Pub Date : 2025-09-25DOI: 10.1016/j.nanoso.2025.101546
Hrishikesh S. Labhade , Jaidip B. Wable , Dilip N. Ghule , Amol H. Kategaonkar , Samin S. Shaikh , Sharad S. Gaikwad
The advancement of green and efficient synthetic strategies is essential for the pursuit of environmentally sustainable organic transformations. Imidazole derivatives, recognized for their broad pharmacological and synthetic utility, are key structural motifs in various bioactive molecules. This study reports a one-pot, four-component synthesis of imidazole derivatives catalyzed by cerium-doped, silver-coated MgO (Ce-MgO@Ag) core-shell nanoparticles under solvent-free grinding conditions. The catalyst is synthesized via a sol-gel method and comprehensively characterized using XRD, FTIR, Ads-Des, BET, BJH, EDAX, FESEM, HRTEM, SAED, and XPS techniques. The model reaction employs an aromatic aldehyde, benzil, aniline, and ammonium acetate. Optimization of reaction conditions yields high-purity products with excellent efficiency. The synthesized imidazoles are characterized using FTIR, ¹H NMR, ¹³C NMR, and MS. Compared to conventional protocols, this nanocatalyst offers advantages such as high catalytic efficiency, superior yields, short reaction duration, inexpensive nature, operational simplicity, reusability, and environmental benignity. The findings underscore the potential of nanostructured catalysts in advancing green synthetic strategies.
{"title":"Efficient Ce-doped MgO@Ag core-shell catalyst for green synthesis of 1,2,4,5-tetrasubstituted imidazoles","authors":"Hrishikesh S. Labhade , Jaidip B. Wable , Dilip N. Ghule , Amol H. Kategaonkar , Samin S. Shaikh , Sharad S. Gaikwad","doi":"10.1016/j.nanoso.2025.101546","DOIUrl":"10.1016/j.nanoso.2025.101546","url":null,"abstract":"<div><div>The advancement of green and efficient synthetic strategies is essential for the pursuit of environmentally sustainable organic transformations. Imidazole derivatives, recognized for their broad pharmacological and synthetic utility, are key structural motifs in various bioactive molecules. This study reports a one-pot, four-component synthesis of imidazole derivatives catalyzed by cerium-doped, silver-coated MgO (Ce-MgO@Ag) core-shell nanoparticles under solvent-free grinding conditions. The catalyst is synthesized via a sol-gel method and comprehensively characterized using XRD, FTIR, Ads-Des, BET, BJH, EDAX, FESEM, HRTEM, SAED, and XPS techniques. The model reaction employs an aromatic aldehyde, benzil, aniline, and ammonium acetate. Optimization of reaction conditions yields high-purity products with excellent efficiency. The synthesized imidazoles are characterized using FTIR, ¹H NMR, ¹³C NMR, and MS. Compared to conventional protocols, this nanocatalyst offers advantages such as high catalytic efficiency, superior yields, short reaction duration, inexpensive nature, operational simplicity, reusability, and environmental benignity. The findings underscore the potential of nanostructured catalysts in advancing green synthetic strategies.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"44 ","pages":"Article 101546"},"PeriodicalIF":5.45,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156168","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}
Pub Date : 2025-09-24DOI: 10.1016/j.nanoso.2025.101541
Najib Ahmad Muhammad , Tarang Shinde , Prince Sharma
Friction stir welding (FSW) continues to rise among the solid state joining and welding processes due to its plentiful benefits. However, it has been met with drawbacks in joining dissimilar metals/materials for application in the transportation industries, other than their initial intended application for welding aluminum alloys. The present article discusses one of the more remarkable efforts employed to control or mitigate the persistent drawbacks, i.e., ultrasonic vibration-assisted FSW, to the various dissimilar material combinations, comprising aluminum alloys with copper, steel, titanium, and magnesium alloys, as this process has a significant effect on the joint formation and strength. The broader discussions on the effects of the ultrasonic vibration presence on the surface appearance, microstructural features, materials flow, and mechanical properties of these dissimilar materials will be revealed to understand the modification caused by the assisted energy on excellent weldability and joint performance. Given the increasing interest in advanced joining techniques for lightweight and radiation-resistant structures, this review also considers the potential relevance of such dissimilar joints in nuclear applications, particularly where aluminum-based systems interface with structural or shielding components.
{"title":"Review of interface evolution and joint performance in ultrasonic vibration-assisted friction stir welding of aluminum with dissimilar alloys","authors":"Najib Ahmad Muhammad , Tarang Shinde , Prince Sharma","doi":"10.1016/j.nanoso.2025.101541","DOIUrl":"10.1016/j.nanoso.2025.101541","url":null,"abstract":"<div><div>Friction stir welding (FSW) continues to rise among the solid state joining and welding processes due to its plentiful benefits. However, it has been met with drawbacks in joining dissimilar metals/materials for application in the transportation industries, other than their initial intended application for welding aluminum alloys. The present article discusses one of the more remarkable efforts employed to control or mitigate the persistent drawbacks, i.e., ultrasonic vibration-assisted FSW, to the various dissimilar material combinations, comprising aluminum alloys with copper, steel, titanium, and magnesium alloys, as this process has a significant effect on the joint formation and strength. The broader discussions on the effects of the ultrasonic vibration presence on the surface appearance, microstructural features, materials flow, and mechanical properties of these dissimilar materials will be revealed to understand the modification caused by the assisted energy on excellent weldability and joint performance. Given the increasing interest in advanced joining techniques for lightweight and radiation-resistant structures, this review also considers the potential relevance of such dissimilar joints in nuclear applications, particularly where aluminum-based systems interface with structural or shielding components.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"44 ","pages":"Article 101541"},"PeriodicalIF":5.45,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145156167","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}
Pub Date : 2025-09-24DOI: 10.1016/j.nanoso.2025.101552
Ghadeer M. Alharbi , Yassine Slimani , Munirah A. Almessiere , Najla S. Al-Shameri , Anwar Al-Hamid , Faten Ben Azzouz
Investigating the impact of co-introducing two distinct types of nanoparticles (NPs) with specific characteristics into high-temperature YBa2Cu3O7-d (Y123) superconductor ceramics is an engaging area of research. In this work, we used Ag and PbO NPs as the primary additives, while Al2O3, Dy2O3, SiO2, and WO3 NPs served as secondary additives. Two separate sample sets (identified as Ag-sample set and PbO-sample set) were produced via solid-state thermal sintering to comparatively evaluate the effectiveness of this dual-additive approach on the superconductivity of Y123 ceramics. Samples were subjected to comprehensive structural characterizations using X-ray diffraction (XRD) and scanning electron microscopy (SEM), and transport characterization using PPMS (Physical Property Measurement System) to measure resistivity-temperature (ρ-T), a.c susceptibility (χ-T), and d.c magnetization (M-H). The co-introduction of NPs was found to have a positive impact on the superconductivity and pinning capabilities of Y123. Well-oxygenated orthorhombic superconducting materials with onset critical temperature () of around 93.2 K were successfully produced. Importantly, the presence of PbO-NPs with specific other NPs (like SiO2 and WO3) proved to be more effective than the presence of Ag-NPs in enhancing critical current density (Jc) and pinning energy. Notably, the PbO-WO3 sample exhibited the highest value of Jc = 6000 A/cm2. Ag-NPs demonstrated their great effectiveness in upgrading the assemblage of grains and reinforcing their connectivity. The incorporation of both PbO and Ag with secondary oxide NPs created better pinning configurations, increasing, for instance, the Jc value by more than a factor of 5 for an applied field up to 1 Tesla for the PbO-WO3 sample in comparison to the non-added control sample. These findings have the potential to contribute to the advancement of second-generation high-temperature superconductor technologies.
{"title":"Effects of diverse nanoparticles co-introduction on superconducting traits of YBa2Cu3O7-d ceramics: A comparative analysis","authors":"Ghadeer M. Alharbi , Yassine Slimani , Munirah A. Almessiere , Najla S. Al-Shameri , Anwar Al-Hamid , Faten Ben Azzouz","doi":"10.1016/j.nanoso.2025.101552","DOIUrl":"10.1016/j.nanoso.2025.101552","url":null,"abstract":"<div><div>Investigating the impact of co-introducing two distinct types of nanoparticles (NPs) with specific characteristics into high-temperature YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-d</sub> (Y123) superconductor ceramics is an engaging area of research. In this work, we used Ag and PbO NPs as the primary additives, while Al<sub>2</sub>O<sub>3</sub>, Dy<sub>2</sub>O<sub>3</sub>, SiO<sub>2</sub>, and WO<sub>3</sub> NPs served as secondary additives. Two separate sample sets (identified as Ag-sample set and PbO-sample set) were produced via solid-state thermal sintering to comparatively evaluate the effectiveness of this dual-additive approach on the superconductivity of Y123 ceramics. Samples were subjected to comprehensive structural characterizations using X-ray diffraction (XRD) and scanning electron microscopy (SEM), and transport characterization using PPMS (Physical Property Measurement System) to measure resistivity-temperature (<em>ρ-T</em>), a.c susceptibility (<em>χ-T</em>), and d.c magnetization (<em>M-H</em>). The co-introduction of NPs was found to have a positive impact on the superconductivity and pinning capabilities of Y123. Well-oxygenated orthorhombic superconducting materials with onset critical temperature (<span><math><msubsup><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow><mrow><mi>on</mi></mrow></msubsup></math></span>) of around 93.2 K were successfully produced. Importantly, the presence of PbO-NPs with specific other NPs (like SiO<sub>2</sub> and WO<sub>3</sub>) proved to be more effective than the presence of Ag-NPs in enhancing critical current density (<em>J</em><sub><em>c</em></sub>) and pinning energy. Notably, the PbO-WO<sub>3</sub> sample exhibited the highest value of <em>J</em><sub><em>c</em></sub> = 6000 A/cm<sup>2</sup>. Ag-NPs demonstrated their great effectiveness in upgrading the assemblage of grains and reinforcing their connectivity. The incorporation of both PbO and Ag with secondary oxide NPs created better pinning configurations, increasing, for instan<sub><em>c</em></sub>e, the <em>J</em><sub><em>c</em></sub> value by more than a factor of 5 for an applied field up to 1 Tesla for the PbO-WO<sub>3</sub> sample in comparison to the non-added control sample. These findings have the potential to contribute to the advancement of second-generation high-temperature superconductor technologies.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"44 ","pages":"Article 101552"},"PeriodicalIF":5.45,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119615","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}
Pub Date : 2025-09-22DOI: 10.1016/j.nanoso.2025.101550
Irfan Mohammad , Ashok Jeshurun , Bogala Mallikharjuna Reddy
Due to advancements in 4D printing (4DP) technology, bioprinted materials can have many functions and dynamic features. Occluders, stents, microneedles, wound closures, smart cell microenvironments, implants, and drug delivery systems, are some examples of biomedical objects that have been manufactured using 4DP peocess. Due to similarity to bioapatite, hydroxyapatite nanocomposites (HAp NCs) are promising biomaterials in tissue engineering. Conventionally, bone/tissue engineering has extensively used HAp NCs due to their osteogenic and biocompatible qualities. However, traditional HAp production procedures restrict their extensive application in fabrication of biomedical materials, including bones, teeth, cartilage, etc. Novel techniques like 4DP have been used to create customized HAp NC–based scaffolds for the patients. In this review, we provide an overview of different 4DP methods that are utilized in the HAp NC-based scaffolds fabrication. Various natural sources of HAp and different synthesis methods have been investigated. Several 4DP HAp NC-based scaffolds, their properties, biomedical applications, advantages, disadvantages, and future prospects are discussed.
{"title":"Four-dimensional (4D) printing of naturally-derived hydroxyapatite nanocomposite-based scaffolds for biomedical applications: A review","authors":"Irfan Mohammad , Ashok Jeshurun , Bogala Mallikharjuna Reddy","doi":"10.1016/j.nanoso.2025.101550","DOIUrl":"10.1016/j.nanoso.2025.101550","url":null,"abstract":"<div><div>Due to advancements in 4D printing (4DP) technology, bioprinted materials can have many functions and dynamic features. Occluders, stents, microneedles, wound closures, smart cell microenvironments, implants, and drug delivery systems, are some examples of biomedical objects that have been manufactured using 4DP peocess. Due to similarity to bioapatite, hydroxyapatite nanocomposites (HAp NCs) are promising biomaterials in tissue engineering. Conventionally, bone/tissue engineering has extensively used HAp NCs due to their osteogenic and biocompatible qualities. However, traditional HAp production procedures restrict their extensive application in fabrication of biomedical materials, including bones, teeth, cartilage, etc. Novel techniques like 4DP have been used to create customized HAp NC–based scaffolds for the patients. In this review, we provide an overview of different 4DP methods that are utilized in the HAp NC-based scaffolds fabrication. Various natural sources of HAp and different synthesis methods have been investigated. Several 4DP HAp NC-based scaffolds, their properties, biomedical applications, advantages, disadvantages, and future prospects are discussed.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"44 ","pages":"Article 101550"},"PeriodicalIF":5.45,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119640","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}
Pub Date : 2025-09-20DOI: 10.1016/j.nanoso.2025.101556
Seyed Mohammad Amini
Diosgenin, a natural phytochemical, is promising in treating various diseases, including cancer, diabetes, arthritis, asthma, and cardiovascular conditions. Notably, it serves as a crucial raw material in the production of several steroid medications within the pharmaceutical industry. Given the vast array of opportunities presented by nanotechnology in the field of biomedicine, substantial research efforts have focused on the development of diverse nanoformulations derived from natural compounds, including diosgenin. This review examines a range of studies regarding the application of diosgenin in preparing nanomaterials, as well as the utilization of nanomaterials for the production, application, or delivery of diosgenin itself. Key insights into the remarkable potential of diosgenin within medical nanotechnology are emphasized. Its hydrophobic nature allows for efficient loading by organic nanostructures, enhancing its bioavailability in the body. Beyond its therapeutic attributes, due to its high chemical activity, diosgenin can act as a precursor for synthesizing various precursors for preparing organic or inorganic nanoparticles.
{"title":"Diosgenin-based nanomedicine: Advances in formulation strategies, biomedical applications, and translational challenges","authors":"Seyed Mohammad Amini","doi":"10.1016/j.nanoso.2025.101556","DOIUrl":"10.1016/j.nanoso.2025.101556","url":null,"abstract":"<div><div>Diosgenin, a natural phytochemical, is promising in treating various diseases, including cancer, diabetes, arthritis, asthma, and cardiovascular conditions. Notably, it serves as a crucial raw material in the production of several steroid medications within the pharmaceutical industry. Given the vast array of opportunities presented by nanotechnology in the field of biomedicine, substantial research efforts have focused on the development of diverse nanoformulations derived from natural compounds, including diosgenin. This review examines a range of studies regarding the application of diosgenin in preparing nanomaterials, as well as the utilization of nanomaterials for the production, application, or delivery of diosgenin itself. Key insights into the remarkable potential of diosgenin within medical nanotechnology are emphasized. Its hydrophobic nature allows for efficient loading by organic nanostructures, enhancing its bioavailability in the body. Beyond its therapeutic attributes, due to its high chemical activity, diosgenin can act as a precursor for synthesizing various precursors for preparing organic or inorganic nanoparticles.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"44 ","pages":"Article 101556"},"PeriodicalIF":5.45,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107378","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}
Pub Date : 2025-09-20DOI: 10.1016/j.nanoso.2025.101551
N.B. Singh , Ahmed Abdala , Most. Israt Jahan , Md. Abu Bin Hasan Susan
Nanotechnology has emerged as a transformative force in the cosmetics industry, offering innovative strategies to enhance formulation efficacy, stability, and multifunctionality. This review gives the historical evolution of nanotechnology in cosmetics and provides a systematic classification of nanomaterials, encompassing organic nanoparticles, lipid- and surfactant-derived carriers, polymeric nanoparticles, nanocrystals, and inorganic nanostructures. The functionality, particularly improved skin penetration, controlled release, and enhanced bioavailability are critically examined in relation to their applications in skincare products such as moisturizers, sunscreens, and anti-aging formulations. Beyond skincare, the expanding roles of nanomaterials in oral care, haircare (washing, treatment, and dyeing), decorative cosmetics, and nail care are discussed to highlight their versatility. The advantages of nanotechnology, including solubilization of poorly soluble actives, improved chemical stability, and reduced production time, are carefully weighed against pressing challenges such as toxicity concerns, environmental release, ethical implications, and regulatory limitations. The review emphasizes the importance of safe-by-design strategies, risk assessment frameworks, and consumer trust in advancing the responsible adoption of nanocosmetics. Looking ahead, future directions point toward the integration of sustainable practices, eco-friendly nanomaterials, and circular economy approaches to address environmental and societal expectations. Collectively, this review article provides an updated perspective on the potential, limitations, and sustainable pathways of nanotechnology in shaping next-generation cosmetic innovations.
{"title":"Nanomaterials in cosmetics: Transforming beauty through innovation and science","authors":"N.B. Singh , Ahmed Abdala , Most. Israt Jahan , Md. Abu Bin Hasan Susan","doi":"10.1016/j.nanoso.2025.101551","DOIUrl":"10.1016/j.nanoso.2025.101551","url":null,"abstract":"<div><div>Nanotechnology has emerged as a transformative force in the cosmetics industry, offering innovative strategies to enhance formulation efficacy, stability, and multifunctionality. This review gives the historical evolution of nanotechnology in cosmetics and provides a systematic classification of nanomaterials, encompassing organic nanoparticles, lipid- and surfactant-derived carriers, polymeric nanoparticles, nanocrystals, and inorganic nanostructures. The functionality, particularly improved skin penetration, controlled release, and enhanced bioavailability are critically examined in relation to their applications in skincare products such as moisturizers, sunscreens, and anti-aging formulations. Beyond skincare, the expanding roles of nanomaterials in oral care, haircare (washing, treatment, and dyeing), decorative cosmetics, and nail care are discussed to highlight their versatility. The advantages of nanotechnology, including solubilization of poorly soluble actives, improved chemical stability, and reduced production time, are carefully weighed against pressing challenges such as toxicity concerns, environmental release, ethical implications, and regulatory limitations. The review emphasizes the importance of safe-by-design strategies, risk assessment frameworks, and consumer trust in advancing the responsible adoption of nanocosmetics. Looking ahead, future directions point toward the integration of sustainable practices, eco-friendly nanomaterials, and circular economy approaches to address environmental and societal expectations. Collectively, this review article provides an updated perspective on the potential, limitations, and sustainable pathways of nanotechnology in shaping next-generation cosmetic innovations.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"44 ","pages":"Article 101551"},"PeriodicalIF":5.45,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107379","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}
Pub Date : 2025-09-20DOI: 10.1016/j.nanoso.2025.101553
Thi Hanh Trang Dang , Quan-Doan Mai , Thi Linh Dong , Trung Thanh Nguyen , Thi Loan Ngo , Thi Lan Nguyen , Xuan Quang Nguyen , Ta Ngoc Bach , Anh-Tuan Pham , Anh-Tuan Le
Surface-enhanced Raman spectroscopy (SERS) is a powerful analytical technique capable of directly detecting target molecules with ultrasensitivity down to the single-molecule level via their characteristic vibrational fingerprints. While SERS has achieved significant success in detecting various analytes such as organic dyes, pesticides, explosives, and bacteria, the direct detection of glucose – a vital biomarker for diabetes diagnosis and management – remains challenging due to its low affinity for bare metal surfaces and inherently weak Raman scattering cross-section. Despite these limitations, SERS offers a promising alternative to traditional enzyme-based glucose detection methods, which require invasive blood sampling and are highly susceptible to environmental fluctuations such as pH and temperature. In this work, we report the design of Fe3O4@C/Ag nanostructures as a high-performance SERS substrate for non-invasive, enzyme-free, and ultrasensitive glucose detection in artificial urine. The carbon shell provides good glucose adsorption, while the Ag coating ensures strong plasmonic enhancement. Notably, we introduce a magnetic-assisted SERS (MA-SERS) strategy in which the Fe3O4@C/Ag nanostructures are dispersed into urine samples to capture glucose and subsequently magnetically retrieved for SERS analysis. This platform enables direct glucose detection at concentrations as low as 0.21 mM, significantly below the clinical prediabetes threshold (5.6 mM), with excellent recovery values ranging from 92 % to 109 %. These results demonstrate the strong potential of the MA-SERS approach as a practical, non-invasive, and enzyme-free diagnostic tool for early detection and monitoring of diabetes.
{"title":"Magnetic-assisted surface-enhanced Raman spectroscopy of Fe3O4@C/Ag nanostructures for non-invasive, enzyme-free and ultrasensitive detection of glucose in urine for clinical diagnostics","authors":"Thi Hanh Trang Dang , Quan-Doan Mai , Thi Linh Dong , Trung Thanh Nguyen , Thi Loan Ngo , Thi Lan Nguyen , Xuan Quang Nguyen , Ta Ngoc Bach , Anh-Tuan Pham , Anh-Tuan Le","doi":"10.1016/j.nanoso.2025.101553","DOIUrl":"10.1016/j.nanoso.2025.101553","url":null,"abstract":"<div><div>Surface-enhanced Raman spectroscopy (SERS) is a powerful analytical technique capable of directly detecting target molecules with ultrasensitivity down to the single-molecule level via their characteristic vibrational fingerprints. While SERS has achieved significant success in detecting various analytes such as organic dyes, pesticides, explosives, and bacteria, the direct detection of glucose – a vital biomarker for diabetes diagnosis and management – remains challenging due to its low affinity for bare metal surfaces and inherently weak Raman scattering cross-section. Despite these limitations, SERS offers a promising alternative to traditional enzyme-based glucose detection methods, which require invasive blood sampling and are highly susceptible to environmental fluctuations such as pH and temperature. In this work, we report the design of Fe<sub>3</sub>O<sub>4</sub>@C/Ag nanostructures as a high-performance SERS substrate for non-invasive, enzyme-free, and ultrasensitive glucose detection in artificial urine. The carbon shell provides good glucose adsorption, while the Ag coating ensures strong plasmonic enhancement. Notably, we introduce a magnetic-assisted SERS (MA-SERS) strategy in which the Fe<sub>3</sub>O<sub>4</sub>@C/Ag nanostructures are dispersed into urine samples to capture glucose and subsequently magnetically retrieved for SERS analysis. This platform enables direct glucose detection at concentrations as low as 0.21 mM, significantly below the clinical prediabetes threshold (5.6 mM), with excellent recovery values ranging from 92 % to 109 %. These results demonstrate the strong potential of the MA-SERS approach as a practical, non-invasive, and enzyme-free diagnostic tool for early detection and monitoring of diabetes.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"44 ","pages":"Article 101553"},"PeriodicalIF":5.45,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107377","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}
Pub Date : 2025-09-19DOI: 10.1016/j.nanoso.2025.101555
Yogeshwar R. Baste , Vijaya J. Ushir , Bhagwat K. Uphade , Jagdish N. Ghotekar
In this work, pristine Iron sulphide (FeS) and nickel-doped Iron sulphide (Ni-FeS) nanomaterials were efficiently hydrothermally synthesized. The synthesized nanomaterial was scientifically investigated by various analytical techniques like FTIR, UV–visible spectroscopy, XRD, SEM-EDAX, and HR-TEM-SAED. The study reveals that synthesized FeS is crystalline hexagonal (troilite phase) with an average crystallite size of 17.21 nm. Ni-FeS crystal structure remains unchanged, but XRD peaks become broader compared to FeS due to Ni. The HR-TEM result confirms the particle sizes of FeS and Ni-FeS as 50–130 nm and 24 nm, respectively. Surface morphology of FeS and Ni-FeS appeared as a uniform distribution and agglomeration of particles, depicted by SEM. EDAX analysis confirms elemental composition. UV–visible and Tauc plot studies give band gap energies of 2.03 and 1.71 eV for FeS and Ni-FeS, respectively. The photodegradation of malachite green (MG) dye was scientifically evaluated to assess the photocatalytic capacity of both FeS and Ni-FeS. 90.05 % dye degradation was achieved by Ni-FeS, as compared to FeS 88.01 % under identical conditions. The gas sensing investigation studies give a good response and recovery time for H2S gas at 120 °C. All these results highlight the benefits of Ni-FeS and FeS as a promising, stable, and efficient material.
{"title":"FeS and Ni-doped FeS nanomaterials as bifunctional photocatalysts and gas sensors","authors":"Yogeshwar R. Baste , Vijaya J. Ushir , Bhagwat K. Uphade , Jagdish N. Ghotekar","doi":"10.1016/j.nanoso.2025.101555","DOIUrl":"10.1016/j.nanoso.2025.101555","url":null,"abstract":"<div><div>In this work, pristine Iron sulphide (FeS) and nickel-doped Iron sulphide (Ni-FeS) nanomaterials were efficiently hydrothermally synthesized. The synthesized nanomaterial was scientifically investigated by various analytical techniques like FTIR, UV–visible spectroscopy, XRD, SEM-EDAX, and HR-TEM-SAED. The study reveals that synthesized FeS is crystalline hexagonal (troilite phase) with an average crystallite size of 17.21 nm. Ni-FeS crystal structure remains unchanged, but XRD peaks become broader compared to FeS due to Ni. The HR-TEM result confirms the particle sizes of FeS and Ni-FeS as 50–130 nm and 24 nm, respectively. Surface morphology of FeS and Ni-FeS appeared as a uniform distribution and agglomeration of particles, depicted by SEM. EDAX analysis confirms elemental composition. UV–visible and Tauc plot studies give band gap energies of 2.03 and 1.71 eV for FeS and Ni-FeS, respectively. The photodegradation of malachite green (MG) dye was scientifically evaluated to assess the photocatalytic capacity of both FeS and Ni-FeS. 90.05 % dye degradation was achieved by Ni-FeS, as compared to FeS 88.01 % under identical conditions. The gas sensing investigation studies give a good response and recovery time for H<sub>2</sub>S gas at 120 °C. All these results highlight the benefits of Ni-FeS and FeS as a promising, stable, and efficient material.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"44 ","pages":"Article 101555"},"PeriodicalIF":5.45,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107376","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}
Pub Date : 2025-09-15DOI: 10.1016/j.nanoso.2025.101543
Madhavarao Kulkarni
This study presents an analysis of the Sutterby multi-diffusive nanoliquid flow over an expanding cylinder, incorporating an oscillatory magnetic field and activation energy, through the application of numerical simulation and artificial neural networks. Recently, artificial neural networks have attracted considerable interest owing to their applications in diverse fields, such as robotics, image processing, fluid mechanics, and beyond. This research aims to explore the transfer of heat and mass by employing numerical methods and artificial neural networks. The system consists of complex fluid-flow partial differential equations that are converted into ordinary differential equations by utilizing similarity variables. In the present problem, Buongiorno two-phase model is used, in the said model, slip due to nanoparticles at the wall is studied through two major slip mechanisms, namely, thermophoresis and Brownian diffusion. Further, by using MATLAB software, the reference data produced by the artificial neural network, which utilizes a Levenberg–Marquardt intelligent network, is allocated through three distinct characteristics: training, testing, and validation. The study involves calculating the mean squared error, analyzing histograms, and conducting regression analyses to demonstrate and assess the effects of the drag force and Nusselt number. The matrix laboratory function, utilized in addressing a boundary value problem through a 5th order method, enables the simulation of graphs and tables that clearly depict the various physical influences numerically represented in fluid flow profiles and gradients. The periodic magnetic field's intensity diminishes the energy transfer rate, concurrently leading to an elevation in the liquid's temperature, with the periodic characteristics of the magnetic field being distinctly evident. Furthermore, in the neural network simulation, 211 and 619 data points obtained from the numerical solutions of the velocity and temperature equations function as the databases throughout the training phase. In the training phase, the dataset is systematically partitioned into three subsets: 70 % is allocated for training purposes, 15 % is assigned for validation, and the final 15 % is set aside for testing, significantly.
{"title":"Analysis of Sutterby multi-diffusive nanoliquid flow over expanding cylinder using an artificial neural networks and numerical simulations in presence of activation energy and oscillating magnetic field","authors":"Madhavarao Kulkarni","doi":"10.1016/j.nanoso.2025.101543","DOIUrl":"10.1016/j.nanoso.2025.101543","url":null,"abstract":"<div><div>This study presents an analysis of the Sutterby multi-diffusive nanoliquid flow over an expanding cylinder, incorporating an oscillatory magnetic field and activation energy, through the application of numerical simulation and artificial neural networks. Recently, artificial neural networks have attracted considerable interest owing to their applications in diverse fields, such as robotics, image processing, fluid mechanics, and beyond. This research aims to explore the transfer of heat and mass by employing numerical methods and artificial neural networks. The system consists of complex fluid-flow partial differential equations that are converted into ordinary differential equations by utilizing similarity variables. In the present problem, Buongiorno two-phase model is used, in the said model, slip due to nanoparticles at the wall is studied through two major slip mechanisms, namely, thermophoresis and Brownian diffusion. Further, by using MATLAB software, the reference data produced by the artificial neural network, which utilizes a Levenberg–Marquardt intelligent network, is allocated through three distinct characteristics: training, testing, and validation. The study involves calculating the mean squared error, analyzing histograms, and conducting regression analyses to demonstrate and assess the effects of the drag force and Nusselt number. The matrix laboratory function, utilized in addressing a boundary value problem through a 5th order method, enables the simulation of graphs and tables that clearly depict the various physical influences numerically represented in fluid flow profiles and gradients. The periodic magnetic field's intensity diminishes the energy transfer rate, concurrently leading to an elevation in the liquid's temperature, with the periodic characteristics of the magnetic field being distinctly evident. Furthermore, in the neural network simulation, 211 and 619 data points obtained from the numerical solutions of the velocity and temperature equations function as the databases throughout the training phase. In the training phase, the dataset is systematically partitioned into three subsets: 70 % is allocated for training purposes, 15 % is assigned for validation, and the final 15 % is set aside for testing, significantly.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"44 ","pages":"Article 101543"},"PeriodicalIF":5.45,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107375","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}
Pub Date : 2025-09-12DOI: 10.1016/j.nanoso.2025.101542
Taruna Likhariya , Pragnesh N. Dave , Jalpa A. Vara
LaFexCo1-xO₃ (x = 0.2, 0.4, 0.6, 0.8) perovskite oxide nanoparticles with four different compositions were synthesized using the sol-gel method. Vibrational, optical, structural properties are studied by FT-IR, UV–visible spectrophotometry (UV-Vis), X-ray diffraction (XRD). As the amount of Fe content increases, there is shift in the highest intensity peak towards lower 2θ value in the XRD spectrum. DSC (Differential Scanning Calorimetry) plot was used to determine the best composition for ammonium perchlorate (AP) decomposition. LaFe0.4Co0.6O3 was the optimal composition, exhibiting the lowest peak temperature. It exhibits lowest band gap of 3.0 eV and smallest crystallite size of 9.03 nm. The mean grain size measured by FE-SEM was ∼35 nm. LaFexCo1-xO3 perovskites reduce the thermal decomposition of AP to a single step process. Among all the four compositions prepared, LaFe0.4Co0.6O3 decrease the exothermic peak of AP by 56 ˚C. Despite a low decomposition temperature range and low Tp, the formulation AP+ 1 %LaFe0.4Co0.6O3 needs to surpass a higher energy barrier than AP.
{"title":"Catalytic performance of LaFexCo1-xO3 perovskites in the thermal decomposition of ammonium perchlorate: Kinetic and mechanistic study","authors":"Taruna Likhariya , Pragnesh N. Dave , Jalpa A. Vara","doi":"10.1016/j.nanoso.2025.101542","DOIUrl":"10.1016/j.nanoso.2025.101542","url":null,"abstract":"<div><div>LaFe<sub>x</sub>Co<sub>1-x</sub>O₃ (x = 0.2, 0.4, 0.6, 0.8) perovskite oxide nanoparticles with four different compositions were synthesized using the sol-gel method. Vibrational, optical, structural properties are studied by FT-IR, UV–visible spectrophotometry (UV-Vis), X-ray diffraction (XRD). As the amount of Fe content increases, there is shift in the highest intensity peak towards lower 2θ value in the XRD spectrum. DSC (Differential Scanning Calorimetry) plot was used to determine the best composition for ammonium perchlorate (AP) decomposition. LaFe<sub>0.4</sub>Co<sub>0.6</sub>O<sub>3</sub> was the optimal composition, exhibiting the lowest peak temperature. It exhibits lowest band gap of 3.0 eV and smallest crystallite size of 9.03 nm. The mean grain size measured by FE-SEM was ∼35 nm. LaFe<sub>x</sub>Co<sub>1-x</sub>O<sub>3</sub> perovskites reduce the thermal decomposition of AP to a single step process. Among all the four compositions prepared, LaFe<sub>0.4</sub>Co<sub>0.6</sub>O<sub>3</sub> decrease the exothermic peak of AP by 56 ˚C. Despite a low decomposition temperature range and low T<sub>p</sub>, the formulation AP+ 1 %LaFe<sub>0.4</sub>Co<sub>0.6</sub>O<sub>3</sub> needs to surpass a higher energy barrier than AP.</div></div>","PeriodicalId":397,"journal":{"name":"Nano-Structures & Nano-Objects","volume":"44 ","pages":"Article 101542"},"PeriodicalIF":5.45,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145045504","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号