Nanotechnology最新文献

{"title":"Impact of various reaction conditions of solvothermal synthesis on electrochemical properties of Ni-MOF materials.","authors":"Lijun Xu, Zhongyi Zhang, Yan Lu, Qing Huang, Wenyi Yuan","doi":"10.1088/1361-6528/ae0595","DOIUrl":"10.1088/1361-6528/ae0595","url":null,"abstract":"<p><p>A series of Ni-MOF materials were synthesized by a one-step solvothermal method under different reaction conditions, including metal source, organic ligand, reaction time and reaction temperature. The results demonstrated that the Ni-MOFs synthesized using Ni(NO₃)₂·6H₂O as the metal source had higher crystallinity and a more uniform crystalline structure than those with NiCl₂·6H₂O. Different organic ligands led to the formation of Ni-MOFs in various morphologies. With the increase of reaction time, the crystal particles gradually became smaller, and the hexagonal lamellar block gradually transformed into spherical block crystals. Besides, the capacity retention of the material varied with different reaction temperatures. The highest specific capacitance reached 1996 F·g^-1at a current density of 1 A·g^-1when the temperature was 140 °C. After 3,000 cycles at 10 mA, the material demonstrated a capacity retention of 1 A·g^-1with a capacity retention rate of 74.82%. The synthesis method and material structure of Ni-MOFs could be improved to facilitate their widespread application in the field of supercapacitors, thereby accelerating the advancement of energy storage technology.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145033808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphology-engineered copper-based MOF-199@MWCNTs hybrids for enhanced microwave absorption.","authors":"Wenbo Li, Xuyang Jiang, Xia Wang, Zhuojiao Liu, Xin Wang, Wen Zheng, Chenhui Yang, Aibo Zhang","doi":"10.1088/1361-6528/ae07e9","DOIUrl":"10.1088/1361-6528/ae07e9","url":null,"abstract":"<p><p>Metal-organic frameworks (MOFs) of MOF-199 with three distinct morphologies-cubic (hexahedral)-A, octahedral-B and tetradecahedral-C-were prepared by solvothermal method via adjusting the amount of coordination modulator of lauric acid. Meanwhile, absorbing hybrids of MOF-199@multi-walled carbon nanotubes (MWCNTs) with a three-dimensional structure were constructed via<i>π</i>-<i>π</i>stacking interactions between benzene ring<i>π</i>-electrons in the organic ligand of MOF-199 and<i>π</i>electronic of MWCNTs. Scanning electron microscopy images demonstrated that MOFs particles with three distinct morphologies were obtained, with an average particle size of approximately 2<i>μ</i>m. The aim of this study is to investigate the influence of MOF morphology on the absorption performance. Due to the increased number of facets and relatively abundant heterogeneous interfaces of tetradecahedral MOF-199-C, the RL_minof MOF-199-C@MWCNTs hybrids reach up to -48.16 dB, which is higher than that of cubic MOF-199-A@MWCNTs (-23.21 dB) hybrids and octahedral MOF-199-B@MWCNTs (-45.77 dB) hybrids. The results indicated that increasing the number of facets promotes multiple scattering and internal reflection of electromagnetic waves, which increases the heterogeneous interfaces and promotes absorption performance.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145081221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanoscale plastic pollution: sources, identification and potential mitigation.","authors":"Gibson Boakye, Emma Trotta, Nuwan Ambagahawatta, Anusha Venkataraman, Naowarat Cheeptham, Chris Papadopoulos","doi":"10.1088/1361-6528/ae0c1b","DOIUrl":"https://doi.org/10.1088/1361-6528/ae0c1b","url":null,"abstract":"<p><p>The amount of global plastic waste has been increasing steadily since synthetic polymers were introduced over a century ago and plastic products have become ubiquitous in modern societies. A significant portion of this waste can accumulate and persist for many decades as plastic particulate pollution that can interact with natural ecosystems, and in urban and rural environments. The size of these plastic particles can vary widely, from millimetres to micrometre and nanometre scales, depending on several factors including material properties, production, application, age and environmental exposure. Importantly, the properties and potential impact of plastic particle pollution can depend strongly on their size, particularly for nanoscale dimensions, or nanoplastics. Nanoplastics, and slightly larger microplastics, are more difficult to detect, can spread more easily, and potentially interact more directly with biological organisms and ecosystems. This review provides a detailed synopsis of nanoscale plastic pollution. After an overview of plastic particle pollution in general, the sources and impact of nanoplastics, both environmental and biological are discussed. Methods for identifying and characterising nanoplastics via microscopy, spectroscopy, spectrometry and related techniques are then covered along with practical challenges that can often hinder detection. Potential solutions for mitigating nanoplastics waste and pollution, both at the source and after production, and lastly, future directions and outlook round out the review.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Symmetric Thickness Modulation in MoS2/WSe2 Heterostructures: Tuning Mobility and PVCR for Next-Generation Electronics.","authors":"Mohammed Ismail Beddiar, Xiaoyu He, Abdul Sattar, Li Shiguo, Cong Wang, Jingcheng Jin","doi":"10.1088/1361-6528/ae0c1c","DOIUrl":"https://doi.org/10.1088/1361-6528/ae0c1c","url":null,"abstract":"<p><p>Two-dimensional (2D) transition metal dichalcogenide (TMD) heterostructures, such as MoS2/WSe2, offer unique electronic properties and atomic-scale thickness, making them promising candidates for next-generation electronic devices. However, optimizing their performance requires a deeper understanding of how layer thickness influences key electrical parameters. This study systematically examines how symmetric layer-number variations influence key electrical properties, including mobility, threshold voltage (Vth), and peak-to-valley current ratio (PVCR), in MoS2/WSe2 field-effect transistors (FETs) across a broad thickness range (3/3 to 137/137 layers).The 12/12-layer configuration achieves a maximum PVCR of 105, attributed to efficient band-to-band tunneling (BTBT), while the 19/19-layer configuration demonstrates peak mobility of 25.41 cm2/V·s, highlighting the role of interlayer coupling in enhancing device performance. The 12 to 40-layer range emerges as a versatile thickness range for balancing these properties, suitable for various device applications. The study also investigates pristine MoS2 and WSe2 layers, revealing their individual optimal thicknesses, with peak mobilities of 59.01 cm2/V·s at 11 layers and 96.3 cm2/V·s at 12 layers, respectively. A 24-hour acetone exposure test on single-layer WSe2 FETs underscores the environmental vulnerability of ultra-thin configurations, revealing extended depletion voltage ranges (up to 80 V) and insulator-like behavior. These findings demonstrate the critical importance of symmetric thickness control in enhancing the multifunctionality and robustness of MoS2/WSe2 heterostructures. They pave the way for scalable, high-performance electronic and optoelectronic applications, including multi-functional transistors and environmentally resilient devices.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145176694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"All-solid-state mechanochemical synthesis of Cu²⁺-doped MIL-53(Fe) for high-efficient nitrate electroreduction to ammonia.","authors":"Wang Zhang, Tianci Feng, Shiqi Li, Xin Zhang, Tang Wang, Yu Zhou, Long Lin, Lin Qiao, Xiao Han, Rui Li","doi":"10.1088/1361-6528/ae0749","DOIUrl":"10.1088/1361-6528/ae0749","url":null,"abstract":"<p><p>Electrocatalytic nitrate reduction has emerged as a promising strategy for sustainable ammonia synthesis, providing the dual advantage of mitigating nitrate pollution and producing value-added green ammonia. However, enhancing intrinsic catalytic activity and catalytic site accessibility remains a challenge for further improving the performance of nitrate electroreduction to ammonia. Herein, a series of gradient Cu²⁺-doped MIL-53(Fe) electrocatalysts were synthesized via an all-solid-state mechanochemical synthesis method for electrocatalytic nitrate-to-ammonia conversion. MIL-53(Fe)-CuB exhibits a large NH₃production rate of 2391 ± 327<i>μ</i>g h^-1mg_cat^-1at -0.6 V vs RHE and a high Faradaic efficiency of 82.1% ± 1.2% at -0.3 V vs RHE in 1 M KOH with 100 ppm NO₃^-, demonstrating an excellent electrocatalytic performance for nitrate reduction. This work reveals that Cu²⁺-doping in mechanochemically synthesized Fe-metal-organic frameworks (MOFs) boosts nitrate reduction efficiency and selectivity, while broadening research on foreign metal ion anchoring in MOF electrocatalysis.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145075696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electric field-tunable electronic properties of GaTe/GaSe van der Waals heterobilayers: a first-principles study.","authors":"Hsin-Yi Liu, Jhao-Ying Wu","doi":"10.1088/1361-6528/ae0748","DOIUrl":"https://doi.org/10.1088/1361-6528/ae0748","url":null,"abstract":"<p><p>We conduct a comprehensive first-principles study on the electronic properties of GaTe/GaSe van der Waals heterobilayers, focusing on the effects of stacking order and a perpendicular electric field. While the individual monolayers exhibit indirect band gaps, the heterobilayers develop a direct band gap at the Brillouin zone center due to interlayer orbital hybridization. Projected density of states analyses reveal that the valence and conduction band edges originate from orbitals localized in different layers, indicating a type-II band alignment favorable for charge separation. Application of a perpendicular electric field induces a tunable band gap reduction and reinforces the type-II character through asymmetric charge redistribution and enhanced layer-specific localization. Notably, the system exhibits a strong polarity-dependent response under positive and negative fields, arising from the intrinsic chemical asymmetry between GaTe and GaSe. This electric-field-driven modulation offers a viable strategy for engineering the electronic structure of Ga-based heterostructures toward high-performance nanoelectronic and optoelectronic applications.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":"36 39","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145138195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electronic properties of multilayered Lieb, transition, and Kagome lattices.","authors":"T F O Lara, E B Barros, W P Lima, J P G Nascimento, J Milton Pereira, T A S Pereira, D R da Costa","doi":"10.1088/1361-6528/ae0747","DOIUrl":"10.1088/1361-6528/ae0747","url":null,"abstract":"<p><p>Based on the interconvertibility feature shared between monolayer Lieb and Kagome lattices, which allows mapping transition lattice's stages between these two limits (π/2⩽θ⩽2π/3), in this work we extend the recently proposed one-control (<i>θ</i>) parameter tight-binding model for the case of a multilayer Lieb-Kagome system, by considering the two most-common stacks: AA and AB (Bernal). We systematically study the band transformations between the two lattices by adjusting the interlayer hopping and distance, with or without considering the influence of the nearest interlayer neighbors, for different numbers of stacked layers, and under the application of an external perpendicular electric field. The energetic changes are understood from the perspective of the layer dependence of the pseudospin components and the total probability density distributions. The present framework provides an appropriate and straightforward theoretical approach to continuously investigate the evolution of electronic properties in the multilayer Lieb-Kagome system under various external effects.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145075747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"2D materials in functional optoelectronics: recent advances and future prospects.","authors":"Ravi P Srivastava, Pranay Ranjan, Mukesh Kumar, Ajit K Katiyar","doi":"10.1088/1361-6528/ae074a","DOIUrl":"10.1088/1361-6528/ae074a","url":null,"abstract":"<p><p>Two-dimensional (2D) semiconductors, such as MXenes, transition metal dichalcogenides, black phosphorus, and emerging van der Waals heterostructures, have revolutionized the field of optoelectronics by offering exceptional electrical, optical, and mechanical properties at atomic-scale thickness. Their unique features, including tunable bandgaps, high absorption coefficients, and strong excitonic effects, enable a wide range of light detection and light emission applications, making them key materials for next-generation functional optoelectronic devices. This review explores recent breakthroughs in light detection technologies using 2D materials. As photodetectors, they offer ultrafast response rates and high sensitivity across a broad spectral range. In solar cell applications, 2D materials contribute to the development of lightweight, flexible, and efficient photovoltaic devices with enhanced charge transport. Image sensors based on 2D materials exhibit superior spatial resolution and spectral selectivity, while their integration into biomedical imaging platforms enables non-invasive diagnostics due to their biocompatibility. Furthermore, novel morphable light-tracking devices leverage the mechanical flexibility and photoresponsivity of 2D materials for adaptive photonic systems in wearable and robotic applications. On the emission front, 2D semiconductors are emerging as active light-emitting materials in LEDs, lasers, and quantum emitters, benefiting from direct bandgaps in monolayers and strong quantum confinement effects. Additionally, their application as backplane driving circuits in flexible displays is gaining momentum due to their high mobility, mechanical robustness, and transparency, enabling foldable and stretchable display technologies. Despite these advancements, practical implementation faces persistent intrinsic challenges such as high contact resistance, environmental instability, difficulties in controlled doping, and a lack of scalable, reproducible synthesis methods. These issues hinder device reliability and integration. This review also outlines the perspective toward commercialization, emphasizing the need for advancements in heterostructure engineering, and interface optimization. Through interdisciplinary collaboration and innovative material processing, 2D semiconductors are poised to reshape the landscape of optoelectronics, bridging the gap between fundamental science and practical technologies.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145075704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surfactant-Free Gold Nanostars as a Colloidal Substrate for the Surface-Enhanced Raman Spectroscopy of Grouper Epidermal Mucus.","authors":"Nathaniel Leong, Chou Min Chong, Annie Christianus, Zuraidah Zan, Mohd Adzir Mahdi, Mohammed T Alresheedi, Norita Mohd Yusoff, M H Yaacob","doi":"10.1088/1361-6528/ae0ada","DOIUrl":"https://doi.org/10.1088/1361-6528/ae0ada","url":null,"abstract":"<p><p>Surface-enhanced Raman spectroscopy (SERS) is an emerging analytical method for biological analysis, leveraging the \"lightning rod\" effect of metallic nanostructures to intensely amplify signals. Gold nanostars, with their numerous sharp tips, are particularly effective SERS substrates. In this work, biocompatible gold nanostars without harmful surfactants were synthesized using silver ions to control spike formations. Gold nanostars were investigated as a colloidal SERS substrate for the in-solution analysis of grouper epidermal mucus, a key indicator of fish health. The morphology of the gold nanostars was tuned by varying the concentration of silver nitrate (AgNO3) from 0.5 to 3 mM. It was found that an increase in AgNO3 led to higher spike density but shorter, lower aspect ratio spikes. Gold nanostars synthesised with 1 mM AgNO3 produced the highest aspect ratio (3.25) and were shown to exhibit the strongest SERS enhancement. This was validated across various analytes, including Rhodamine 6G, lysozyme and the grouper epidermal mucus itself. The enhancement factor of 4.72×10⁶and 7.62×10⁵were obtained with Rhodamine 6G and lysozyme, respectively. Ultimately, gold nanostars with long spikes were proven to be superior for in-solution SERS, achieving an enhancement factor two orders of magnitude higher than that of spherical gold nanoparticles in our previous work.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145138181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Universal Strategy for Fabricating Bimetallic Nanoparticle/N-Doped Carbon Electrocatalysts Enabling Wide-Temperature Zinc-Air Batteries.","authors":"Wenxian Liu, Boyang Zhou, Jiale Dai, Yilin Zhao, Fangfang Wu, Wenhui Shi, Xiehong Cao","doi":"10.1088/1361-6528/ae09b3","DOIUrl":"https://doi.org/10.1088/1361-6528/ae09b3","url":null,"abstract":"<p><p>Zinc-air batteries (ZABs) exhibit significant potential for energy storage applications. However, their semi-open configuration renders the cathodic oxygen reduction reaction (ORR) highly susceptible to temperature fluctuations. Herein, we present a versatile strategy for preparing bimetallic nanoparticles embedded in nitrogen-doped carbon composites (BM NPs/NC), including FeCo, CuCo, NiCo, and MnCo NPs/NC. By modulating the chemical composition of the nanoparticle precursors, we optimize the catalytic performance of these composites for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Specifically, FeCo NPs/NC exhibits exceptional ORR activity, with a half-wave potential of 0.89 V, and high OER performance with a low overpotential of 0.324V at 10 mA cm-2. When integrated into ZABs, FeCo NPs/NC-based batteries demonstrate remarkable peak power density, specific capacity, and cycling stability (800 h). The batteries retain 97.6% and 95.8% of their room-temperature specific capacity at -20 °C and 60 °C, respectively, and exhibit excellent performance across a wide temperature range. This work highlights the potential of BM NPs/NC for practical applications in extreme environments.&#xD.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145125306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}