Materials Chemistry and Physics最新文献

{"title":"Template effect of α-Cr2O3 on lowering nucleation energy barrier of α-Al2O3 coating on WC-based cemented carbide by first principles and thermodynamic calculation","authors":"Lijun Xian ,&nbsp;Hongyuan Fan ,&nbsp;Guang Xian ,&nbsp;Lin Li ,&nbsp;Yingzhi Luo ,&nbsp;Haibo Zhao","doi":"10.1016/j.matchemphys.2025.130921","DOIUrl":"10.1016/j.matchemphys.2025.130921","url":null,"abstract":"<div><div>α-Al₂O₃ coating occupies a significant position in the domain of cutting tool coatings due to its superior thermal stability, exceptional wear resistance, and excellent corrosion resistance. In order to further broaden the application of α-Al₂O₃ coating, α-Al₂O₃ coating is deposited using the PVD method to circumvent the drawbacks of high temperature deposition associated with the CVD preparation and phase transformation-induced cracking. α-Cr₂O₃ layer has been employed as a nucleation template for α-Al₂O₃ coating to reduce the deposition temperature. This study investigates the role of α-Cr₂O₃ layer as a template in the nucleation process of α-Al₂O₃ coating through first-principles and thermodynamic calculations. The results show that the maximum nucleation energy barrier of α-Cr₂O₃(0001) on WC substrate is 23.00 eV/ų, whereas that of α-Al₂O₃(0001) on the same substrate ranges from 43.56 to 47.39 eV/ų. Besides, the nucleation energy barrier of α-Al₂O₃(0001) on α-Cr₂O₃(0001) is only 2.18 eV/ų. Therefore, from the thermodynamic perspective, it is easier to obtain a crystalline α-Al₂O₃ coating by depositing an α-Cr₂O₃(0001) template layer on WC-based cemented carbide substrate first and then depositing α-Al₂O₃ coating on top of the template layer. These findings provide theoretical support for experimentally expanding the utilization of template effect of α-Cr₂O₃ layer in nucleation of α-Al₂O₃ coating.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"341 ","pages":"Article 130921"},"PeriodicalIF":4.3,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three-dimensional C–MoS2–NiFeO@NF nanohybrids as highly efficient bifunctional catalysts for overall water splitting","authors":"Wenyue Zhang ,&nbsp;Jing Sui ,&nbsp;Guojin Sun ,&nbsp;Ziqin Li ,&nbsp;Qian Zhang ,&nbsp;Jianhua Yu ,&nbsp;Zhixing Gan ,&nbsp;Lina Sui ,&nbsp;Lifeng Dong","doi":"10.1016/j.matchemphys.2025.130914","DOIUrl":"10.1016/j.matchemphys.2025.130914","url":null,"abstract":"<div><div>Creating cost-effective dual-functional catalysts that exhibit superior performance and durability is essential for the advancement of water splitting technology. In this study, C–MoS₂–NiFeO composites were fabricated as bifunctional electrocatalysts on nickel foam (NF) through a combination of hydrothermal synthesis and furnace calcination. The resulting three-dimensional structure provides an abundance of catalytically active sites and enhances conductivity during electrochemical processes. As a result, the C–MoS₂–NiFeO@NF electrode showcased remarkable performance in the oxygen evolution reaction, achieving a minimal overpotential of 260 mV at a current density of 100 mA cm⁻² and exhibiting a Tafel slope of 30 mV·dec⁻¹. Moreover, the material displayed exceptional activity for the hydrogen evolution reaction, necessitating just 200 mV of overpotential to reach a current density of 100 mA cm⁻², along with a Tafel slope of 55 mV·dec⁻¹. These results underscore the potential of C–MoS₂–NiFeO@NF as a promising dual functional catalyst for overall water splitting.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"341 ","pages":"Article 130914"},"PeriodicalIF":4.3,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143882299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Scalable production of engineered bi-functional MnCO3 materials derived from low-grade resources for supercapacitive and OER application","authors":"Megha Dash ,&nbsp;Satyaswini Sahu ,&nbsp;T. Pavan Kumar ,&nbsp;Mamata Mohapatra","doi":"10.1016/j.matchemphys.2025.130909","DOIUrl":"10.1016/j.matchemphys.2025.130909","url":null,"abstract":"<div><div>Manganese-based electrode materials represent a burgeoning area of research, as manganese is earth-abundant, exhibits variable oxidation state and inexpensive. Additionally, it's conductivity, structural stability, purity, and facile bulk production from indigenous and affordable resources can pave a pathway for the development of sustainable multifunctional energy platforms. Herein, we propose the development of manganese carbonate (rMC) as bifunctional electroactive material from LGMOs using both inorganic and organic lixiviant. In the current process, manganese is selectively leached into the solution (&gt;90 %) while passivating iron and other impurities. The processed leached liquor is further utilized to recover rMC via a single step facile chemical precipitation method. As obtained rMC is utilized as electroactive material for both supercapacitor and oxygen evolution reactions (OER) application. At 1 A g⁻¹, rMC showed high discharge specific capacitance of 194 F g⁻¹. It also showed a capacitance retention of 90.7 % for 5000 GCD cycles at 5 A g^-1. Further, a symmetric supercapacitor device was fabricated to establish the efficiency of rMC being used for practical applications. It showed discharge specific capacitance of 77 F g⁻¹ at 0.3 A g⁻¹. In terms of OER, rMC exhibits Tafel slope of 151 mV dec⁻¹ at 10 mA cm⁻². The present study shows the applicability of the low-grade resources to generate value added electrochemical bifunctional material for both supercapacitor and OER applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"341 ","pages":"Article 130909"},"PeriodicalIF":4.3,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Passivation effect of potassium cation-18-crownether-6 on FAPbI3(001) perovskite surface: a first-principles study","authors":"Qiuli Zhang ,&nbsp;Yu Zhuang ,&nbsp;Abuduwayiti Aierken ,&nbsp;Shurong Wang ,&nbsp;Qiaogang Song ,&nbsp;Qian Wang ,&nbsp;Youbo Dou ,&nbsp;Hongwen Zhang ,&nbsp;Wenjing Lu ,&nbsp;Shiyan Yang","doi":"10.1016/j.matchemphys.2025.130917","DOIUrl":"10.1016/j.matchemphys.2025.130917","url":null,"abstract":"<div><div>Passivation treatment is an important way to reduce the defect density of perovskites, which has been proven to be highly effective in improving the long-term stability and high performance of perovskite solar cells (PSCs). In this work, the passivation effects of potassium cation-18-crownether-6 (18C6–K⁺) molecules on the surface defects of FAPbI₃(001) were investigated by using first-principles calculations. The adsorption energy of 18C6–K⁺ small molecule on the defective surface were calculated to be negative, indicating stable adsorption on the FAPbI₃(001) surface. Calculations of defect energy levels showed that V_I and I_i defects are shallow-level defects, while I_Pb, Pb_I, and Pb_i defects are deep-level defects. And V_Pb acts as a deep-level defect on the PbI₂-terminated surface, while as a shallow-level defect on the FAI-terminated surface. After 18C6–K⁺ passivation, the defect formation energies of vacancy (V_I), interstitial (Pb_i), and antisite (Pb_I) increased, suggesting inhibition of defects formation on the FAPbI₃(001) surface. Work function analysis reveals that the introduction of 18C6–K⁺ molecules facilitates electron transitions by reducing the work function and enhancing the alignment of energy levels. The TDOS analysis, combined with CDD calculations, indicates that the passivation mechanism by 18C6–K+ is predominantly due to interactions between iodine (I) and ether (C–<em>O</em>–C), rather than between lead (Pb) and ether. This process primarily serves to eliminate defect states and stabilize the perovskite surface structure. Thus, 18C6–K⁺ molecule was suggested to be effective in passivating FAPbI₃ surface defects and enhancing the stability of perovskite solar cells.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"341 ","pages":"Article 130917"},"PeriodicalIF":4.3,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143860483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailoring optical, dielectric, and magnetic properties of highly efficient visible-light LaFeO3 photocatalysts via Ca/Ba mono and Co-doping","authors":"Mohammed Ahmed Wahba ,&nbsp;Mohamed Masoud Gad Abdelkader ,&nbsp;E.H. El-Mossalamy","doi":"10.1016/j.matchemphys.2025.130916","DOIUrl":"10.1016/j.matchemphys.2025.130916","url":null,"abstract":"<div><div>Lanthanum ferrite (LaFeO₃), a multifunctional perovskite, was systematically modified via A-site mono- and co-doping with Ca and Ba to enhance its structural, optical, magnetic, and photocatalytic properties. XRD confirmed successful doping, with Ba-doped samples showing the largest lattice expansion and Ca-doped samples exhibiting high crystallinity. SEM and TEM revealed nanosized materials and the doping-induced morphological variations, with co-doped samples displaying increased agglomeration and structural modifications. FTIR indicated shifts in Fe–O vibrations, suggesting bond strength alterations. XPS analysis of the C2B2LF (2 % Ca and 2 % Ba) sample confirmed the presence of Ca and Ba, verifying successful doping, and indicated the oxidation state of Fe as a mix of Fe³⁺ and Fe⁴⁺, supporting its role in charge transfer processes. Optical analysis showed reduced band gaps (1.83–2.13 eV), with co-doped C2B2LF achieving the lowest value (1.83 eV) and enhanced visible-light absorption. Doping also influenced dielectric and magnetic properties, with BLF (4 %Ba-doped LaFeO₃) showing the highest saturation magnetization (19.07 emu/g) and lowest coercivity, while CLF (4 %Ca-doped LaFeO₃) exhibited the highest coercivity (194.46 Oe). C2B2LF demonstrated superior photocatalytic performance, achieving nearly complete dye degradation within 120 min, attributed to optimized band structure, improved charge separation, and enhanced reactive oxygen species formation. These results highlight the potential of doped LaFeO₃ for photocatalytic and environmental applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"341 ","pages":"Article 130916"},"PeriodicalIF":4.3,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation of carbon nanotube polymeric membranes with cross-linkable and antimicrobial agents for water applications","authors":"Georgia C. Lainioti ,&nbsp;Ioannis Anastasopoulos ,&nbsp;Amaia Soto Beobide ,&nbsp;George A. Voyiatzis ,&nbsp;Joannis K. Kallitsis","doi":"10.1016/j.matchemphys.2025.130895","DOIUrl":"10.1016/j.matchemphys.2025.130895","url":null,"abstract":"<div><div>The incorporation of carbon nanotubes (CNTs) along with cross-linkable and antimicrobial agents into polymeric membranes represents a cutting-edge approach to enhance water purification. Nevertheless, CNT-polymeric membranes should accomplish uniform dispersion along with stable integration of CNTs in the membrane matrix, as at the same time should ensure antimicrobial functionality and high-water flux. Current reports have studied the incorporation of CNTs into membranes, but concerns like poor dispersion, aggregation, and lack of effective cross-linking mechanisms continue to be hurdles in the optimization of membranes’ performance.</div><div>In this work, different vinylic monomers -either hydrophobic methyl methacrylate (MMA) or cross-linkable glycidyl methacrylate (GMA)- were polymerized on properly modified CNTs using Atom Transfer Radical Polymerization (ATRP). The resulting CNTs, either multiwalled or thin-multiwalled, were embedded into porous PET/PES (polyethylene terephthalate/polyethersulfone) membranes. The influence of the attached groups on their dispersion efficiency and embedment into the pores was studied. The polymer-functionalized CNTs were further modified by incorporating antimicrobial quaternized salts through non-covalent attachment. The cross-linking reaction between CNTs modified with epoxy groups was thoroughly tested using ethylene diamine (EDA) as a cross-linker for the reaction between epoxide groups of GMA attached to CNT surfaces and the amines of EDA. Various cross-linking methods and the parameters temperature, reaction time and phase of cross-linker were tested through thermogravimetric analysis (TGA) and Scanning Electron Microscopy (SEM) to establish the optimal conditions. The results revealed successful embedding of CNTs with good distribution, as observed in the cross-section of the membranes, and effective cross-linking between GMA moieties and amines in the membrane pores. The incorporation and the cross-linking of CNTs into the PES membrane resulted in increased water flux, up to 572.4 L/m²h, of similar order of magnitude as those reported in relevant CNTs embedded membranes. The systematic optimization of the cross-linking conditions establishes a more robust method in terms of CNTs integration related to conventional embedding methods.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"341 ","pages":"Article 130895"},"PeriodicalIF":4.3,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correlative morphology effects on surface characteristics of hydrophilic h-MoS2 thin films","authors":"Prachi Gurawal ,&nbsp;Somdatta Singh ,&nbsp;Gaurav Malik ,&nbsp;Ravikant Adalati ,&nbsp;Mohit Madaan ,&nbsp;V.K. Malik ,&nbsp;Ramesh Chandra","doi":"10.1016/j.matchemphys.2025.130870","DOIUrl":"10.1016/j.matchemphys.2025.130870","url":null,"abstract":"<div><div>Recently, two-dimensional transition metal dichalcogenides (TMDs) materials have gained significant attention due to their potential applications in gas sensing, energy storage, and optoelectronics. One of the key advantages of TMDs lies in their tunable properties with growth parameters, thereby improving the performance of specific applications. This study focuses on the impact of sputtering time on the growth of different surface morphologies. Molybdenum disulfide (MoS₂) thin films have been synthesized on a silicon (100) substrate using a DC sputtering technique to evaluate the effects of growth parameters. The findings indicate the sputtering time-dependent surface morphologies, as confirmed by field emission scanning electron microscopy (FE-SEM) and atomic force microscopy (AFM) results. An increase in the sputtering time leads to a transformation of the nanosphere surface structure into a nanoworms structure due to the surface particle aggregations. The X-ray diffraction (XRD) results confirm the hexagonal phase (H) of MoS₂, while the Raman measurement validates the formation of multilayer thin films. Furthermore, the wetting properties of the resulting structures are evaluated using contact angle tests, and the experimental results are validated using the theoretical Wenzel and Cassie models. Consequently, the growth parameters-based tunability in surface structure may significantly enhance the performance of TMDs-based materials in practical applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"341 ","pages":"Article 130870"},"PeriodicalIF":4.3,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"“Cost-effective chitosan-coated cellulosic supports, functionalized with zerovalent nanoparticles for sustainable hydrogen generation\"","authors":"Nusrat Shaheen ,&nbsp;Wajahat Sajjad ,&nbsp;Saima Daud ,&nbsp;Tanzeela Fazal ,&nbsp;Asma Khan ,&nbsp;Fayaz Ali ,&nbsp;Amal M. Al-Mohaimeed ,&nbsp;Wedad A. Al-onazi","doi":"10.1016/j.matchemphys.2025.130890","DOIUrl":"10.1016/j.matchemphys.2025.130890","url":null,"abstract":"<div><div>The preparation method for the synthesis of cost-effective support coated cellulosic composites, decorated with zerovalent nanoparticles is reported in this study. For sustainable hydrogen generation, metallic nanoparticles (MNPs) supported on chitosan coated cellulosic tissue strips were fabricated by treating with metal ions i.e. Ag(I), Cu(II) and Fe(III) solution followed by treatment with sodium borohydride (NaBH₄). NaBH₄. After subjecting to characterization techniques including; X-Ray Diffraction (XRD), Scanned Electron Microscopy (SEM) and Fourier Transform Infrared (FTIR) spectroscopy, prepared samples were then tested as catalysts for hydrogen generation in methanolysis of NaBH_4. Results showed that these two naturals, abundant, environment friendly polymers (cellulose, chitosan) can readily adsorbed MNPs by the method employed in current study. And the synthesized MNPs supported on polymer composites were proven good catalysts for the methanolysis of NaBH₄ reaction and were effortlessly recyclable by just taking out from the reaction matrix. Among the three tested metals, Cu based catalysts showed best performance as the reaction which took more than 20 min to complete without catalyst was completed in just 1.27 min, as compared to 1.48 and 1.67 min for Ag and Fe based catalyst respectively.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"341 ","pages":"Article 130890"},"PeriodicalIF":4.3,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring the effect of Ti and Al contents on the microstructural, mechanical, and corrosion resistance features of VNbMoTaWTiAlN refractory high entropy alloy coatings","authors":"Bih-Show Lou ,&nbsp;Chia-Lin Li ,&nbsp;Muthaiah Annalakshmi ,&nbsp;Tzu-Yu Hung ,&nbsp;Jyh-Wei Lee","doi":"10.1016/j.matchemphys.2025.130901","DOIUrl":"10.1016/j.matchemphys.2025.130901","url":null,"abstract":"<div><div>High entropy alloys (HEAs) are a class of novel multicomponent alloys comprised of five or more elements in a single phase through entropy maximization. This work prepared five refractory-based (VNbMoTaWTiAl)N nitrogen-doped high entropy ally (RHEAN) coatings with various Ti and Al chemical compositions through a high power impulse magnetron sputtering technique. The effects of variable atomic percentage ratios of Ti and Al on the chemical composition, phase, microstructure, mechanical properties, and anticorrosion behaviors of the RHEAN coatings were studied. The work showed that all the coatings were amorphous due to the high ion bombardment effect by the high-energy HiPIMS plasma. The crystalline structures of coatings were destroyed and changed into amorphous by such high-energy ion bombardments. The variation of input powers of the TiAl target altered the film thickness, chemical composition, mechanical and corrosion resistance of the coatings. Meanwhile, the coating with the Ti, Al, and N ratios of 1.2, 0.9, and 1.0 showed the highest hardness of 14.6 GPa and a corrosion resistance 6.33 times better than bare 304 stainless steel, which presented a potential candidate for crucial corrosive environment applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"341 ","pages":"Article 130901"},"PeriodicalIF":4.3,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PEGylated Fe3O4@Ti3C2 MXene quantum dots for in vitro photothermal cancer therapy","authors":"Khuram Shahzad ,&nbsp;Muhammad Ali Abbasi ,&nbsp;Sadaf Mushtaq ,&nbsp;Muhammad Farzik Ijaz ,&nbsp;Denis V. Danilov ,&nbsp;Nageen Naz ,&nbsp;Anna Pestereva ,&nbsp;Muhammad Zaman ,&nbsp;Naseeb Ahmad ,&nbsp;Anna Orlova","doi":"10.1016/j.matchemphys.2025.130888","DOIUrl":"10.1016/j.matchemphys.2025.130888","url":null,"abstract":"<div><div>The combination of nanotechnology and biomedicine has led to transformative advancements in medical science, particularly in the field of Photothermal Therapy (PTT) for anticancer treatment. Current study presents Iron oxide nanoparticles Fe₃O₄ integrated with Ti₃C₂ MXene quantum dots (MQDs) as an efficient system for the anticancer PTT treatment. Core-shell Fe₃O₄@MQDs nanocomposites were synthesized using chemical methods, and then coated with Polyethylene Glycol (PEG) to enhance their colloidal stability and biocompatibility. The physicochemical and morphological properties of Fe₃O₄@MQDs-PEG were investigated by X-rays diffraction (XRD), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM), and transmission electron microscopy (TEM). The Fe₃O₄@MQDs-PEG nanocomposites achieved notable photothermal conversion efficiency (ղ) of up to 37.7 % within 10 min when exposed to an 808 nm NIR laser. Potential for PTT was determined <em>in vitro</em> using HepG2 cells, where a dose and NIR dependent (808 nm for 8 min) cytotoxic response was achieved with an IC₅₀ value of 14.04 μg/ml. Also, hemolysis assay validated safety of Fe₃O₄@MQDs-PEG for intravenous applications. Overall, Fe₃O₄@MQDs-PEG represents a promising class of nanocomposites for photothermal therapeutic applications <em>in vitro</em>.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"341 ","pages":"Article 130888"},"PeriodicalIF":4.3,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}