Next Materials最新文献

{"title":"Green synthesis of carbon quantum dots and applications: An insight","authors":"Harmeet Kaur Kohli,&nbsp;Deepa Parab","doi":"10.1016/j.nxmate.2025.100527","DOIUrl":"10.1016/j.nxmate.2025.100527","url":null,"abstract":"<div><div>Carbon quantum dots (CQDs) are tiny(less than 10 nanometers size) carbon-based nanoparticles. Their exceptional chemical stability, photo luminescent properties and biocompatibility have opened up fascinating and diverse areas of applications in fields ranging from optoelectronics and photo catalysis to bio imaging and drug delivery. Synthesizing CQDs through varied techniques provides an area of intensive research, aiming to achieve well- controlled precision over their dimensions, structure, and optical properties. The bottom-up approaches as well as the top- down synthesis strategies are the commonly used methods. However these methods not being environment friendly, there has been shift towards greener methods of synthesis. The synthesis of CQDs from natural precursors is an innovative and sustainable approach in nanotechnology. Natural precursors offer a rich source of carbon making them inherently biocompatible due to which they are ideal for synthesis of CQDs with minimal environmental impact with enhanced potential for biomedical and environmental applications due to low or minimal toxicity of the starting materials. In this article we discuss the different methods of synthesis of CQDs and describe the advantages of synthesis from natural precursors as well as their varied applications.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100527"},"PeriodicalIF":0.0,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polyhexanide derivatives-reinforced silver-polytetrafluoroethylene coatings for enhanced antibacterial properties","authors":"Chenghao Yao,&nbsp;Jingyang Lin,&nbsp;Shuai Zhang","doi":"10.1016/j.nxmate.2025.100541","DOIUrl":"10.1016/j.nxmate.2025.100541","url":null,"abstract":"<div><div>In this study, an antibacterial silver-polytetrafluoroethylene (PTFE)-polyhexamethylene biguanide-surfactant (AgFP) coating was developed <em>via</em> electroless plating to combat biofilm-associated infections in medical devices. The incorporation of water-insoluble polyhexamethylene biguanide-surfactant enhanced the surface hydrophilicity of the coatings without compromising their lubricity, resulting in improved silver ion release. The AgFP coatings demonstrated sustained release of PHMB, leading to stronger antibacterial activity compared to silver (Ag) and silver-polytetrafluoroethylene (AgF) coatings, further reducing viable planktonic <em>Escherichia coli</em> by up to 98.1 % and biofilm formation by up to 92 % over three days. Cytotoxicity assays confirmed the coatings are biocompatible, positioning them as a promising strategy for preventing medical device-associated infections.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100541"},"PeriodicalIF":0.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"All chemically fabricated Co-Pt nanoparticle spin thermoelectric generator on plastic sheet","authors":"Yuichiro Kurokawa ,&nbsp;Keisuke Yamada ,&nbsp;Kenji Tanabe ,&nbsp;Hideki Matsui ,&nbsp;Hiromi Yuasa","doi":"10.1016/j.nxmate.2025.100520","DOIUrl":"10.1016/j.nxmate.2025.100520","url":null,"abstract":"<div><div>The anomalous Nernst effect (ANE) is a heat-charge conversion phenomenon based on magnetic metals that has been extensively studied for use in thermoelectric power generators and heat flow sensors. Thermoelectric power-generation devices require flexibility to accommodate a wide range of applications. In this study, we fabricated a thermoelectric power generator using Co-Pt nanoparticles (NPs) on plastic sheets via a chemical process. The ANE voltage in the Co-Pt NP-assembled film could be successfully observed. Additionally, the thermal conductivity of the NP-assembled film was lower than that of the thin film, owing to the large number of grain boundaries and voids that can scatter phonons. This is important for practical applications because the thermoelectric figure of merit is inversely proportional to thermal conductivity. These results indicate that Co-Pt NP-assembled films are promising materials because they suggest that a thermoelectric generator based on ANE can be fabricated using simple chemical processes that are advantageous for commercial use.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100520"},"PeriodicalIF":0.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of TiO2:Zn layer thickness on the performance of MAPbI3-based perovskite solar cells fabricated under open-air condition","authors":"Mezan Adly Al Qadri ,&nbsp;Eka Nurfani","doi":"10.1016/j.nxmate.2025.100537","DOIUrl":"10.1016/j.nxmate.2025.100537","url":null,"abstract":"<div><div>In this research, we study the effect of the layer thickness of 2 % mol Zn doped-TiO₂ layers on MAPbI₃-based perovskite solar cells (PSCs) performance. MAPbI₃-based PCSs have low efficiency. One of the limiters of the MAPbI₃-based PSC’s efficiency is the thickness of TiO₂ and its electrical properties. This research aims to enhance MAPbI₃-based PSC efficiency by optimizing the thickness of the Zn-doped TiO₂ layer used as the electron transport layer (ETL). The samples were prepared by depositing Zn-doped TiO₂ onto indium tin oxide (ITO) glass substrates using a spin coating technique, resulting in samples with 1 (S1), 3 (S2), 5 (S3), and 7 (S4) times of coating and with the structure ITO/TiO₂:Zn/MAPbI₃/graphite/ITO. I-V electrical testing revealed increased MAPbI₃-based PSC efficiency from 11.33 % to 11.54 %, 12.46 %, and 12.97 % for 1, 3, 5, and 7 times of coating, respectively. X-ray diffraction measurements indicated a tetragonal crystal structure with an increase in crystallite size from 17.92 nm to 18.85, 19.73, 20.67 nm for 1, 3, 5, and 7 times of coating, respectively. Scanning electron microscope (SEM) on surface section confirmed that the particle size of each sample is 17.84, 25.23, 28.3, and 30.90 nm for 1, 3, 5, and 7 times of coating, respectively. Based on SEM on cross-sectional, the thickness of each sample is 346, 466, 569, and 695 nm, for 1, 3, 5, and 7 times of coating, respectively. UV–VIS spectroscopy analysis a decrease in the band gap from 3.3 eV to 3.25 eV, 3.2 eV, and 3.15 eV for 1, 3, 5, and 7 times of coating, respectively. These findings highlight the potential for improving MAPbI₃-based PSC efficiency by optimizing Zn-doped TiO₂ layer thickness, with significant implications for MAPbI₃-based PSC fabrication in open-air environments.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100537"},"PeriodicalIF":0.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Selenium-incorporated charge transfer states for room-temperature phosphorescence: A metal-free approach for high-performance OLEDs","authors":"Zijian Chen,&nbsp;Qing Gu,&nbsp;Mengke Li,&nbsp;Shi-Jian Su","doi":"10.1016/j.nxmate.2025.100539","DOIUrl":"10.1016/j.nxmate.2025.100539","url":null,"abstract":"<div><div>Enhancing device efficiency is crucial for making OLED technology commercially competitive, and this relies on maximizing exciton utilization. Phosphorescent materials, capable of utilizing both singlet and triplet excitons, have been developed to achieve nearly unity internal quantum efficiency. However, conventional phosphorescent materials rely on heavy metals such as iridium and platinum, which are costly and raise environmental concerns. In response, purely organic phosphorescent materials are being explored as sustainable alternatives that are free from precious metals. This study introduces a selenium-based purely organic emitter, SeXPXSe, featuring charge transfer states that enhance spin-orbit coupling, thereby promoting efficient intersystem crossing and triplet exciton utilization. SeXPXSe achieves a high phosphorescence quantum yield of 60 % and a phosphorescence lifetime of 2.6 ms in doped film. OLED device incorporating SeXPXSe as emitter demonstrates a maximum external quantum efficiency up to 14.7 %, along with stable electroluminescence spectra and high exciton utilization, highlighting the potential of purely organic phosphorescent materials as promising candidates for environmentally friendly and high-performance OLED applications.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100539"},"PeriodicalIF":0.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rutile-quartz separation in benzohydroxamic acid and sodium oleate flotation systems","authors":"Zhiguo Yu ,&nbsp;Lihua Peng ,&nbsp;Bin Zhang ,&nbsp;Peng Zou ,&nbsp;Zechen Hu ,&nbsp;Yongsheng Ji ,&nbsp;Deren Yang ,&nbsp;Xuegong Yu","doi":"10.1016/j.nxmate.2025.100525","DOIUrl":"10.1016/j.nxmate.2025.100525","url":null,"abstract":"<div><div>Despite being a popular rutile-quartz mineral separation method, traditional flotation is often inefficient, expensive, and causes environmental pollution. In this study, we propose a novel method for the efficient flotation-based separation of rutile from quartz by using a combination of benzohydroxamic acid (BHA) and sodium oleate (NaOL). By utilizing X-ray powder diffraction (XRD), X-ray fluorescence spectrometry (XRF), ultraviolet-visible absorption (UV-Vis) spectroscopy, Fourier-transformed infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and zeta potential analysis, we investigated the mineral flotation behavior and collector adsorption mechanism. The single mineral flotation experiments indicated that BHA and NaOL could effectively promote rutile floating, with up to 84.5 % flotation recovery at pH 9. At a rutile:quartz mass ratio of 1:3, the titanium oxide (TiO₂) grade reached 61.5 %, with a rutile flotation recovery of 77.0 % for the froth products. We finally established a dual-mode flotation model to explain the flotation separation mechanism of rutile and quartz using the combined BHA+NaOL collector.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100525"},"PeriodicalIF":0.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143388071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Innovative advances in microwave materials: Tailoring Zn(1-x)TixAl2O4 nanoceramic composites for improved wireless applications","authors":"Srilali Siragam","doi":"10.1016/j.nxmate.2025.100528","DOIUrl":"10.1016/j.nxmate.2025.100528","url":null,"abstract":"<div><div>Researchers synthesized Zn_{(1-<em>x</em>)}Ti_<em>x</em>Al₂O₄ nanoceramic composites (<em>x</em> = 0.0, 0.1, 0.3, 0.5) using the sol-gel method to develop compact wireless patch antennas. Structural analyses (X-ray diffraction (XRD), Raman spectroscopy (Raman), Transmission electron microscopy (TEM), Selective area diffraction (SAED)) confirmed ZnAl₂O₄ and TiO₂ phases, with TiO₂ enhancing surface roughness, crystallite size (16 nm at <em>x</em> = 0.5), and density. TEM revealed spherical grains (∼17.1 nm), and increasing TiO₂ content improved dielectric permittivity (ε_r: 22.23–25.41), crucial for antenna miniaturization. Patch antenna prototypes demonstrated excellent performance at S-band frequencies, with return losses ranging from −18.06 dB to −26.13 dB and VSWR &lt; 2, highlighting their suitability for wireless communication.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100528"},"PeriodicalIF":0.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143388072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Progress in prediction of photocatalytic CO2 reduction using machine learning approach: A mini review","authors":"Md Mohshin Ali ,&nbsp;Md. Arif Hossen ,&nbsp;Azrina Abd Aziz","doi":"10.1016/j.nxmate.2025.100522","DOIUrl":"10.1016/j.nxmate.2025.100522","url":null,"abstract":"<div><div>The rapid progression of industrial revolution has contributed to an increase in greenhouse gases (GHGs) emission, particularly carbon dioxide (CO₂), exacerbating global warming and placing unwanted pressure on limited energy resources, ultimately causing energy scarcity. Achieving carbon neutrality has been recognized as one of the most pressing goals in addressing the global greenhouse effect. The photocatalytic conversion of CO₂ into sustainable, high-value chemicals and fuels has emerged as an effective strategy to combat the issues of global warming and energy scarcity on a worldwide scale. However, the traditional trial-and-error approach renders the process costly, time-intensive, and challenging to understand the comprehension of the underlying mechanisms governing reaction pathways, complicating the discovery of groundbreaking photocatalysts with improved performance for photocatalytic CO₂ reduction (PC-CO₂R). Emerging Machine learning (ML) techniques have significantly improved the predictive performance and operational efficiency of photocatalytic systems. These models can handle extensive experimental datasets, optimize operational parameters, and provide insights into CO₂ reduction (CO₂R) mechanisms. ML models also simplify the material selection, reducing experimental validation time and thereby improving the overall efficiency of PC-CO₂R. This comprehensive review provides an insight into the current progress in ML-guided prediction of PC-CO₂R. The fundamentals of PC-CO₂R and the significance of utilizing ML models as a facilitative tool in photocatalysis are critically discussed in this review. Furthermore, the review outlines the commonly employed ML algorithms, presents recent progress, and identifies crucial parameters influencing PC-CO₂R efficiency. The study also highlights the opportunities and challenges associated with the design of ML-assisted photocatalysts, which need to be addressed to fully harness the potential of ML for converting CO₂ into sustainable energy sources.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100522"},"PeriodicalIF":0.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aniline dissociation reaction-time developed surface composites on severe plastic deformed aluminum through surface mechanical alloying","authors":"Mohamed Refaat Ebrahim M. R. Ebrahim ,&nbsp;Emad Al Ashkar Emad Al Ashkar","doi":"10.1016/j.nxmate.2025.100515","DOIUrl":"10.1016/j.nxmate.2025.100515","url":null,"abstract":"<div><div>Time dependent dissociation-reactions were detected due to aniline dissociation though surface mechanical alloying ‘SMA’ on pre-mechanically activated aluminum. SMA time increase from 0 to 10 min SMA in steps of 2.5 min have formed Al_2.85O_3.45N_0.55 oxynitride stable compound phase until 10 min-SMA. Unexpectedly, the organometallic tetraaluminum sesquihydrazide C₁₂H₄₈Al₄N₁₂ complex compound was formed with previously formed Al_2.85O_3.45N_0.55 at room-temperature after 10 min-SMA on Al substrate with aniline. Considering the maximum 10 min-SMA time processed Al surface contains all previously formed phases, where each formed phase after 2.5, 5 and 7.5min-SMA should have participated in forming the following phases in next SMA time range. Surface dissociation-reaction time development was detected and followed using X-Ray Diffraction at a grazing incidence 'GIXRD' qualitative identification. SiO₂, FeN, TiAl, Al₄Cu₉ and Al_35.472Cu_47.792 phases were identified due to impurities existence, those were changing their depth from Al substrate’s surface as SMA time increases. Concluding that Al-Aniline dissociation-reaction time dependent surface composites containing aluminum nitrides as well as organometallics can be obtained by controlling Al substrate impurities content, surface nano-crystallization through mechanical activation and ‘SMA’ processing time.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"8 ","pages":"Article 100515"},"PeriodicalIF":0.0,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coal to graphene-based materials: Evaluating coal as a potential feedstock to pave way for large scale production of graphene and related materials, a review","authors":"Boitshepho Ivy Marakalala ,&nbsp;Victor K. Manisa ,&nbsp;Tumeletso Lekgoba ,&nbsp;Freeman Ntuli ,&nbsp;Vepika Kandjou","doi":"10.1016/j.nxmate.2025.100519","DOIUrl":"10.1016/j.nxmate.2025.100519","url":null,"abstract":"<div><div>Of recent, coal and other abundant carbon-rich materials are emerging as potential feedstocks and precursors in the production of graphene-based materials such as pristine graphene and graphene oxide and reduced graphene oxide. Considering the abundance of coal reserves globally, using coal as a feedstock in the production of graphene-based materials offers potential in large scale production and paving a way towards the realisation of industrial application of these versatile nanomaterials. The paper explores the prospective of coal as a raw material for graphene and graphene oxide production, by evaluating the quality of the graphene and graphene oxide produced in terms of the aspect ratio, singularity of the sheets and the general physicochemical characteristics. The novelty of the production of graphene-based material from coal means that limited works exist in this area hence the significance of this review. The review is also geared towards valorising various coal type feedstocks including stock piling coal fines in various regions especially in Sub-Saharan Africa. An overview of possible applications of the resultant coal-based graphene and graphene oxide are reviewed.</div></div>","PeriodicalId":100958,"journal":{"name":"Next Materials","volume":"7 ","pages":"Article 100519"},"PeriodicalIF":0.0,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}