Nanoscale Advances最新文献

{"title":"A nitrogen and phosphorus enriched inorganic-organic hybrid material for electrochemical detection of selenium(iv) ions.","authors":"Arun Kumar, Prakriti Thakur, Nisha Dhiman, Sachin Balhara, Paritosh Mohanty","doi":"10.1039/d5na00079c","DOIUrl":"10.1039/d5na00079c","url":null,"abstract":"<p><p>A heteroatom (nitrogen and phosphorus) enriched pyridinic bridged inorganic-organic hybrid material (HPHM) was synthesized by polycondensing phosphonitrilic chloride trimer (PNC) and 2,6-diaminopyridine in DMSO at 140 °C. The synthesized material was used as an efficient electrode material for the electrochemical detection of selenium(iv) ions [Se(iv)] in aqueous solution. The HPHM electrode (active mass loading of 4.1 mg cm^-2) achieves a detection range of 5-50 ppb at a deposition potential of -1.2 V and a deposition time of 170 s with a lower limit of detection (LOD) of 2.18 ppb. This LOD is significantly below the World Health Organization's (WHO) recommended maximum level for selenium in drinking water. Moreover, the electrode material maintains high selectivity for Se(iv) ions in the presence of various interfering ions and high sensitivity over 200 cycles with only a minimal (∼6.83%) decline in current density response. The higher Se(iv) ion detection capability is attributed to the strategic incorporation of nitrogen and phosphorus heteroatoms, enhancing the material's electrochemical properties.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11915132/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143663849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chemical synthesis of Nd _<i>x</i> Co_1-<i>x</i> Fe₂O₄ hybrid nanoparticles for permanent magnet applications: structural, magnetic and electrical properties.","authors":"Saleh M Matar, Galal H Ramzy, Muhammad Arif, Ibrahim M Maafa, Ayman Yousef, Nasser Zouli, Ahmed F F Abouatiaa, Abdel Samed M Adam, Isam Y Qudsieh, Ahmed I Ali, Elbadawy A Kamoun, Amr Ali","doi":"10.1039/d5na00197h","DOIUrl":"10.1039/d5na00197h","url":null,"abstract":"<p><p>Nd-doped CoFe₂O₄ spinel ferrites were synthesized <i>via</i> the sol-gel method, confirming a cubic spinel structure. Increasing Nd concentration expanded the lattice parameter (8.3900-8.4231 Å) and unit cell volume while reducing grain size. FT-IR analysis validated the spinel phase. Nd doping enhanced the dielectric constant by affecting space charge polarization and charge hopping, with conductivity following a Debye-type relaxation mechanism. Cole-Cole plots indicated grain boundary effects and polaron hopping conduction. Magnetic properties improved with Nd³⁺ content, with <i>M</i> _s and <i>H</i> _c reaching 5.621 emu g^-1 and 143.43 Oe at 4% doping. A transition from an antiferromagnetic to a ferromagnetic state was observed, with a high Curie temperature (<i>T</i> _m) of 292 °C, confirming a stable ferromagnetic phase. These findings highlight Nd-doped CoFe₂O₄ as a promising candidate for permanent magnet applications.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11949247/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143753532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polarity-sensitive dual emissive fluorescent carbon dots as highly specific targeting probes for lipid droplets in live cells.","authors":"Aminakutty Neerkattil, M M Bijeesh, K K Ghosh, Parasuraman Padmanabhan, Balázs Gulyás, V M Murukeshan, Jayeeta Bhattacharyya","doi":"10.1039/d5na00061k","DOIUrl":"10.1039/d5na00061k","url":null,"abstract":"<p><p>Polarity-sensitive fluorescent nanoparticles with intrinsic dual emission are invaluable tools for investigating microenvironmental polarity. Ratiometric fluorescent sensors, with their built-in self-calibration characteristics, offer higher sensitivity and more obvious visual detection in qualitative and quantitative analysis. In this context, we report the synthesis of polarity-sensitive, dual-emitting carbon dots <i>via</i> a solvothermal method and demonstrate their application in ratiometric polarity sensing. These carbon dots exhibit characteristic solvatochromic effects with emissions in both the blue and red spectral regions. Notably, we observed a remarkable 30-fold enhancement in the red-to-blue emission intensity ratio as the solvent polarity shifted from 0.245 to 0.318. The dual-emitting carbon dots demonstrate the highly sensitive and inherently reliable (self-calibration) polarity dependence of the emission spectra, facilitating their application in ratiometric polarity sensing. These dual-emitting carbon dots exhibited a strong affinity for lipid droplets in live cells, demonstrating their potential as highly specific targeting probes for imaging lipid droplets in live cells, without the need for additional targeting ligands. The characteristics of excellent biocompatibility, photostability, and good cellular imaging capabilities make these dual-emitting carbon dots highly promising for biomedical and sensing applications.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11938281/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143730527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Battery-type CuCo₂O₄/CoS nanograss arrays as a binder-free advanced electrode material for high-performance supercapacitors.","authors":"Chandu V V Muralee Gopi, Araveeti Eswar Reddy, Sunkara Srinivasa Rao, K V G Raghavendra, Maduru Suneetha, Hee-Je Kim, R Ramesh","doi":"10.1039/d5na00070j","DOIUrl":"10.1039/d5na00070j","url":null,"abstract":"<p><p>This study uses a facile one-step hydrothermal method to successfully synthesize hierarchical dandelion flower-like CuCo₂O₄/CoS structures on Ni foam. The composite exhibits a unique dandelion flower-like architecture comprising interconnected nanograss arrays (NGAs), resulting in a significantly higher surface area than individual CuCo₂O₄ and CoS electrodes. Electrochemical characterization reveals that the CuCo₂O₄/CoS electrode exhibits superior electrochemical performance, demonstrating battery-type behavior with well-defined redox peaks in cyclic voltammetry and distinct plateaus in galvanostatic charge-discharge curves. The composite electrode delivers a high specific capacity of 217.86 mA h g^-1 at a current density of 6 mA cm^-2, surpassing the performance of individual CuCo₂O₄ (142.54 mA h g^-1) and CoS (160.37 mA h g^-1) electrodes. Moreover, the composite electrodes exhibit outstanding cycling life, retaining 86.23% of their initial capacity in over 3000 cycles. Electrochemical impedance spectroscopy analysis confirms lower charge transfer resistance and solution resistance for the composite electrode, indicating improved charge transfer kinetics and ion diffusion. These findings demonstrate that the hierarchical CuCo₂O₄/CoS composite holds significant promise as a high-performance battery-type electrode material for supercapacitor applications.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11950984/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143753530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"'Vitrimer nanocomposites' derived from graphene oxide and post-consumer recycled polypropylene.","authors":"Indranil Dey, Debashrita Kundu, Sayon Ghosh, Samir Mandal, Ketaki Samanta, Suryasarathi Bose","doi":"10.1039/d4na00904e","DOIUrl":"10.1039/d4na00904e","url":null,"abstract":"<p><p>Post-consumer recycled polypropylene (PCR PP) is promising for sustainable applications, yet its limitations in electrical conductivity and mechanical properties require modifications. This study develops a vitrimer nanocomposite by modifying PCR PP <i>via</i> styrene-assisted maleic anhydride grafting and incorporating a molecule containing multiple epoxide groups facilitating effective crosslinking. Graphene oxide (GO) is added as a nanofiller, improving rheological, thermal, electrical and infrared thermal properties. Characterization techniques confirm structural enhancements, while tensile testing shows significant gains in strength and modulus. The vitrimer nanocomposite demonstrates recyclability and high performance, offering a sustainable path for advanced engineering applications within a circular economy framework.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11955918/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143764489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly sensitive SERS-active substrate with uniform gold nanostructures on heat-treated Ni foam for detection of cardiovascular disease biomarker†","authors":"Sunghoon Yoo, Jaejun Park, Dong Hwan Nam, Sumin Kim, Dongtak Jeong, Moon-Keun Lee and Seunghyun Lee","doi":"10.1039/D5NA00052A","DOIUrl":"10.1039/D5NA00052A","url":null,"abstract":"<p >Surface-enhanced Raman scattering (SERS) immunoassays for biomarker detection have attracted considerable attention owing to their high sensitivity and selectivity. In this study, we fabricated hotspot-rich SERS-active substrates by depositing gold after forming a protruding structure on the surface <em>via</em> high-temperature heat treatment. The structure formed by the heat treatment enabled a more uniform and dense gold nanostructure, which provided more hotspots within the focal volume of the Raman laser, thereby enhancing the SERS signal. This was verified by calculating the electromagnetic field using a finite element method. The fabricated SERS-active substrates and 50 nm gold nanoparticles were used to perform a competitive assay for the detection of cardiac troponin I (cTnI). The assay demonstrated a cTnI detection range of 10<small>⁰</small>–10<small>⁶</small> pg mL<small>⁻¹</small> with a detection limit of 5.8 pg mL<small>⁻¹</small>. This indicates that the SERS-active substrate fabricated from the Ni foam has the potential to be used as a sensitive and selective tool for the detection of various biomarkers in complex biological samples.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" 8","pages":" 2171-2181"},"PeriodicalIF":4.6,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11905949/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143649681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metal-ligand interface effect in the chirality transfer from l- and d-glutathione to gold, silver and copper nanoparticles.","authors":"Juan Carlos López-Olivos, Andrés Álvarez-García, Georgina Garza Ramos, Lázaro Huerta, Paola Molina, Alejandro Heredia-Barbero, Ignacio L Garzón, Penélope Rodríguez-Zamora","doi":"10.1039/d5na00208g","DOIUrl":"10.1039/d5na00208g","url":null,"abstract":"<p><p>Glutathione (GSH) plays a pivotal role in numerous physiological and metabolic processes, including the defense of cells against free radicals and metal toxicity. This tripeptide has been combined with several metal nanoparticles to form a metal-organic interface with unique properties. Here, we implement a one-step, high-yield synthesis method to produce ultrasmall gold, silver, and copper nanoparticles in the intermediate size regime between size-selected nanoclusters and plasmonic nanoparticles to be functionalized with l- and d-glutathione, and study the chirality transfer evidenced by the emergent optical activity observed for each case. The distinctive interactions that take place at the metal-ligand interface for each metal are primarily accountable for establishing the properties of this system. In its protonated state, glutathione anchors only by its thiol group to the surface of gold and copper nanoparticles, whilst for silver nanoparticles an additional binding site through the nitrogen atom of the amide group was indicated by XPS data, albeit with a relatively low proportion. This may contribute to the higher anisotropy factor observed in silver-glutathione nanoparticles. Such slight variations in adsorption configuration generate different chiroptical activity, which has been analyzed per energy region using time-dependent DFT calculations, revealing that metal-to-ligand transitions dominate most of the spectra while ligand-to-ligand are also present in the higher energy regime. Moreover, FTIR and CD data together suggest that those dissimilarities also propitiate particular peptide self-assemblies through intermolecular GSH interactions for each metal, which result in supramolecular structures with properties of beta-sheet arrays. This study offers a parallel examination of the chirality of glutathione-functionalized coinage metals, allowing to establish decisive differences that can be tailored to benefit developments in chiral biomedicine and other diverse applications.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11915459/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143663785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new insight into the fabrication of colloidal isotropic ZnO nanocrystals by an organometallic approach.","authors":"Anna Wojewódzka, Małgorzata Wolska-Pietkiewicz, Roman H Szczepanowski, Maria Jędrzejewska, Karolina Zelga, Janusz Lewiński","doi":"10.1039/d4na00933a","DOIUrl":"10.1039/d4na00933a","url":null,"abstract":"<p><p>The study of factors controlling nanocrystal (NC) growth is essential for uncovering and understanding nanomaterial formation, which typically involves a complex sequence of precursor reactions, nucleation, and growth processes. Herein, as part of the continuous development of the self-supporting organometallic approach for the preparation of quantum-sized colloidal zinc oxide (ZnO) NCs, we selected a series of [EtZn(X)]-type carboxylate precursors, where X = methoxyacetate, 2-(2-methoxyethoxy)acetate, or 2-[2-(2-methoxyethoxy)ethoxy]acetate, as model self-supporting systems with varying carboxylate tail lengths. The controlled exposure of a [EtZn(X)]-type precursor solution to air afforded colloidal ZnO NCs with a narrow unimodal size distribution and coated with strongly anchored X-type ligands. Employing optical spectroscopy techniques, we investigate how the growth dynamics of NCs depend on the length of the carboxylate tail. Moreover, leveraging analytical ultracentrifugation (AUC), we meticulously examined the behavior of NCs in solution under centrifugal forces to gain valuable insights into their stability and aggregation tendencies. This study not only enhances understanding of the underlying 'living growth' of organometallic-derived nanostructures that leads to the formation of thermodynamically stable and monodispersed ZnO NCs but also significantly contributes to the ongoing development of more effective methods for synthesizing colloidal ZnO NCs, thereby advancing the field of materials science.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11938107/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143730526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a crystalline n-AgBr/p-NiO binary heterojunction for photocatalytic degradation of organic contaminants with accompanying mineralization, adsorption, and antimicrobial studies.","authors":"Murad Z A Warshagha, Ziyaur Rasool, Mohammad Saud Athar, Mohammad Muneer, Hatem M Altass, Raad Felemban, Abdelrahman S Khder, Saleh A Ahmed","doi":"10.1039/d4na01065e","DOIUrl":"10.1039/d4na01065e","url":null,"abstract":"<p><p>A highly effective and unique AgBr-NiO binary heterojunction was developed using an effective one-pot sol-gel method. The physicochemical properties of the produced materials were carefully examined using analytical techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET), ultraviolet-visible diffuse reflectance spectroscopy (UV-vis-DRS), Fourier transform infrared spectroscopy (FTIR), and photoluminescence (PL). The mesoporous nature and high surface properties of AgBr-NiO were revealed by the BET analysis. The AgBr-NiO composite showed greater photocatalytic degradation efficiency than bare AgBr and NiO when exposed to visible light for the colored anionic dye rhodamine B (RhB) and bisphenol A (BPA), a colorless endocrine-disrupting contaminant (EDC), resulting in high photocatalytic activity for the degradation of RhB (97.6% in 11 min) and BPA (85% in 120 min). Additionally, a notable decrease in TOC over time was observed under similar reaction conditions in the photo-mineralization examination of both model pollutants. Trapping tests were conducted to determine which reactive oxygen species (ROS) were involved in the degradation process. A plausible Z-scheme mechanism for this n-p heterojunction was proposed to explain the formation of e^-/h⁺ pairs induced by visible light. The proposed work facilitates the development of a recyclable photocatalyst characterized by high biological activity and low toxicity.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" ","pages":""},"PeriodicalIF":4.6,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11949248/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143753534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Inclusion of polysaccharides in perovskite thin films: from in-solution interaction to film formation and stability†","authors":"Francesco Bisconti, Antonella Giuri, Nadir Vanni, Sonia Carallo, Silvia Spera, Rosamaria Marrazzo, Riccardo Po', Paolo Biagini, Barbara Paci, Amanda Generosi, Marco Guaragno, Carola Esposito Corcione, Andrea Listorti, Silvia Colella and Aurora Rizzo","doi":"10.1039/D4NA01036A","DOIUrl":"10.1039/D4NA01036A","url":null,"abstract":"<p >Despite perovskite solar cells (PSCs) being among the most promising photovoltaic technologies, their widespread adoption requires further advancements in material processability and long-term stability. Polysaccharides have emerged as effective additives for assisted perovskite thin film crystallization in one step dripping-free deposition. Here, with the aim of rationalising their effect, the role of the hydroxyl groups (–OH) in the polymer structure, affecting the formation of perovskite–polymer nanocomposites, has been thoroughly analysed by comparing two celluloses, hydroxyethyl cellulose (HEC) and cellulose acetate (CAT), in which some of the –OH groups are replaced by acetyl groups. The combination of nuclear magnetic resonance (NMR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and rheological analysis showed that HEC strongly interacts with perovskite precursors already in solution, retards DMSO evaporation and then modifies the crystallisation dynamics process, resulting in a film characterised by highly uniform grain structure and improved film stability, with a power conversion efficiency (PCE) of 15.89%. In contrast, CAT with partially substituted –OH groups showed weaker interactions resulting in non-uniform crystal growth and poor film morphology. Furthermore, Energy Dispersive X-ray Reflectivity (EDXR), Atomic Force Microscopy (AFM), and X-ray Diffraction (XRD) confirm that HEC-based films maintain structural stability under light-aging conditions, whereas pristine methylammonium lead iodide (MAPbI<small>₃</small>) undergoes significant degradation. These findings highlight the potential of HEC as an intrinsic stabilizer for perovskite films, paving the way for more durable and scalable PSC technologies.</p>","PeriodicalId":18806,"journal":{"name":"Nanoscale Advances","volume":" 8","pages":" 2145-2157"},"PeriodicalIF":4.6,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11913129/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143657781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}