TY - JOUR AU - Sári, Daniella AU - Ferroudj , Aya AU - Semsey, Dávid AU - El-Ramady, Hassan AU - Brevik, Eric C. AU - Prokisch, József TI - Tellurium and Nano-Tellurium: Medicine or Poison? JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 14 PY - 2024 IS - 8 PG - 24 SN - 2079-4991 DO - 10.3390/nano14080670 UR - https://m2.mtmt.hu/api/publication/34788699 ID - 34788699 AB - Tellurium (Te) is the heaviest stable chalcogen and is a rare element in Earth’s crust (one to five ppb). It was discovered in gold ore from mines in Kleinschlatten near the present-day city of Zlatna, Romania. Industrial and other applications of Te focus on its inorganic forms. Tellurium can be toxic to animals and humans at low doses. Chronic tellurium poisoning endangers the kidney, liver, and nervous system. However, Te can be effective against bacteria and is able to destroy cancer cells. Tellurium can also be used to develop redox modulators and enzyme inhibitors. Soluble salts that contain Te had a role as therapeutic and antimicrobial agents before the advent of antibiotics. The pharmaceutical use of Te is not widespread due to the narrow margin between beneficial and toxic doses, but there are differences between the measure of toxicity based on the Te form. Nano-tellurium (Te-NPs) has several applications: it can act as an adsorptive agent to remove pollutants, and it can be used in antibacterial coating, photo-catalysis for the degradation of dyes, and conductive electronic materials. Nano-sized Te particles are the most promising and can be produced in both chemical and biological ways. Safety assessments are essential to determine the potential risks and benefits of using Te compounds in various applications. Future challenges and directions in developing nano-materials, nano-alloys, and nano-structures based on Te are still open to debate. LA - English DB - MTMT ER - TY - JOUR AU - Poinsot, V. AU - Pizzinat, N. AU - Ong-Meang, V. TI - Engineered and Mimicked Extracellular Nanovesicles for Therapeutic Delivery JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 14 PY - 2024 IS - 7 SN - 2079-4991 DO - 10.3390/nano14070639 UR - https://m2.mtmt.hu/api/publication/34802642 ID - 34802642 N1 - Export Date: 21 April 2024 Correspondence Address: Poinsot, V.; Inserm, France; email: verena.poinsot@inserm.fr LA - English DB - MTMT ER - TY - JOUR AU - Vajtai, Lili AU - Nemes, Norbert Marcel AU - Morales, Maria del Puerto AU - Molnár, Kolos AU - Pinke, Balazs Gabor AU - Simon, Ferenc TI - Incidence of the Brownian Relaxation Process on the Magnetic Properties of Ferrofluids JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 14 PY - 2024 IS - 7 PG - 15 SN - 2079-4991 DO - 10.3390/nano14070634 UR - https://m2.mtmt.hu/api/publication/34801218 ID - 34801218 N1 - Department of Physics, Institute of Physics, HUN-REN-BME Condensed Matter Research Group, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest, H-1111, Hungary Departamento de Física de Materiales, Universidad Complutense de Madrid, Madrid, 28040, Spain Department of Nanoscience and Nanotechnology, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Madrid, 28049, Spain Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest, H-1111, Hungary HUN–REN–BME Research Group for Composite Science and Technology, Műegyetem rkp. 3., Budapest, H-1111, Hungary MTA-BME Lendület Sustainable Polymers Research Group, Műegyetem rkp. 3., Budapest, H-1111, Hungary Institute for Solid State Physics and Optics, HUN-REN Wigner Research Centre for Physics, P.O. Box 49, Budapest, H-1525, Hungary Export Date: 22 April 2024 Correspondence Address: Nemes, N.M.; Departamento de Física de Materiales, Spain; email: nmnemes@ucm.es AB - Ferrofluids containing magnetic nanoparticles represent a special class of magnetic materials due to the added freedom of particle tumbling in the fluids. We studied this process, known as Brownian relaxation, and its effect on the magnetic properties of ferrofluids with controlled magnetite nanoparticle sizes. For small nanoparticles (below 10 nm diameter), the Neel process is expected to dominate the magnetic response, whereas for larger particles, Brownian relaxation becomes important. Temperature- and magnetic-field-dependent magnetization studies, differential scanning calorimetry, and AC susceptibility measurements were carried out for 6 and 13.5 nm diameter magnetite nanoparticles suspended in water. We identify clear fingerprints of Brownian relaxation for the sample of large-diameter nanoparticles as both magnetic and thermal hysteresis develop at the water freezing temperature, whereas the samples of small-diameter nanoparticles remain hysteresis-free down to the magnetic blocking temperature. This is supported by the temperature-dependent AC susceptibility measurements: above 273 K, the data show a low-frequency Debye peak, which is characteristic of Brownian relaxation. This peak vanishes below 273 K. LA - English DB - MTMT ER - TY - JOUR AU - Eskandari, Somayeh AU - Koltai, János AU - László, István AU - Kürti, Jenő TI - Molecular Dynamics Study of Nanoribbon Formation by Encapsulating Cyclic Hydrocarbon Molecules inside Single-Walled Carbon Nanotube JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 14 PY - 2024 IS - 7 PG - 19 SN - 2079-4991 DO - 10.3390/nano14070627 UR - https://m2.mtmt.hu/api/publication/34777533 ID - 34777533 N1 - Department of Biological Physics, Eötvös University, Budapest, 1117, Hungary Department of Theoretical Physics, Budapest University of Technology and Economics, Budapest, 1111, Hungary Export Date: 18 April 2024 Correspondence Address: Kürti, J.; Department of Biological Physics, Hungary; email: jeno.kurti@ttk.elte.hu AB - Carbon nanotubes filled with organic molecules can serve as chemical nanoreactors. Recent experimental results show that, by introducing cyclic hydrocarbon molecules inside carbon nanotubes, they can be transformed into nanoribbons or inner tubes, depending on the experimental conditions. In this paper, we present our results obtained as a continuation of our previous molecular dynamics simulation work. In our previous work, the initial geometry consisted of independent carbon atoms. Now, as an initial condition, we have placed different molecules inside a carbon nanotube (18,0): C5H5 (fragment of ferrocene), C5, C5+H2; C6H6 (benzene), C6, C6+H2; C20H12 (perylene); and C24H12 (coronene). The simulations were performed using the REBO-II potential of the LAMMPS software package, supplemented with a Lennard-Jones potential between the nanotube wall atoms and the inner atoms. The simulation proved difficult due to the slow dynamics of the H abstraction. However, with a slight modification of the parameterization, it was possible to model the formation of carbon nanoribbons inside the carbon nanotube. LA - English DB - MTMT ER - TY - JOUR AU - Darwish, Mahmoud Ibrahim Azmi AU - Zhabura, Yana AU - Pohl, László TI - Recent Advances of VO2 in Sensors and Actuators JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 14 PY - 2024 IS - 7 PG - 22 SN - 2079-4991 DO - 10.3390/nano14070582 UR - https://m2.mtmt.hu/api/publication/34761133 ID - 34761133 N1 - Department of Electron Devices, Faculty of Electrical Engineering and Informatics, Budapest University of Technology and Economics, Budapest, 1111, Hungary Department of Electrical Engineering and Automation, School of Electrical Engineering, Aalto University, Espoo, 02150, Finland Export Date: 22 April 2024 Correspondence Address: Darwish, M.; Department of Electron Devices, Hungary; email: darwishm@edu.bme.hu Correspondence Address: Pohl, L.; Department of Electron Devices, Hungary; email: pohl.laszlo@vik.bme.hu AB - Vanadium dioxide (VO2) stands out for its versatility in numerous applications, thanks to its unique reversible insulator-to-metal phase transition. This transition can be initiated by various stimuli, leading to significant alterations in the material’s characteristics, including its resistivity and optical properties. As the interest in the material is growing year by year, the purpose of this review is to explore the trends and current state of progress on some of the applications proposed for VO2 in the field of sensors and actuators using literature review methods. Some key applications identified are resistive sensors such as strain, temperature, light, gas concentration, and thermal fluid flow sensors for microfluidics and mechanical microactuators. Several critical challenges have been recognized in the field, including the expanded investigation of VO2-based applications across multiple domains, exploring various methods to enhance device performance such as modifying the phase transition temperature, advancing the fabrication techniques for VO2 structures, and developing innovative modelling approaches. Current research in the field shows a variety of different sensors, actuators, and material combinations, leading to different sensor and actuator performance input ranges and output sensitivities. LA - English DB - MTMT ER - TY - JOUR AU - Shi, J. AU - Wang, J. AU - Wang, W. AU - Wu, X. AU - Wang, H. AU - Li, J. TI - Efficient and Selective Removal of Palladium from Simulated High-Level Liquid Waste Using a Silica-Based Adsorbent NTAamide(C8)/SiO2-P JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 14 PY - 2024 IS - 6 SN - 2079-4991 DO - 10.3390/nano14060544 UR - https://m2.mtmt.hu/api/publication/34786553 ID - 34786553 AB - In order to realize the effective separation of palladium from high-level liquid waste (HLLW), a ligand-supported adsorbent (NTAamide(C8)/SiO2-P) was prepared by the impregnation method in a vacuum. The SiO2-P carrier was synthesized by in situ polymerization of divinylbenzene and styrene monomers on a macroporous silica skeleton. The NTAamide(C8)/SiO2-P adsorbent was fabricated by impregnating an NTAamide(C8) ligand into the pore of a SiO2-P carrier under a vacuum condition. The adsorption performance of NTAamide(C8)/SiO2-P in nitric acid medium has been systematically studied. In a solution of 0.2 M HNO3, the distribution coefficient of Pd on NTAamide(C8)/SiO2-P was 1848 mL/g with an adsorption percentage of 90.24%. With the concentration of nitric acid increasing, the adsorption capacity of NTAamide(C8)/SiO2-P decreases. Compared to the other 10 potential interfering ions in fission products, NTAamide(C8)/SiO2-P exhibited excellent adsorption selectivity for Pd(II). The separation factor (SFPd/other metals > 77.8) is significantly higher than that of similar materials. The interference of NaNO3 had a negligible effect on the adsorption performance of NTAamide(C8)/SiO2-P, which maintained above 90%. The adsorption kinetics of Pd(II) adsorption on NTAamide(C8)/SiO2-P fits well with the pseudo-second order model. The Sips model is more suitable than the Langmuir and Freundlich model for describing the adsorption behavior. Thermodynamic analysis showed that the adsorption of Pd(II) on NTAamide(C8)/SiO2-P was a spontaneous, endothermic, and rapid process. NTAamide(C8)/SiO2-P also demonstrated good reusability and economic feasibility. © 2024 by the authors. LA - English DB - MTMT ER - TY - JOUR AU - Mukai, N. AU - Leonov, A.O. TI - “Polymerization” of Bimerons in Quasi-Two-Dimensional Chiral Magnets with Easy-Plane Anisotropy JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 14 PY - 2024 IS - 6 SN - 2079-4991 DO - 10.3390/nano14060504 UR - https://m2.mtmt.hu/api/publication/34768723 ID - 34768723 LA - English DB - MTMT ER - TY - JOUR AU - Romano, Eugenia AU - Palladino, Roberta AU - Cannavale, Mariagabriella AU - Lamparelli, Erwin Pavel AU - Maglione, Barbara TI - Enhanced Stability of Oral Vitamin C Delivery: A Novel Large-Scale Method for Liposomes Production and Encapsulation through Dynamic High-Pressure Microfluidization JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 14 PY - 2024 IS - 6 SP - 516 SN - 2079-4991 DO - 10.3390/nano14060516 UR - https://m2.mtmt.hu/api/publication/34761436 ID - 34761436 AB - In recent years, nanocarriers have been widely used as an effective solution for oral administration of pharmaceuticals. However, there is still an urgent need to speed up their translation to clinical practice. Cost-effective and industrially scalable methodologies are still needed. Herein, the production of vitamin C-loaded liposomes for nutraceutical purposes has been investigated and optimized by adopting a High-Pressure Homogenizer. Initially, the impact of process parameters on particles size, distributions, and morphology was explored. The findings document that the pressure and cycle manipulation allow for control over liposome size and polydispersity, reaching a maximum encapsulation efficiency exceeding 80%. This significantly improves the storage stability of vitamin C, as demonstrated by monitoring its antioxidant activity. Furthermore, the in vitro simulation of gastrointestinal digestion shows that liposomes could protect the active substance from damage and control its release in the gastrointestinal fluid. Thus, the whole nanodelivery system can contribute to enhancing vitamin C bioavailability. In conclusion, the results indicate that this innovative approach to producing vitamin C liposomes holds promise for clinical translation and industrial scale-up. Indeed, by utilizing food-grade materials and straightforward equipment, it is possible to produce stable and functional liposomes suitable for health products. LA - English DB - MTMT ER - TY - JOUR AU - Lei, Da-Peng AU - Huang, Jian-Hua TI - Automated Monitoring System for Suspended Photocatalytic Batch Reactions Based on Online Circulatory Spectrophotometry JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 14 PY - 2024 IS - 6 SP - 508 SN - 2079-4991 DO - 10.3390/nano14060508 UR - https://m2.mtmt.hu/api/publication/34737048 ID - 34737048 AB - Employing an automated monitoring system (AMS) for data acquisition offers benefits, such as reducing the workload, in the kinetic study of suspended photocatalytic batch reactions. However, the current methods in this field tend to narrowly focus on the substrate and often overlook the optical characteristics of both the mixture and solid particles. To address this limitation, in this study, we propose a novel AMS based on online circulatory spectrophotometry (OCS) and incorporate debubbling, aeration, and segmented flow (DAS), named DAS-OCS-AMS. Initially, a debubbler is introduced to mitigate the issue of signal noise caused by bubbles (SNB). Subsequently, an aerated and segmented device is developed to address the issue of particle deposition on the inner wall of the pipeline (PDP) and on the windows of the flow cell (PDW). The proposed DAS-OCS-AMS is applied to monitor the kinetics of the photocatalytic degradation of Acid Orange Ⅱ by TiO2 (P25), and its results are compared with those obtained using the traditional OCS-AMS. The comparative analysis indicates that the proposed DAS-OCS-AMS effectively mitigates the influence of SNB, PDP, and PDW, yielding precise results both for the mixture and solid particles. The DAS-OCS-AMS provides a highly flexible universal framework for online circulatory automated monitoring and a robust hardware foundation for subsequent data processing research. LA - English DB - MTMT ER - TY - JOUR AU - Zhang, H. AU - Huang, W. AU - Komarneni, S. TI - Polymer-Clay Nanocomposites for the Uptake of Hazardous Anions JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 14 PY - 2024 IS - 5 SN - 2079-4991 DO - 10.3390/nano14050467 UR - https://m2.mtmt.hu/api/publication/34795266 ID - 34795266 N1 - Department of Ecosystem Science and Management and Materials Research Institute, 204 Energy and the Environment Laboratory, The Pennsylvania State University, University ParkPA 16802, United States Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Changzhou University, Changzhou, 213164, China Export Date: 17 April 2024 Correspondence Address: Komarneni, S.; Department of Ecosystem Science and Management and Materials Research Institute, University Park, United States; email: komarneni@psu.edu LA - English DB - MTMT ER -