Nanomaterials最新文献

{"title":"Expression of Concern: Swaidan et al. Enhanced Antibacterial Activity of CuS-BSA/Lysozyme Under Near Infrared Light Irradiation. <i>Nanomaterials</i> 2021, <i>11</i>, 2156.","authors":"Nanomaterials Editorial Office","doi":"10.3390/nano16201318","DOIUrl":"10.3390/nano16201318","url":null,"abstract":"<p><p>With this notice, the <i>Nanomaterials</i> Editorial Office alerts readers to concerns regarding this article [...].</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 20","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149220529","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":"RETRACTED: Kaur et al. Synthesis of CaFe₂O₄-NGO Nanocomposite for Effective Removal of Heavy Metal Ion and Photocatalytic Degradation of Organic Pollutants. <i>Nanomaterials</i> 2021, <i>11</i>, 1471.","authors":"Manmeet Kaur, Manpreet Kaur, Dhanwinder Singh, Aderbal C Oliveira, Vijayendra Kumar Garg, Virender K Sharma","doi":"10.3390/nano16201299","DOIUrl":"https://doi.org/10.3390/nano16201299","url":null,"abstract":"<p><p>The Journal retracts the article titled, \"Synthesis of CaFe₂O₄-NGO Nanocomposite for Effective Removal of Heavy Metal Ion and Photocatalytic Degradation of Organic Pollutants\" [...].</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 20","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149220598","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":"Plasma-Assisted and Green Routes to Silicon and Carbon Quantum Dots: A Critical Comparison of Synthesis-Structure-Property Relationships.","authors":"Sagi Orazbayev, Almasbek Utegenov, Assan Abdirakhmanov, Sultan Ussenkhan, Yerassyl Yerlanuly, Didar Batryshev, Moldir Nurusheva, Maratbek Gabdullin, Laifa Boufendi, Holger Vach, Tlekkabul Ramazanov","doi":"10.3390/nano16191273","DOIUrl":"10.3390/nano16191273","url":null,"abstract":"<p><p>Silicon quantum dots (SiQDs) and carbon quantum dots (CQDs) are often discussed as related heavy-metal-free luminescent nanomaterials, although the mechanisms governing their formation and emission differ fundamentally. Rather than combining two parallel bodies of literature, this review uses SiQDs and CQDs as contrasting model systems to determine which synthesis-structure-property relationships are transferable and which remain material-specific. We critically compare nonthermal gas-phase plasma, plasma-liquid, and solution-phase synthesis, including green routes, with respect to precursor activation, nucleation and growth, crystallinity, surface chemistry, purification, photoluminescence, reproducibility, and scalability. Low-pressure continuous-flow radio-frequency capacitively coupled plasma (RF-CCP) is treated as the reference plasma architecture for free-standing Si nanocrystals, while atmospheric-pressure and plasma-liquid approaches are discussed according to their distinct product forms, formation mechanisms, and technological maturity. For crystalline SiQDs, quantum confinement provides a physically defined framework for interpreting size-dependent optical behavior, although oxidation, ligands, and interfacial defects remain critical. In CQDs, emission may arise from carbon-core states, surface or defect states, and molecular fluorophores, making structural assignment and fraction-resolved characterization essential. Across both material families, reported record photoluminescence efficiencies are less informative for technological translation than reproducibility, purified product yield, long-term stability, and application-specific performance. Hybrid plasma-liquid processing, operando diagnostics, standardized optical characterization, and data-guided process optimization are identified as promising directions toward scalable and reproducible quantum-dot manufacturing.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13666692/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149182412","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":"General Preparation of Nickel-Based Compound/Carbon Nanotube Catalysts for the Urea Oxidation Reaction.","authors":"Yanjie Xia, Sheng-Zhi Ma, Yi-Jun Chen, Jia-Wen Du, Chao Zhang, Haibin Sun, Ze-Xing Cai","doi":"10.3390/nano16191276","DOIUrl":"10.3390/nano16191276","url":null,"abstract":"<p><p>Leveraging the flexibility and adaptability of hydrogen bonding, hydrogen-bonded organic framework (HOF) nanowires can serve as effective templates and precursors for the synthesis of hollow structures composed of uniform multielement compounds. Benefiting from the mesoporous nanotube structure and synergistic active sites, the fabricated Ru-Ni₂P/C catalyst delivers low potential, high current density, and good stability. When employed for urea electrolysis, the catalyst enables a current density of 10 mA cm^-2 at potentials of 1.36 V vs. RHE. These findings offer a promising structural and compositional design strategy for developing high-performance electrocatalysts.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13667290/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149183062","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":"Flow-Rate-Controlled Agglomeration and Ambient Oxide Phase Characteristics of Spark-Ablated Copper Nanoparticles.","authors":"Joumana El-Rifai, Eliane Bsaibess, Diaa Mereib, Corinne Bouillet, Mustapha Zaghrioui","doi":"10.3390/nano16191270","DOIUrl":"10.3390/nano16191270","url":null,"abstract":"<p><p>Spark ablation is an attractive gas-phase route for producing ligand-free metal nanoparticles, yet control over agglomeration and phase evolution during deposition remains challenging. The influence of carrier gas flow rate and deposition time on the agglomerate morphology, size distribution, and oxidation behavior of copper nanoparticles deposited onto silicon and glass substrates is investigated. Copper nanoparticles were generated by spark discharge and transported by nitrogen (N₂) carrier gas under flow rates ranging from 0.5 to 3.5 L min^-1 prior to deposition onto silicon substrates for 2 h and 5 h. Scanning electron microscopy reveals a transition from compact, isotropic agglomerates at low flow rates to elongated, chain-like structures at higher flow rates, indicating a shift from coalescence- and restructuring-favored conditions toward increasingly kinetically constrained aggregation. Transmission electron microscopy reveals predominantly spherical nanoparticles with a lognormal size distribution centered at approximately 10 nm, consistent with gas-phase nucleation and coalescence. Structural and spectroscopic analyses suggest CuO as the dominant oxide phase with minor Cu₂O contributions, with Raman spectroscopy providing the primary evidence due to limitations in high-resolution TEM analysis from substrate effects and peak overlap. These findings show that carrier-gas flow rate systematically influences agglomerate structure under the investigated conditions, while oxidation may occur both during aerosol transport and following ambient exposure; the present measurements do not allow the relative contributions of these processes to be quantitatively separated.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13667034/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149183074","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":"Multiwavelength Optical Pulse-Induced Temporal State Mapping in an ITO/SnO₂/ITO Optoelectronic Synaptic Device.","authors":"Senyu Zhuang, Zhuang Hou, Shuqi Teng, Yingqi Zhao, Yongqi Song, Xuanyu Shan, Meng Qi, Mingan Luan, Ye Tao","doi":"10.3390/nano16191268","DOIUrl":"10.3390/nano16191268","url":null,"abstract":"<p><p>A vertical ITO/SnO₂/ITO optoelectronic synaptic device was fabricated by magnetron sputtering for optical sensing and temporal-state encoding. The ITO/SnO₂ stack exhibited 88.3% average transmittance over 400-800 nm. The device responded to 380, 550 and 660 nm illumination and showed paired-pulse facilitation (PPF) together with pulse-width, interval and number-dependent modulation, evidencing finite-timescale history dependence and pulse-dependent accumulation. These dynamics are consistent with rapid photocarrier excitation followed by slower localized-state trapping, detrapping, redistribution and relaxation, detrapping, redistribution and relaxation. All 16 possible 4-bit optical sequences were experimentally applied and identical pulse numbers arranged at different temporal positions produced different final current states. The measured state library was used for visual feature construction: a simple multilayer perceptron achieved 96.06 ± 0.19% test accuracy for MNIST over five independent runs, while a hybrid representation achieved 98.26 ± 0.28% over five independent runs for four-frame trajectory recognition; ablation showed that device-state features preserved temporal-order information. These results support temporal-order-sensitive physical encoding in a simple transparent oxide device.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13667160/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149183370","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":"Challenging the Surface Area Paradigm: A Critical Review of Low-BET Metal-Organic Frameworks for the Adsorption of Organic Water Pollutants.","authors":"Malcom Frimpong Dapaah, Xingbao Zhu, Hui Jia, Huiying Zhang, Ruth Antwi-Baah, Candy Ann Dwamena Darkwa, Liang Cheng","doi":"10.3390/nano16191271","DOIUrl":"10.3390/nano16191271","url":null,"abstract":"<p><p>The application of metal-organic frameworks (MOFs) toward the adsorption of organic pollutants from aqueous systems has attracted heightened attention in recent times. While considerable research works have examined high-surface-area MOFs, growing evidence demonstrates that MOFs with low Brunauer-Emmett-Teller (BET) surface areas (<i>S</i>_BET ≤ 100 m²/g) can also achieve remarkably high pollutant adsorption. This review critically examines, for the first time, recent developments that have enabled low-surface-area MOFs to adsorb organic pollutants from wastewater efficiently. The first part explores compositional modifications of low-surface-area MOF adsorbents, with particular attention to their metal centers. Furthermore, four categories of auxiliary components were delved into. Additionally, the factors influencing adsorbent synthesis were presented. Moreover, low- and high-<i>S</i>_BET MOFs were directly compared. Finally, current challenges and key research gaps were identified. Future research priorities such as rigorous mechanistic validation, performance evaluation in realistic water matrices, improved regeneration strategies, and advancing pilot-scale studies to facilitate practical application were also presented.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13667223/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149183331","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":"Plasmon-Enhanced Copper Nanodendrites as Dual-Function SERS Substrates and Photoelectrochemical H₂O₂ Sensors.","authors":"Ying-Chu Chen, Cing-Jhen Shih, Yu-Kuei Hsu","doi":"10.3390/nano16191269","DOIUrl":"10.3390/nano16191269","url":null,"abstract":"<p><p>A facile, one-step galvanic replacement route was used to grow hierarchical copper nanodendrites (Cu NDs) directly on aluminum (Al) foil, providing a dual-function plasmonic platform for surface-enhanced Raman scattering (SERS) and enzyme-free photoelectrochemical (PEC) detection of hydrogen peroxide (H₂O₂). The Cu NDs were formed by immersing Al foil in an acidified CuSO₄ solution at room temperature, and their fern-leaf morphology, phase purity, and metallic Cu(0) oxidation state were confirmed by scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Using 4-mercaptobenzoic acid (4-MBA) as a probe molecule, the Cu NDs/Al foil substrate achieved SERS detection down to 10^-7 M with an approximate enhancement factor of ~10⁶, consistent with strong localized surface plasmon resonance (LSPR)-driven electromagnetic enhancement. Under simulated solar illumination, LSPR-excited hot carriers additionally accelerated the electrocatalytic reduction of H₂O₂, raising the detection sensitivity from 110.6 to 145.3 μA cm^-2 mM^-1 relative to dark conditions. Wavelength- and intensity-dependent photocurrent measurements confirmed that this enhancement tracks the LSPR absorption band of the Cu NDs rather than photothermal heating. These results establish low-cost, earth-abundant Cu nanodendrites as an effective plasmonic platform for combined optical and electrochemical (bio)sensing.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13666979/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149182319","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":"Facile Enhancement of Corrosion, Wear and UV Aging Resistance of Epoxy Composite Coatings via Graphene Oxide Incorporation.","authors":"Fujun Zhang, Boyi Qiu, Xusheng Du","doi":"10.3390/nano16191275","DOIUrl":"10.3390/nano16191275","url":null,"abstract":"<p><p>UV aging, corrosion and wear resistance of epoxy (EP) coatings are all critical for their long-term service in outdoor environments. In this work, graphene oxide (GO) was used as a multifunctional additive in epoxy coatings to improve these properties. Owing to its two-dimensional sheet-like nanostructure and abundant oxygen-containing functional groups, which enable a favorable interface with the epoxy matrix, incorporating GO into epoxy coatings endows the coating with multiple enhanced performances, including anti-corrosion performance, UV resistance, wear resistance, and adhesion to metal substrates. The resulting GO/EP composite coating exhibits higher adhesion strength (15.08 MPa) than that of neat epoxy coating (12.02 MPa), and delivers excellent corrosion resistance, with a corrosion current density of 4.69 × 10^-11 A·cm^-2 which is as low as 1/3 that of the neat epoxy coating after 25 days of immersion in NaCl solution. Notably, after multiple cycles of thermal cycling testing, the coating maintains an impedance ~40 times higher than that of neat epoxy coating. After UV aging testing, comparing to neat EP coating, the GO/EP coating experiences far less degradation in gloss, water resistance, corrosion resistance and bonding strength to steel substrates. In addition, tribological tests confirmed that GO/EP has improved wear resistance compared with neat epoxy coating and the wear rate of epoxy coating was reduced by ~30% with incorporation of only 0.1%wt GO. This study provides a promising strategy for developing durable protective coatings for practical applications.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13666659/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149182998","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":"Composition-Dependent Microwave Shielding Performance of Kaolinite/Chopped-Strand Composites for Wide Frequency Range.","authors":"Mehriban Emek","doi":"10.3390/nano16191267","DOIUrl":"10.3390/nano16191267","url":null,"abstract":"<p><p>The increasing demand for high-frequency electronic and communication systems has intensified the need for lightweight and efficient electromagnetic interference (EMI) shielding materials. In this study, the conventional oxide mixing method was used to form kaolinite-chopped strand composites. Natural kaolinite powder was calcined at 450 °C for 4 h to remove volatile and organic components before composite fabrication. Kaolinite/chopped-strand epoxy composites were fabricated and evaluated for their microwave shielding effectiveness in the 0-4.4 GHz frequency range. Composites with different kaolinite-to-chopped-strand weight ratios were prepared using a controlled mixing and molding process to obtain thin specimens with a uniform thickness of 1.4 mm. X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy were used primarily to characterize the kaolinite powder. Because composite-level mapping was not performed, the uniformity of filler dispersion is interpreted cautiously. Microwave shielding effectiveness was measured using a two-port vector network analyzer (VNA). The composite containing 80 wt.% kaolinite and 20 wt.% chopped strands showed the highest shielding performance, with a maximum total shielding effectiveness of 21.57 dB at 0.58 GHz. The observed shielding behavior is consistent with absorption-dominated attenuation supported by S-parameter-derived reflection, transmission, and absorption trends. This can arise from polarization losses and interfacial charge accumulation in heterogeneous dielectric composites. The results indicate that kaolinite/chopped-strand epoxy composites are low cost and sustainable materials for broadband microwave shielding applications.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13667123/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149183340","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}