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Three-dimensional CP-DNS of reacting iron particle dust clouds in a turbulent mixing layer are conducted. The simulation approach considers the Eulerian transport equations for the reacting gas phase and resolves all scales of turbulence,…

Ignition of iron particles in an oxidizing environment marks the onset of a self-sustained combustion. The objective of the current study is to quantitatively examine the ignition characteristics of fine iron particles governed by the…

Fluid Dynamics · Physics 2022-02-22 Xiaocheng Mi , Aki Fujinawa , Jeffrey M. Bergthorson

Iron oxide magnetic nanoparticles (NPs) are stimuli-responsive materials at the forefront of nanomedicine. Their realistic finite temperature simulations are a formidable challenge for first-principles methods. Here, we use density…

Materials Science · Physics 2019-11-01 Hongsheng Liu , Cristiana Di Valentin

The experiments on the impact of the size of magnetite clusters on various magnetic properties (magnetic moment, Curie temperature, blocking temperature etc.) have been carried out. The methods of magnetic separation, centrifuging of water…

Materials Science · Physics 2015-12-24 V. N. Nikiforov , A. N. Ignatenko , A. V. Ivanov , V. Yu. Irkhin

Molecular dynamics (MD) simulations are performed to investigate the thermal and mass accommodation coefficients (TAC and MAC, respectively) for the combination of iron(-oxide) and air. The obtained values of TAC and MAC are then used in a…

Fluid Dynamics · Physics 2023-06-09 L. C Thijs , E. Kritikos , A. Giusti , W. J. S Ramaekers , J. A. van Oijen , L. P. H de Goey , X. C. Mi

Nanoparticles (NPs) make for intriguing heterogeneous catalysts due to their large active surface area and excellent and often size-dependent catalytic properties that emerge from a multitude of chemically different surface reaction sites.…

Nanoparticles (NPs) formed in nonthermal plasmas (NTPs) can have unique properties and applications. However, modeling their growth in these environments presents significant challenges due to the non-equilibrium nature of NTPs, making them…

Computational Physics · Physics 2025-01-03 Matt Raymond , Paolo Elvati , Jacob C. Saldinger , Jonathan Lin , Xuetao Shi , Angela Violi

The growth of iron-containing nanostructures in the process of focused electron beam-induced deposition (FEBID) of Fe(CO)$_5$ is studied by means of atomistic irradiation-driven molecular dynamics (IDMD) simulations. The geometrical…

Materials Science · Physics 2023-09-06 Alexey Prosvetov , Alexey V. Verkhovtsev , Gennady Sushko , Andrey V. Solov'yov

Nanoparticles (NPs) which combine several magnetic phases offer wide perspectives for cutting edge applications because of the high modularity of their magnetic properties. Besides the addition of the magnetic characteristics intrinsic to…

The polyol route is a versatile and up-scalable method to produce large batches of iron oxide nanoparticles with well-defined structure and magnetic properties. Controlling parameters such as temperature and duration of reaction, heating…

Magnetic nanoparticles (MNPs) have been extensively used as tiny heating sources in magnetic hyperthermia therapy, contrast agents in magnetic resonance imaging (MRI), tracers in magnetic particle imaging (MPI), carriers for drug/gene…

Applied Physics · Physics 2021-06-16 Kai Wu , Jinming Liu , Renata Saha , Chaoyi Peng , Diqing Su , Andrew Yongqiang Wang , Jian-Ping Wang

Iron-oxide nanoparticles have been synthesized by high temperature arc plasma route with different plasma currents and characterized for their structure, morphology and local atomic order. Fe K-edge x-ray absorption spectra reveal distinct…

Materials Science · Physics 2014-01-16 C. Balasubramanian , B. Joseph , P. Gupta , N. L. Saini , S. Mukherjee , D. Di Gioacchino , A. Marcelli

This work studies the region of nanoparticle growth in atmospheric pressure carbon arc. Detection of the nanoparticles is realized via the planar laser induced incandescence (PLII) approach. Measurements revealed large clouds of…

The following laboratory procedure provides students with a hands-on experience in nanomaterials chemistry and characterization. This three-day protocol is easy to follow for undergraduates with basic chemistry or materials science…

Physics Education · Physics 2024-04-01 Armando D. Urbina , Hari Sridhara , Alexis Scholtz , Andrea M. Armani

Iron oxide nano particles with nominal Fe2O3 stoichiometry were synthesized by a wet, soft chemical method with the heat treatment temperatures from 250{\deg}C to 900{\deg}C in air. The variation in the structural properties of the nano…

Materials Science · Physics 2011-11-29 Debajeet K. Bora , Artur Braun , Selma Erat , Olga Safonova , Thomas Graule , Edwin C. Constable

The present study investigates the effect of different reaction times on the crystallinity, surface morphology and size of iron oxide nanoparticles. In this synthetic system, aqueous iron (III) nitrate (Fe(NO$_3$)$_3\cdot9$H$_2$O)…

Applied Physics · Physics 2021-10-29 Ioannis Papagiannis , Mauro S. Innocente , Evangelos I. Gkanas

This chapter describes the synthesis and some characteristics of magnetic iron oxide nanoparticles, mainly nanocubes, and focus on their self-assembly into crystalline cuboids in dispersion. The influence of external magnetic fields, the…

Soft Condensed Matter · Physics 2019-01-09 Sabine Rosenfeldt , Stephan Förster , Thomas Friedrich , Ingo Rehberg , Birgit Weber

The magnetic behavior of $Fe_{3-x}O_4$ nanoparticles synthesized either by high-temperature decomposition of an organic iron precursor or low-temperature co-precipitation in aqueous conditions, is compared. Transmission electron microscopy,…

Models and observations suggest that ice-particle aggregation at and beyond the snowline dominates the earliest stages of planet-formation, which therefore is subject to many laboratory studies. However, the pressure-temperature gradients…

Thermal plasma has emerged as an effective approach for producing carbon nanostructures without the need for specific catalysts nor substrates. While efforts have focused on the effect of process parameters such as reaction pressure, input…

Materials Science · Physics 2025-12-05 Taki Aissou , Jerome Menneveux , Fanny Casteignau , Nadi Braidy , Jocelyn Veilleux
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