Results 51 to 60 of about 92,639 (291)

Mechanism and kinetics of magnetite oxidation under hydrothermal conditions

RSC Advances, 2019
The stability of magnetite under oxidizing hydrothermal conditions was evaluated at temperatures of 120, 150, 180 and 275 °C. A well-characterized sample of commercially-available magnetite with a particle size of approximately 690 nm was oxidized by ...
Zimin Li, C. Chanéac, G. Berger, S. Delaunay, A. Graff, G. Lefèvre   +5 more
semanticscholar   +1 more source

Micro‐ and Nano‐Bots for Infection Control

Advanced Materials, EarlyView.
This review presents a strategic vision for integrating micro‐ and nanobots in the pipeline for infection diagnosis, prevention, and treatment. To develop these robots as a practical solution for infection management, their design principles are clarified based on their propulsion mechanisms and then categorized infection management domains based on ...
Azin Rashidy Ahmady, Shadman Khan, Hong Han, Wei Gao, Zeinab Hosseinidoust, Tohid F. Didar   +5 more
wiley   +1 more source

Development of non‐destructive analytical strategies based on Raman spectroscopy and complementary techniques for Mars Sample Return tested on Northwest Africa 1950 Martian meteorite

Journal of Raman Spectroscopy, Volume 53, Issue 12, Page 2068-2085, December 2022., 2022
A non‐destructive analytical methodology, based on Raman microscopy (single point and imaging), micro‐energy dispersive X‐ray fluorescence (μED‐XRF) imaging analysis, and scanning electron microscopy coupled to energy dispersive spectroscopy (SEM‐EDS), is suggested for a first analytical characterization for the Martian samples that will be taken to ...
Leire Coloma, Cristina García‐Florentino, Jennifer Huidobro, Imanol Torre‐Fdez, Julene Aramendia, Gorka Arana, Kepa Castro, Juan Manuel Madariaga   +7 more
wiley   +1 more source

Defect Generation and Evolution in Irradiated Epitaxial Films and Heterostructures of Fe3O4 and Cr2O3

Advanced Materials Interfaces, EarlyView.
The functionality of nuclear structural materials, sensors, and microelectronics in radiation environments relies on understanding defect generation and evolution processes in oxide layers. The initial radiation response of Fe3O4 epitaxial thin films is characterized by the formation of large vacancy clusters, but these defects do not lead to lattice ...
Tiffany C. Kaspar, Maciej O. Liedke, Kayla H. Yano, Jijo Christudasjustus, Hyosim Kim, Yongqiang Wang, Mark E. Bowden, George E. Sterbinsky, Maik Butterling, Eric Hirschmann, Andreas Wagner, Daniel K. Schreiber   +11 more
wiley   +1 more source

Thermal conductivity and phonon anharmonicity of chemical vapor transport grown and mineral–FeS2 single crystals: An optothermal Raman study

Journal of Raman Spectroscopy, Volume 54, Issue 1, Page 84-92, January 2023., 2023
This work presents thermal conductivity and Raman mode anharmonicity of single crystalline CVT‐grown (1–3 mm) and natural FeS2 samples by applying optothermal Raman (OTR) technique. Big thermal conductivity difference at 100 K between synthetic and mineral samples arising as a result of different defect concentrations is captured successfully by OTR ...
Ayberk Özden, Esteban Zuñiga‐Puelles, Jens Kortus, Roman Gumeniuk, Cameliu Himcinschi   +4 more
wiley   +1 more source

Micro- to nano-sized solid inclusions in magnetite record skarn reactions [PDF]

European Journal of Mineralogy
Magnetite is a widespread ore mineral in skarn systems and usually hosts a wide variety of inclusions. Micro- to nano-sized solid inclusions in magnetite are unique tools to track the evolutionary processes of its host mineral and, subsequently, to ...
I. González-Pérez, J. M. González-Jiménez, L. Yesares, A. Acosta-Vigil, J. Llopís, F. Gervilla, F. Gervilla   +6 more
doaj   +1 more source

Oxidation induced strain and defects in magnetite crystals

Nature Communications, 2019
Oxidation of magnetite (Fe3O4) has broad implications in geochemistry, environmental science and materials science. Spatially resolving strain fields and defect evolution during oxidation of magnetite provides further insight into its reaction mechanisms.
Ke Yuan, Sang Soo Lee, W. Cha, A. Ulvestad, Hyunjung Kim, Bektur Abdilla, N. Sturchio, P. Fenter   +7 more
semanticscholar   +1 more source

Thermal Dynamics Induced by Surface Acoustic Waves in Lanthanide‐Doped Core@Multishell Nanoparticles

Advanced Optical Materials, EarlyView.
Accurate local temperature readout in integrated nanoscaled devices driven by high‐frequency surface acoustic waves (SAWs) has a strong technological interest. This image illustrates how lanthanide‐doped core@multishell nanoparticles can be employed as local temperature probes in SAW applications.
Pablo B. Pinto, Pedro W. Matrone, Flávia S. Ferreira, Paulo V. Santos, Fernando A. Sigoli, Odilon D. D. Couto Jr.   +5 more
wiley   +1 more source

Accumulation of magnetite by flotation on bubbles during decompression of silicate magma

Scientific Reports, 2019
Magnetite (Fe3O4) is an iron ore mineral that is globally mined especially for steel production. It is denser (5.15 g/cm3) than Earth’s crust (~2.7 g/cm3) and is expected to accumulate at the bottom of melt-rich magma reservoirs.
Jaayke L. Knipping, J. Webster, A. Simon, F. Holtz   +3 more
semanticscholar   +1 more source

Responsive Mn‐Ferrite Nanoparticles for Multicolor Magnetic Particle Imaging, Sensing, and Reactive Oxygen Species Degradation

Advanced Sensor Research, EarlyView.
Magnetic particle spectroscopy and imaging represent promising tools, particularly when combined with manganese‐ferrite nanoparticles as versatile theranostic agents. Adjusting the manganese content allows for simultaneous multi‐color tracer detection and reactive oxygen species sensing via magnetic particle spectroscopy and imaging, creating new ...
Fabian H. L. Starsich, Julia Feye, Robert Niβler, Gabriela Da Silva André, Elena Totter, Konrad Scheffler, Florian Thieben, Erik Mayr, Jochen Franke, Tobias Knopp, Inge K. Herrmann   +10 more
wiley   +1 more source