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MBE growth and properties of branched AlGaAs nanowires on silicon. 硅片上支化AlGaAs纳米线的MBE生长及性能研究。
IF 2.9 4区 材料科学
Nanotechnology Pub Date : 2025-05-16 DOI: 10.1088/1361-6528/add9aa
Rodion Reznik, Anna S Andreeva, Konstantin Kotlyar, Artem Khrebtov, Igor Vladimirovich Ilkiv, Vladislav Gridchin, Ilya Soshnikov, Alexander V Syuy, Alexey Kuznetsov, Alexey D Bolshakov, George E Cirlin, Vladimir G Dubrovskii
{"title":"MBE growth and properties of branched AlGaAs nanowires on silicon.","authors":"Rodion Reznik, Anna S Andreeva, Konstantin Kotlyar, Artem Khrebtov, Igor Vladimirovich Ilkiv, Vladislav Gridchin, Ilya Soshnikov, Alexander V Syuy, Alexey Kuznetsov, Alexey D Bolshakov, George E Cirlin, Vladimir G Dubrovskii","doi":"10.1088/1361-6528/add9aa","DOIUrl":"https://doi.org/10.1088/1361-6528/add9aa","url":null,"abstract":"<p><p>Branched III-V nanowires are interesting both from the fundamental viewpoint and for the development of electronic and optoelectronic structures with enhanced functionality. Herein, we present a robust approach to synthesis of branched AlGaAs nanowires using the Au-catalyzed molecular-beam epitaxy directly on Si(111) substrates. The second and third deposition of Au onto the substrate with nanowires gives rise to the first and second generation of branches. First generation branches grow in the [1-100] direction perpendicular to the nanowire trunks; their coalescence yields the nanowire bridging. Compositional and structural analysis, performed by transmission electron microscopy and Raman spectroscopy, reveal an AlAs fraction of 0.2-0.3 and almost pure wurtzite crystal phase of both nanowire trunks and uncoalesced branches of the first generation. According to the microscopy measurements the wurzite phase purity is more than 95%. The method is useful for obtaining complex branched structures in wurtzite AlGaAs nanowires on Si substrates, and may be translated to other material systems. These branched structures open new perspectives for next generation optoelectronic, energy harvesting and biological devices creation.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144086445","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}
引用次数: 0
mRNA lipid nanoparticles in CAR-T therapy: a novel strategy to improve efficacy. mRNA脂质纳米颗粒在CAR-T治疗中:一种提高疗效的新策略。
IF 2.9 4区 材料科学
Nanotechnology Pub Date : 2025-05-16 DOI: 10.1088/1361-6528/add482
Zengkai Zhao, Mingmei Li, Xiang Zheng, Pengli Gao, Chenlu Huang, Qingyu Yu, Limin Jin, Linhua Zhang, Dunwan Zhu, Fangzhou Li
{"title":"mRNA lipid nanoparticles in CAR-T therapy: a novel strategy to improve efficacy.","authors":"Zengkai Zhao, Mingmei Li, Xiang Zheng, Pengli Gao, Chenlu Huang, Qingyu Yu, Limin Jin, Linhua Zhang, Dunwan Zhu, Fangzhou Li","doi":"10.1088/1361-6528/add482","DOIUrl":"https://doi.org/10.1088/1361-6528/add482","url":null,"abstract":"<p><p>Chimeric antigen receptor T cells (CAR-T) immunotherapy has achieved remarkable progress in the treatment of hematological malignancies. However, it encounters challenges including complex manufacturing processes, high cost, and safety issues. Lipid nanoparticle (LNP) technology, as an advanced gene delivery platform, offers significant advancements to CAR-T therapy through its high efficiency, low immunogenicity, and safety. LNP enable<i>in vivo</i>production of CAR-T cells, thereby improving delivery efficiency, reducing the risks of immunogenicity and insertional mutations, simplifying the production process and reducing costs. The scalability and rapid optimization ability of LNP position them as promising candidates for CAR-T cell production. LNP technology is expected to further promote the development of CAR-T immunotherapy and provide safer and more economical treatment options. Therefore, this paper aims to provide a comprehensive and systematic review of the application of LNP in CAR-T therapy. In this review, we initially outline the fundamental design, process, and current challenges of CAR-T therapy. Subsequently, we present the characteristics of LNP, their advantages as a gene delivery vectors, and how they improve the efficacy of CAR-T therapy. Finally, we summarize the current research landscape of LNP applications in CAR-T therapy. This includes enhancing<i>in vitro</i>transfection of T cells, programming T cells<i>in situ</i>, facilitating T-cell activation, alleviating the side effects of CAR-T therapy, and combining CAR-T therapy with other immunotherapies. These advancements will aid in the design of mRNA delivery systems based on LNP, thereby promoting the development of CAR-T therapy.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":"36 22","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144079197","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}
引用次数: 0
Wafer-scale synthesis of transition metal dichalcogenides and van der Waals heterojunctions. 过渡金属二硫族化合物和范德华异质结的晶片尺度合成。
IF 2.9 4区 材料科学
Nanotechnology Pub Date : 2025-05-16 DOI: 10.1088/1361-6528/add9a9
Shiwei Zhang, Yulong Hao, Shijie Hao, Xuemei Lu, Jie Zhou, Chen Fan, Jun Liu, Guolin Hao
{"title":"Wafer-scale synthesis of transition metal dichalcogenides and van der Waals heterojunctions.","authors":"Shiwei Zhang, Yulong Hao, Shijie Hao, Xuemei Lu, Jie Zhou, Chen Fan, Jun Liu, Guolin Hao","doi":"10.1088/1361-6528/add9a9","DOIUrl":"https://doi.org/10.1088/1361-6528/add9a9","url":null,"abstract":"<p><p>Two-dimensional (2D) materials, as a promising class of emerging materials, are expected to overcome the technical bottlenecks of silicon-based device miniaturization and enable the continuation of \"Moore's Law\" due to their unique physical and chemical properties. Notably, transition metal dichalcogenides (TMDs) and heterojunctions have demonstrated unprecedented application potential in novel electronic and optoelectronic devices. In recent years, breakthroughs have been continuously made in the preparation techniques and growth strategies of wafer-scale TMDs and heterostructures. Therefore, it is essential to systematically and comprehensively summarize the latest progress in wafer-scale synthesis. This article provides an in-depth review of the relevant preparation techniques and strategies for wafer-scale TMDs and heterostructures. Firstly, various wafer-scale synthesis techniques are described. On this basis, the synthesis strategies derived from chemical vapor deposition (CVD) are highlighted. Finally, we discuss the challenges and prospects associated with the preparation of wafer-scale materials. &#xD.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144086463","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}
引用次数: 0
Recent advances in nanomaterials for wearable devices: classification, synthesis, and applications. 可穿戴设备纳米材料的最新进展:分类、合成和应用。
IF 2.9 4区 材料科学
Nanotechnology Pub Date : 2025-05-16 DOI: 10.1088/1361-6528/add9a8
Tongju Zhang, Lulu Li, Xidi Sun, Yi Shi, Wen Cheng, Lijia Pan
{"title":"Recent advances in nanomaterials for wearable devices: classification, synthesis, and applications.","authors":"Tongju Zhang, Lulu Li, Xidi Sun, Yi Shi, Wen Cheng, Lijia Pan","doi":"10.1088/1361-6528/add9a8","DOIUrl":"https://doi.org/10.1088/1361-6528/add9a8","url":null,"abstract":"<p><p>Wearable devices have a wide range of applications in mobile electronics, energy storage, human movement and health monitoring due to their flexibility, comfort and portability. Nanomaterials have excellent electrical conductivity and mechanical properties due to being in the nanoscale range with small size and surface effects that alter electrical properties. This paper focuses on the progress of research on advanced nanomaterials in the wearable field, including the classification of nanomaterials, physical, chemical, microwave-assisted, and biological synthesis for nanomaterials, as well as spinning, textile coating, and 3D printing of fabricating functional layers of nanodevices. In addition, its importance in thermal management devices, telemedicine and monitoring, assistance for the disabled and mental health and sleep monitoring is analyzed. Finally, the current challenges and future directions of the field are discussed. This review will be of great interest and inspiration for developing and improving novel nanomaterials and advanced wearable nanodevices.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144086449","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}
引用次数: 0
Plasmonic catalysis with bi-resonant noble metal - CuFeS2chalcopyrite hybrid structures. 双共振贵金属- cufes2黄铜矿杂化结构的等离子体催化。
IF 2.9 4区 材料科学
Nanotechnology Pub Date : 2025-05-15 DOI: 10.1088/1361-6528/add93f
Koustav Kundu, Tianhong Ouyang, Björn Reinhard
{"title":"Plasmonic catalysis with bi-resonant noble metal - CuFeS<sub>2</sub>chalcopyrite hybrid structures.","authors":"Koustav Kundu, Tianhong Ouyang, Björn Reinhard","doi":"10.1088/1361-6528/add93f","DOIUrl":"https://doi.org/10.1088/1361-6528/add93f","url":null,"abstract":"<p><p>Both noble metal nanoparticles (NPs) and chalcopyrite (CuFeS2) nanocrystals (NCs) provide resonant absorption in the visible, albeit through different mechanisms. Coherent oscillations of free conduction band electrons give rise to localized plasmons in noble metal NPs, whereas collective oscillations of bound electrons are responsible for quasistatic resonances in CuFeS2 NCs. This manuscript reviews the photophysical and photocatalytic properties of both noble metal and chalcopyrite nanostructures as well as direct and indirect charge and energy transfer processes in hybrid structures containing noble metal NPs and either semiconductor NCs or molecular photosensitizers or photocatalysts. CuFeS2 NCs share structural similarities with conventional semiconductor NCs, but the availability of collective charge oscillations in the visible facilitates a resonant coupling to localized plasmons in NPs. Hybrid nanostructures containing both metal and chalcopyrite building blocks are examined as a platform for wavelength-dependent charge and energy transfer and bifunctional reactivity for enhanced plasmonic photocatalysis.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144079171","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}
引用次数: 0
Soft-hard magnetic phase tuning of FeCo nanowire arrays by electrodeposition current density. 电沉积电流密度对FeCo纳米线阵列的软硬磁相位调谐。
IF 2.9 4区 材料科学
Nanotechnology Pub Date : 2025-05-15 DOI: 10.1088/1361-6528/add940
Seyed Javad Hosseini, Mohammad Almasi Kashi, Amir H Montazer
{"title":"Soft-hard magnetic phase tuning of FeCo nanowire arrays by electrodeposition current density.","authors":"Seyed Javad Hosseini, Mohammad Almasi Kashi, Amir H Montazer","doi":"10.1088/1361-6528/add940","DOIUrl":"https://doi.org/10.1088/1361-6528/add940","url":null,"abstract":"<p><p>A better understanding of magnetic phases and interactions in nanomaterials can provide new pathways for the development of tunable magnetic storage media, facilitating their design and integration in nanodevices. Here, we use a pulse electrochemical method, and change the electrodeposition current density (Jed) in the range of 12.50-37.50 mA/cm2 in order to fabricate FeCo nanowire arrays (NWAs) in mild-anodized aluminum oxide membranes. While the length and composition of the NWs are not considerably affected with increasing Jed, we observe obvious changes in the shape of magnetic hysteresis curves, arising from the coupling of soft-hard phases. By investigating the crystalline properties of the NWAs, the hard phase is attributed to almost Fe50Co50 alloy structure, whereas the soft phase is due to the presence of magnetic oxides, including CoO and FeO. We obtain first-order reversal (FORC) diagrams to study the two phases in more detail, indicating the involvement of interference and complex features. The increasing trends observed in hysteresis curve coercivity and squareness from 416 to 1752 Oe and 0.12 to 0.80 with increasing Jed from 12.50 to 37.50 mA/cm2, respectively, are accompanied with significant reductions in soft phase intensity and interphase magnetic interactions. Our results indicate the possibility of tuning soft-hard magnetic phases in FeCo NWAs through controlling Jed during the electrodeposition process in the membranes.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144079186","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}
引用次数: 0
Characterization and discrimination of periodic nanostructures with scanning-free GEXRF. 无扫描GEXRF表征和判别周期性纳米结构。
IF 2.9 4区 材料科学
Nanotechnology Pub Date : 2025-05-14 DOI: 10.1088/1361-6528/add89a
Nils Wauschkuhn, Yves Kayser, Jonas Baumann, Johannes Degenhardt, Thomas Siefke, Vinh-Binh Truong, Victor Soltwisch, Burkhard Beckhoff, Philipp Hönicke
{"title":"Characterization and discrimination of periodic nanostructures with scanning-free GEXRF.","authors":"Nils Wauschkuhn, Yves Kayser, Jonas Baumann, Johannes Degenhardt, Thomas Siefke, Vinh-Binh Truong, Victor Soltwisch, Burkhard Beckhoff, Philipp Hönicke","doi":"10.1088/1361-6528/add89a","DOIUrl":"https://doi.org/10.1088/1361-6528/add89a","url":null,"abstract":"<p><p>As nanostructures in the semiconductor industry become smaller and more complex, non-destructive characterization methods capable of measuring buried domains become crucial. Grazing emission X-ray fluorescence (GEXRF) spectroscopy is a measurement technique capable of resolving nanometer-sized features of buried nanostructures while providing information about the sample's elemental distribution.&#xD;In this work, a study was conducted to realistically assess the uncertainties of this method, considering correlations between geometric parameters. Furthermore, we showed strategies to effectively reduce the measurement time in GEXRF experiments by applying state-of-the-art single photon evaluation and machine learning denoising techniques for two-dimensional detectors. The study was performed on two different sample positions on a HfO<sub>2</sub>/TiO<sub>2</sub>nanograting, where the GEXRF method was able to resolve geometric differences between them. Based on a finite element method (FEM) model of the nanograting, the expected fluorescence intensities can be simulated, from which the nanostructure's geometry can be reconstructed. The reconstructed geometric shapes show good agreement with atomic force microscope and transmission electron microscope measurements, highlighting the method's capability for investigating samples within the nanometer regime.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144079164","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}
引用次数: 0
A low-cost broadband photodetector based on CsPbBr3quantum dots/transfer-free eco-friendly graphene heterostructures for fast photoresponse. 基于cspbbr3量子点/无转移环保石墨烯异质结构的低成本宽带光电探测器,用于快速光响应。
IF 2.9 4区 材料科学
Nanotechnology Pub Date : 2025-05-14 DOI: 10.1088/1361-6528/add899
Yi-Chia Cheng, Chih-Yu Lin, Chia-Hsuan Tseng, Meng-Lin Tsai, Sheng-Kuei Chiu, Ji-Lin Shen, S-L Chen, Chiashain Chuang, Dung-Sheng Tsai
{"title":"A low-cost broadband photodetector based on CsPbBr<sub>3</sub>quantum dots/transfer-free eco-friendly graphene heterostructures for fast photoresponse.","authors":"Yi-Chia Cheng, Chih-Yu Lin, Chia-Hsuan Tseng, Meng-Lin Tsai, Sheng-Kuei Chiu, Ji-Lin Shen, S-L Chen, Chiashain Chuang, Dung-Sheng Tsai","doi":"10.1088/1361-6528/add899","DOIUrl":"https://doi.org/10.1088/1361-6528/add899","url":null,"abstract":"<p><p>We have successfully demonstrated CsPbBr<sub>3</sub>perovskite quantum dots (QDs)/transfer-free eco-friendly (TFEF) graphene heterostructures with broadband and fast photoresponse. At first, the TFEF graphene is grown directly on the SiO<sub>2</sub>/Si substrates in an atmospheric pressure chemical vapor deposition (APCVD) system with the copper-foil wrapping methods and camphor precursors. Raman mapping image (15 × 15 μm<sup>2</sup>) showed TFEF graphene with high coverage across the surface (~65% single-layer graphene, ~15% bilayer graphene, and ~20% multilayer graphene). After that, CsPbBr<sub>3</sub>QDs were synthesized and then spin-coated on the TFEF graphene surface to form heterostructures. Compared to pure CsPbBr<sub>3</sub>QD-based photodetectors (PDs), CsPbBr<sub>3</sub>QDs/TFEF graphene-based PDs show a higher photo-to-dark current ratio (PDCR) of ~ 7.2 at 2V white light illumination (112 mW/cm<sup>2</sup>). Furthermore, the CsPbBr<sub>3</sub>QDs/TFEF graphene-based PDs show a broadband photoresponse range from UV to near-infrared (NIR) with a peak responsivity reaching up to 32 mA/W, a high detectivity (2.2 × 10<sup>10</sup>cm·Hz<sup>1/2</sup>/W) and fast operation speed (rise/fall time: ~7/~14 ms). This study opens avenues to develop low-cost and rapid fabrication processes of perovskite/2D nanomaterial-based PDs for fast optical communication, image capture, and flame detection applications.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":" ","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144079160","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}
引用次数: 0
Advances in targeted therapy for inflammatory breast cancer: nanomaterials, conventional treatments, and clinical applications. 炎性乳腺癌靶向治疗的进展:纳米材料、常规治疗和临床应用。
IF 2.9 4区 材料科学
Nanotechnology Pub Date : 2025-05-13 DOI: 10.1088/1361-6528/add165
Eshana Bhattacharya, Siuli Shaw, Ranu Nayak, Sudeep Bose
{"title":"Advances in targeted therapy for inflammatory breast cancer: nanomaterials, conventional treatments, and clinical applications.","authors":"Eshana Bhattacharya, Siuli Shaw, Ranu Nayak, Sudeep Bose","doi":"10.1088/1361-6528/add165","DOIUrl":"https://doi.org/10.1088/1361-6528/add165","url":null,"abstract":"<p><p>Inflammatory breast cancer (IBC) presents a formidable challenge due to its rapid progression and unique clinical characteristics within the various manifestations of breast cancer. Despite being rare, its aggressive nature demands innovative approaches beyond conventional treatments. Nanomedicine offers exciting possibilities for improving all types of breast cancer therapeutics including IBC. In this review, we critically assess the current treatment landscape for IBC, highlighting the limitations of traditional methods and addressing the pressing need for new therapeutic strategies. Although many nanomaterials have been explored for breast cancer therapeutics, either alone or in combination with other therapies, only a limited number of nanotherapeutics have been extensively studied for IBC treatment. This review further explores how advancements in nanotechnology, such as nanoparticle- mediated photothermal therapy, Photodynamic therapy, and nanomedicinal targeted therapies can offer novel avenues for addressing the unique biological, technological, and regulatory challenges posed by IBC. IBC-related various nanomedicines based combinatorial therapies are highlighted in this review. It also provides a forward-looking perspective on key research directions and clinical applications.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":"36 22","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143972078","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}
引用次数: 0
Facile synthesis of cubic Ni1-xCrxnanoalloys and their composition-dependent electrocatalytic activity for the hydrogen evolution reaction. 立方ni1 - xcrx纳米合金的易合成及其组分依赖性析氢反应的电催化活性
IF 2.9 4区 材料科学
Nanotechnology Pub Date : 2025-05-13 DOI: 10.1088/1361-6528/add26f
Md Kawsar Alam, Manish Kumar Mohanta, Daulton White, Jordon Baker, Lisa S Graves, Puru Jena, Indika U Arachchige
{"title":"Facile synthesis of cubic Ni<sub>1-<i>x</i></sub>Cr<i><sub>x</sub></i>nanoalloys and their composition-dependent electrocatalytic activity for the hydrogen evolution reaction.","authors":"Md Kawsar Alam, Manish Kumar Mohanta, Daulton White, Jordon Baker, Lisa S Graves, Puru Jena, Indika U Arachchige","doi":"10.1088/1361-6528/add26f","DOIUrl":"https://doi.org/10.1088/1361-6528/add26f","url":null,"abstract":"<p><p>The viability of the electrolysis of water currently relies on expensive catalysts such as Pt that are far too impractical for industrial scale use. Thus, there is considerable interest in developing low-cost, earth-abundant nanomaterials and their alloys as a potential alternative to existing standard catalysts. To address this issue, a synergistic approach involving theory and experiment was carried out. The former, based on density functional theory, was conducted to guide the experiment in selecting the ideal dopant and optimal concentration by focusing on 3d, 4d, and 5d elements as dopants on Ni (001) surface. Subsequently, a series of Ni<sub>1-<i>x</i></sub>Cr<i><sub>x</sub></i>(<i>x</i>= 0.01-0.09) alloy nanocrystals (NCs) with size ranging from 8.3 ± 1.6-18.2 ± 3.2 nm were colloidally synthesized to experimentally investigate the hydrogen evolution reaction (HER) activity. A compositional dependent trend for electrocatalytic activity was observed from both approaches with Ni<sub>0.92</sub>Cr<sub>0.08</sub>NCs showed the lowest Δ<i>G</i><sub>H</sub>value and the lowest overpotential (<i>η</i><sub>-10</sub>) at -10 mA cm<sup>-2</sup>current density (<i>j</i>), suggesting the highest HER activity among all compositions studied. Among alloy NCs, the highest performing Ni<sub>0.92</sub>Cr<sub>0.08</sub>composition displayed a mixed Volmer-Heyrovsky HER mechanism, the lowest Tafel slope, and improved stability in alkaline solutions. This study provides critical insights into enhancing the performance of earth-abundant metals through doping-induced electronic structure variation, paving the way for the design of high-efficiency catalysts for water electrolysis.</p>","PeriodicalId":19035,"journal":{"name":"Nanotechnology","volume":"36 22","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144029714","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}
引用次数: 0
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