Nanomaterials最新文献

{"title":"Mechanism of Tailoring Laser-Induced Periodic Surface Structures on 4H-SiC Crystal Using Ultrashort-Pulse Laser.","authors":"Erxi Wang, Chong Shan, Xiaohui Zhao, Huamin Kou, Qinghui Wu, Dapeng Jiang, Xing Peng, Penghao Xu, Zhan Sui, Yanqi Gao","doi":"10.3390/nano15181398","DOIUrl":"10.3390/nano15181398","url":null,"abstract":"<p><p>In this study, we examine the characteristics of laser-induced periodic surface structures (LIPSSs) fabricated on N-doped 4H-SiC (N-SiC) and high-purity 4H-SiC (HP-SiC) crystals using femtosecond-picosecond lasers. The effects of various laser parameters on the orientation, size, and morphology of the LIPSS are systematically investigated. The results reveal that, under identical laser irradiation conditions, the area of LIPSS on both N-SiC and HP-SiC increases linearly with the number of pulses, with N-SiC exhibiting a higher growth coefficient. Furthermore, analysis of differences in photothermal weak absorption and electric field modulation during the LIPSS fabrication process indicates that distinct SiC crystals yield varied LIPSS formation outcomes. This work not only elucidates the underlying physical mechanisms governing LIPSS formation on different silicon carbide crystal surfaces but also provides valuable guidance for precisely controlling the size and orientation of LIPSS regions on various 4H-SiC substrates.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 18","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12472524/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145149917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"O₂-to-Ar Ratio-Controlled Growth of Ga₂O₃ Thin Films by Plasma-Enhanced Thermal Oxidation for Solar-Blind Photodetectors.","authors":"Rujun Jiang, Bohan Xiao, Yuna Lu, Zheng Liang, Qijin Cheng","doi":"10.3390/nano15181397","DOIUrl":"10.3390/nano15181397","url":null,"abstract":"<p><p>Ga₂O₃ is an ultra-wide bandgap semiconductor material that has attracted significant attention for deep ultraviolet photodetector applications due to its excellent UV absorption capability and reliable stability. In this study, a novel plasma-enhanced thermal oxidation (PETO) method has been proposed to fabricate Ga₂O₃ thin films on the GaN/sapphire substrate in the gas mixture of Ar and O₂. By adjusting the O₂-to-Ar ratio (2:1, 4:1, and 8:1), the structural, morphological, and photoelectric properties of the synthesized Ga₂O₃ films are systematically studied as a function of the oxidizing atmosphere. It is demonstrated that, at an optimal O₂-to-Ar ratio of 4:1, the synthesized Ga₂O₃ thin film has the largest grain size of 31.4 nm, the fastest growth rate of 427.5 nm/h, as well as the lowest oxygen vacancy concentration of 16.61%. Furthermore, the nucleation and growth of Ga₂O₃ thin films on the GaN/sapphire substrate by PETO is proposed. Finally, at the optimized O₂-to-Ar ratio of 4:1, the metal-semiconductor-metal-structured Ga₂O₃-based photodetector achieves a specific detectivity of 2.74×1013 Jones and a solar-blind/visible rejection ratio as high as 116 under a 10 V bias. This work provides a promising approach for the cost-effective fabrication of Ga₂O₃ thin films for UV photodetector applications.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 18","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12472540/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145149939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Humics-Functionalized Iron(III) Oxyhydroxides as Promising Nanoferrotherapeutics: Synthesis, Characterization, and Efficacy in Iron Delivery.","authors":"Anastasiya M Zhirkova, Maria V Zykova, Evgeny E Buyko, Karina A Ushakova, Vladimir V Ivanov, Denis A Pankratov, Elena V Udut, Lyudmila A Azarkina, Sergey R Bashirov, Evgenii V Plotnikov, Alexey N Pestryakov, Mikhail V Belousov, Irina V Perminova","doi":"10.3390/nano15181400","DOIUrl":"10.3390/nano15181400","url":null,"abstract":"<p><p>Iron deficiency anemia (IDA) remains a global health challenge. This study pioneers the use of humic substances (HS) as natural, biocompatible macroligands to develop safer and more effective nanoferrotherapeutics. We synthesized a series of nanoscale Fe(III) oxyhydroxide complexes stabilized by different HS, employing various solvents (ethanol, isopropanol, and acetone) and precipitation methods to isolate fractions with optimized properties. The nanocomposites were comprehensively characterized using inductively coupled plasma atomic emission spectrometry, total organic carbon analysis, X-ray diffraction, transmission electron microscopy, and Mössbauer spectroscopy. Cytotoxicity and iron bioavailability of all HS-Fe(III) formulations were assessed in Caco-2 intestinal epithelial cells. The type of HS and precipitation conditions significantly influenced the nanocomposites' properties, yielding spherical nanoparticles (1-2 nm) of ferrihydrite or goethite. Physicochemical analysis confirmed that solvent-driven fractionation effectively tailored the nanocomposites' size, crystallinity, and elemental composition. All HS-Fe(III) formulations demonstrated exceptional cytocompatibility, starkly contrasting the significant cytotoxicity of the reference drug Ferrum Lek^®. Several complexes, particularly CHSFe-Et67, surpassed Ferrum Lek^® in cellular iron uptake efficiency. We conclude that HS are a highly promising platform for developing effective and safe iron-delivery nanoferrotherapeutics, leveraging their natural polyfunctionality to enhance bioavailability and mitigate toxicity.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 18","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12472974/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145150204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pd/SiC-Catalyzed Visible-Light-Driven N-Methylation of Nitroaranes Using Formaldehyde.","authors":"Dongfang Hou, Ruifeng Guo, Xianshu Dong, Yuping Fan, Jingru Wang, Xili Tong","doi":"10.3390/nano15181394","DOIUrl":"10.3390/nano15181394","url":null,"abstract":"<p><p>Pd nanoparticles (Pd/SiC) with a main exposed plane of Pd (111) were prepared by liquid phase reduction. The use of formaldehyde as a methylation reagent for the photocatalytic methylation of aromatic nitro compounds to N,N-methylaniline resulted in one-pot methylations of aromatic nitro compounds with high photocatalytic activity and selectivity under mild reaction conditions. The high catalytic activity of Pd/SiC in N-methylation reactions arises from the Mott-Schottky contact between Pd and SiC, which promotes the transfer of photogenerated electrons to Pd. The high selectivity is ascribed to the ability of Pd nanoparticles to catalyze the hydrogenation of nitro groups to amino groups, which subsequently undergo direct methylation with formaldehyde, bypassing the intermediate formylation step.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 18","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12472968/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145150009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable Materials for Energy.","authors":"Filippo Agresti, Giuliano Angella, Humaira Arshad, Simona Barison, Davide Barreca, Paola Bassani, Simone Battiston, Carlo Alberto Biffi, Maria Teresa Buscaglia, Giovanna Canu, Francesca Cirisano, Silvia Maria Deambrosis, Angelica Fasan, Stefano Fasolin, Monica Favaro, Michele Ferrari, Stefania Fiameni, Jacopo Fiocchi, Marco Fortunato, Donatella Giuranno, Parnian Govahi, Jacopo Isopi, Francesco Montagner, Cecilia Mortalò, Enrico Miorin, Rada Novakovic, Luca Pezzato, Daniela Treska, Ausonio Tuissi, Barbara Vercelli, Francesca Villa, Francesca Visentin, Valentina Zin, Maria Losurdo","doi":"10.3390/nano15181388","DOIUrl":"10.3390/nano15181388","url":null,"abstract":"<p><p>The sustainable production of energy without environmental footprints is a challenge of paramount importance to satisfy the ever-increasing global demand and to promote economic and social growth through a greener perspective. Such awareness has significantly stimulated worldwide efforts aimed at exploring various energy paths and sources, in compliance with the ever more stringent environmental regulations. Research advancements in these fields are directly dependent on the design, fabrication, and implementation of tailored multi-materials for efficient energy production and harvesting and storage devices. Herein, we aim at providing a survey on the ongoing research activities related to various aspects of functional materials for energy production, conversion, and storage. In particular, we present the opportunities and the main open challenges related to multifunctional materials spanning from carbon-based nanostructures for chemical energy conversion, ferroelectric ceramics for energy harvesting, and phase change materials for thermal energy storage to metallic materials for hydrogen technologies, heat exchangers for wind energy, and amphiphobic coatings for the protection of solar panels. The relevance of designing tailored materials for power generation is also presented. Finally, the importance of applying life cycle assessment to materials is emphasized through the case study of AlTiN thin films.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 18","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12472261/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145150059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oxidation of Supported Nickel Nanoparticles: Effects of Lattice Strain and Vibrational Excitations of Active Sites.","authors":"Sergey Yu Sarvadii, Andrey K Gatin, Nadezhda V Dokhlikova, Sergey A Ozerin, Vasiliy A Kharitonov, Dinara Tastaibek, Vladislav G Slutskii, Maxim V Grishin","doi":"10.3390/nano15181390","DOIUrl":"10.3390/nano15181390","url":null,"abstract":"<p><p>This work investigated the oxidation in an atmosphere of N₂O of different surface areas of single nickel nanoparticles deposited on highly oriented pyrolytic graphite (HOPG). Using scanning tunneling microscopy and spectroscopy, it was shown that oxide formation begins at the top of the nanoparticle, while the periphery is resistant to oxidation. The active site of oxygen incorporation is a vibrationally excited group of nickel atoms, and the gap between them is the place where an oxygen adatom penetrates. The characteristic time of vibrational relaxation of the active site is 10^-9-10^-7 s. The reason for the oxidation resistance is the deformation of the nanoparticle atomic lattice near the Ni-HOPG interface. A relative compression of the nanoparticle atomic lattice <i>ξ</i> = 0.4-0.8% was shown to be enough for such an effect to manifest. Such compression increases the activation energy for oxygen incorporation by 6-12 kJ/mol, resulting in inhibition of oxide growth at the periphery of the nanoparticle. In fact, in this work, oxygen adatoms served as probes, and their incorporation between nickel atoms allowed the measurement of the nanoparticle's lattice parameters at different distances from the Ni-HOPG interface. The developed theoretical framework not only accounts for the observed oxidation behavior but also offers a potential pathway to estimate charge transfer and local work functions for deposited nickel catalysts.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 18","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12472473/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145149947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Zhou et al. Flexible and Effective Preparation of Magnetic Nanoclusters via One-Step Flow Synthesis. <i>Nanomaterials</i> 2022, <i>12</i>, 350.","authors":"Lin Zhou, Lu Ye, Yangcheng Lu","doi":"10.3390/nano15181389","DOIUrl":"10.3390/nano15181389","url":null,"abstract":"<p><p>Following publication, concerns were raised regarding the relevance of a few references in this publication [...].</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 18","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12472283/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145150185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Motamedi et al. Enhancement of Thermostability of <i>Aspergillus flavus</i> Urate Oxidase by Immobilization on the Ni-Based Magnetic Metal-Organic Framework. <i>Nanomaterials</i> 2021, <i>11</i>, 1759.","authors":"Neda Motamedi, Mahmood Barani, Azadeh Lohrasbi-Nejad, Mojtaba Mortazavi, Ali Riahi-Medvar, Rajender S Varma, Masoud Torkzadeh-Mahani","doi":"10.3390/nano15181387","DOIUrl":"10.3390/nano15181387","url":null,"abstract":"<p><p>There was an update made to the original publication [...].</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 18","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12472935/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145150198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review of Current Achievements in Dendrimers and Nanomaterials for Potential Detection and Remediation of Chemical, Biological, Radiological and Nuclear Contamination-Integration with Artificial Intelligence and Remote Sensing Technologies.","authors":"Agnieszka Gonciarz, Robert Pich, Krzysztof A Bogdanowicz, Witalis Pellowski, Jacek Miedziak, Sebastian Lalik, Marcin Szczepaniak, Monika Marzec, Agnieszka Iwan","doi":"10.3390/nano15181395","DOIUrl":"10.3390/nano15181395","url":null,"abstract":"<p><p>Current scientific and technological developments indicate that the need for dendrimers and nanomaterials should be taken into account in aspects such as the detection and remediation of chemical, biological, radiological and nuclear (CBRN) contamination. To evaluate the benefits of dendrimers in CBRN contamination, different characterization methods, toxicological evaluation, and recyclability must be used. The aim of this article is to systematize knowledge about selected nanomaterials and dendrimers as well as chemical, biological, radiological and nuclear (CBRN) hazards in accordance with the principles of green chemistry, engineering, technology and environmental safety. So far, many review articles on dendrimers and nanomaterials have focused on biomedical applications or environmental remediation. In this article, we discuss this topic in more detail, especially in relation to the integration of dendrimers with artificial intelligence and remote sensing technologies. We highlight interdisciplinary synergies-artificial intelligence for smarter design and remote sensing for deployment-that could bridge the gap between nanoscale innovation and real CBRN countermeasures.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 18","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473081/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145149965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chemical Mechanical Polishing of Zerodur^® Using Silica and Ceria Nanoparticles: Toward Ultra-Smooth Optical Surfaces.","authors":"Houda Bellahsene, Saad Sene, Gautier Félix, Nicolas Fabregue, Michel Marcos, Arnaud Uhart, Jean-Charles Dupin, Erwan Oliviero, Joulia Larionova, Marc Ferrari, Yannick Guari","doi":"10.3390/nano15181391","DOIUrl":"10.3390/nano15181391","url":null,"abstract":"<p><p>This study investigates hyperpolishing of Zerodur^® substrates via chemical-mechanical polishing (CMP) using silica (SiO₂) and ceria (CeO₂) nanoparticles as controlled nano-abrasives. A pre-polishing stress-mirror stage was combined with systematic use of nanoparticles of variable size to evaluate surface-state evolution via optical rugosimeter, HRSEM, cross-sectional HRTEM, and XPS. A set of hexagonal mirrors with a circumscribed diameter of 30 mm was polished for one hour with each nanoparticle type. All tested slurries significantly improved surface quality, with both the smallest (37 nm) and largest (209 nm) SiO₂ particles achieving similar final roughness, though larger particles showed a slight performance advantage that could be offset by longer polishing with smaller particles. CeO₂ nanoparticles (30 nm) produced even better process efficiency and surface finishes than 37 nm SiO₂, demonstrating higher chemical-mechanical polishing efficiency with CeO₂. Sequential polishing strategies, first with 209 nm SiO₂, then with 37 nm SiO₂ and 30 nm CeO₂, also enhanced surface quality, confirming trends from single-particle trials. One of the most effective protocols was adapted and scaled up to 135 mm Zerodur^® mirrors with spherical and plano geometries, representative of precision optical components. The strategic approach adopted to achieve a high-quality surface finish in a reduced processing time relies on the sequential use of nanoparticles acting as complementary nano-abrasives. Indeed, applying two hours of polishing with 209 nm SiO₂ followed by two hours with 37 nm SiO₂ yielded exceptional results, with area roughness (Sa) values of 1 Å for spherical and 0.9 Å for plano surfaces. These results demonstrate the capability of nanoparticle-assisted CMP to produce sub-nanometric surface finishes and offer a robust, scalable approach for high-end optical manufacturing.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"15 18","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12472406/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145150095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}