Nanomaterials最新文献

{"title":"Marine Macroalga-Mediated Green Synthesis of Silver Nanoparticles Using <i>Ulva reticulata</i> for Sunlight-Assisted Photocatalytic Degradation of Synthetic Dyes.","authors":"Ganesan Ezhumalai, Harishna A Ajay, Golap Chandra Singha, Sathiyaraj Srinivasan, Rajkumar Renganathan","doi":"10.3390/nano16191261","DOIUrl":"10.3390/nano16191261","url":null,"abstract":"<p><p>Marine macroalgae provide renewable biological resources for the eco-friendly synthesis of functional nanomaterials for environmental remediation. This study synthesized silver nanoparticles (AgNPs) using an aqueous extract of the green macroalga <i>Ulva reticulata</i> and evaluated their sunlight-driven photocatalytic activity against synthetic dyes. Five seaweed species were screened for AgNP synthesis, and <i>U. reticulata</i> was selected based on visible color change and UV-visible spectral response. The effects of light conditions, incubation time, AgNO₃-to-extract ratio, temperature, pH, and AgNO₃ concentration were optimized. Maximum AgNP synthesis was achieved under light conditions using a 7:3 ratio of AgNO₃ solution to algal extract, 1 mM AgNO₃, pH 8, and incubation at 60 °C for 24 h. UV-visible spectroscopy showed a characteristic surface plasmon resonance peak at approximately 440 nm. FTIR analysis indicated that algal functional groups contributed to silver ion reduction and nanoparticle stabilization. SEM analysis showed predominantly spherical AgNPs with an average size of 3.1 nm, while EDS analysis confirmed the presence of elemental silver. The biosynthesized AgNPs degraded methylene blue, methyl orange, aniline blue, and rose bengal under sunlight, achieving 60-90% decolorization after 24 h. These findings support <i>U. reticulata</i> as a promising marine biological platform for sustainable AgNP synthesis and dye-contaminated wastewater treatment.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13667079/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149183221","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":"RETRACTED: Tishkevich et al. Magnetic Properties of the Densely Packed Ultra-Long Ni Nanowires Encapsulated in Alumina Membrane. <i>Nanomaterials</i> 2021, <i>11</i>, 1775.","authors":"Daria Tishkevich, Alla Vorobjova, Dmitry Shimanovich, Egor Kaniukov, Artem Kozlovskiy, Maxim Zdorovets, Denis Vinnik, Andrei Turutin, Ilya Kubasov, Alexander Kislyuk, Mengge Dong, M I Sayyed, Tatiana Zubar, Alex Trukhanov","doi":"10.3390/nano16191262","DOIUrl":"10.3390/nano16191262","url":null,"abstract":"<p><p>The journal retracts the article \"Magnetic Properties of the Densely Packed Ultra-Long Ni Nanowires Encapsulated in Alumina Membrane\" [...].</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13643887/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149128002","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":"Influence of Shelf-Aging on Resistive Switching Characteristics of Sol-Gel-Processed ZnO and Al-Doped ZnO Structures.","authors":"Dongjin Moon, Jaehoon Kim","doi":"10.3390/nano16191263","DOIUrl":"10.3390/nano16191263","url":null,"abstract":"<p><p>Sol-gel-processed zinc oxide (ZnO) is indispensable in various optoelectronic applications, such as quantum dot light-emitting diodes (QLEDs), due to its high electron transport capability and adjustable oxygen vacancy characteristics. However, its commercialization has been delayed by defect-related issues and a high sensitivity to fabrication conditions. ZnO exhibits complex aging behaviors, notably 'shelf-aging,' where device properties change unpredictably over time even without external stimuli. Recent studies suggest that this shelf-aging in QLEDs might relate to the resistive switching (RS) behavior in ZnO, affecting the current conduction mechanism through external bias and internal oxygen dynamics. Despite its significance, systematic studies on the shelf-aging effects in ZnO-based RS structures have been lacking. In this study, we fabricate RS devices using sol-gel-processed ZnO and aluminum-doped ZnO (AZO) as dielectric layers, employing indium tin oxide (ITO) and aluminum (Al) as electrodes-materials commonly utilized in QLEDs. Notably, the <i>I</i>_on/<i>I</i>_off ratio increased during the initial storage period, reaching the highest measured values after two days for ZnO and three days for AZO, followed by a decrease at later storage times. Further electrical measurements revealed storage-associated changes, while qualitative time-of-flight secondary ion mass spectrometry (TOF-SIMS) profiles showed differences between pristine and archived aged specimens. These observations suggest possible interfacial or defect-related contributions. Overall, this study documents electrical evolution in simplified oxide/Al-containing RS structures during ambient storage with repeated measurements and generates hypotheses for future investigation into complete QLEDs.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13666779/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149183272","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":"Self-Consistent Study of the Electronic Properties of a Single Exciton in Nanoscopic CdSe Quantum Dots.","authors":"J A Gil-Corrales, C A Dagua-Conda, J A Vinasco, J Sierra-Ortega, Gene Elizabeth Escorcia-Salas, A L Morales, D B Hayrapetyan, C A Duque","doi":"10.3390/nano16191266","DOIUrl":"10.3390/nano16191266","url":null,"abstract":"<p><p>The electronic and excitonic properties of a single exciton confined in nanoscopic CdSe quantum dots with different geometries are investigated using a self-consistent Schrödinger-Poisson approach within the effective mass and Hartree approximations. Box, cylindrical, ellipsoidal, and square-based pyramidal quantum dots are considered, keeping their volume and cross-sectional area equal to isolate geometrical effects. The results show that increasing either the longitudinal (Lz) or transverse (<i>L</i>) dimension reduces the carrier confinement energies and produces a redshift of the exciton transition, with a stronger effect when the transverse dimensions are increased. The electron-hole Coulomb interaction decreases as the carrier wave functions become more spatially extended and remains strongly dependent on the quantum-dot geometry. Notably, the pyramidal structure exhibits the most pronounced geometry-dependent behavior, while the cylinder and ellipsoid show similar exciton transition energies because the energy associated with the strong confinement in the xy plane dominates over that associated with the weaker confinement along the <i>z</i> direction as the longitudinal parameter is increased. Similarly, the box and cylinder exhibit comparable exciton transition energies as the transverse parameter is increased. These results demonstrate that the shape and aspect ratio of nanoscopic quantum dots provide effective parameters for controlling their excitonic and optical properties.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13667246/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149182943","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":"Production of Bioethanol from <i>Artocarpus Integer</i> (Chempedak) Peel: An Approach Towards Clean Technology.","authors":"Yan Shan Ng, Asheild Clint Choisy, Kae Bin Lim, Zavier Ik Yang Jun, Benedict Raphael Soesanto, Sachin Sharma Ashok Kumar","doi":"10.3390/nano16191259","DOIUrl":"10.3390/nano16191259","url":null,"abstract":"<p><p>This research focuses on a sustainable way to reduce waste and generate renewable energy by converting Chempedak bio-waste into bioethanol. It undergoes several phases: feedstock collection and pretreatment (mechanical, acid and alkaline pretreatment), hydrolysis, fermentation, and distillation. The main goal of this project is to yield ethanol from 300 g Chempedak peel waste by using a functioning and cost-effective way. When processing the project, the distillation process was then changed to ethanol evaporation which used a rotary evaporator to extract the ethanol, as it is more effective. The final product for the ethanol yielded 73% for 41 mL. This work provided solutions to society to reduce waste, promote more sustainable energy solutions, and increase economic growth in industries by finding more sustainable options.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13666693/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149182519","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":"Bubble-Point Pressure Deviations and Metastable Nucleation in Nanoconfined CO₂-Shale Oil Systems: Effects of Temperature, Composition, Gas-Oil Ratio, and Pore-Scale Coupling.","authors":"Dongyan Qi, Jiawei Li, Qiang Liu, Shuang Wang, Siyuan Cui, Yue Lang, Jiayi Zhao, Xiaozhe Liang, Junjie Zhong","doi":"10.3390/nano16191260","DOIUrl":"10.3390/nano16191260","url":null,"abstract":"<p><p>Bubble-point behavior of shale oil under nanoconfinement is critical for understanding phase evolution during CO₂-enhanced shale-oil recovery. In this study, visual micro/nanofluidic PVT experiments were conducted to systematically investigate bubble-point pressure deviations of pentane-CO₂, hexadecane-CO₂, pentane/decane/hexadecane-CO₂, and shale oil-CO₂ systems. Measurements were performed at gas-oil ratios of 130 and 260 and temperatures of 65-125 °C using a 10 nm single-scale pore model and a coupled 10 μm-10 nm pore-network model. Experimental results were compared with theoretical predictions from a confinement-modified Peng-Robinson equation of state incorporating capillary pressure, surface adsorption, and critical-property shifts. Furthermore, a metastable nucleation limit was introduced to describe the experimentally observed phase-transition pressure below the equilibrium bubble-point boundary. Pronounced downward deviations toward the metastable region were observed in isolated 10 nm pores. For the pentane-CO₂ system at 65 °C and GOR = 130, the experimentally observed phase-transition pressure was approximately 3.5 MPa, compared with an equilibrium prediction of 4.3 MPa, corresponding to a relative deviation of 18.35%. The deviation decreased as temperature approached the critical region and was reduced at higher GOR. For example, at GOR = 260, the deviation of the hexadecane-CO₂ system decreased from 40.63% at 65 °C to 10.01% at 125 °C. Fluid composition also strongly affected confinement sensitivity, with heavier hydrocarbon systems exhibiting stronger shifts toward metastable behavior. In contrast, bubble-point pressures in the coupled 10 μm-10 nm network remained close to the equilibrium predictions of the micrometer-scale pores and deviated significantly from the metastable limit. For the shale oil-CO₂ system at 65 °C and GOR = 130, the relative deviation decreased from 29.77% in the isolated 10 nm pore model to only 2.43% in the coupled 10 μm-10 nm network. These results demonstrate that nanoconfined bubble-point behavior is governed by the coupled effects of thermodynamic conditions, fluid composition, metastability, and pore-scale connectivity.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13667126/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149183280","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":"TiSi₂ Phase Formation in Magnetron-Sputtered Ti Films on Silicon During Rapid Thermal Annealing.","authors":"Symaiyl Keiinbay, Kair Kh Nussupov, Nurzhan B Beisenkhanov, Alex A Volinsky","doi":"10.3390/nano16191258","DOIUrl":"10.3390/nano16191258","url":null,"abstract":"<p><p>Titanium thin films were deposited on crystalline silicon substrates by DC magnetron sputtering and annealed by rapid thermal processing under vacuum and nitrogen environments. X-ray diffraction, atomic force microscopy, and four-point probe measurements were used to evaluate phase formation and electrical properties. Annealing at 600 °C for 5 min in 10^-3 Pa high vacuum produces the C54-TiSi₂ phase, reducing sheet resistance from 56 Ω/sq to 1.94 Ω/sq. Lowering the synthesis temperature from 923 K to 873 K decreases radiative energy consumption by approximately 20%. In contrast, annealing in N₂ atmosphere yields Ti₅Si₄ and TiN instead of TiSi₂. A combined thermodynamic and diffusion model explains the observed phase selectivity under vacuum and nitrogen environments.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13666645/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149183024","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":"Quasi-Bound State in the Continuum-Driven Co-Frequency Polarization-Multiplexed Tunable Terahertz All Dielectric Metasurface.","authors":"Xilai Zhao, Jiahe Wang, Yifang Yuan, Jiangang Liang","doi":"10.3390/nano16191257","DOIUrl":"10.3390/nano16191257","url":null,"abstract":"<p><p>Quasi-bound states in the continuum (q-BICs) provide an effective approach for achieving strongly confined resonances in metasurfaces. However, the simultaneous realization of high-Q, polarization-multiplexed, and tunable resonances at a single frequency using a single resonant meta-atom remains challenging. Here, we numerically design and investigate a tunable all-dielectric terahertz (THz) metasurface consisting of a single asymmetric germanium (Ge) resonator by employing COMSOL Multiphysics. By introducing only one asymmetry parameter, the symmetry-protected BIC is transformed into a radiative q-BIC under two orthogonal linear polarizations. Through the coupling between the q-BIC and the intrinsic resonant mode, distinct interference responses are generated. Specifically, at the same frequency of 1.227 THz, a Fano resonance (Q = 606) is obtained under TE polarization, whereas an electromagnetically induced transparency (EIT)-like resonance (Q = 1105) appears under TM polarization. Owing to the tunable property of Ge, the two resonances can be actively modulated, achieving modulation depths of 96.7% and 99.1%, respectively. Furthermore, under TM polarization, the group delay can be continuously tuned from 0 to 259 ps by controlling the Ge conductivity. The proposed metasurface provides a compact platform for polarization-multiplexed and dynamically tunable THz photonic devices.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13667029/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149182725","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":"From Nature to Medicine: Overcoming the Limitations of Herbal Therapeutics for Pancreatic Cancer Treatment Based on Nanotechnology.","authors":"Ghazala Muteeb, Youssef Basem, Amira A Kotb, Naiera T Magdy, Ghannimah Yousef Alghuwainem, Mohammad Aatif, Mohd Farhan, Doaa S R Khafaga","doi":"10.3390/nano16191256","DOIUrl":"10.3390/nano16191256","url":null,"abstract":"<p><p>Pancreatic ductal adenocarcinoma (PDAC) remains one of the most lethal malignancies worldwide due to late-stage diagnosis, aggressive progression, and limited therapeutic responsiveness. Although herbal-derived bioactive compounds have demonstrated promising anticancer potential, their clinical application is often restricted by poor aqueous solubility, low bioavailability, rapid metabolic degradation, and insufficient tumor targeting. Nanomedicine has emerged as a promising platform to overcome these limitations through enhanced drug delivery, improved pharmacokinetics, and controlled release capabilities. In recent years, the integration of green nanotechnology with herbal therapeutics has gained increasing attention as a sustainable and biocompatible strategy for PDAC management. Green synthesis approaches utilizing plant extracts, microbial systems, and biopolymers provide environmentally friendly alternatives to conventional physicochemical nanoparticle (NP) fabrication methods while simultaneously enhancing biological functionality. This review aims to explore green nanotechnology-based strategies for improving the therapeutic potential of herbal-derived bioactive compounds in PDAC, with particular emphasis on nanoformulation approaches that enhance solubility, bioavailability, tumor targeting, and anticancer efficacy. In addition, the review discusses the advantages of green synthesis approaches, NP characterization strategies, translational barriers, biosafety considerations, and current clinical challenges. Overall, this review highlights the growing potential of green nanomedicine to improve herbal-based therapeutic strategies against PDAC while emphasizing the key obstacles that must be addressed to facilitate successful clinical translation.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13666960/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149183057","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":"Facile Synthesis of Zn/Fe@C Photocatalyst for Visible-Light-Driven H₂O₂ Production and Pollutant Degradation.","authors":"Osama K Basalam, Majed S Almalki, Muhammad Nadeem Arshad, Sher Bahadar Khan, Kalsoom Akhtar, Nujud Maslamani, Esraa M Bakhsh","doi":"10.3390/nano16191255","DOIUrl":"10.3390/nano16191255","url":null,"abstract":"<p><p>A zinc oxide-iron oxide embedded graphitic carbon (Zn/Fe@C) photocatalyst was successfully synthesized by pyrolysis of chitosan hydrogel impregnated with zinc and iron salts. Structural characterization confirmed the formation of a predominantly crystalline, multi-phase oxide system, while morphological analysis revealed a rough and heterogeneous surface with aggregated features. Elemental analysis further verified the incorporation of Zn and Fe species within the graphitic carbon matrix. The photocatalytic performance of the prepared material was evaluated through hydrogen peroxide (H₂O₂) production and dye degradation under simulated solar irradiation. Zn/Fe@C exhibited superior H₂O₂ production performance, achieving a maximum concentration of 2.9 mmol L^-1. The use of different alcohols as sacrificial agents revealed that 2-propanol significantly enhanced H₂O₂ generation, while increasing catalyst loading improved H₂O₂ production due to the availability of additional active sites. In dye degradation experiments, the photocatalyst demonstrated high efficiency toward the removal of representative organic dyes, including methylene blue, methyl orange, and acridine orange, with the latter showing the highest degradation efficiency of 96.6%. The effect of catalyst loading indicated that lower dosages resulted in optimal performance, which was attributed to improved light penetration and reduced aggregation effects. Control experiments confirmed that photocatalysis was the dominant mechanism over adsorption. Furthermore, increasing the metal precursor concentration enhanced photocatalytic activity, while the material maintained good reusability over multiple cycles. Furthermore, Zn/Fe@C was compared with Cu/Fe@C and Cu/Zne@C where Zn/Fe@C exhibited superior performance among the investigated photocatalysts in H₂O₂ production and dye degradation. Overall, the results highlight the potential of the developed Zn/Fe@C photocatalyst as a promising material for sustainable H₂O₂ production and efficient degradation of organic pollutants.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":"16 19","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13667153/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149182946","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}