Article
Chemistry, Multidisciplinary
Nauman Yousaf, Muhammad Ishfaq, Hassan Ali Qureshi, Atif Saleem, Haofeng Yang, Muhammad Fahad Sardar, Chunqin Zou
Summary: This study investigated the effects of different sources of iron oxide nanoparticles (NPs) applied to roots and leaves on the growth and physiological responses of maize seedlings. The results showed that different sources of iron oxide NPs and root application had varying effects on maize. Root application of iron oxide NPs significantly increased the biomass of maize, while foliar application had a smaller effect. Both foliar and root applications increased the chlorophyll content, but foliar application had a more pronounced effect. Reactive oxygen species showed no significant response to the application of iron oxide NPs on maize.
Article
Engineering, Electrical & Electronic
Zaheer H. Shah, Attia Awan, Saira Riaz, S. Sajjad Hussain, Riffat Sagheer, Zohra N. Kayani, Shahzad Naseem
Summary: This study investigates the structural, magnetic, and field emission behavior of iron oxide for various biomedical and field emission applications. The formation of different phases and magnetic properties of iron oxide nanoneedles are studied by varying the sols' molarity. The results show potential applications of the nanoneedles in cell probing and field emission.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Tao Wang, Zhiwei Fan, Wuhong Xue, Huali Yang, Run-Wei Li, Xiaohong Xu
Summary: This study investigates the rate-dependent phase transition behavior of ordered-LiNi0.5Mn1.5O4 (o-LNMO) using in operando time-resolved X-ray diffraction. The results show that there is a narrow region of solid solution for both charge and discharge at both slow and fast rates. The phase transition behavior is highly asymmetric at fast rates.
Article
Environmental Sciences
Huseyin Tombuloglu, Norah Albenayyan, Yassine Slimani, Sultan Akhtar, Guzin Tombuloglu, Munirah Almessiere, Abdulhadi Baykal, Ismail Ercan, Hussein Sabit, Ayyar Manikandan
Summary: This study compared the efficacy and fate of different iron oxide nanoparticles on barley growth, revealing that gamma-Fe2O3 and Fe3O4 nanoparticles significantly improved germination rate, plant biomass, and pigmentation. While they have great potential as nanofertilizers in breeding programs, caution should be taken due to their potential unknown effects on other organisms.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Nanoscience & Nanotechnology
Gopal Niraula, Jose A. H. Coaquira, Giorgio Zoppellaro, Bianca M. G. Villar, Flavio Garcia, Andris F. Bakuzis, Joao P. F. Longo, Mosar C. Rodrigues, Diego Muraca, Ahmad Ayesh, Francisco Savio M. Sinfronio, Alan S. de Menezes, Gerardo F. Goya, Surender K. Sharma
Summary: Microwave-assisted synthesis in water was used to prepare alpha-Fe2O3 nanomaterials, which were transformed into iron oxide Fe3O4-gamma-Fe2O3 hollow nanoparticles with well-defined sizes and shapes (nanorings and nanotubes). The hollow nanoparticles exhibited promising magnetic responses for potential biomedical applications, with nanotubes showing the highest specific absorption rate and intrinsic loss power reported in the hollow iron-oxide family. The importance of magnetic shape anisotropy in nanotubes was well-predicted by the modified dynamic hysteresis theoretical model.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Asifur Rahman, Seju Kang, Sean McGinnis, Peter J. Vikesland
Summary: This study compared the environmental impacts of FeOx-NPs produced through seven common synthesis routes using a cradle-to-gate life cycle assessment. The results showed that physical and biological synthesis routes had higher environmental impacts, while chemical synthesis routes had lower impacts, except for the thermal decomposition method.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Editorial Material
Nanoscience & Nanotechnology
Pranaba K. Nayak
Summary: The analysis of the Mossbauer spectroscopy in the recent paper is flawed, as the authors did not properly analyze the room temperature spectra of the samples. Corrections are necessary for Figure 4, Tables S3 and S4, and the main text.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Johannes Dietrich, Alexius Enke, Nils Wilharm, Robert Konieczny, Andriy Lotnyk, Andre Anders, Stefan G. G. Mayr
Summary: Iron oxide nanoparticles with a mean size of approximately 5 nm were synthesized using energetic electrons to irradiate micro-emulsions containing iron salts. The properties of the nanoparticles were investigated using various techniques, revealing that the formation of superparamagnetic nanoparticles starts at a dose of 50 kGy. The particles tend to form clusters and show increasing crystallinity and yield with increasing doses.
Article
Chemistry, Multidisciplinary
Clementine Bidaud, David Garcia-Soriano, Elena. H. H. Sanchez, Jean-Marc Greneche, Jose A. De Toro, Maria Varela, Monica Dhanjani, Alberto Bollero, Gorka Salas
Summary: This study presents a method to synthesize raspberry-like gamma-Fe2O3@CoO core-shell nanoparticles with adjustable morphology and magnetic properties. The presence and amount of CoO satellites, which affect the magnetic functionality of the nanoparticles, can be controlled by adjusting the concentration of oleic acid during synthesis. Various characterization techniques have been employed to establish the correlation between chemical, structural, morphological, and magnetic properties. The simplified synthesis approach has the potential to produce novel hybrid nanostructures with desired functional properties.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Environmental Sciences
Raman Novikau, Galina Lujaniene, Vidas Pakstas, Martynas Talaikis, Kestutis Mazeika, Audrius Drabavicius, Arnas Naujokaitis, Sergej Semcuk
Summary: The muscovite mica clay-graphene oxide-maghemite-magnetite (gamma-Fe2O3-Fe3O4) composite was used for the adsorption of caesium(I) and cobalt(II). The composite showed a layered structure with irregularly shaped pores on the surface. Adsorption of ions was influenced by initial concentration, pH (except for caesium), mass of adsorbent, temperature, and contact time. The high adsorption capacity of the composite could be attributed to its functional groups, active sites, or multilayer adsorption. The adsorption mechanism involved electrostatic interactions and ion exchange.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Editorial Material
Nanoscience & Nanotechnology
Fernande Grandjean, Gary J. Long
Summary: This paper describes the morphological, compositional, and magnetic properties of three different magnetite/maghemite or Fe3O4/gamma-Fe2O3 hollow nanoparticles. The nanoparticles have larger sizes than typical nanoparticles and are found to be close in composition to gamma-Fe2O3.
ACS APPLIED NANO MATERIALS
(2022)
Article
Electrochemistry
Tatyana Molodtsova, Mikhail Gorshenkov, Alexey Saliev, Vladislav Vanyushin, Igor Goncharov, Nina Smirnova
Summary: The study successfully synthesized gamma-Fe2O3/Fe3O4 nanocomposite using an electrochemical method for electrocatalytic reduction and sensing of hydrogen peroxide. The nanocomposite exhibited excellent sensing performance, including a low limit of detection, wide linear range, and fast response time. This indicates that gamma-Fe2O3/Fe3O4 prepared by an electrochemical method is a promising material for electrochemical sensing of H2O2.
ELECTROCHIMICA ACTA
(2021)
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)
Article
Environmental Sciences
A. G. Ramu, Sunitha Salla, S. Gopi, P. Silambarasan, D. J. Yang, M. J. Song, Hayssam M. Ali, Mohamed Z. M. Salem, Dongjin Choi
Summary: In this study, a γ-Fe2O3-N-rGO nanohydrogel was synthesized and showed excellent performance in catalytic reduction and electrochemical detection of environmental pollutant 4-NP.
Article
Chemistry, Inorganic & Nuclear
Xiaoben Zhang, Chuanchuan Jin, Shaobo Han, Peiyao Guo, Yan Zhou, Wei Liu, Wenjie Shen
Summary: The atomic structure of the Fe3O4/α-Fe2O3 interface during the phase transition from hematite to magnetite was studied. Experimental observation and HRTEM simulation identified a unique polyhedral model, where Fe3O4(111) epitaxially grows along α-Fe2O3(0001) with an aligned orientation of [112]Fe3O4 ||[112 0]α-Fe2O3. Understanding the atomic rearrangement and dynamic behavior of phase transition is important for the functionalities of iron oxides in various applications.
INORGANIC CHEMISTRY
(2023)
Article
Geochemistry & Geophysics
Lei Jin, Dimitrios Koulialias, Michael Schnedler, Andreas U. Gehring, Mihaly Posfai, Philipp Ebert, Michalis Charilaou, Robin E. Schaublin, Chun-Lin Jia, Jorg F. Loffler, Rafal E. Dunin-Borkowski
Summary: Pyrrhotite minerals, derived from the NiAs-type FeS aristotype, contain ordered Fe vacancies and can act as efficient electrocatalysts. Despite extensive studies, the local structural details of pyrrhotite superstructures formed by different arrangements of Fe vacancies are still unclear. Experimental observations and computer simulations have shown the presence of commensurate and incommensurate constituents in pyrrhotite samples, leading to insights into the local magnetic properties of each phase.
AMERICAN MINERALOGIST
(2021)
Article
Geochemistry & Geophysics
Zsombor Molnar, Peter Pekker, Istvan Dodony, Mihaly Posfai
Summary: The presence of smectite clay minerals plays important and complex roles in the formation of Mg-bearing calcium carbonate phases, affecting nucleation, phase transitions, and structures. Smectite enhances calcite formation and triggers vaterite or aragonite precipitation, showing significant influence on the evolution of carbonate minerals.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Lucas Kuhrts, Sylvain Prevost, Daniel M. Chevrier, Peter Pekker, Oliver Spaeker, Mathias Egglseder, Jens Baumgartner, Mihaly Posfai, Damien Faivre
Summary: The addition of poly(arginine) in the synthetic formation of magnetite nanoparticles induces a biomineralization-reminiscent pathway, shifting the magnetite formation pathway from thermodynamic to kinetic control. By altering the energetic landscape of magnetite formation and catalyzing pH-dependent precursor attachment, the size and morphology of magnetite nanoparticles can be continuously tuned. This mechanistic shift also allows for control over crystal morphology by adjusting the interfacial interaction between liquidlike ferrihydrite and nascent magnetite nanoparticles, demonstrating the versatility of kinetically controlled nanoparticle formation pathways.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Biotechnology & Applied Microbiology
L. C. Staicu, P. J. Wojtowicz, D. Baragano, M. Posfai, Z. Molnar, E. Ruiz-Agudo, J. L. R. Gallego
Summary: This study investigates bioremediation of metal-laden, arsenic-dominated retentate using Shewanella sp. O23S, showing that addition of cysteine can increase removal rates and contribute to enhanced efficiency through the production of hydrogen sulfide. By utilizing a biological system with naturally sourced inocula and inexpensive reagents, real metal-laden industrial effluents can be treated to medium-to-high efficiency.
LETTERS IN APPLIED MICROBIOLOGY
(2022)
Article
Geochemistry & Geophysics
Stefan Farsang, Peter Pekker, Giulio Lampronti, Zsombor Molnar, Rastislav Milovsky, Mihaly Posfai, Daniel Ozdin, Timothy D. Raub, Simon A. T. Redfern
Summary: In this study, micro- and nano-inclusions embedded in calcite phantom crystals from Gemerska Ves, Slovak Republic, were characterized using various techniques. The results suggest that these inclusions originated from the surrounding soil and limestone outcropping, and they have a significant impact on crystal growth and precipitation.
AMERICAN MINERALOGIST
(2022)
Article
Environmental Sciences
Lucian C. Staicu, Paulina J. Wojtowicz, Zsombor Molnar, Encarnacion Ruiz-Agudo, Jose Luis R Gallego, Diego Baragano, Mihaly Posfai
Summary: This study investigates the anaerobic metabolism and biomineralization of arsenic and selenium in Shewanella sp. O23S, highlighting the extracellular formation of As-S and Se(-S)(0) biominerals.
ENVIRONMENTAL POLLUTION
(2022)
Article
Chemistry, Multidisciplinary
Yeseul Park, Zohar Eyal, Peter Pekker, Daniel M. Chevrier, Christopher T. Lefevre, Pascal Arnoux, Jean Armengaud, Caroline L. Monteil, Assaf Gal, Mihaly Posfai, Damien Faivre
Summary: This study reports the periplasmic biomineralization of copper sulfide nanoparticles produced by the magnetotactic bacterium Desulfamplus magnetovallimortis strain BW-1. It reveals previously unknown possibilities for intracellular biomineralization and holds promise for biological metal recovery.
Article
Environmental Sciences
Ilona Nyiro-Kosa, Faizan Ahmad, Andras Hoffer, Mihaly Posfai
Summary: Diesel and petrol powered vehicles contribute to magnetic particles in urban air, which may pose a potential health risk.
ATMOSPHERIC ENVIRONMENT-X
(2022)
Article
Geochemistry & Geophysics
Zsombor Molnar, Istvan Dodony, Mihaly Posfai
Summary: This study found that clay minerals have an important influence on the crystallization process of amorphous calcium carbonate (ACC), promoting the rapid growth and coalescence of ACC particles on their surface, resulting in larger particle sizes and the conversion into calcite. Furthermore, the presence of magnesium ions significantly increases the stability of ACC, leading to the formation of aragonite instead of calcite.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Ecology
M. Dziuba, A. Paulus, L. Schramm, R. P. Awal, M. Posfai, C. L. Monteil, S. Fouteau, R. Uebe, D. Schueler
Summary: Through research, it was found that a dormant gene cluster encoding magnetosome biosynthesis was horizontally inherited in a non-magnetotactic phototrophic bacterium. This cluster was inactivated through transcriptional silencing and antisense RNA regulation, but retained functionality. However, the trait was rapidly lost due to strong negative selection, highlighting the instability of this trait in the organism. These findings provide insight into the horizontal dissemination of gene clusters encoding complex prokaryotic organelles and their genomic preservation mechanisms in a dormant state.
Article
Geosciences, Multidisciplinary
Agnes Rostasi, Kornel Racz, Melinda A. Fodor, Boglarka Topa, Zsombor Molnar, Tamas G. Weiszburg, Mihaly Posfai
Summary: This study characterized the formation of modern carbonate sediments in Lake Balaton, Hungary, and found that mineral particles from tributaries and the atmosphere made up a small fraction of the sediment, with autochthonous carbonate being the main contributor. The study also revealed variations in magnesium content in calcite and the presence of dolomite, which had different sources in the lake. The findings provide insights into sediment formation and the retention and release of nutrients by sediment minerals.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Patrick Meister, Silvia Frisia, Istvan Dodony, Peter Pekker, Zsombor Molnar, Stephanie Neuhuber, Susanne Gier, Ivett Kovacs, Attila Demeny, Mihaly Posfai
Summary: Based on the study of Lake Neusiedl in Austria, it has been observed that dolomite can form in shallow marine and lacustrine environments, with the composition mainly consisting of Mg calcite particles. These particles are stored in a relatively ordered form within the Mg calcite, and it is suggested that the formation of dolomite may be induced by the fluctuation of Mg and Ca concentrations in the lake water.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Biochemistry & Molecular Biology
Katarina Vojisavljevic, Slavica M. M. Savic, Milica Pocuca-Nesic, Aden Hodzic, Manfred Kriechbaum, Vesna Ribic, Aleksander Recnik, Jelena Vukasinovic, Goran Brankovic, Veljko Djokic
Summary: Developing highly efficient semiconductor metal oxide (SMOX) sensors that can accurately and quickly respond to environmental humidity is a difficult task. This study used a KIT-5-mediated synthesis method to create mesoporous tin (IV) oxide replica (SnO2-R) with controlled pore size and ordering, compared to a sol-gel synthesized powder (SnO2-SG). The SnO2-R-based sensor demonstrated excellent humidity sensing performances at room temperature, with low hysteresis error, high sensitivity, and swift response/recovery speed, attributed to its specific pore structure and increased oxygen-related defects.
Article
Chemistry, Multidisciplinary
Vesna Ribic, Vanja Jordan, Sandra Drev, Janez Kovac, Goran Drazic, Aleksander Recnik
Summary: Water interaction with mineral surfaces is crucial for photocatalytic processes. This study investigates the atomistic structure, atomic structure, and surface chemistry of fibrous rutile TiO2 in the presence of water. The results show that the specific interface structure can induce acidic response in a neutral medium.
ADVANCED MATERIALS
(2023)
Article
Engineering, Environmental
Qi Yuan, Jianzhong Xu, Lei Liu, Aoxing Zhang, Yanmei Liu, Jian Zhang, Xin Wan, Mengmeng Li, Kai Qin, Zhiyuan Cong, Yuhang Wang, Shichang Kang, Zongbo Shi, Mihaly Posfai, Weijun Li
Summary: The study identifies light-absorbing tarballs in particles collected on the northern slope of the Himalayas, with about 28% of individual particles being tarballs. These tarballs, emitted from biomass burning in the Indo-Gangetic Plain, have a significant heating effect in the Himalayan atmosphere. The findings suggest that long-range transport of tarballs may play a crucial role in climate effects and glacial melting in the Himalayas.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Abu Talha Aqueel Ahmed, Sankar Sekar, Shubhangi S. Khadtare, Nurul Taufiqu Rochman, Bathula Chinna, Abu Saad Ansari
Summary: In this study, MnCo2S4 nanosheet catalyst was successfully synthesized and found to exhibit superior performance in hydrogen evolution. Compared to MnCo2S4, MnCo2S4 showed low overpotentials, moderate Tafel slope, and excellent sustainability. The outstanding performance can be attributed to the increased number of electrochemically active sites and enhanced electronic conductivity on the catalyst surface.
Article
Chemistry, Multidisciplinary
Victor V. Maltsev, Elena A. Volkova, Elizaveta V. Koporulina, Diana D. Mitina, Vladimir L. Kosorukov, Anna I. Jiliaeva, Daniil A. Naprasnikov, Konstantin N. Gorbachenya, Viktor E. Kisel
Summary: The phase relationships, crystal properties and luminescence kinetics of two complex systems were studied, including unit cell parameters, segregation coefficients of impurities, and lifetimes of energy levels.
Article
Chemistry, Multidisciplinary
Xiaoman Zhang, Wangwang Xu, W. J. Meng, Andrew C. Meng
Summary: This study successfully grew high-quality single crystal AlScN nanowires through ultra-high vacuum reactive sputtering technique and characterized their structure and properties. The nanowires exhibit significantly reduced mosaic spread and predominantly single ferroelectric domains, as well as a high piezoelectric constant.
Article
Chemistry, Multidisciplinary
Tom E. de Vries, Elias Vlieg, Rene de Gelder
Summary: Networks are important for describing relationships between people, roads between cities, reactions between chemicals, and other interactions. Bipartiteness, dividing the network into two groups, can facilitate the study of the network's structure. We have developed an algorithm that can find a near-optimal bipartisation within a reasonable time frame and used it to uncover the hidden structure of the CSD cocrystal network.
Article
Chemistry, Multidisciplinary
Chuchu Han, Jing Yang, Xin Zhang, Aisen Li, Jiang Peng
Summary: An elastic crystal based on a photo-reactive acylhydrazone derivative is reported, which exhibits reversible bending behavior under UV irradiation and heating. The crystal undergoes reversible E<->Z isomerization under light and heating conditions. The crystal demonstrates excellent elastic properties and the bending can be controlled to control the output direction of red light.
Article
Chemistry, Multidisciplinary
Lingfeng Zhang, Yu Wang, Yefeng Wang, Shuai Liu, Na Zhang, Mingmin Yang, Haixia Ma, Zhaoqi Guo
Summary: This study designs and synthesizes a series of high-energy salts compounds without heavy metal ions and azide groups. The molecular structures and stability of the compounds are confirmed through single-crystal X-ray diffraction and intermolecular interaction analysis. Furthermore, the thermal stability, energetic properties, and electrical initiation properties of the compounds are investigated, suggesting their potential as primary explosives.
