Nano-Structures & Nano-Objects最新文献_第5页

Electrical transport & dielectric properties of hard/soft CoFe2O4@NiAlxFe2-xO4 (x ≤ 0.20) nanocomposites 硬/软纳米复合材料CoFe2O4@NiAlxFe2-xO4 （x ≤ 0.20）的电输运和介电性能

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2026-05-01 Epub Date: 2026-05-25 DOI: 10.1016/j.nanoso.2026.101700

B. Ünal , M.A. Almessiere , A. Baykal , A. Demir Korkmaz , Y.M. Altintaş

{"title":"Electrical transport & dielectric properties of hard/soft CoFe2O4@NiAlxFe2-xO4 (x ≤ 0.20) nanocomposites","authors":"B. Ünal , M.A. Almessiere , A. Baykal , A. Demir Korkmaz , Y.M. Altintaş","doi":"10.1016/j.nanoso.2026.101700","DOIUrl":"10.1016/j.nanoso.2026.101700","url":null,"abstract":"<div><div>Hard/soft CoFe<sub>2</sub>O<sub>4</sub>@NiAl<sub>x</sub>Fe<sub>2-x</sub>O<sub>4</sub> (0.00, 0.02, 0.04, 0.06, 0.08, 0.10, 0.15, 0.20) nanocomposites (H/S CFO@Al→NFO (x ≤ 0.20) NCs) were produced via Sol gel route. The structural, morphological and composition analyses were carried out using XRD, TEM, HR-TEM, SEM along with EDX respectively and the electrical/dielectric features are elucidated in the light of these results. The dielectric and electrical features of products were systematically studied to understand how Al³⁺ ion substitution affects charge transport, polarization mechanisms, and relaxation dynamics. It is evident that AC conductivity (σ<sub>AC</sub>) displayed strong dependence on frequency (<em>f</em>) and temperature (<em>T)</em>, aligning with thermally activated small-polaron hopping. It was found that moderate levels of substitution (say, x = 0.02 – 0.06) increased conductivity due to cation redistribution and local structural distortion, while higher substitution levels (x ≥ 0.08) decreased σ<sub>AC</sub> due to dilution of Fe²⁺/Fe³⁺ hopping centers. It is interesting that DC conductivity (σ<sub>DC</sub>) tracked Arrhenius behavior, with activation energy (<em>E</em><sub><em>A</em></sub>) rising to about 406 meV for 0.08 ≤ x ≤ 0.15, then sharply dropping to 267 meV at x = 0.20, indicating structural relaxation and the reopening of alternative conduction pathways. Dielectric constant (ε<sub>r</sub>′) and loss (ε<sub>r</sub>″) both showed significant dispersion influenced by Maxwell–Wagner (M-W) polarization and thermally activated hopping process, with Al³⁺ ion substitution notably affecting interfacial polarization strength. Furthermore, both impedance spectroscopy and electric modulus confirmed non-Debye relaxation, with <em>T</em> -driven shifts towards higher frequencies and substitution-driven evolution from grain-boundary-dominated to grain-controlled conduction.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101700"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148184315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nitric-oxidized carbon nanomaterial for thorium(IV) removal from acidic water: Kinetics, isotherms, thermodynamics, and regeneration 用于从酸性水中去除钍（IV）的氮氧化碳纳米材料：动力学，等温线，热力学和再生

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2026-05-01 DOI: 10.1016/j.nanoso.2026.101656

Akram I. Abu Shawer , Omar A. Alnasra , Fawwaz I. Khalili , Ehab A. Hamzeh , Yara A. Abu Shawar , Amro F. Khalili , Jafar M. Aljaafreh , Randa M. Abu Kariem

{"title":"Nitric-oxidized carbon nanomaterial for thorium(IV) removal from acidic water: Kinetics, isotherms, thermodynamics, and regeneration","authors":"Akram I. Abu Shawer , Omar A. Alnasra , Fawwaz I. Khalili , Ehab A. Hamzeh , Yara A. Abu Shawar , Amro F. Khalili , Jafar M. Aljaafreh , Randa M. Abu Kariem","doi":"10.1016/j.nanoso.2026.101656","DOIUrl":"10.1016/j.nanoso.2026.101656","url":null,"abstract":"<div><div>Nanoporous carbons derived from olive pomace were evaluated as thorium(IV) sorbents under mildly acidic conditions (pH 4), comparing the parent biochar with its nitric-acid–oxidized analogue (Bio-N). Multiscale characterization (gas sorption, X-ray diffraction, and vibrational spectroscopy) showed that oxidation increased Brunauer–Emmett–Teller (BET) surface area and pore volume and elevated cation-exchange capacity while preserving particle size, thereby enriching accessible oxygen-donor nanodomains for metal coordination. Batch uptake followed the pseudo-second-order (PSO) kinetic model (R² = 0.999), with experimental capacities of 118–124 mg g⁻¹ for biochar and 544–580 mg g⁻¹ for Bio-N across 25–45 °C. Langmuir analysis at 25 °C yielded apparent monolayer capacities of 135 and 1000 mg g⁻¹ , respectively. Equilibrium fits (Freundlich, Dubinin–Radushkevich, Temkin) and thermodynamic parameters indicated spontaneous, endothermic adsorption with more negative Gibbs free energy at higher temperature and large positive entropy, consistent with partial desolvation within nanoconfined, oxygenated pores (ΔH° = 7.2 vs 89.5 kJ mol⁻¹; ΔS° = 59.8 vs 326.7 J mol⁻¹ K⁻¹ for biochar vs Bio-N). Short fixed-bed trials achieved quantitative removal, and nitric-acid regeneration was effective: increasing HNO₃ from 0.1 to 1.0 mol L⁻¹ raised early-fraction cumulative desorption from 86 to 90% to 98–100%. Overall, nitric-acid oxidation confers strong capacity and temperature leverage, while the parent material offers robust, reusable performance — together providing a low-cost, locally sourced nanocarbon platform for radionuclide polishing and efficient single-pass column operation.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101656"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147798013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fluorescent nickel ion doped carbon dots from Withania somnifera for dye degradation, bio-imaging, hydrogen peroxide sensing and ctDNA binding studies 镍离子掺杂碳点荧光染料降解、生物成像、过氧化氢传感和ctDNA结合研究

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2026-05-01 Epub Date: 2026-05-11 DOI: 10.1016/j.nanoso.2026.101688

Kirubaharan Daphne Jacinth Gracia , Seth Sheeba Thavamani , Rajendran Muthukumar Sivaraman , Thomas Peter Amaladhas

{"title":"Fluorescent nickel ion doped carbon dots from Withania somnifera for dye degradation, bio-imaging, hydrogen peroxide sensing and ctDNA binding studies","authors":"Kirubaharan Daphne Jacinth Gracia , Seth Sheeba Thavamani , Rajendran Muthukumar Sivaraman , Thomas Peter Amaladhas","doi":"10.1016/j.nanoso.2026.101688","DOIUrl":"10.1016/j.nanoso.2026.101688","url":null,"abstract":"<div><div>The current work focuses on the synthesis, characterization of nickel, nitrogen doped carbon dots (Ni-NCDs) from <em>Withania somnifera</em> and their applications as photocatalyst to degrade methyl orange, DNA binding agent, biomarkers for SKMEL cells and electrochemical hydrogen peroxide sensor. The electronic properties, surface functionalities, morphology, elemental constituents and bonding nature of the synthesized Ni-NCDs were characterized with UV-Visible spectroscopy, fluorescence spectroscopy, Fourier Transform Infra Red spectroscopy, X-ray Photoelectron Spectroscopy, High Resolution Transmission Electron Microscopy, EDX and Raman spectroscopy. The Ni-NCDs exhibited an average particle size of about 2.29 nm with a quantum yield of 38%. The synthesized Ni-NCDs served as an effective photocatalyst for methyl orange dye degradation under UV light irradiation with 98.2% efficiency in 60 min at pH 3.4. The degradation followed pseudo first order kinetics with a rate constant of 5.67 × 10<sup>−2</sup> min<sup>−1</sup>. The intercalative binding interaction between the Ni-NCDs and ctDNA quantified with Benesi-Hildebrand plot was calculated to be 15.0 (mg/mL)<sup>−1</sup>. The excellent reducing ability of the Ni-NCDs was extended to electrochemically sense hydrogen peroxide with a detection limit of 7.65 × 10<sup>−5</sup> M. The excellent biocompatible nature of Ni-NCDs was confirmed with MTT assay, as the cell viability towards skin cancer SKMEL cells was 47.22%. The fluorescent Ni-NCDs further acted as fluorescent biomarkers for SKMEL cells.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101688"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147951070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photocatalytic degradation of Rhodamine 6 G dye and antibacterial study by using Chitosan/Ga2O3/WO3 nanocomposite 壳聚糖/Ga2O3/WO3纳米复合材料光催化降解罗丹明6 G染料及抗菌研究

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2026-05-01 Epub Date: 2026-06-01 DOI: 10.1016/j.nanoso.2026.101704

V. Subha , D. Thillaikkarasi , M. Jothi , M. Nagoor Meeran , S. Jagan Raj

{"title":"Photocatalytic degradation of Rhodamine 6 G dye and antibacterial study by using Chitosan/Ga2O3/WO3 nanocomposite","authors":"V. Subha , D. Thillaikkarasi , M. Jothi , M. Nagoor Meeran , S. Jagan Raj","doi":"10.1016/j.nanoso.2026.101704","DOIUrl":"10.1016/j.nanoso.2026.101704","url":null,"abstract":"<div><div>This study effectively constructed Chitosan@Ga<sub>2</sub>O<sub>3</sub>/WO<sub>3</sub> ternary nanocomposites by solution assisted precipitation and performed comprehensive characterization. The composite was utilized for the photocatalytic degradation of Rhodamine 6 G dye under ultraviolet light irradiation. The natural biopolymer chitosan acted as a stabilizing agent, promoting the production of efficient heterojunctions between Ga<sub>2</sub>O<sub>3</sub> and WO₃. The combination demonstrated superior photocatalytic efficacy owing to higher charge separation, increased light absorption, and a decreased band gap. The optimization of parameters including pH, dye concentration, catalyst dosage, and sacrificial agents resulted in a peak degradation efficiency of 96% after 120 min. Studies on reactive species trapping corroborated the suggested process, while reusability assessments validated catalyst stability across five cycles. Additionally, antibacterial experiments revealed concentration-dependent suppression of Pseudomonas aeruginosa and Bacillus cereus, underscoring the material's dual activity in pollution removal and microbial disinfection.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101704"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148184123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanofluids as game-changers for sustainable energy systems: Enhancing efficiency and reducing carbon footprints 纳米流体作为可持续能源系统的变革者：提高效率和减少碳足迹

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2026-05-01 Epub Date: 2026-05-04 DOI: 10.1016/j.nanoso.2026.101677

Ilancheliyan Samylingam , Kumaran Kadirgama , Lingenthiran Samylingam , Navid Aslfattahi , Chee Kuang Kok , Mohd Fairusham Ghazali , Maryam Sadat Kiai

{"title":"Nanofluids as game-changers for sustainable energy systems: Enhancing efficiency and reducing carbon footprints","authors":"Ilancheliyan Samylingam , Kumaran Kadirgama , Lingenthiran Samylingam , Navid Aslfattahi , Chee Kuang Kok , Mohd Fairusham Ghazali , Maryam Sadat Kiai","doi":"10.1016/j.nanoso.2026.101677","DOIUrl":"10.1016/j.nanoso.2026.101677","url":null,"abstract":"<div><div>The increasing demand for sustainable, energy-efficient systems has driven interest in advanced heat transfer fluids that have overcome the limitations of conventional working media. Nanofluids have shown considerable potential due to their enhanced thermophysical properties; however, practical deployment is constrained by stability, environmental impact, economic feasibility, and scalability challenges. This review aims to critically synthesize recent research on nanofluids for sustainable energy systems from a system-level and interdisciplinary perspective. A comprehensive review methodology is adopted, integrating experimental, numerical, and analytical studies of nanoparticle materials, base fluids, preparation methods, and applications, along with insights from life-cycle analysis, toxicity assessment, techno-economic evaluation, and scalability considerations. The findings indicate that although efficiency improvements of 10–30% are frequently reported, these gains are highly dependent on experimental conditions and system configuration and may not directly translate into real-world applications. Carbon-based and hybrid nanofluids exhibit strong performance at low concentrations, while bio-based formulations offer more sustainable pathways. The review is relevant to photovoltaic/thermal systems, wind turbine cooling, geothermal energy extraction, and industrial waste heat recovery.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101677"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147849703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transethosomes: A novel lipid nanocarrier for enhanced skin penetration in drug delivery systems transsethosomes：一种新型脂质纳米载体，可在药物输送系统中增强皮肤渗透

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2026-05-01 Epub Date: 2026-05-04 DOI: 10.1016/j.nanoso.2026.101671

Vishakha Desai, Suma Naduvinamai, Sanket Gawade, Nagesh C

引用次数: 0

Green-synthesised Cu-doped cobalt ferrite nanoparticles using Azadirachta indica leaf extract for photocatalytic and antibacterial applications 绿色合成的铜掺杂钴铁氧体纳米粒子利用印楝叶提取物光催化和抗菌应用

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2026-05-01 Epub Date: 2026-05-06 DOI: 10.1016/j.nanoso.2026.101662

Arti Rao , Preeti Thakur , Atul Thakur

{"title":"Green-synthesised Cu-doped cobalt ferrite nanoparticles using Azadirachta indica leaf extract for photocatalytic and antibacterial applications","authors":"Arti Rao , Preeti Thakur , Atul Thakur","doi":"10.1016/j.nanoso.2026.101662","DOIUrl":"10.1016/j.nanoso.2026.101662","url":null,"abstract":"<div><div>Copper-doped cobalt ferrite nanoparticles, Co<sub>(1-x)</sub>Cu<sub>x</sub>Fe<sub>2</sub>O<sub>4</sub> (x = 0.0–0.9), were successfully synthesised via a green sol-gel technique using <em>Azadirachta indica</em> leaf extract. The X-ray diffraction (XRD) analysis confirmed the formation of a single-phase cubic spinel structure, with crystallite sizes ranging from 12 to 31 nm. Structural and physicochemical properties were analysed using XRD, SEM, FTIR, Raman spectroscopy, DLS and VSM. The incorporation of copper significantly impacted the structural, magnetic, and catalytic properties. Among the various compositions, the sample with x = 0.5 exhibited enhanced photocatalytic performance with faster reaction kinetics, 97% degradation of Eosin Y (EY) under visible light irradiation. Antibacterial studies revealed enhanced activity against Escherichia coli and Staphylococcus aureus, with compositions in the range of x = 0.3–0.5 showing the highest inhibition efficiency. The improved performance is attributed to effective charge separation, increased defect density, and enhanced generation of reactive oxygen species (ROS). These findings highlight the potential of green-synthesised Cu-doped CoFe₂O₄ nanoparticles as efficient multifunctional materials for environmental remediation and antimicrobial applications.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101662"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147850279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient fluoride capture by Mg–Zr–Al trimetallic oxide nanocomposites: Synthesis, calcination effects, and performance Mg-Zr-Al三金属氧化物纳米复合材料的高效氟捕获：合成、煅烧效果和性能

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2026-05-01 Epub Date: 2026-05-18 DOI: 10.1016/j.nanoso.2026.101692

Supriya Mandal, Bholanath Panda, Debasish Mondal, Julekha Khatun, Satyan Karmakar, Debasis Dhak

{"title":"Efficient fluoride capture by Mg–Zr–Al trimetallic oxide nanocomposites: Synthesis, calcination effects, and performance","authors":"Supriya Mandal, Bholanath Panda, Debasish Mondal, Julekha Khatun, Satyan Karmakar, Debasis Dhak","doi":"10.1016/j.nanoso.2026.101692","DOIUrl":"10.1016/j.nanoso.2026.101692","url":null,"abstract":"<div><div>Trimetallic magnesium–zirconium–aluminium mixed metal oxide (MZAO) nanocomposites were synthesised via a solution combustion route and calcined at 500 °C, 600 °C, and 700 °C to elucidate the influence of thermal treatment on fluoride adsorption. The samples were abbreviated as MZAO-500, MZAO-600, and MZAO-700 respectively. Calcination temperature played a decisive role in regulating surface hydroxyl density, surface charge, and the combined interaction among Mg, Zr, and Al active sites. Lower calcination temperature (MZAO-500) preserved a higher density of surface hydroxyl groups and a more favourable positive surface charge, as evidenced by zeta potential analysis, thereby enhancing electrostatic attraction and ion-exchange interactions with fluoride ions. Consequently, MZAO-500 exhibited superior adsorption performance. As estimated from the Langmuir model the maximum fluoride uptake capacities of MZAO-500, MZAO-600, and MZAO-700 58.37, 36.27, and 24.11 mg/g respectively. Equilibrium data were better described by the Freundlich isotherm, indicating heterogeneous adsorption arising from likely distributed surface sites. Adsorption kinetics followed a pseudo-second-order model, suggesting chemisorption-dominated fluoride capture. Thermogravimetric analysis confirmed excellent thermal stability of the nanocomposites above 800 °C. Efficient fluoride removal was achieved within a pH range of 5–8, with high selectivity retained in the presence of competing anions such as chloride, sulphate, and nitrate. X-ray photoelectron spectroscopy supporting the adsorption mechanism governed by surface hydroxyl group and electrostatic effects. These findings demonstrate that calcination-driven tuning of surface chemistry is critical for maximizing the fluoride adsorption efficiency of trimetallic oxide nanocomposites.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101692"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147991676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Increasing visible-light photoactivity of TiO₂ by bio-inspired cerium incorporation into the crystal lattice 通过在晶格中掺入仿生铈来提高tio2的可见光活性

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2026-05-01 Epub Date: 2026-05-23 DOI: 10.1016/j.nanoso.2026.101696

Parmeshwar Lal Meena , Ajay Kumar Surela , Manisha Kumhar , Reena Yadav , Hari Ram Dhanetia

{"title":"Increasing visible-light photoactivity of TiO₂ by bio-inspired cerium incorporation into the crystal lattice","authors":"Parmeshwar Lal Meena , Ajay Kumar Surela , Manisha Kumhar , Reena Yadav , Hari Ram Dhanetia","doi":"10.1016/j.nanoso.2026.101696","DOIUrl":"10.1016/j.nanoso.2026.101696","url":null,"abstract":"<div><div>Ce-doped TiO₂ nanophotocatalysts were successfully synthesized via a green route using <em>Leucaena leucocephala</em> leaf extract to enhance visible-light photocatalytic activity. XRD analysis confirmed the anatase phase of TiO₂, while peak shifts toward higher 2θ values and peak broadening after Ce incorporation indicated lattice distortion, microstrain, and suppressed crystallite growth. Crystallite size calculated using the Scherrer and Williamson–Hall methods showed a significant reduction for Ce-doped TiO₂, confirming dopant-induced lattice perturbation. FTIR spectra revealed characteristic Ti–O–Ti vibrations along with Ce–O-related bands, broad O–H stretching, and phytochemical-derived functional groups, demonstrating the role of the leaf extract as a natural capping and stabilizing agent. UV–Vis studies showed enhanced visible-light absorption and band-gap narrowing from 3.32 eV for pristine TiO₂ to 3.17 eV for Ce-doped TiO₂ due to Ce-induced defect states and improved charge separation. Under visible-light irradiation, Ce-doped TiO₂ exhibited superior photocatalytic performance, achieving 93.42% degradation of methylene blue within 160 min, compared to 40.82% for pure TiO₂. The pseudo-first-order rate constant increased to 0.01579 min⁻¹ . These findings demonstrate that green-synthesized Ce-doped TiO₂ possesses enhanced light-harvesting ability, efficient charge separation, and improved surface reactivity, making it a sustainable and efficient photocatalyst for visible-light-driven dye degradation.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101696"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147991770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistic genomic effects of zinc oxide and copper oxide nanoparticles conjugated with nisin on Staphylococcus aureus 氧化锌和氧化铜纳米颗粒结合乳酸链球菌素对金黄色葡萄球菌的协同基因组效应

IF 5.45

Nano-Structures & Nano-Objects Pub Date : 2026-05-01 Epub Date: 2026-05-09 DOI: 10.1016/j.nanoso.2026.101661

Parisa Hosseini, Simin Rashidi, Bahram Golestani Eimani

{"title":"Synergistic genomic effects of zinc oxide and copper oxide nanoparticles conjugated with nisin on Staphylococcus aureus","authors":"Parisa Hosseini, Simin Rashidi, Bahram Golestani Eimani","doi":"10.1016/j.nanoso.2026.101661","DOIUrl":"10.1016/j.nanoso.2026.101661","url":null,"abstract":"<div><div>The global escalation of antimicrobial resistance has significantly compromised the effectiveness of traditional antibiotics, creating an urgent need for innovative and reliable antimicrobial strategies. Advances in nanobiotechnology have highlighted metal oxide nanoparticles, particularly zinc oxide (ZnO) and copper oxide nanoparticles (CuO NPs), as economically viable materials with notable antibacterial activity. In this work, the antimicrobial efficacy of ZnO NPs, CuO NPs, nisin, and zinc oxide and copper oxide nanoparticles conjugated with nisin was assessed against <em>Staphylococcus aureus (S. aureus)</em>. Bacterial cultures were exposed to varying concentrations (25, 50, 100, and <span><math><mrow><mn>150</mn><mspace></mspace><mi>μ</mi><mi>g</mi></mrow></math></span>/mL) across multiple incubation periods (2, 4, 6, 8, and 24 h). Genetic responses were evaluated using RAPD–PCR analysis, and the resulting banding patterns were quantified through Dice similarity coefficients followed by UPGMA clustering using NTSYS–PC software. The results demonstrated that CuO, ZnO NPs, and nisin individually inhibited bacterial growth; however, zinc oxide nanoparticles conjugated with nisin (ZnO–nisin) and copper oxide nanoparticles conjugated with nisin (CuO–nisin) exhibited substantially enhanced antibacterial performance. Notably, ZnO–nisin and CuO–nisin induced fewer detectable genomic alterations in <em>S. aureus</em>, suggesting a lower mutagenic impact while maintaining strong antimicrobial activity. Overall, these findings indicate that nisin-functionalized metal oxide nanoparticles combine high antibacterial efficacy with improved biocompatibility, positioning them as promising candidates for next-generation antimicrobial applications aimed at combating antibiotic-resistant pathogens.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"46 ","pages":"Article 101661"},"PeriodicalIF":5.45,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147850273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0