Magnetite nanoparticles as-prepared and dispersed in Copaiba oil: study using magnetic measurements and Mössbauer spectroscopy

Abstract

and Mössbauer hyperfine parameters which were related to the interactions of Copaiba oil polar molecules with iron cations on magnetite nanoparticle's surface.

Study of Iron oxide nanoparticles using Mössbauer spectroscopy with a high velocity resolution

“…The EDS data recorded from our nominal samples lowering from 295 K down to low temperatures. Moreover, these spectra revealed asymmetrical six-line patterns with broad lines at 295 K and narrower lines at 90 and 21 K. As previously reported usual physical model accounting for the Iron cations at the tetrahedral (A) and octahedral [B] positions in magnetite cannot be used for a good spectra fit at the measured temperatures [16,17]. Therefore, as shown in Fig.…”

“…(see examples in [6][7][8][9]). Recently it was shown that Mössbauer spectroscopy with a high velocity resolution opened up new possibilities of this technique in the study of various Iron containing materials (see [10][11][12][13][14] Iron oxide nanoparticles using Mössbauer spectroscopy with a high velocity resolution showed new results [15][16][17][18]. In this study we review the results obtained from the study of magnetite, maghemite and mixed maghemite/magnetite nanoparticles developed for magnetic fluids using Mössbauer spectroscopy with a high velocity resolution.…”

Mössbauer Spectroscopy with a High Velocity Resolution in the Studies of Nanomaterials

“…Copaiba oil was collected from the Brazilian rainforest Copaifera tree ( Copaifera Langsdorffii Desf. ) and used for preparation of magnetic fluids [ 69 , 70 , 71 , 72 , 73 ]. TEM and HRTEM images of as-prepared Fe 3 O 4 nanoparticles are shown in Figure 30 .…”

“…Adapted from Ref. [ 71 ] with permission from Springer Nature: Hyperfine Interactions, “Magnetite nanoparticles as-prepared and dispersed in Copaiba oil: Study using magnetic measurements and Mössbauer spectroscopy”, Oshtrakh M.I., Ushakov M.V., Semenova A.S., Kellerman D.G., Šepelák V., Rodriguez A.F.R., Semionkin V.A., Morais P.C., ©2013.…”