,Peichao Zhu,Nabeel Israr,Puyang Wu,Jiaxin Liang,Jiacheng Lin,hua dong,Jun Xi,Zhaoxin Wu,Fang Yuan","doi":"10.1039/d6nr02855a","DOIUrl":"https://doi.org/10.1039/d6nr02855a","url":null,"abstract":"Blue perovskite light-emitting diodes (PeLEDs) are widely considered to suffer from an efficiency-stability trade‑off that impedes their commercialization for next‑generation displays. To examine this trade‑off quantitatively, we compiled a dataset of 421 blue PeLED devices from 256 publications (2016-2026) and combined multi-objective analysis with machine learning (ML). Across the 82 devices that report both metrics, external quantum efficiency (EQE) and operational lifetime (T50) are positively correlated (Spearman ρ = 0.47, p = 7.2 × 10-6); the trade‑off appears only at the Pareto front of the best devices. A random-forest model predicts EQE with R2 = 0.50 on a held-out test set and R2 = 0.46 ± 0.09 in repeated 5-fold cross-validation, and the accuracy is largely retained when entire publications are held out (R2 = 0.41-00). Photoluminescence quantum yield (PLQY) is predicted moderately (R2 = 0.36 on the test set), whereas T50 cannot be predicted from the reported features (test R2 = 0.01). Bootstrapped SHapley Additive exPlanations (SHAP) analysis shows that publication year, emission wavelength and device context account for 84% of the EQE attribution and ligand descriptors for 6%. Among devices with a named ligand, hydrogen-bond-acceptor count and sulfonate content correlate positively with EQE (ρ = 0.33-0.36), but these trends are preliminary. A comparison of predicted and reported EQE for PEA and fluorinated PEA spacers, together with a temporal test on 2025–2026 papers, shows that the model captures broad trends but under-predicts the newest high-efficiency devices.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"37 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149305250","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}

引用次数: 0

Temperature-Driven Morphology Regulation of δ-MnO2 Nanofibers and Their Electrochemical Performance in Aqueous Zinc-Ion Hybrid Capacitors δ-MnO2纳米纤维的温度驱动形态调控及其在锌离子混合电容器中的电化学性能

IF 6.7 3区材料科学

Nanoscale Pub Date : 2026-11-03 DOI: 10.1039/d6nr02823c

Likang Wang,Shaodu Wei,Dan Yang,Bingqian Li,Ting Xiong

{"title":"Temperature-Driven Morphology Regulation of δ-MnO2 Nanofibers and Their Electrochemical Performance in Aqueous Zinc-Ion Hybrid Capacitors","authors":"Likang Wang,Shaodu Wei,Dan Yang,Bingqian Li,Ting Xiong","doi":"10.1039/d6nr02823c","DOIUrl":"https://doi.org/10.1039/d6nr02823c","url":null,"abstract":"Aqueous zinc-ion hybrid capacitors (AZICs) possess outstanding advantages including inherent high safety, low manufacturing cost, and balanced energy-power performance. However, their practical application is frequently hindered by the sluggish electrochemical kinetics of cathode materials. In this work, we develop a facile hydrothermal approach to precisely manipulate the morphology of MnO2 via reaction temperature adjustment, successfully synthesizing uniform one-dimensional δ-MnO2 nanofibers. The obtained material combines two beneficial characteristics synergistically: the layered crystal structure of δ-MnO2 enables reversible Zn2+ intercalation/deintercalation, while the fibrous architecture prevents face-to-face stacking of nanosheets, reduces ion diffusion distances, forms continuous conductive pathways, and exposes a large number of electrochemically active sites. When employed as the cathode paired with an activated carbon anode, the fabricated AZIC exhibits a specific capacitance of 139 F g-1 at 0.125 A g-1, maintains approximately 80% of its initial capacitance after 2000 charge-discharge cycles with 100% Coulombic efficiency, and achieves a maximum energy density of 55.7 Wh kg-1. This study presents a straightforward morphology-regulation strategy for constructing high-performance cathode materials for AZICs.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"1 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149305249","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}

引用次数: 0