Nanoscale最新文献

{"title":"Phase-tailored CoCrFeNiAl nitride for enhanced electrocatalytic hydrogen evolution via cooling-mediated plasma strategy","authors":"Bo Ouyang, Haonan Qin, Fengkun Li, Chen Li, Zhaofu Du, Yongqi Zhang, Li Yang, Erjun Kan, Kun Xu, Zhishan Mi","doi":"10.1039/d5nr00153f","DOIUrl":"https://doi.org/10.1039/d5nr00153f","url":null,"abstract":"Modulation of the surface structure of high-entropy-alloy-based nitrides (HEANs) is considered essential for improving electrocatalytic H<small>₂</small> production. Compared with thermal nitridation, the plasma technique is a favorable alternative to directly fabricate HEANs, but the excessive surface heating effect during plasma treatment inevitably causes thermally stabilized nitride formation, resulting in deterioration of the highly active structure. To optimize the hydrogen evolution reaction (HER) behavior of HEANs, a facile cooling-mediated plasma strategy is proposed to precisely modulate the HEAN structure (cp-HEAN). The resultant cp-HEAN framework shows a preserved FCC (111) facet and yields an increased amorphous proportion, leading to enhanced HER behavior. In comparison, the normal plasma technique causes FCC lattice distortion with increased precipitation owing to the excessively high surface thermal field (np-HEAN). <em>Operando</em> plasma diagnostics and numerical simulation further confirmed the effect of surface heating on typical plasma parameters and the HEAN framework, indicating that this was the key factor responsible for the high performance of the nitride electrocatalyst.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"125 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713358","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":"In-situ Synthesis of the Bimetallic Chalcogenides with Highly Conducting Carbon Nanotubes for Efficient Symmetric Hybrid Supercapacitor","authors":"Soumyajit Jana, Sampath Karingula, Anjana Sajeevan, V. V. N. Phanikumar, Yugender Goud Kotagiri","doi":"10.1039/d5nr00340g","DOIUrl":"https://doi.org/10.1039/d5nr00340g","url":null,"abstract":"Achieving high energy density and long cycle stability in energy storage devices necessitates excellent electrochemical performance, which often relies on the innovative structural design of the materials under investigation. Therefore, hybrid supercapacitors are crucial in the realm of energy storage devices. The elevated energy density and power density, combined with various energy storage mechanisms, significantly improve electrochemical performance. Here, we developed a highly efficient electrode material, carbon nanotubes-metal chalcogenides (CNT-CuNiSe2), through a simple one-pot reflux method (in situ). The enhanced energy storage is achieved by synergising the CuNiSe2 with the pi-cloud of CNT, which leads to specific capacitance retainability over prolonged cycling stability. The hybrid supercapacitor electrode was formed with conducting carbon cloth (CC) with CNT-CuNiSe2 as a hybrid material, named as CC/CNT-CuNiSe2 material. The fabricated hybrid electrode materials were ideal for energy storage. The CC/CNT-CuNiSe2 has shown excellent energy storage capability by attaining a specific capacitance of 957.06 F/g at 1Ag. Hybrid supercapacitors with high energy and power density were developed using conducting carbon cloth and CNT-CuNiSe2, designated CC/CNT-CuNiSe2//CC/CNT-CuNiSe2. The hybrid capacitor device has demonstrated a capacitance of 265.586 F/g, alongside an energy density of 82.99 Wh/kg at a power density of 1511.35 W/kg, and the charge and discharge at 4A/g, the hybrid capacitor device delivered an impressive capacitance retention of 101.3% over 6000 continuous cyclings.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"3 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713360","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":"Reconfigurable multiwavelength nanophotonic circuit based on low-voltage optically readable engineered resistive switch","authors":"Santosh Kumar, Ashutosh Kumar, Rahul Dev Mishra, Suresh Kumar Pandey, Prem Babu, Mukesh Kumar","doi":"10.1039/d5nr00463b","DOIUrl":"https://doi.org/10.1039/d5nr00463b","url":null,"abstract":"Nanoscale optical functionalities are promising for unconventional computing, including neuromorphic and quantum information processing. Resistive switching devices with optical readability have drawn significant research interest for high-density non-volatile memory and unconventional computing. We propose a multiwavelength nanophotonic circuit consisting of resistive switches based on Ag-SiO2-ITO on silicon rib structure with a capability to electrically remove any wavelength channel(s) at wish. The device features four-layered structure with a SiO2 region positioned between an Ag top electrode and an ITO bottom electrode on p-Si and confines hybrid plasmonic mode within the SiO2 region. The external voltage’s application, conductive filaments forms/rupture in the SiO2 layer, affecting optical absorption through hybrid mode interactions. Experimental results show 27 dB extinction ratio for a 10 μm × 500 nm active device operated at ± 2 volt. Additionally, the circuit achieves multiwavelength functionality using identical sources and 2 × 1 couplers, enhancing reconfigurability. The higher work function of ITO helps reduce energy barrier for ion-migration, overcoming the intrinsic resistance of the SiO2 layer. This engineered nanophotonic circuit, with its high-extinction ratio, excellent retention, lowvoltage operation, and rapid switching speed, is suitable for advanced memory devices, high-speed optical communication, neuromorphic and quantum computation, and programmable photonic circuits.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"1 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143702906","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":"B/N-doped carbon nano-onions as nanocarriers for targeted breast cancer therapy","authors":"Hugh Mohan, Iris Salaroglio, Michal Bartkowski, Kellyjean Courtney, Ilaria Andreana, Tania Limongi, Raul Arenal, Chiara Riganti, Silvia Arpicco, Silvia Giordani","doi":"10.1039/d4nr04990j","DOIUrl":"https://doi.org/10.1039/d4nr04990j","url":null,"abstract":"Cancer is one of the leading causes of death worldwide and represents a significant burden on global health systems. Many existing chemotherapy treatments come with severe side effects, ranging from hair loss to cardiotoxicity and many types of cancer express chemotherapy resistance such as triple-negative breast cancer. This study presents a novel boron/nitrogen-doped carbon nano-onion (BN-CNO) based nanocarrier system that can deliver doxorubicin (DOX) to cancer cells via a pH-dependent drug release mechanism. The nanocarrier formulation consists of a hyaluronic acid/phospholipid conjugate (HA-DMPE) that is non-covalently bound to the BN-CNOs upon which DOX is loaded via π – π stacking interactions. The HA-DMPE/BN-CNO/DOX system enhances the uptake and anticancer effects of DOX in MDA-MB-468 and MDA-MB-231 TNBC cells, whilst reducing the cardiotoxicity of DOX in AC-16 human cardiomyocytes.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"10 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143702947","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":"Nanostructured films from poly(3-hexylthiophene)-graft-poly(ε-caprolactone) as light responsive generators of reactive oxygen species","authors":"Ilaria Abdel Aziz, Elena Gabirondo, Araceli Flores, Pilar Posadas, Haritz Sardon, David Mecerreyes, Miryam Criado-Gonzalez","doi":"10.1039/d5nr00027k","DOIUrl":"https://doi.org/10.1039/d5nr00027k","url":null,"abstract":"The design of smart photoelectrodes is searched to modulate and control the spatio-temporal production of reactive oxygen species (ROS). In this work, we develop photoactive films with tunable nanostructured morphologies to favor ROS production via photostimulation. To that aim, we synthesize graft copolymers, made of poly(3-hexylthiophene) (P3HT) and poly(ε-caprolactone) (PCL), P3HT-g-PCL, which are employed to fabricate compact films by drop casting. The films are further subjected to a thermo-oxidative treatment in the presence of H2O2 at 42 °C. This leads to nanostructured films with a porosity (~ 500 nm diameter and ~ 70 nm height) controlled at specific copolymer compositions, as determined by atomic force microscopy (AFM). The nanostructured P3HT films possess higher storage moduli (E’) than flat P3HT films, as determined by nanoindentation measurements. Finally, the performance of nanostructured P3HT films as photoelectrodes is assessed in a three-electrodes electrochemical cell upon visible-light irradiation (λ = 467 nm), leading to the spatiotemporal production of H2O2 at non-cytotoxic levels for future non-invasive redox medicine applications.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"11 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713365","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":"Start-up Flow of Nanoscale Particles and their Periodic Arrays: Insights from Fundamental Solutions of the Unsteady Stokes Equations","authors":"Christian Aponte-Rivera","doi":"10.1039/d4nr04045g","DOIUrl":"https://doi.org/10.1039/d4nr04045g","url":null,"abstract":"Start-up flows induced by nanoscale particles and their periodic arrays are studied theoretically. At nanoscopic lengths and time scales, the interplay between inertial and viscous forces in the fluid results in time dependent (unsteady) flows important in the study of nanoporous materials and microswimmer locomotion. Here, these flows are studied by developing fundamental solutions, i.e. Green's functions considering point particles, of the unsteady Stokes equations. It is found that the approach to steady state is characterized by a viscous penetration depth <em>l=(4 ν t)<small>^1/2</small></em>, where <em>ν</em> is the kinematic viscosity and <em>t</em> time. For an isolated particles, fluid inertia leads to vortex flows with a rotation axis roughly a distance <em>l</em> from the particle. As time increases, the vortex distance to the particle increases diffusively as <em>l<small>²</small> ∽ 4ν t</em>, with the limit <em>l→∞ </em> corresponding to the steady state limit. In a periodic array, inertia also leads to vortex flows. Furthermore, the presence of the other array particles results in an unsteady back flow that develops simultaneously to the local flow around a test particle. The back flow develops with a characteristic time scale proportional to <em>L<small>²</small>/ν</em>, where <em>L</em> is the size of the unit cell.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"99 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143702907","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":"Synthesis and Electronic Structure of Atomically Thin 2H-MoTe2","authors":"Wenjuan Zhao, Xieyu Zhou, Dayu Yan, Yuan Huang, Cong Li, Qiang Gao, Paolo Moras, Polina M. Sheverdyaeva, Hongtao Rong, Yongqing Cai, Eike F. Schwier, Xixia Zhang, Cheng Shen, Yang Wang, Yu Xu, Wei Ji, Chen Liu, Youguo Shi, Lin Zhao, Lihong Bao, Qingyan Wang, Kenya Shimada, Xutang Tao, Guangyu Zhang, Hong-Jun Gao, Zuyan Xu, Xingjiang Zhou, Guodong Liu","doi":"10.1039/d4nr05191b","DOIUrl":"https://doi.org/10.1039/d4nr05191b","url":null,"abstract":"An in-depth understanding of the electronic structure of 2H-MoTe2 at the atomic layer limit is a crucial step towards its exploitation in nanoscale devices. Here, we show that millimeter-sized monolayer (ML) MoTe2 samples, as well as smaller sized bilayer (BL) samples, can be obtained using the mechanical exfoliation technique. The electronic structure of these materials is investigated by Angle-Resolved Photoemission Spectroscopy (ARPES) for the first time and Density Functional Theory (DFT) calculations. The comparison between experiments and theory allows us to describe ML MoTe2 as a semiconductor with direct gap at K point. This scenario is reinforced by the experimental observation of the conduction band minimum at K in Rb-doped ML MoTe2 , resulting in a gap of at least 0.924 eV. In the BL MoTe2 system the maxima of the bands at Γ and K display very similar energies, thus leaving the door open to a direct gap scenario, in analogy to WSe2 . The monotonic increase in the separation between spin-split bands at K while moving from ML to BL and bulk-like MoTe2 is attributed to interlayer coupling. Our findings can be considered as a reference to understand Quantum Anomalous and Fractional Quantum Anomalous Hall Effects recently discovered in ML and BL MoTe2 based moiré heterostructures.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"57 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143702946","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":"Correction: Nano-spherical tip-based smoothing with minimal damage for 2D van der Waals heterostructures","authors":"Xiaolei Ding, Baoshi Qiao, Paul C. Uzoma, Muhammad Abid Anwar, Yuxuan Chen, Lansheng Zhang, Yang Xu, Huan Hu","doi":"10.1039/d5nr90050f","DOIUrl":"https://doi.org/10.1039/d5nr90050f","url":null,"abstract":"Correction for ‘Nano-spherical tip-based smoothing with minimal damage for 2D van der Waals heterostructures’ by Xiaolei Ding <em>et al.</em>, <em>Nanoscale</em>, 2025, <strong>17</strong>, 3095–3104, https://doi.org/10.1039/D4NR03583F.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"24 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143702945","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":"CT imaging of and therapy for inflammatory bowel disease via low molecular weight dextran coated ceria nanoparticles","authors":"Derick N. Rosario-Berríos, Amanda Pang, Katherine Mossburg, Johoon Kim, Victor Vazquez Marrero, Seokyoung Yoon, Mahima Gupta, Olivia C Lenz, Leening P. Liu, Andrea C Kian, Kálery La Luz Rivera, Sunny H. Shin, Peter B. Noël, Elizabeth M. Lennon, David P Cormode","doi":"10.1039/d4nr04994b","DOIUrl":"https://doi.org/10.1039/d4nr04994b","url":null,"abstract":"Inflammatory bowel disease (IBD) affects approximately 3.1 million individuals in the U.S., causing deleterious symptoms such as bloody diarrhea and leading to an increased risk of colorectal cancer. Effective imaging is crucial for diagnosing and managing IBD, as it allows for accurate assessment of disease extent and severity and guides treatment decisions, and monitors therapeutic responses. Computed tomography (CT) with contrast agents is the gold standard for imaging the gastrointestinal tract (GIT). However, current agents are less effective in obese patients and lack specificity for inflamed regions in IBD. Moreover, IBD treatments often have limited efficacy and do not address the role of oxidative stress in IBD progression. This study explores dextran-coated cerium oxide nanoparticles (Dex-CeNP) as a CT contrast agent and therapeutic for IBD, leveraging cerium’s superior K-edge energy profile, inflammation-targeting dextran coating, and cerium oxide’s antioxidant properties. We herein sought to explore the effect of the molecular weight of the dextran coating and therefore synthesized Dex-CeNP formulations using 5, 10, 25, and 40 kDa dextran. In vitro assays showed these formulations to be safe and demonstrated that 5 kDa Dex-CeNP had the highest catalytic activity, which translated into improved suppression of inflammation. This formulation was therefore selected for in vivo use. In vivo CT imaging of mice subjected to dextran sodium sulfate (DSS) colitis showed that Dex-CeNP provided better contrast in the GIT of mice with colitis compared to iopamidol (ISO), with pronounced attenuation in the large intestine and disease- specific retention at 24 hr. Dex-CeNP significantly decreased Disease Activity Index (DAI) scores compared with a currently used drug, indicating that it is effective treatment for colitis. Additionally, Dex-CeNP-treated mice had reduced colon contraction and diminished gastrointestinal bleeding, while being safe and well-excreted. In summary, Dex-CeNP has significant promise as a dual-purpose agent for CT imaging and treatment of IBD.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"23 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713363","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":"Circular Dichroism Measurement of Single Anisotropic Chiral Nanostructure Using Scanning Circular Dichroism Microscopy","authors":"Jiaxin Du, Xujin Qin, Xinyu Li, Hongyan Shi, Yueling Zhang, Pengfei Duan, Bo Gao","doi":"10.1039/d4nr04868g","DOIUrl":"https://doi.org/10.1039/d4nr04868g","url":null,"abstract":"Circular dichroism (CD) spectroscopy is widely used to study the chiroptical properties of chiral materials, including films, solutions, and isotropic materials. However, measuring the CD signal of single anisotropic chiral nanostructures is challenging due to the presence of “artifact” signals, such as linear dichroism (LD) and linear birefringence (LB). In this study, we employed scanning circular dichroism microscopy (SCDM) to extract the intrinsic CD signal of the single DBD/LBL self-assembled chiral supramolecule. Using the Stokes–Mueller formalism, we analyzed the SCDM signal, which exhibited a sinusoidal dependence on the polarization angles of the laser beam. This approach enabled the determination of both the orientation and the intrinsic CD. The intrinsic CD of the single DBD self-assembled chiral supramolecule was 9.9 mdeg, while that of the single LBL self-assembled chiral supramolecule was –9.3 mdeg. The SCDM provides new method in measuring CD at the nanoscale, paving the way for future advancements in optoelectronic applications and introducing an approach for studying chiral nanomaterials.","PeriodicalId":92,"journal":{"name":"Nanoscale","volume":"21 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713362","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}