Article
Chemistry, Inorganic & Nuclear
Yun-Wu Li, Shi-Kun Su, Cai-Zhen Yue, Jun Shu, Peng-Fang Zhang, Fang-Hui Du, Su-Na Wang, Hui-Yan Ma, Jie Yin, Xin Shao
Summary: The study designed a hierarchical Fe3O4@MnOx nano-composite with improved electrocatalytic performance and overall water splitting efficiency by introducing a pH-regulated redox reaction.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Daniel del-Pozo-Bueno, Maria Varela, Marta Estrader, Alberto Lopez-Ortega, Alejandro G. Roca, Josep Nogues, Francesca Peiro, Sonia Estrade
Summary: The study investigates the local magnetization of antiferromagnetic/ferrimagnetic FeO/Fe3O4 core/shell nanocubes using electron magnetic circular dichroism (EMCD), revealing a concentric structure with four different magnetic zones. The EELS compositional analysis shows an oxidation gradient at the interface between the FeO core and Fe3O4 shell. The magnetic moment is largest at the surface and decreases toward the core, indicating a correlation between the inner magnetic structure and the microstructure of the nanoparticles.
Article
Chemistry, Multidisciplinary
Maria Antonieta Ramirez-Morales, Anastasia E. Goldt, Polina M. Kalachikova, Javier A. B. Ramirez, Masashi Suzuki, Alexey N. Zhigach, Asma Ben Salah, Liliya Shurygina, Sergey D. Shandakov, Timofei Zatsepin, Dmitry Krasnikov, Toru Maekawa, Evgeny N. Nikolaev, Albert G. Nasibulin
Summary: Carbon-encapsulated iron nanoparticles with a mean diameter of 15 nm were synthesized using a gas-phase reaction at high temperatures. The nanoparticles were stabilized with a coating and showed high specific absorption rate (SAR), making them suitable for magnetic hyperthermia therapy.
Article
Materials Science, Ceramics
Hur Abbas, K. Nadeem, S. Munir, U. Ahmed, M. Usman, Mikhail Kostylev
Summary: The study investigated the single and co-doping effects of Fe and Co on the structural and magnetic properties of NiO nanoparticles. It was found that Fe and Co doping induced different magnetic behaviors in the NiO system, with core magnetization being a main effect of Co-Fe co-doping.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Giovanni Marco Saladino, Ronak Kakadiya, Shaquib Rahman Ansari, Alexandra Teleki, Muhammet Sadaka Toprak
Summary: Superparamagnetic iron oxide nanoparticles (SPIONs) play a dominant role in various biomedical applications, including magnetic separation, drug delivery, diagnostics, and hyperthermia treatments. In this study, superparamagnetic nanoclusters (SP-NCs) with high unit magnetization and diameters up to 400 nm were synthesized using conventional or microwave-assisted solvothermal methods. The choice of synthesis route and capping agent significantly influenced the particle size, SP-NC size, surface chemistry, and magnetic properties. The SP-NCs were then coated with a silica shell doped with a fluorophore to provide fluorescence properties and high stability. The heating efficiency studies demonstrated the potential of these synthesized SP-NCs in hyperthermia treatment. The enhanced magnetically-active content, fluorescence, magnetic property, and heating efficiency of SP-NCs offer promising opportunities for biomedical applications.
NANOSCALE ADVANCES
(2023)
Article
Materials Science, Multidisciplinary
Saeki Yamamuro, Toshiro Tanaka
Summary: A new method is presented for fabricating ferrite-based bi-magnetic nanoparticles with non-core/shell morphology through a lamella-based phase separation process induced by the eutectoid reaction. The fabrication process is based on the decomposition of chemically synthesized FeO nanoparticles into a nanoscale mixture of a ferromagnetic metal and a ferrimagnetic spinel ferrite. Room-temperature magnetization measurements suggest that the two magnetic phases could be magnetically exchange-coupled, offering potential for tuning the magnetic properties of spinel ferrites through the substitution of constituent metal ions.
Article
Chemistry, Physical
Ji Ho Kang, Yong Jun Park, Ji Ho Hong, Jun Woo Choi, Dong Hun Kim
Summary: This study proposes a method for modulating the microstructure, composition, and magnetic properties of metal-metal oxide thin films fabricated by co-sputtering. The method has the potential to be used in multifunctional electronics. Detailed microstructural and compositional analysis reveals the presence of self-assembled core-shell structured nanocomposites.
APPLIED SURFACE SCIENCE
(2022)
Article
Acoustics
Ah-Hyeon Park, Wenjuan Shi, Jong-Un Jung, Young-Uk Kwon
Summary: TM@Pt NPs, highly active and durable ORR electrocatalysts, are typically synthesized using multistep methods. This study successfully developed a single-step ultrasound-assisted polyol synthesis (UPS) method for Fe@Pt NPs, determining optimal conditions for high purity and yield.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Bin Yue, Kang Yang, Huaming Xie, Ying Lei, Jianying Li, Yujun Si
Summary: An effective core-shell structured Fe-N-C@NC catalyst composed of ultra-thin porous conductive carbon shells and carbon-supported FeNx active cores was prepared. The Fe-N-C@NC catalyst exhibited higher half-wave potential and increased durability compared to Pt/C. In practical application, Fe-N-C@NC-assembled Zn-air battery achieved higher peak power density and showed no apparent decay after 150 hours of testing.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Wenbo Pi, Xi Chen, Qiuyun Fu, Zixiao Lu, Honglang Li, Zaiqi Tang, Wei Luo
Summary: Current semiconductor gas sensors often fail to operate in low-temperature and high-vacuum environments, making it challenging to detect gases in space. Herein, a core-shell structured SnO2@Ag2O composite with a high proportion of an effective interface was designed and developed into a MEMS gas sensor. The gas sensor achieved a fast response and high selectivity to H2S gas under extreme conditions, which could potentially be utilized in gas detection for deep space exploration.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Michele Ghini, Nicola Curreli, Matteo B. Lodi, Nicolo Petrini, Mengjiao Wang, Mirko Prato, Alessandro Fanti, Liberato Manna, Ilka Kriegel
Summary: This study demonstrates the depletion layer engineering and control in ITO/In2O3 nanocrystals through tuning the shell thickness or photodoping, enabling the design and prediction of their optoelectronic properties and enhancing charge storage capability.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Yue Yang, Chen Qian, Puqi Hu, Wentong Yang, Zimo He, Yubing Dong, Yaqin Fu, Yaofeng Zhu
Summary: In this study, Fe/Fe3C@C nanocomposites with a core-shell structure were prepared by solvothermal synthesis and high-temperature carbonization process. The resulting nanocomposites exhibit efficient electromagnetic wave absorption (EMA) performance. This work may provide new insights into the preparation of broadband EMA materials.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Analytical
Dazhi Tian, Wen Xiang, Hao Wang, Wentao Jiang, Ting Li, Minghui Yang
Summary: B-doped core-shell Fe@BC nanozyme was synthesized and utilized for detecting the activity of alanine aminotransferase (ALT) through its peroxidase-like activity. The ALT activity can be determined by measuring the amount of generated H2O2. The detection limit of the assay is 4 U/L, with a linear range from 10 to 1000 U/L.
Article
Materials Science, Multidisciplinary
Aqeel Al-Hamaidah, Mahmood Rezaee Roknabadi, Malek Bagheri Harouni, Bizhan Malaekeh-Nikouei, Asma Mahmoudi, Reza Ghanbari, Alireza Charmforoushan
Summary: We report the synthesis of a mesoporous calcium silicate superparamagnetic nanoparticle with a core-shell structure of ZnMnFe2O4@Fe-CaSiO3. The core-shell nanocomposite exhibits excellent properties including meso-porous structure, superparamagnetism at room temperature, low toxicity, large surface area, tunable pore size, and easy surface manipulation. The addition of different percentages of Fe ions onto the calcium silicate structure further enhances the magnetic properties of the core-shell structure. These mesoporous superparamagnetic nanocomposites have potential applications in drug delivery, magnetic resonance imaging, magnetic hyperthermia, and bone tissue regeneration.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Shuang Liu, Shaobo Han, Yong Li, Wenjie Shen
Summary: Pd25Cu75@SiO2 core-shell and PdCu@SiO2@Cu core-shell-satellite architectures were fabricated using a reverse microemulsion method. The core-shell-satellite catalyst showed substantially enhanced activity and stability due to the synergetic catalysis between the metal core and the surrounding Cu clusters.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Arnon Fluksman, Aritz Lafuent, Zhi Li, Jordi Sort, Silvia Lope-Piedrafita, Maria Jose Esplandiu, Josep Nogues, Alejandro G. Roca, Ofra Benn, Borja Sepulveda
Summary: In this study, metal iron based magnetoplasmonic drug-loaded nanocapsules (MAPSULES) were developed to enhance the efficacy of cancer nanotherapies locally. The MAPSULES combine powerful external magnetic concentration in the tumor and efficient photothermal actuation to boost the drug therapeutic action at ultralow drug concentrations. The results show that this approach has the potential to significantly amplify the therapeutic effects of drugs for different diseases.
Review
Chemistry, Multidisciplinary
Ferran Pujol-Vila, Pau Guell-Grau, Josep Nogues, Mar Alvarez, Borja Sepulveda
Summary: Soft optomechanical systems have the ability to respond reversibly to external stimuli by changing their properties. They combine the optical properties of nanomaterials with the deformability of soft polymers, enabling the development of mechanically tunable optical systems, sensors, and actuators. This review summarizes the recent progress in soft optomechanical systems for mechanical sensing, optical modulation, and light-induced mechanical actuators, and analyzes the limitations and future prospects of these systems.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
L. Bernadet, J. Segura-Ruiz, L. Yedra, S. Estrade, F. Peiro, D. Montinaro, M. Torrell, A. Morata, A. Tarancon
Summary: This article investigates the electrolyte-cathode interfaces in solid oxide fuel cells and presents advanced post-mortem characterization of different cell types. It is found that the barrier layer deposited by pulsed laser deposition (PLD) remains stable, prevents the formation of insulating phases, and avoids fracture, in contrast to the screen-printed barrier layers.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Lucia Garcia, Eneko Garaio, Alberto Lopez-Ortega, Itziar Galarreta-Rodriguez, Laura Cervera-Gabalda, Guillermo Cruz-Quesada, Alfonso Cornejo, Julian J. Garrido, Cristina Gomez-Polo, Jose Ignacio Perez-Landazabal
Summary: Hybrid magnetic nanoparticles consisting of an iron oxide core and a mesoporous SiO2 shell were synthesized. The nanoparticles exhibited high magnetization, large surface area, and efficient drug delivery. The controlled drug release efficiency and heating response of the nanoparticles were achieved using an external AC magnetic field.
Article
Physics, Applied
Pauline Dufour, Thomas Maroutian, Maxime Vallet, Kinnary Patel, Andre Chanthbouala, Charlotte Jacquemont, Lluis Yedra, Vincent Humbert, Florian Godel, Bin Xu, Sergey Prosandeev, Laurent Bellaiche, Mojca Otonicar, Stephane Fusil, Brahim Dkhil, Vincent Garcia
Summary: The antiferroelectric state of 45-nm-thick epitaxial thin films of PbZrO3 is observed through the characteristic structural periodicity of dipoles and the double hysteresis of the polarization-electric field response. A transition to a ferroelectric-like state is found to occur in a large temperature window. Atomistic simulations confirm the presence and origin of the ferroelectric state in the films. Electric-field-induced ferroelectric transitions are detected via piezoresponse force microscopy.
APPLIED PHYSICS REVIEWS
(2023)
Editorial Material
Chemistry, Multidisciplinary
Alberto Lopez-Ortega
Article
Nanoscience & Nanotechnology
Itziar Galarreta-Rodriguez, Alberto Lopez-Ortega, Eneko Garayo, Juan Jesus Beato-Lopez, Paulo La Roca, Vicente Sanchez-Alarcos, Vicente Recarte, Cristina Gomez-Polo, Jose Ignacio Perez-Landazabal
Summary: Additive manufacturing technology has gained attention for its versatility in design and easy manufacture of structural and functional elements using composite materials. This study focuses on the development of low-cost magnetically active polymeric composites by embedding magnetic nanoparticles in a polymeric blend. The composites were prepared using the solution casting method and extruded into continuous and flexible filaments for 3D printing. The filaments exhibited magnetic properties and the ability to generate heat under low-frequency alternating magnetic fields, making them suitable for various applications such as magnetic hyperthermia and drug release.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Arnon Fluksman, Aritz Lafuente, Ron Braunstein, Eliana Steinberg, Nethanel Friedman, Zhanna Yekhin, Alejandro G. Roca, Josep Nogues, Ronen Hazan, Borja Sepulveda, Ofra Benny
Summary: Multifunctional drug-loaded polymer-metal nanocapsules have gained increasing attention in drug delivery due to their ability to respond to physicochemical stimuli. This study demonstrates a versatile fabrication strategy to incorporate different functional metals with tailored magnetic, optical, or chemical properties on solid drug-loaded polymer nanoparticles. The results show enhanced drug effects and improved control over biomedical applications using these hybrid nanocapsules.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Alejandra Ruiz-Clavijo, Nicolas Perez, Olga Caballero-Calero, Javier Blanco, Francesca Peiro, Sergi Plana-Ruiz, Miguel Lopez-Haro, Kornelius Nielsch, Marisol Martin-Gonzalez
Summary: The resistance of an ordered 3D-Bi2Te3 nanowire nanonetwork was studied, and it was found that the increase in resistance at low temperatures can be explained by the Anderson model for localization. Angle-dependent magnetoresistance measurements revealed a distinctive weak antilocalization characteristic with a double feature associated with transport along two perpendicular directions dictated by the spatial arrangement of the nanowires. The observed localization effects may explain the enhancement of the Seebeck coefficient in the 3D-Bi2Te3 nanowire nanonetwork compared to individual nanowires.
Article
Chemistry, Physical
I. V. Golosovsky, I. A. Kibalin, A. Gukasov, A. G. Roca, A. Lopez-Ortega, M. Estrader, M. Vasilakaki, K. N. Trohidou, T. C. Hansen, I. Puente-Orench, E. Lelievre-Berna, J. Nogues
Summary: This comprehensive study presents the use of polarized neutron powder diffraction to investigate Fe3O4/Mn3O4 core/shell nanoparticles. The results reveal that at low fields, the Fe3O4 and Mn3O4 magnetic moments are antiferromagnetically coupled, while at high fields, they become parallel. The reorientation of the Mn3O4 shell moments is associated with a gradual transition of local magnetic susceptibility from anisotropic to isotropic under the applied field. Additionally, the magnetic coherence length of the Fe3O4 cores shows unusual field dependence due to the competition between antiferromagnetic interface interaction and Zeeman energies. This study demonstrates the potential of polarized neutron powder diffraction for complex multiphase magnetic materials.
Review
Physics, Multidisciplinary
A. G. Roca, J. F. Lopez-Barbera, A. Lafuente, F. Ozel, E. Fantechi, J. Muro-Cruces, M. Hemadi, B. Sepulveda, J. Nogues
Summary: Nanotherapies, particularly photothermal therapy using iron oxide nanoparticles, have gained increasing interest in cancer treatment due to their high efficacy and reduced side effects. The photothermal performance of iron oxide nanoparticles varies depending on the light wavelength and physiochemical properties. Fe3O4 nanoparticles tend to perform better than gamma-Fe2O3 counterparts, especially in the second biological window. FeO, which has not been explored in photothermal therapy, shows promising absorption properties. Furthermore, the enhanced properties of iron oxide nanoparticles in the second spectral window have potential applications beyond cancer treatment.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2023)
Review
Chemistry, Multidisciplinary
Aurore Van de Walle, Albert Figuerola, Ana Espinosa, Ali Abou-Hassan, Marta Estrader, Claire Wilhelm
Summary: Due to their unique physicochemical features, nanoparticles, especially magnetic nanoparticles with iron-based composition, have become effective multifunctional tools for biomedical applications. In oncology, these nanoparticles have been widely used in magnetic resonance imaging, magnetic hyperthermia, photothermal therapy, and ferroptosis induction.
MATERIALS HORIZONS
(2023)
Review
Chemistry, Multidisciplinary
Aurore Van de Walle, Albert Figuerola, Ana Espinosa, Ali Abou-Hassan, Marta Estrader, Claire Wilhelm
Summary: With their unique physicochemical features, nanoparticles, especially magnetic nanoparticles with iron-based composition, have been recognized as effective multifunctional tools for biomedical applications. This review focuses on the recent applications of iron-based nanomaterials in oncology, specifically photothermal therapy (PTT) and ferroptosis. These emerging physical and chemical methods for cancer therapy, facilitated by magnetic nanoparticles, offer versatile opportunities, combining multiple functionalities.
MATERIALS HORIZONS
(2023)
Article
Microscopy
Shengli Zhang, Ying Wang, Bowei Wang, Yi Zeng, Jiani Li, Xingyue Wang, Cuihua Hu, Zhankun Weng, Zuobin Wang
Summary: Curcumin was found to have effects on the activity, migration, and mitochondrial membrane potential of malignant hepatocytes and their mitochondria. The findings from both optical microscopy and atomic force microscopy studies confirm these effects on cell morphology and biomechanics.
Article
Microscopy
Rutika Sansaria, Krishanu Dey Das, Alwin Poulose
Summary: This paper presents a method for quantifying Golgi dispersion images and classifying them using machine learning models. By applying automated image processing and segmentation, extracting features, and using different classifiers, accurate classification of Golgi images is achieved.
Article
Microscopy
Marjorie da Silva, Cintia Eleonora Lopes Justino, Fernando Henrique Carnimeo, Fernando Barbosa Noll, Johan Billen
Summary: This article describes the secretory glands in females of two species of Myzinum and discusses their homology with other glands in the Hymenoptera order. The study finds that the three glands, instead of the commonly believed two, are present in Myzinum species. However, the limited research on the structure, function, and evolution of female accessory glands in Hymenoptera prevents conclusive statements.
Article
Microscopy
Ping Hao, Wen Yin, Xi Chen, Shuangshuang Qin, Yue Yu, Yuan Yuan, Xiaoyu Quan, Bing Hu, Shouhai Chen, Yi Wu
Summary: This study confirmed the secretion of nano-scale exosomes-multivesicular bodies and the interaction of high endothelial cells (HECs) with lysosomes and mitochondria in the small intestine of laying birds. Immunohistochemistry and immunofluorescence results showed the strong immunoreactivity of exosome-related proteins and autophagic-related proteins in the lamina propria of the small intestine. These findings reveal an innovative communication method among HECs in the small intestine.
Article
Microscopy
Stefan Talu, Robert S. Matos, Henrique Duarte da Fonseca Filho, Daniela Predoi, Simona Liliana Iconaru, Carmen Steluta Ciobanu, Liliana Ghegoiu
Summary: This study developed composite layers based on magnesium-doped hydroxyapatite and chitosan, and demonstrated their good biocompatibility and antifungal effects against osteosarcoma cells. The attachment and growth of the cells on the composite layers were promoted, while the growth of Candida albicans was inhibited. The morphological analysis revealed complex 3D patterns on the cancer cell surfaces on the magnesium-containing composite layers.
