Nano-Structures & Nano-Objects最新文献

{"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}

{"title":"Complete carbohydrate-based synthetic strategy for an efficient plasmonic metal and alloy nanostructured SERS substrate","authors":"Sumitha Chandran ,&nbsp;Bijal K. Bahuleyan ,&nbsp;Shibin Thomas","doi":"10.1016/j.nanoso.2025.101476","DOIUrl":"10.1016/j.nanoso.2025.101476","url":null,"abstract":"<div><div>Surface enhanced Raman spectroscopy (SERS) has grown to be one of the most effective spectroscopic methods with a wide range of applications since the discovery of enhanced spectrum of pyridine on a silver electrode. However, the challenges in fabricating an affordable, simple, and long-lasting substrate restricts its application in devices. In this study, we report for the first time on a novel, inexpensive polymer-based SERS substrate made by thermally evaporating colloidal solutions of metal and alloy nanoparticles over humid sheets of cellulose acetate (CA). Green synthetic strategies were adopted for preparing nanoparticles using glucose as the reducing agent and starch as the capping agent. Au, Ag and their alloys decorated CA sheets were prepared, and the nanoparticle formation is confirmed by UV-Visible absorption spectroscopy. Diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDAX), atomic force microscopy (AFM) and Fourier transform infra-red (FT-IR) spectroscopy were used for the characterization of the nanoparticle decorated CA sheets. 1,4-benzenedithiol (1,4-BDT) is used as the Raman active molecule for SERS studies. A noticeably greater Raman enhancement was observed using these sheets, demonstrating the potential of these substrates for use in SERS-based devices.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101476"},"PeriodicalIF":5.45,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739933","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":"Precision engineering of vinblastine-loaded zinc oxide nanoparticles through statistical experimental design","authors":"Zenli Cheng ,&nbsp;Ashok Kumar Janakiraman ,&nbsp;Ramkanth Sundarapandian ,&nbsp;Sinouvassane Djearamane ,&nbsp;Hanish Singh Jayasingh Chellammal ,&nbsp;Haja Nazeer Ahamed ,&nbsp;Saminathan Kayarohanam","doi":"10.1016/j.nanoso.2025.101472","DOIUrl":"10.1016/j.nanoso.2025.101472","url":null,"abstract":"<div><div>The application of multifunctional zinc oxide nanoparticles (ZnONPs) for the delivery of vinblastine (VB) represents a novel approach in nanomedicine. However, the synthesis of this combination, its characteristics and potential in biomedical applications have yet to be explored. Given its promising therapeutic prospects, a holistic experimental approach is essential to achieve a robust formulation of VB-ZnONPs with therapeutic values. Hence, this study aimed to employ statistical experimental design to optimize the synthesis of vinblastine (VB)-loaded ZnONPs and assess their potential in targeted drug delivery and antimicrobial applications. The effect of the critical process parameters such as stirring temperature, stirring speed and drying temperature on the mean particle size, zeta potential (ZP), and entrapment efficiency (EE) were evaluated and the optimal synthesis conditions were determined with Box-Behnken Design (BBD). Under the optimal synthesis conditions, VB-ZnONPs achieved mean particle size, ZP and EE of 159 ± 0.78 nm, −16.5 ± 0.61 mV and 92.8 ± 0.02 %, respectively, consistent with the predicted values from the software. UV–visible spectroscopy revealed an absorbance peak at 270 nm for VB and 344 nm for ZnONPs, confirming the formation of VB-ZnONPs. Further, the synthesis of VB-ZnONPs was affirmed through the detection of VB and ZnO functional groups in the Fourier transform infrared spectroscopy. Transmission electron microscopy confirmed irregular and quasi-spherical shaped particles, while energy-dispersive X-ray spectroscopy (EDX) displayed the elemental distribution of zinc, oxygen and carbon. The stability of VB-ZnONPs was verified through thermogravimetric analysis. X-ray diffraction pattern revealed that VB-ZnONPs possessed a crystallite size of 22.9 nm and a hexagonal wurtzite structure. VB-ZnONPs demonstrated pH-sensitive release of VB, indicating potential for targeted delivery to tumor microenvironment. Moreover, they prevented the growth of Gram-positive bacteria (<em>Staphylococcus aureus, Staphylococcus epidermidis and Bacillus subtilis)</em> in a dose-dependent manner. These research findings underscore the significance of employing a statistical approach in optimizing the formulation of VB-ZnONPs and the potential of VB-ZnONPs in biomedical applications.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101472"},"PeriodicalIF":5.45,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715798","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":"Nano-engineered magnesium-enriched sugarcane bagasse for dual decontamination of heavy metals and E. coli in sewage water","authors":"Rehab F. Mohamed ,&nbsp;Ahmed A. Afifi ,&nbsp;Mohamed Azab El-Liethy ,&nbsp;Hossam F. Nassar","doi":"10.1016/j.nanoso.2025.101475","DOIUrl":"10.1016/j.nanoso.2025.101475","url":null,"abstract":"<div><div>Sugarcane bagasse (SCB) is a fibrous lignocellulosic waste formed when sugarcane is crushed to extract juice for ethanol and sugar manufacture. The study's goal was to look at how chemical alteration affects the properties of SCB combined with Mg and how successful it is at removing three heavy metals including (Copper (Cu^2 +), Zinc (Zn²⁺), and Lead (Pb²⁺)) as well as <em>Escherichia coli</em> (<em>E. coli</em>) from contaminated wastewater. The chemical and physical characteristics of the biochar generated were investigated at temperatures of 600°C and 800°C using the Brunauer-Emmett-Teller (BET) surface area analyzer, thermo gravimetric analysis (TGA), Fourier transform infrared (FTIR) peak analysis, and energy dispersive X-ray (EDS). A batch sorption test was carried out to determine the ability of sugarcane bagasse biochar (SCBB) to adsorb Cu, Pb, and Zn from solution. The adsorption data were examined using the Langmuir and Freundlich adsorption isotherms. The results indicate that the Langmuir isotherm model produced the best precise match. An accurate estimate for employing SCBB as a biosorbent material was used in sewage and industrial wastewater (contact time one hour, optimal dosage 800 ppm). The SCBB achieves maximum removal rates of 81.4, 83.5, and 89.2 % for biological oxygen demand (BOD), chemical oxygen demand (COD), and total suspended solids (TSS), respectively. However, nitrate nitrogen (NO₃-N) reached 52.2 %, while total phosphorus (TP) reached 63.2 %. Pb, Zn, and Cu were completely removed. The minimum inhibitory concentration (MIC) of SCBB against <em>E. coli</em> was 600 mg/mL. <em>E. coli</em> is completely eradicated from wastewater using 800 mg/L of SCBB in one hour. The present study developed potent, cost-effective, ecofriendly and multifunctional adsorbent of MgO-modified SCBB for safely wastewater de-pollution as a promising environmental remediation technology.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101475"},"PeriodicalIF":5.45,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715799","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":"Laser-assisted synthesis of metakaolin/Pd nanocomposite and its application as catalyst in wastewater remediation","authors":"Babak Jaleh ,&nbsp;Ahmadreza Sahraei ,&nbsp;Mahtab Eslamipanah ,&nbsp;Fatemeh Seifikar ,&nbsp;Saeid Azizian ,&nbsp;Sara Jalali ,&nbsp;Stefan Enghardt ,&nbsp;Benjamin Kruppke ,&nbsp;Hossein Ali Khonakdar ,&nbsp;Manoj B. Gawande","doi":"10.1016/j.nanoso.2025.101471","DOIUrl":"10.1016/j.nanoso.2025.101471","url":null,"abstract":"<div><div>Developing industrial activity and changing climate worldwide increase water contaminants and reduce safe water resources. Therefore, wastewater treatment and the removal or reduction of water contaminants have become important challenges. Affordable nanocatalysts for wastewater treatment are an effective solution to overcome this problem. Fabrication of a new type of metakaolin/Pd nanocomposite (MK/Pd) facilitates the reduction of noxious methyl orange and Cr(VI). This nanocomposite was manufactured based on the deposition of Pd NPs on the MK. In this study, the MK was first synthesized through a one-step heat treatment process at -750 °C for 4 h. Meanwhile, the laser ablation of Pd target in deionized water was also applied as a fast and chemical-free technique to prepare colloidal Pd nanoparticles (NPs). The samples were analyzed using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and BET analysis. The structural investigations indicated that MK surfaces with rough platy morphology were decorated with Pd NPs with an average crystallite size of 42 nm. The catalytic performance of the MK/Pd was also investigated for the reduction of methyl orange (MO) and Cr(VI) in an aqueous medium employing sodium borohydride or formic acid. The progress of reactions was monitored using UV–Vis spectroscopy, suggesting that the as-fabricated nanocomposite delivers very rapid reduction of both Cr(VI) (45 s) and MO (400 s). Compared to MO, Cr(VI) reduced ten times faster.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101471"},"PeriodicalIF":5.45,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679919","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":"Recent advancements in nanostructured flame-retardants: Types, mechanisms, and applications in polymer composites","authors":"Manoj Kumar Singh ,&nbsp;Sanjay Mavinkere Rangappa ,&nbsp;Manjusri Misra ,&nbsp;Amar K. Mohanty ,&nbsp;Suchart Siengchin","doi":"10.1016/j.nanoso.2025.101468","DOIUrl":"10.1016/j.nanoso.2025.101468","url":null,"abstract":"<div><div>Nanostructured flame-retardants offer an innovative approach to improve the fire safety of materials while addressing performance, environmental, and health challenges associated with traditional flame-retardants (FRs). By utilizing nanoscale FRs such as CNTs, nanoclays, nanoparticles, graphene, and metal-organic frameworks, unique flame retardancy mechanism can be obtained. Nanostructured flame-retardants enhance the fire resistance of polymer and polymer composites through heat dissipation, barrier effects, and char promotion, significantly reducing heat and gas transfer. Furthermore, the high specific surface area of nanostructured flame-retardants ensures effective dispersion within the polymer matrix without compromising thermal or mechanical properties. These materials also provide multi-functional properties such as electrical conductivity and thermal conductivity along with flame retardancy. Due to its multi-functional properties, these materials have various applications in different industries such as construction, electronics, automotive, and aerospace. However, challenges such as compatibility with polymers, potential environmental impacts and scalability are the critical areas, which need more focus in ongoing research. This review is mainly focused on nanostructured flame-retardants and their types, mechanisms and applications of flame-retardant polymer composites, emphasizing recent advancements. It also highlights their role in improving material sustainability and discusses challenges and future directions. Nanostructured flame-retardants offer a promising path toward safer, more efficient, and sustainable fire-resistant materials, meeting the increasing demand for multifunctional and ecofriendly solutions across key industries.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101468"},"PeriodicalIF":5.45,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654742","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-induced structural behavior in CaO-doped ZrO2 nanocrystals: A high-temperature synchrotron XRD and XAS study","authors":"Budi Hariyanto ,&nbsp;Sufilman Ely ,&nbsp;Allif Rosyidy Hilmi ,&nbsp;Suttipong Wannapaiboon ,&nbsp;Krongthong Kamonsuangkasem ,&nbsp;Chatree Saiyasombat ,&nbsp;Holilah ,&nbsp;Sri Yani Purwaningsih ,&nbsp;Malik Anjelh Baqiya ,&nbsp;Retno Asih ,&nbsp;Suminar Pratapa","doi":"10.1016/j.nanoso.2025.101470","DOIUrl":"10.1016/j.nanoso.2025.101470","url":null,"abstract":"<div><div>The crystal and local structures of nanocrystalline undoped and CaO-doped ZrO₂ were investigated using high-temperature synchrotron X-ray powder diffraction (XRD) and X-ray absorption spectroscopy (XAS). Nanocrystalline ZrO₂ was synthesized via a co-precipitation method, whereas CaO-doped ZrO₂ was prepared through mechanochemical wet milling, using CaO derived from natural limestone as the dopant. High-temperature synchrotron XRD analysis showed the transformation of undoped and CaO-doped ZrO₂ from an amorphous state to a tetragonal phase, stable up to 1100 °C. The CaO-doped ZrO₂ required higher temperatures to achieve a fully tetragonal transformation compared to the undoped sample. At equivalent temperatures, Ca doping induced larger lattice parameters, reduced tetragonality, and slower unit-cell volume contraction. However, CaO-doped ZrO₂ with 5.0 mol% CaO dopant concentration following fast cooling at a rate of 50 °C/min induced the formation of minor phases, specifically m-ZrO₂ and CaZrO₃. Furthermore, in situ extended X-ray absorption fine structure (EXAFS) analysis at 700 and 800 °C revealed that the Ca dopant elongated Zr-O_I bonds by substituting Zr⁴⁺ with larger Ca²⁺ ions and forming oxygen vacancies, effectively suppressing atomic vibrations. The results reported here point out the structural adaptability of CaO-doped ZrO₂ nanocrystals, reinforcing their suitability for high-temperature applications.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101470"},"PeriodicalIF":5.45,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637041","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":"Green synthesis of α-MnO2/Ag nanocomposite using Malva parviflora (Khabbaz) extract for antimicrobial activity","authors":"Saja Q. Ali ,&nbsp;Duha A. Kadhim ,&nbsp;Asmaa Hadi Mohammed ,&nbsp;Raghad S. Mohammed ,&nbsp;Muslim A. Abid ,&nbsp;Sara A. Athari","doi":"10.1016/j.nanoso.2025.101467","DOIUrl":"10.1016/j.nanoso.2025.101467","url":null,"abstract":"<div><div>The green synthesis method was used to make alpha manganese dioxide (α-MnO₂), silver nanoparticles (Ag NPs), and alpha-manganese dioxide/silver nanocomposite (α-MnO₂/Ag NCs) from the <em>Malva parviflora plant leaves</em> extract. The XRD patterns, FE-SEM analysis, AFM device, EDX spectrum, and UV–visible spectrum were used to characterize the α-MnO₂ NPs, Ag NPs, and α-MnO₂/Ag NCs. Crystal structure and crystal size values were determined through XRD patterns. The XRD results show that α-MnO₂ NPs, Ag NPs, and α-MnO₂/Ag NCs have a tetragonal and cubic shape, with crystallite sizes ranging from 13 to 25 nm, 14–38 nm, and 13–40 nm, respectively. This study also used FE-SEM to show that the α-MnO₂ NPs, Ag NPs, and α-MnO₂/Ag NCs particles are very small, measuring 38.44, 30.04, and 58.07 nm, in that order. The AFM scans showed that the α-MnO₂ NPs, Ag NPs, and α-MnO₂/Ag NCs were half-spherical and spherical, and their sizes ranged from 72.8 to 159.3 nm. The EDX spectrum and image showed α-MnO₂ NPs, Ag NPs, and α-MnO₂/Ag NCs that were pure and had Mn and Ag in them. The UV-Vis spectrum shows the energy band gaps of 5, 5.3, and 6.2 eV for α-MnO₂ NPs, Ag NPs, and α-MnO₂/Ag NCs, respectively. The diffusion method was used to look at the areas where α-MnO₂ NPs, Ag NPs, and α-MnO₂/Ag NCs stopped bacteria from growing. This study found that the inhibition zones for gram-positive bacteria (Staphylococcus aureus and staphylococcus epidemidis) were 16.00–19.00 % mm, 14.00–17.00 mm, and 15.00–17.67 mm in size. For gram-negative bacteria (Escherichia coli and Klebsiella pneumonia), they were 13.00–16.00 mm, 13.00–14.00 mm, and 14.00–20.67 mm in size. For fungi, the inhibition zone diameters (IZDs) were 4.67 ± 0.58 mm, 15.00 ± 0.00 mm, and 14.00 ± 0.58 mm, respectively. Using a green synthesis method to mix the <em>Malva parviflora</em> plant leaves extract with MnNO₃ and AgNO₃ salt is a pretty new idea that hasn't been seen in any study papers yet, as far as the author knows.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101467"},"PeriodicalIF":5.45,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619761","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":"Performance optimization of hybrid nano-engineered geopolymer binders-based ultra-high-performance concrete","authors":"Jayant M. Raut ,&nbsp;Prashant B. Pande ,&nbsp;Kamlesh V. Madurwar ,&nbsp;Boskey V. Bahoria ,&nbsp;Rajesh M. Bhagat ,&nbsp;Niteen T. Kakade ,&nbsp;Pravin Y. Karmore ,&nbsp;Latika Pinjarkar ,&nbsp;Manjushree Muley","doi":"10.1016/j.nanoso.2025.101469","DOIUrl":"10.1016/j.nanoso.2025.101469","url":null,"abstract":"<div><div>Ultra-high-performance and sustainable construction materials have given the thrust to the development of geopolymer technology. This work presents a nano-engineered geopolymer binder incorporating hybrid nano-reinforcements of nano-silica and graphene oxide at optimized ultrasonication and mechanical milling for improved dispersion and prevention of agglomeration. The resulting specimen exhibits a compressive strength exceeding 120 MPa at 24 h and a water absorption below 3 %. A microwave-assisted novel curing method accelerates geopolymerization, achieving this strength in less than 1 h and a reduction of the curing duration by 70 %. Further employing doped CNTs for structural health sensing has even greater potential, creating a self-sensing system with a gauge factor of over 25. Synchrotron XRD analysis supplies information about phase evolution, thus ensuring a crystallinity index greater than 50 %. Molecular dynamics simulations predict robust interactions with bond energies beyond 320 KJ/mol, whereas kinetic modeling optimizes reaction rates of up to 80 % polymerization within 8 h. Ballistic Impact testing shows over 50 percent enhancement in impact resistance, proving to be very robust under a severe loading condition. The overall picture created by inter alia superior mechanical properties, durability, self-sensing ability, and environmental benefits (20 % energy saving) should be considered as a paradigm shift for constructions with high performance and sustainability, stretching its applications to aerospace and defenses.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101469"},"PeriodicalIF":5.45,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610584","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":"Radiative porosity sodium alginate hybrid nanofluid flow over an exponential stretching/shrinking surface: Dual solutions","authors":"Adnan Asghar ,&nbsp;Teh Yuan Ying ,&nbsp;Liaquat Ali Lund ,&nbsp;Zahir Shah ,&nbsp;Narcisa Vrinceanu ,&nbsp;Saeed Islam","doi":"10.1016/j.nanoso.2025.101463","DOIUrl":"10.1016/j.nanoso.2025.101463","url":null,"abstract":"<div><div>An investigation into the effects that porous medium, magnetic fields, thermal radiation, and viscous dissipation have on SA-hybrid nanofluid was the focus of a numerical study that was carried out for a dual branches solution that featured an exponentially stretching and shrinking layer. The principal goal of this study is to explore the behavior of coefficient skin friction and heat transfer with the permeability parameter for the suction aspect, as well as the behavior of solid volume fraction against the stretching/shrinking effect. The impact of the permeability parameter, magnetic, shrinkage parameter, and viscous dissipation on the temperature profile and velocity of sodium alginate-hybrid nanofluid flow are also incorporated in the present investigation. The governing equations in the form of partial differential equations (PDEs) are transformed into the form of ordinary differential equations (ODEs), implementing a similarity variable having exponential similarity. The ODE system is numerically solved using the Three-stage Labatto III-A technique included in the bvp4c solver with the MATLAB program. Two branches’ solutions are obtained when the pertinent parameters are varied over defined ranges. Non unique solutions are obtained when the critical point reaches suction greater or equal to suction critical points and shrinking paramter greater or equal to shrinking paramter critical points for suction and shrinkage effects respectively. In addition, the upper branch has a significant increase in reduced skin friction and heat transfer when the permeability parameter is raised, whereas the lower branch experiences a decrease. The heat transfer rate diminutions in the upper branch solution and increases in the lower branch solution as the solid volume percentage of copper increases. Temperature profiles decrease as permeability parameter values improve. As Eckert's value increases, the temperature profile also improves.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"42 ","pages":"Article 101463"},"PeriodicalIF":5.45,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593201","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}