Nano-Structures & Nano-Objects最新文献

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Investigation of heat transfer in a radiative Casson triple particle nanofluid flow with Riga plate and variable thermo-physical characteristics 具有里加板和变热物性的辐射卡森三粒子纳米流体的传热研究
IF 5.45
Nano-Structures & Nano-Objects Pub Date : 2025-05-01 DOI: 10.1016/j.nanoso.2025.101486
O. Adebisi , O.A. Ajala , A.O. Akindele , I.O. Okunade , A.D. Ohaegbue , A.A. Yahaya
{"title":"Investigation of heat transfer in a radiative Casson triple particle nanofluid flow with Riga plate and variable thermo-physical characteristics","authors":"O. Adebisi ,&nbsp;O.A. Ajala ,&nbsp;A.O. Akindele ,&nbsp;I.O. Okunade ,&nbsp;A.D. Ohaegbue ,&nbsp;A.A. Yahaya","doi":"10.1016/j.nanoso.2025.101486","DOIUrl":"10.1016/j.nanoso.2025.101486","url":null,"abstract":"<div><div>Researchers are looking into more effective ways to employ solar energy with hybrid nanofluids (HNF) due to growing industrial requirements and the desire to reduce electrical energy prices and usage. However, solar radiation is necessary for photovoltaic cells and solar-powered systems to operate effectively. Therefore, the combined effect of solar radiation and variable thermo-physical properties on Casson HNF flow through a porous plate with a modified magnetic field was considered in this study. The governing partial differential equations (PDEs) were converted to non-dimensional ordinary differential equations (ODEs) by the application of similarity transformations. With the help of MATHEMATICA 11.3 software, the Chebyshev Collocation Method (CCM) was utilized to solve the ODEs in order to accomplish the model's objectives. The results showed that triple particle nanofluids (TPNFs) had a much higher thermal efficiency than both single (SPNFs) and double particle nanofluids (DPNFs). Also the results demonstrate that higher thermal radiation and magnetic parameter greatly improve heat dispersion, providing important information for maximizing the efficiency of solar power systems.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101486"},"PeriodicalIF":5.45,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143937552","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
Electrostatic self-assembly of red phosphorus@MgAl-layered double hydroxide for improved flame retardancy in epoxy resin 环氧树脂中提高阻燃性的红色phosphorus@MgAl-layered双氢氧化物静电自组装
IF 5.45
Nano-Structures & Nano-Objects Pub Date : 2025-05-01 DOI: 10.1016/j.nanoso.2025.101482
Yongkang Zhou , Ting Xiang , Lifen Xiao , Hua Lai , Geng Huang , Wei Li , Ye-Tang Pan , Henri Vahabi
{"title":"Electrostatic self-assembly of red phosphorus@MgAl-layered double hydroxide for improved flame retardancy in epoxy resin","authors":"Yongkang Zhou ,&nbsp;Ting Xiang ,&nbsp;Lifen Xiao ,&nbsp;Hua Lai ,&nbsp;Geng Huang ,&nbsp;Wei Li ,&nbsp;Ye-Tang Pan ,&nbsp;Henri Vahabi","doi":"10.1016/j.nanoso.2025.101482","DOIUrl":"10.1016/j.nanoso.2025.101482","url":null,"abstract":"<div><div>The creation of high-performance flame retardants using a simple method is essential to align with the increasing demand for sustainable and non-toxic flame retardants. Red phosphorus (RP) was encapsulated with magnesium-aluminum-layered double hydroxides (LDHs) through electrostatic assembly to form RP@LDH composites. These composites were incorporated into epoxy resin (EP) at varying concentrations to evaluate their thermal and flammability performance. The EP composite with 7 wt% RP@LDH achieved a limiting oxygen index (LOI) of 37.5 % and a UL-94 V-0 rating. Compared to pure EP, this composite demonstrated a 16.3 % increase in carbon residue and reductions of 41.1 %, 37.9 %, and 40.8 % in peak heat release rate, total heat release, and carbon monoxide emissions, respectively. The enhancements are attributed to a protective barrier formed by LDH and RP decomposition products during combustion, which also suppress flammable by-product formation. Simultaneously enhanced the mechanical properties of EP composite materials effectively. This synergistic interaction provides valuable insights into developing advanced flame-retardant systems for polymer applications.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101482"},"PeriodicalIF":5.45,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143912771","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
The atomic and thermal performance of CuO nanoparticles/paraffin as phase change materials in a circular tube: Molecular dynamics simulation approach 纳米CuO /石蜡相变材料在圆管内的原子和热性能:分子动力学模拟方法
IF 5.45
Nano-Structures & Nano-Objects Pub Date : 2025-05-01 DOI: 10.1016/j.nanoso.2025.101492
Sabreen Q. Al-Timimy , Waqed H. Hassan , Narinderjit Singh Sawaran Singh , Ghazi Faisal Naser , Soheil Salahshour , S. Mohammad Sajadi , Maboud Hekmatifar
{"title":"The atomic and thermal performance of CuO nanoparticles/paraffin as phase change materials in a circular tube: Molecular dynamics simulation approach","authors":"Sabreen Q. Al-Timimy ,&nbsp;Waqed H. Hassan ,&nbsp;Narinderjit Singh Sawaran Singh ,&nbsp;Ghazi Faisal Naser ,&nbsp;Soheil Salahshour ,&nbsp;S. Mohammad Sajadi ,&nbsp;Maboud Hekmatifar","doi":"10.1016/j.nanoso.2025.101492","DOIUrl":"10.1016/j.nanoso.2025.101492","url":null,"abstract":"<div><h3>Background</h3><div>Using molecular dynamics simulation, this study investigates the effect of CuO nanoparticle addition on the thermodynamic and atomic properties of an octadecane that was being utilized as a phase change material within a circular tube.</div></div><div><h3>Methods</h3><div>The results indicate that the density (D) was greatest in the vicinity of the tube walls. At its peak, D was 0.0300 atoms per square centimeter. This behavior is due to the increased attractive force that is between the structure's boundaries and its particles. Particle velocity (V) values reached their utmost attainable values in the intermediate regions of the tube, where movement was greatest. At its peak, V was 0.0078 Å/fs. The tube exhibits a maximum temperature (Max T) value of 754.43 K at its midpoint.</div></div><div><h3>Significant Findings</h3><div>Due to the increased particle motion in the intermediate regions, the investigated structure experienced a greater number of collisions in those areas. After 10 ns, the sample's heat flux, thermal conductivity, and thermal stability converged to values of 3.94 W/m<sup>2</sup>, 1.38 W/mK, and 1821 K, respectively. The structure showed charging and discharging times of 6.41 and 7.15 ns, respectively.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101492"},"PeriodicalIF":5.45,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144168694","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
Nanomaterials in fire protection: Innovations for enhanced safety and durability 纳米材料在消防:创新,提高安全性和耐久性
IF 5.45
Nano-Structures & Nano-Objects Pub Date : 2025-05-01 DOI: 10.1016/j.nanoso.2025.101497
N.B. Singh , Usman Lawal Usman , Ahmed Abdala
{"title":"Nanomaterials in fire protection: Innovations for enhanced safety and durability","authors":"N.B. Singh ,&nbsp;Usman Lawal Usman ,&nbsp;Ahmed Abdala","doi":"10.1016/j.nanoso.2025.101497","DOIUrl":"10.1016/j.nanoso.2025.101497","url":null,"abstract":"<div><div>Fire hazards continue to pose serious threats to human life, infrastructure, and the environment, thereby demanding the development of advanced and effective fire protection strategies. In recent years, nanomaterials have emerged as a promising frontier in flame retardancy, owing to their superior thermal stability, high surface area, and multifunctional properties. This review provides a comprehensive overview of the application of nanomaterials—such as nanoparticles, nanotubes, nanosheets, and nanocomposites, in improving fire resistance across various sectors, including construction, electronics, textiles, and transportation. The mechanisms through which nanomaterials enhance flame retardancy include forming thermal barriers, promoting catalytic charring, and suppressing smoke and toxic gases. Nanomaterials offer enhanced efficiency, long-term durability, and reduced environmental impact compared to traditional flame retardants. Furthermore, integrating nanotechnology with smart sensors and adopting green synthesis techniques presents innovative pathways for developing sustainable and intelligent fire protection systems. Despite these advantages, challenges such as production scalability, cost-effectiveness, and regulatory compliance remain significant hurdles. Nevertheless, ongoing research and technological advancements are addressing these issues, pushing the field forward. This review critically discusses the current state of research, key benefits, existing challenges, and prospects of nanomaterials in fire protection, emphasizing their transformative potential in enhancing safety across multiple modern industries.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101497"},"PeriodicalIF":5.45,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144204312","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
The prospective contribution of kesterites to next-generation technologies kesterites对下一代技术的潜在贡献
IF 5.45
Nano-Structures & Nano-Objects Pub Date : 2025-04-25 DOI: 10.1016/j.nanoso.2025.101480
Mohammad Istiaque Hossain , Puvaneswaran Chelvanathan , Abdelmajid Salhi , Brahim Aissa
{"title":"The prospective contribution of kesterites to next-generation technologies","authors":"Mohammad Istiaque Hossain ,&nbsp;Puvaneswaran Chelvanathan ,&nbsp;Abdelmajid Salhi ,&nbsp;Brahim Aissa","doi":"10.1016/j.nanoso.2025.101480","DOIUrl":"10.1016/j.nanoso.2025.101480","url":null,"abstract":"<div><div>Kesterite-based Cu₂ZnSn(S,Se)₄ (CZTSSe) thin films have emerged as versatile and sustainable materials for a wide spectrum of next-generation technologies, including solar photovoltaics, photodetectors, sensors, thermoelectric devices, photoelectrochemical water splitting, energy storage systems (such as lithium-ion batteries and supercapacitors), and even antibacterial treatments. In the realm of photovoltaics, CZTSSe thin-film solar cells have achieved a notable power conversion efficiency of 12.6 %. This review delves into both encapsulated and non-encapsulated device structures, examining their structural stability and degradation mechanisms over time. The key advantages of CZTSSe include their earth-abundant, non-toxic composition, tunable optoelectronic properties, and compatibility with low-cost, scalable fabrication techniques. Such material has favorable empirical properties at both the nano- and micro-level, such as a tunable direct bandgap (∼1.0–1.5 eV), high absorption coefficient (&gt;10⁴ cm⁻¹), earth-abundant and non-toxic elemental composition, and potential for low thermal conductivity—traits that are especially beneficial for photovoltaic and thermoelectric applications. These features strongly align with global sustainability goals and the principles of a circular economy, particularly through reduced environmental impact and the potential for recycling. The review also addresses critical challenges related to stability, reproducibility, and ageing effects, providing insights into defect passive action, interface engineering, and compositional tuning to enhance long-term performance. Additionally, the potential of CZTSSe for material and energy storage is thoroughly explored, reinforcing the material’s promise beyond traditional photovoltaics. By presenting recent advancements, fabrication strategies, and emerging multifunctional applications, this review underscores the transformative potential of CZTSSe in shaping a sustainable technological future.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101480"},"PeriodicalIF":5.45,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143868001","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
Performance of TiO2-SiC nanomaterials on morphology and sorption behavior of PVA-PEG-based nanocomposites for UV-applications and antibacterial efficacy 二氧化钛-碳化硅纳米材料对聚乙烯醇-聚乙二醇基纳米复合材料的形貌、吸附性能及抗菌性能的影响
IF 5.45
Nano-Structures & Nano-Objects Pub Date : 2025-04-15 DOI: 10.1016/j.nanoso.2025.101479
Nawras T. Sheehab , Fouad Sh. Hashim , Ehssan Al-Bermany , Ahmed Najm Obaid , Karar Abdali , Adel H. Omran Alkhayatt
{"title":"Performance of TiO2-SiC nanomaterials on morphology and sorption behavior of PVA-PEG-based nanocomposites for UV-applications and antibacterial efficacy","authors":"Nawras T. Sheehab ,&nbsp;Fouad Sh. Hashim ,&nbsp;Ehssan Al-Bermany ,&nbsp;Ahmed Najm Obaid ,&nbsp;Karar Abdali ,&nbsp;Adel H. Omran Alkhayatt","doi":"10.1016/j.nanoso.2025.101479","DOIUrl":"10.1016/j.nanoso.2025.101479","url":null,"abstract":"<div><div>This work exhibits the incorporation of TiO<sub>2</sub>-SiC nanoparticles (NPs) for the first time via a green and cost-effective route. It examines their loading into a polymeric matrix (PM) composed of polyvinyl alcohol (PVA) and polyethylene glycol (PEG) at several weight percentages (wt%) via a casting way. The Fourier transform infrared spectroscopy (FTIR) revealed the chemical properties. Field emission scanning electron microscopy (FESEM) confirmed that the surface morphology of PM is rough and homogenous. Furthermore, the insertion of lower filler loadings of TiO<sub>2</sub>-SiC NPs was uniformly and well dispersed through the PM, reducing aggregations. It is rough and homogenous. The compositional elements were achieved using EDXs. The optical absorbance values were boosted by 85 % at a wavelength of 260 nm, decreasing the indirect bandgaps by 47.5 %, from 4.58 eV to 2.40 eV (Tauc model) and from 4.83 eV to 2.60 eV (ASF model) upon SiC ratio reaching 2.5 wt%. The AC conductivity values were improved upon loading from 3.30 × 10<sup>−9</sup> S.cm<sup>−1</sup> to 3.52 × 10<sup>−9</sup> S.cm<sup>−1</sup> at 100 Hz, and the dielectric constant was higher than PM finding with maintained low dielectric loss. The strongest activity and the greatest inhibitory zone of about 24 mm <em>Staphylococcus aureus</em> (gram-positive) appeared at a ratio of 2.5 wt% SiC. From the results obtained, these films are promising for use in UV-blocking, energy storage, and optoelectronic applications.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101479"},"PeriodicalIF":5.45,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829063","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
Photochemical and electrochemical synthesis of [rGO–AuNps] hybrids dispersions for detection of rhodamine 6G by SERS SERS检测罗丹明6G的[rGO-AuNps]杂化分散体的光化学和电化学合成
IF 5.45
Nano-Structures & Nano-Objects Pub Date : 2025-04-12 DOI: 10.1016/j.nanoso.2025.101478
Juan Martín Chierici , Federico Fioravanti , Luis A. Pérez , Gabriela I. Lacconi
{"title":"Photochemical and electrochemical synthesis of [rGO–AuNps] hybrids dispersions for detection of rhodamine 6G by SERS","authors":"Juan Martín Chierici ,&nbsp;Federico Fioravanti ,&nbsp;Luis A. Pérez ,&nbsp;Gabriela I. Lacconi","doi":"10.1016/j.nanoso.2025.101478","DOIUrl":"10.1016/j.nanoso.2025.101478","url":null,"abstract":"<div><div>Many hybrid nanomaterials with different types of metallic nanostructures have been studied for diverse applications. Herein, we present four simple experimental strategies, combining photochemical and electrochemical reduction steps to obtain aqueous dispersions of hybrid nanomaterials of reduced graphene oxide flakes (rGO) supporting gold nanoparticles (AuNps). We found clear differences in the optical, structural, and morphological characteristics of the <strong>[rGO–AuNps]</strong> hybrids due to the size, shape, and distribution of AuNps, according to the synthesis strategy employed. These characteristics are associated with the degree of reduction (C/O ratio composition) and structural defects (Raman intensity ratio between D and G bands) of the rGO formed, both features provide sites available for nucleation and growth of the nanostructures, obtained in each synthesis. The efficiency of different dispersions with plasmonic activity in the detection of rhodamine 6 G (Rh6G) from dilute aqueous solutions was spectroscopically evaluated. SERS (Surface-Enhanced Raman spectroscopy) experiments were performed directly on cellulose fibers (filter paper), previously modified with the assembly of the hybrid nanomaterials, and the Rh6G molecules. In this way, a practical and simple configuration with nanomaterials has been established, as a platform designed for the sensitive detection of adsorbed molecules, potentially useful during the filtration of contaminated water. The SERS spectra of adsorbed Rh6G on the paper membranes with the hybrids <strong>[rGO]</strong><sup><strong>hυ</strong></sup> <strong>–[AuNps]</strong><sup><strong>hυ</strong></sup> and <strong>[rGO]</strong><sup><strong>hυ</strong></sup><strong>–[AuNps]</strong><sup><strong>ec</strong></sup> for 48 h immersion, showed a 23 ± 5 and 21 ± 5 enhancement factor (EF), respectively.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101478"},"PeriodicalIF":5.45,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820820","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
Green fabrication of novel LaCeO₃ decorated with CuO using Kigelia africana (lamb) benth leaf extract for photocatalytic degradation of malachite green 利用 Kigelia africana (lamb) benth 叶提取物绿色制备新型 LaCeO₃ 并用 CuO 进行装饰,用于光催化降解孔雀石绿
IF 5.45
Nano-Structures & Nano-Objects Pub Date : 2025-04-08 DOI: 10.1016/j.nanoso.2025.101474
Rahma Demy Fitria Irbati , Dewangga Oky Bagus Apriandanu , Mike Rahayu , Vatra Reksa Ananda , Muh. Risky Yusuf , Sheela Chandren , Yoki Yulizar
{"title":"Green fabrication of novel LaCeO₃ decorated with CuO using Kigelia africana (lamb) benth leaf extract for photocatalytic degradation of malachite green","authors":"Rahma Demy Fitria Irbati ,&nbsp;Dewangga Oky Bagus Apriandanu ,&nbsp;Mike Rahayu ,&nbsp;Vatra Reksa Ananda ,&nbsp;Muh. Risky Yusuf ,&nbsp;Sheela Chandren ,&nbsp;Yoki Yulizar","doi":"10.1016/j.nanoso.2025.101474","DOIUrl":"10.1016/j.nanoso.2025.101474","url":null,"abstract":"<div><div>This study successfully synthesized a novel LaCeO<sub>3</sub>/CuO nanocomposite using a green synthesis method mediated by <em>Kigelia africana</em> leaf extract (KALE). LaCeO<sub>3</sub> is a perovskite with a significantly high band gap value between 3 and 3.19 eV. The combination with CuO, a cost-effective material that has a lower band gap of 1.2–2 eV, aims to reduce the overall band gap. This material modification will result in a heterojunction structure that boosts its photocatalytic performance. Characterization techniques such as FT-IR, UV-Vis DRS, XRD, HR-TEM, FESEM-EDX, and XPS validated the effective creation of the nanocomposite, which exhibited a unique morphology and a type S heterojunction structure. The LaCeO<sub>3</sub>/CuO nanocomposite exhibited a bandgap energy of 2.88 eV, placing it within the visible light spectrum. Experiments assessing its photocatalytic performance demonstrated that the LaCeO<sub>3</sub>/CuO nanocomposite effectively decomposed malachite green (MG) under visible light, achieving a maximum degradation efficiency of 92.88 % within 120 minutes. Kinetic investigations indicated that the reaction follows pseudo-first-order kinetics, exhibiting a rate constant of 6.19 × 10⁻² min⁻¹ . The ideal mass of the photocatalyst for the degradation of MG was found to be 30 mg. The study also investigated the influence of various factors, such as pH, the presence of anions, and the role of reactive oxygen species (ROS), affected photocatalytic activity. Results indicated that the LaCeO<sub>3</sub>/CuO nanocomposite exhibited optimal performance in neutral to mildly alkaline conditions. The presence of anions, particularly Cl⁻ and SO₄²⁻, negatively impacted photocatalytic activity. Furthermore, the LaCeO<sub>3</sub>/CuO nanocomposite demonstrated excellent reusability, maintaining high degradation efficiency over three consecutive cycles. These results emphasize the possible of the green-synthesized LaCeO<sub>3</sub>/CuO nanocomposite as a promising and sustainable photocatalyst for the effective removal of organic pollutants from wastewater.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101474"},"PeriodicalIF":5.45,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143790892","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
Reaction between Fe³⁺ and aniline in the synthesis of PANI-γFe₂O₃ and PANI-Fe₃O₄ nanocomposites: Mechanistic studies and evaluation of parameters Fe +与苯胺在合成PANI-γFe₂O₃和PANI-Fe₃O₄纳米复合材料中的反应:机理研究和参数评价
IF 5.45
Nano-Structures & Nano-Objects Pub Date : 2025-04-07 DOI: 10.1016/j.nanoso.2025.101477
A.F.N. Martins , F.B. Diniz , A.R. Rodrigues
{"title":"Reaction between Fe³⁺ and aniline in the synthesis of PANI-γFe₂O₃ and PANI-Fe₃O₄ nanocomposites: Mechanistic studies and evaluation of parameters","authors":"A.F.N. Martins ,&nbsp;F.B. Diniz ,&nbsp;A.R. Rodrigues","doi":"10.1016/j.nanoso.2025.101477","DOIUrl":"10.1016/j.nanoso.2025.101477","url":null,"abstract":"<div><div>This work presents the results of experiments with PANI-γFe₂O₃ nanocomposites, synthesized in an acidic medium at 40°C under UV irradiation (λ = 365 nm), using maghemite (γFe₂O₃) and magnetite (Fe₃O₄). X-ray diffraction revealed the evolution of the transformations of the iron oxides throughout the synthesis. At the same time, oxidation/reduction reactions of iron interacting with aniline were observed in an electrochemical cell. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed changes in particle morphology during aniline polymerization, including growth and a tendency to agglomeration after 120 minutes of reaction. Energy dispersive spectroscopy (EDS) confirmed variations in the elemental composition, reflecting the partial conversion between maghemite and magnetite and demonstrating the influence of polymerization on the final composition of the material. The results reinforce the proposed model, according to which synthesis occurs in an oscillatory manner: Fe³ ⁺ ions from maghemite are reduced to Fe²⁺ from magnetite (Fe₃O₄), which oxidizes polyaniline in the polymerization process. Subsequently, part of the Fe²⁺ ions is re-oxidized under UV irradiation, reconverting magnetite into maghemite. This study clarifies the redox mechanism responsible for the phase transformations, making it possible to optimize the structural control of these materials for applications in energy storage devices, electrochemical sensors and environmental remediation systems. The results lay a solid foundation for expanding the use of functional nanomaterials in various technological and environmental areas.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101477"},"PeriodicalIF":5.45,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785206","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
Recent development in wearable sensors for healthcare applications 用于医疗保健应用的可穿戴传感器的最新发展
IF 5.45
Nano-Structures & Nano-Objects Pub Date : 2025-04-01 DOI: 10.1016/j.nanoso.2025.101473
Fatemeh Saeedi, Reza Ansari, Mojtaba Haghgoo
{"title":"Recent development in wearable sensors for healthcare applications","authors":"Fatemeh Saeedi,&nbsp;Reza Ansari,&nbsp;Mojtaba Haghgoo","doi":"10.1016/j.nanoso.2025.101473","DOIUrl":"10.1016/j.nanoso.2025.101473","url":null,"abstract":"<div><div>Wearable sensors aid in diagnosing various diseases by using chemical, physical, and biological sensing technologies. They also make it possible to continuously and instantly monitor a patient's physiological state. Recently, the demand for sensors that track people's surroundings, fitness and health has increased. In the meantime, the production of flexible and wearable polymer sensors based on biocompatibility, biodegradability, environmentally friendly features and cost-effectiveness has created a significant evolution in the wearable sensor industry. In this review, the most recent researches conducted in the direction of the construction of wearable sensors in different fields including physical, optical, chemical, biochemical and the working mechanism of these sensors have been reviewed. Assisting researchers in selecting the most appropriate selective and sensitive sensor is a key objective of this review. In addition, the applications of these sensors were classified into different categories and discussed in fields such as health care and remote welfare. In general, improving personal health care and monitoring their performance using wearable electrochemical and biosensor technologies have a significant impact on people's daily lives.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101473"},"PeriodicalIF":5.45,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739974","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
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