Nano-Structures & Nano-Objects最新文献

{"title":"Design and energy storage behavior of conductive polymer-nickel ferrite nanocomposites","authors":"Süleyman Kerli ,&nbsp;Ali Kemal Soğuksu ,&nbsp;Ümit Alver","doi":"10.1016/j.nanoso.2025.101520","DOIUrl":"10.1016/j.nanoso.2025.101520","url":null,"abstract":"<div><div>In this study, a new composite material was developed by coating polyaniline (PANI) onto hydrothermally synthesized nickel ferrite via oxidative polymerization. Structural and chemical properties were characterized using XRD, SEM, XPS, and FTIR. XRD confirmed the crystalline phases, while SEM revealed the surface morphology. XPS demonstrated successful incorporation into PANI, particularly by determining the oxidation states of Ni and Fe. FTIR evaluated the bonding between the components. Electrochemical performance was investigated using CV tests at scan rates of 10–100 mV s⁻¹ and GCD tests at current densities of 20–80 mA cm⁻². The annealed nickel ferrite-PANI composite exhibited a high areal capacitance of 17.76 F.cm⁻² at 20 mA cm⁻². It also demonstrated good rate capability and cycling stability. EIS analysis revealed that this electrode has a low impedance, particularly in the low-frequency region, allowing for faster charge transfer and ion diffusion. In conclusion, the combination of heat-treated nickel ferrite and conductive PANI creates an electrode material with superior energy storage properties.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"43 ","pages":"Article 101520"},"PeriodicalIF":5.45,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704050","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}

{"title":"Solvothermal synthesis of CZTS nano-structure based-electrospun PAN nanofibers impact on characterizations and antibacterial activity","authors":"Ahmed I. Abdelamir,&nbsp;Fouad Sh. Hashim","doi":"10.1016/j.nanoso.2025.101517","DOIUrl":"10.1016/j.nanoso.2025.101517","url":null,"abstract":"<div><div>The study focused on the solvothermal approach to synthesize Cu₂ZnSnS₄ (CZTS) nanoparticles (NPs) with an average particle size of 50 nm. At the same time, the composite nanofibers were fabricated from PAN-CZTS using the electrospinning method. XRD analysis confirmed the formation of the kesterite CZTS phase, while the functional groups revealed the chemical properties of the as-prepared samples via FTIR analysis. The FESEM images of CZTS indicated the appearance of quasi-spherical and nanoworm shapes, also a uniform nanofiber from PAN and PAN-CZTS with average diameters, descending order from 145 to 127 nm. The EDXs showed the compositional elements for as prepared samples. The TEM image proved the inclusion of CZTS NPs within polymer matrix. The significant highest absorption of CZTS is exhibited in the Vis region at about 400 nm, while at 260 nm in the UV region for nanocomposites, which makes it suitable applications in optoelectronic. Additionally, the values of the indirect optical band gap (<span><math><mrow><msubsup><mrow><mi>E</mi></mrow><mrow><mi>g indir</mi><mo>.</mo></mrow><mrow><mi>opt</mi></mrow></msubsup><mo>)</mo></mrow></math></span> decreased from 3.6 to 2.6 eV using the Tauc model and confirmed by the imaginary dielectric constant <span><math><mrow><msubsup><mrow><mspace></mspace><mo>(</mo><mi>E</mi></mrow><mrow><mi>g</mi></mrow><mrow><mi>ε</mi><mi>i</mi></mrow></msubsup><mo>)</mo></mrow></math></span>. The high real dielectric constant and low imaginary dielectric constant values displayed that the prepared films can be used in the manufacture of optical energy storage devices. Furthermore, the CZTS-encapsulated PAN nanofiber demonstrated notable antibacterial activity against four bacterial strains, with maximum inhibition zones (23 ± 1.25 mm) for <em>Staphylococcus aureus.</em> This makes it useful in the medical field.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"43 ","pages":"Article 101517"},"PeriodicalIF":5.45,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144663660","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}

{"title":"Polyphosphazene frameworks for sustainable applications in adsorption, flame retardancy and electrochemistry","authors":"Zahid Ali ,&nbsp;Abdul Majid Khan ,&nbsp;Muhammad Asim Mushtaq ,&nbsp;Liu Wei ,&nbsp;William W. Yu ,&nbsp;Zhanpeng Wu","doi":"10.1016/j.nanoso.2025.101518","DOIUrl":"10.1016/j.nanoso.2025.101518","url":null,"abstract":"<div><div>Polyphosphazenes (PPZ) and their derivatives have grasped the immense desirability of scientists predominantly due to their exceptional physico-chemical properties, such as chain flexibility, increased thermal stability, and high flame resistance. Substantial developments have been achieved with the exploration of new functionalities, including surface-responsive groups, topological, and morphological features. In this review, we present historical developments and the role of PPZ derivatives in achieving the Sustainable Development Goals (SDGs) for viable developments. We provide a basic classification of PPZ-based materials, focusing on their morphologies and the tunability of these morphologies to targeted dimensions. Additionally, the progress in the structural development of PPZ and their derivatives with covalent organic frameworks (COFs), metal-organic frameworks (MOFs), and covalent organic-inorganic frameworks (COIFs) has been discussed. Furthermore, we discussed the role of surface morphologies and surface area of PPZ-based materials for the adsorptive removal of toxic dye and heavy metals. Additionally, we summarize the applications of PPZ-based materials, including adsorption, heat shielding, and electrochemical applications (such as energy production and energy storage).</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"43 ","pages":"Article 101518"},"PeriodicalIF":5.45,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144656196","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}

{"title":"Advanced miRNA-nanoparticle strategies for brain cancer treatment: Bypass the blood-brain barrier for efficient treatment","authors":"Shivam Rajput ,&nbsp;Rishabha Malviya ,&nbsp;Sathvik Belagodu Sridhar ,&nbsp;Tarun Wadhwa ,&nbsp;Javedh Shareef ,&nbsp;Anjali Rana","doi":"10.1016/j.nanoso.2025.101516","DOIUrl":"10.1016/j.nanoso.2025.101516","url":null,"abstract":"<div><div>The most aggressive form of brain cancer, glioblastoma, continues to pose a substantial therapeutic challenge as a result of its invasive character and poor prognosis. The median survival rate rarely exceeds 16 months. Treatment is made more difficult by the blood-brain barrier (BBB), which prevents drugs from reaching the brain. Despite improvements in medical and surgical techniques, there are still no reliable biomarkers for early diagnosis and prognosis, and new treatment alternatives such as immune checkpoint inhibitors have not yet received approval. MicroRNAs (miRNAs) have emerged as attractive candidates for glioblastoma detection and therapy, considering their crucial role in cancer progression and their ability to cross the cerebrospinal fluid and blood. Recent developments in miRNA-based therapeutics, including miRNA mimics and inhibitors, have demonstrated potential in clinical studies. However, difficulties like as degradation, transient expression, and poor targeting restrict their clinical applicability. Nanoparticles (NPs) offer a potential technique to increase miRNA stability and targeted delivery, effectively overcoming BBB restrictions. The article addresses the specific features of NPs based miRNA delivery that promote BBB penetration, the mechanisms of NP transport, and the development of theranostic nanoplatforms for precision glioblastoma diagnosis and therapy. Furthermore, the newest breakthroughs in miRNA nanoformulations are highlighted, showing their potential to change glioblastoma treatment.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"43 ","pages":"Article 101516"},"PeriodicalIF":5.45,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144656273","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}

{"title":"Thermal-flow characteristics of an Ellis hybrid nanofluid containing polytetrafluoroethylene-SWCNTs over a stretching/shrinking cylinder with slip effect","authors":"Ashish Mishra ,&nbsp;Gunjan Pathak","doi":"10.1016/j.nanoso.2025.101515","DOIUrl":"10.1016/j.nanoso.2025.101515","url":null,"abstract":"<div><div>Hybrid nanofluids containing polytetrafluoroethylene (PTFE) nanoparticles and single-walled carbon nanotubes (SWCNTs) in a H₂O–carboxymethyl cellulose (CMC) medium, using Ellis fluid model, exhibit excellent thermal conductivity and enhanced viscosity. These enhanced properties make them ideal for applications in thermal management systems, medical technologies, tribology, and sustainable energy solutions, highlighting their potential for improved performance and efficiency. This study focuses on analyzing the characteristics of Ellis hybrid nanofluid flow along a stretching or shrinking cylinder, considering the combined impacts of thermal radiation, slip, magnetic field, and suction/blowing. A mathematical model is developed using partial differential equations, which are converted into dimensionless ODEs via similarity transformations. These expressions are then solved numerically with the aid of the bvp4c solver. Graphical representations are utilized to examine the effects of key factors on the velocity and temperature profiles, as well as on the skin friction coefficient and the local Nusselt number. The results show that the curvature parameter, Ellis fluid parameter, and stretching/shrinking parameter enhance flow, while Forchheimer number, porosity, slip, and suction/blowing parameters reduce it. Also, an upsurge in Eckert number, magnetic and radiation parameters enhance temperature, while higher porosity and velocity slip reduce it. Moreover, an increase in curvature parameter reduces the absolute value of the skin friction coefficient, along with rises in velocity slip and shrinking parameters.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"43 ","pages":"Article 101515"},"PeriodicalIF":5.45,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614123","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}

{"title":"Esterified cellulose-based quasi-solid electrolyte assembly for potential application in efficient dye-sensitized solar cell","authors":"Maneesh Kumar ,&nbsp;Praveen K. Surolia ,&nbsp;Gayatri Prasad","doi":"10.1016/j.nanoso.2025.101514","DOIUrl":"10.1016/j.nanoso.2025.101514","url":null,"abstract":"<div><div>This study explores the development of a quasi-solid electrolyte assembly using cellulose and phthalated cellulose for dye-sensitized solar cells (DSSC). The fabricated DSSC, incorporating phthalated cellulose, an ionic liquid ([Bmim]I), and an I₃⁻/I⁻ redox shuttle, achieved a photo-conversion efficiency of 5.86 % under a light intensity of 100 mW·cm⁻². It is a noteworthy improvement over most other quasi-solid-state systems, typically with the performance in the range of ∼4.5–5.2 %, underlining it potential for designing energy devices using sustainability. The enhanced efficiency of this quasi-solid-state DSSC is attributed to improved ionic conductivity, resulting from the increased oxygen atoms in the grafted cellulose. These oxygen atoms interact with cationic moieties, facilitating a hopping mechanism that allows free anionic moieties to drive the redox couple. This research highlights the potential of biopolymer-based quasi-solid electrolytes, paving the way for sustainable, green photoconversion in DSSC technology.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"43 ","pages":"Article 101514"},"PeriodicalIF":5.45,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144588059","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}

{"title":"Biogenic silver nanoparticles synthesized from Smilax glabra root extract: A green approach with antimicrobial properties","authors":"Mai Phuong Nguyen Thi ,&nbsp;Thuy Duong Le Thi ,&nbsp;Tri Thien Vu ,&nbsp;Bich Thuy Ly Thi ,&nbsp;Hoai Bac Vo ,&nbsp;Van Quyen Dong ,&nbsp;Duong Duc La","doi":"10.1016/j.nanoso.2025.101513","DOIUrl":"10.1016/j.nanoso.2025.101513","url":null,"abstract":"<div><div>Silver nanoparticles (AgNPs) have garnered significant research interest and practical applications due to their unique physicochemical properties such as high electrical and thermal conductivity, enhanced surface Raman scattering, chemical stability, catalytic activity and, most notably, strong antibacterial, antifungal, and antiviral effects. Among the methods for AgNP synthesis, green synthesis using plant extracts is of particular interest because of its stability, sustainability, strongbiological activity, safety and environmental friendliness. This work presented the novel data on synthesis of the AgNPs using the <em>Smilax glabra</em> Roxb root extract. The fabricated AgNPs were characterized using scanning electron microscopy, X-ray diffraction, energy diffractive spectroscopy, and fourier-transform infrared spectroscopy. The anti-bacterial activity against bacterial pathogens, including antibiotic susceptible and resistant <em>Staphylococcus aureus</em>, <em>Escherichia coli</em> and <em>Streptococcus mutans,</em> was examined using agar diffusion and spectrophotometric methods at A₇₀₀. The local toxicity of AgNPs was evaluatedin rabbits. The results showed that AgNPs had uniform distribution and spherical shape with the particle size in ranging from 20 to 50 nm. The nanoparticles exhibited antibacterialactivity against all tested microorganisms, including <em>S</em>. <em>aureus</em> ATCC 25923 (antibiotic- susceptible strain), antibiotic-resistant <em>S. aureus</em> strains ATCC 29213, ATCC 12493, 252, <em>E. coli</em> 25922 and dental caries bacterium <em>S. mutans</em> GS-5. Remarkably, no local toxicity of AgNPs was detected in the tested rabbits. Thus, the obtained data support the applications of these AgNPs in practice, such as in oral health care or dermal products.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"43 ","pages":"Article 101513"},"PeriodicalIF":5.45,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144548536","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}

{"title":"Synergistic ultrasound and microwave synthesis of WO3 nanostructures for dielectric and supercapacitor performance","authors":"P. Periasamy ,&nbsp;Shalini Packiam Kamala ,&nbsp;V.P. Devarajan ,&nbsp;T. Krishnakumar ,&nbsp;P. Sakthivel","doi":"10.1016/j.nanoso.2025.101512","DOIUrl":"10.1016/j.nanoso.2025.101512","url":null,"abstract":"<div><div>Microwave and ultrasound irradiation are two non-conventional types of energy that have been used to advance the field of inorganic nanomaterial synthesis, as these sources enable the production of enhanced synthetic efficacies, as well as environmental friendliness. In this study, we describe how we created WO₃ nanostructures using a new method that combines ultrasound and microwave energy for use in supercapacitors and dielectric devices. X-ray diffraction also confirmed a highly crystalline orthorhombic WO₃ structure. In contrast, SEM and FESEM microscopy revealed nanorod and nanosheet morphologies that formed amalgamated structures with an average crystalline size of 19–24 nm. The purity and composition of the synthesised material were confirmed by EDAX. Electrochemical measurements showed that the sample prepared with 5 min of ultrasonic irradiation had the highest specific capacitance of 252 F/g, with exceptional capacitance maintenance of 100 % after 3000 charge-discharge cycles, much greater than values that were previously reported for WO₃ synthesised by conventional hydrothermal or microwave-only processes (generally 44–200 F/g and lower retention). Dielectric results provided a dielectric constant of 6.88–14.16 at 1 kHz (40–100 °C) and an increase in AC conductivity with increasing frequency and temperature. Synergistic combinations of ultrasound and microwave irradiation yielded better crystallinity, agglomeration synthesis methods. This paper shows that using ultrasound with microwave-assisted WO₃ nanostructures can lead to better uses in future energy storage and dielectric-related applications.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"43 ","pages":"Article 101512"},"PeriodicalIF":5.45,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144522846","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}

{"title":"Radiation effect on gravity-driven nanofluid flow over a convective heated wall: RSM and ANN prediction analysis","authors":"Mojeed T. Akolade ,&nbsp;Amos S. Idowu","doi":"10.1016/j.nanoso.2025.101506","DOIUrl":"10.1016/j.nanoso.2025.101506","url":null,"abstract":"<div><div>Gravity-driven flows occur in both reservoir engineering and biological systems such as nutrient transport in blood and macromolecular migration in plants. In each case, the incorporation of engineered nanoparticles systematically enhances heat and mass transfer, overcoming the limitations of conventional refrigerants. In light of these applications, present investigation contribute to the existing body of knowledge through the development of a computational tool and predictive paradigms to help optimize and predict the desire output of heat and mass transfer flow of Casson nanofluid over a heated plate. To analyze these complex, nanoparticle influenced phenomena, a mathematical model is presented under the Bernoulli principle with conservation equations. Similarity transformation is employed to reduce the governing partial differential equations into a systems of ordinary differential equations, which are then solved using the spectral local linearization method for rapid convergence and high accuracy. The obtained responses from the numerical computations are used as prediction data for both the Artificial Neural Network (ANN) and Response Surface Methodology (RSM) under the randomized Box-Behnken (BB) design. The ANN adopt the MATLAB inbuilt Bayesian regularization algorithm. Our findings highlight that, co-contribution of buoyancy induced number <span><math><mrow><mi>G</mi><mi>r</mi></mrow></math></span> and soret phenomenon <span><math><mrow><mi>S</mi><mi>r</mi></mrow></math></span> diminished the heat transfer rate. For both assisting and opposing flow, an enhance phenomenon of energy and momentum field is experienced. The interplay of opposing flow with higher thermal radiation experienced an enhanced heat transfer rate while significant involvement of the internally generated heat (<span><math><mrow><mi>E</mi><mi>c</mi></mrow></math></span>) optimizes the heat transfer mechanism identify as effective heat transfer management. Moreover, through the prediction algorithm by RSM/ANN, we acquired a useful knowledge on effective energy optimization and cooling techniques for numerous biomedical and industrial applications.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"43 ","pages":"Article 101506"},"PeriodicalIF":5.45,"publicationDate":"2025-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144514212","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}

{"title":"Determination of barium ions by SERS using silver nanoparticles","authors":"Tatjana Charkova","doi":"10.1016/j.nanoso.2025.101511","DOIUrl":"10.1016/j.nanoso.2025.101511","url":null,"abstract":"<div><div>Barium and derivatives are widely used in various industries and enter the environment from water, biological, and industrial sources. Acute, chronic, and fatal effects of barium poisoning in humans have been identified. Therefore, more sensitive methods for detecting barium ions are being sought. The determination of barium ions by SERS is reported here. The method requires specifically functionalized plasmonic nanomaterials. The research describes a chemical reduction synthesis of spherical silver nanoparticles (55 ± 5 nm), their functionalization with 4-mercaptophenylacetic acid (MPAA), and the interaction of nanoparticles with barium ions. The experiments reveal morphological changes in nanostructures due to Ba(II) binding. The formation of the aggregated Ag-MPAA-Ba complex is shown visually and proven by UV-Vis, TEM, SERS data. The complex enhances the Raman signals of MPAA, allowing the detection of 10^–15 M Ba(II) and develops the potential of the method for future analytical applications.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"43 ","pages":"Article 101511"},"PeriodicalIF":5.45,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144480893","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}