Infrared and Raman spectroscopic studies on iron oxide ...

Infrared and Raman spectroscopic studies on iron oxide magnetic nano- particles and their surface modifications Ying- Sing Lia*, Jeffrey S. Church b, and Andrea L. Woodhead b a. Department of Chemistry, University of Memphis, Memphis, TN 38152

contact us

Physicochemical characterization and …

2013-6-6 · Iron oxide films with a nanoporous structure were grown by anodizing sputter-deposited Fe in a fluoride containing ethylene glycol solution and annealed under air exposure at different temperatures. X-ray diffraction and Raman spectroscopy allowed to identify the presence of hematite and/or magnetite after thermal treatment for films annealed at T ≥ 400 °C under air …

contact us

[Raman spectroscopic study on the iron oxide film …

Micro-Raman spectroscopy was used to investigate the chemical composition, microstructure and crystalline phase of an iron oxide sample with three-layer macro-structure prepared by iron oxidation. Two laser lines of 514 and 633 nm with a power of 0.5 mW on the sample were employed to excite the Rama …

contact us

In-situ Raman Spectroscopy for the Passive Oxide Film …

2019-10-9 · oxide may basically be considered an amorphous-like Fe(III) oxide and oxyhydroxide. In the Raman spectra of iron oxides and oxyhydroxides, Fe3O4, γ-Fe2O3, and -FeOOH δ possess the strongest peak at a Raman shift of about 600-700 cm-1 in the individual Raman peaks; for example, the strongest peak of Fe3O4 is 670 cm-1, γ-Fe 2O3 is 680 cm-1 ...

contact us

In-Situ Raman Spectroscopy of α

The characteristic Raman peaks gradually disappear as the potential is ... Once reduced at the oxide electrolyte interface, the rate of hydrogen evolution is the same.2 This suggests that the active ... ify the Raman peaks for the different iron oxyhydroxides. The prepa-

contact us

Structural and magnetic characterisation of a ...

The iron-oxide is in maghemite form, there are many peaks. Surprisingly, also nickel-oxide was identified. The gold has no Raman activity because of crystal symmetry. The peaks at 2018 1/cm and 2225 1/ cm are not true peaks but indicate background. The 2923 1/cm is the solvent peak and belongs to the C–H stretching region (2800–3100 1/cm) .

contact us

Epsilon iron oxide: Origin of the high coercivity stable ...

2017-7-1 · The identification of epsilon iron oxide (ɛ-Fe 2 O 3) as the low Curie temperature high coercivity stable phase (HCSLT) carrying the remanence in heated archeological samples has been achieved in samples from two …

contact us

SYNTHESIS AND RAMAN STUDY OF IRON OXIDE …

2019-11-19 · SYNTHESIS AND RAMAN STUDY OF IRON OXIDE NANOPARTICLES Kailash Sapnar1, Jayashree Pant2, Swati R. Gawali3* 1Department of Physics, Fergusson College, Pune 2 Department of Physics, Abasaheb Garware College, Pune 3 Department of Physics, CES''s Dr. Arvind B. Telang Sr. College, Nigdi, Pune. *Corresponding Author: [email protected]

contact us

Synthesis and SERS application of gold and iron oxide ...

The SERS intensity of the normalized Raman peak at 1175 cm-1 exhibited a log-linear relationship for MGITC concentrations between 2 × 10-10 and 2 × 10-5 M for [email protected]@BCNCs. These results suggest the potential of these hybrid nanocomposites for application in a broad range of analyte detection strategies.

contact us

Control of the shape and size of iron oxide (α-Fe2O3 ...

2017-1-1 · The peaks at 227.12 and 494.14 cm −1 are associated with the A 1g phonon mode while the peaks at 245.73, 292.74, 299, 409.9 and 609.4 cm −1 are related to E g phonon modes. These results prove that the calcined product is α-Fe 2 O 3. No other iron oxide, such as magnetite or maghemite, was detected, which indicates the high purity of the ...

contact us

Mössbauer and Raman spectroscopic characterization of …

2020-12-4 · Raman spectroscopy. Figure 1 shows a typical Raman spectra of the iron-loaded charcoal samples. Although there were not found significantly different spectral-shapes among the 30 measurement points for Fe-C750-1, Fe-C800-1 and Fe-C850-2, it was proved that the spectra showed a measurement-point dependence for Fe-C850-1 and Fe-C900-1 due to the sample …

contact us

Raman spectroscopy of iron oxide of nanoparticles ...

2015-9-14 · RAMAN SPECTROSCOPY OF IRON OXIDE OF NANOPARTICLES (Fe 3O 4) Panta P.C. 1,2, Bergmann C.P. 1 1Ceramic Materials Laboratory, Federal University of Rio Grande do Sul, Av. Osvaldo Aranha 99, sl. 705C, CEP 90035-190, Porto Alegre, RS, Brazil 2Department of Chemistry and Physics, University of Santa Cruz do Sul, Santa Cruz do Sul, Brazil, Av. …

contact us

Iron Oxide Nanoparticles: Biosynthesis, Magnetic Behavior ...

2021-2-15 · Iron oxide nanoparticles have attracted much attention because of their superparamagnetic properties and their potential applications in many fields such as magnetic storage devices, catalysis, sensors, superparamagnetic relaxometry (SPMR), and high‐sensitivity biomolecule magnetic resonance imaging (MRI) for medical diagnosis and therapeutics.

contact us

Raman spectroscopic analysis of iron chromium oxide ...

2015-3-9 · [Raman spectroscopic study on the iron oxide film prepared by iron oxidation method]. Hu T, Lu X, Yan Y, Fu YY, Zhang H, Zhang SL. Guang Pu Xue Yu Guang Pu Fen Xi, 24(9):1072-1074, 01 Sep 2004 Cited by: 0 articles | PMID: 15762525

contact us

Preparation, characterization and utilization of coreshell ...

2018-7-18 · Raman spectroscopy. Peaks at 213, 274, 384 and 474 cm-1 in Eg mode and peak at 584 cm-1 in A1g mode represented iron oxide, where these peak ranges were already reported [25,33]. In Fig 3B, in addition to the respective peaks for iron oxide, there observed a shoulder peak at 635 cm-1 which was due to

contact us

Raman Spectroscopy of Iron Oxide of Nanoparticles

2020-1-29 · Raman spectroscopy was employed to determine the nature of the iron oxide core (magnetite), where the Raman Effect is caused by the molecular effects produced from certain energy irradiated on the sample. However, it is known that magnetite has a weak Raman scattering, especially for lower laser powers that are low so that there

contact us

Aluminium doping in iron oxide nanoporous structures to ...

2019-11-27 · Raman spectra of (a) annealed iron oxide nanostructures and aluminium-doped iron oxide nanostructures for a doping time of (b) 1, (c) 3 and (d) 5 s Full size image The morphology of doped and undoped iron oxide nanostructures before annealing and after annealing are studied by FE-SEM images as shown in Fig. 3 .

contact us

Atmospheric pressure atomic layer deposition of iron …

2020-6-25 · The Raman spectra of the pristine Al 2 O 3 /SiO 2 /Si substrate before iron oxide deposition and the deposited one with 10 ALD cycles at 250 °C are shown in Fig. 7. Considering that γ-Alumina does not show any Raman peaks in the range of 100–1100-cm −l, it could be concluded that the observed Raman peaks at 520 and 960 cm −1 in the ...

contact us

Controlling the phase of iron oxide nanoparticles ...

2019-9-12 · 1 INTRODUCTION. Iron oxide particles generally occur in one of the four main crystallographic phases depending on the Fe oxidation state: magnetite (Fe 3 O 4), maghemite (γ-Fe 2 O 3), hematite (α-Fe 2 O 3), or wüstite (FeO), of which the first three are technologically the most relevant. 1, 2 The majority of the applicable potential of magnetite and maghemite lies …

contact us

Surface

Surface- and tip-enhanced Raman spectroscopy reveals spin-waves in iron oxide nanoparticles†. Raul D. Rodriguez * ab, Evgeniya Sheremet a, Tanja Deckert-Gaudig c, Corinne Chaneac d, Michael Hietschold a, Volker Deckert ce and Dietrich R. T. Zahn ab a Institute of Physics, Technische Universität Chemnitz, D-09107 Chemnitz, Germany.

contact us

Raman spectroscopy of iron oxides and (oxy)hydroxides …

2009-6-21 · The Raman spectrum of the synthetic goethite measured in this study (Fig. 1) corresponds to the spectra of this mineral shown in the literature (e.g. Oh et al. 1998). The combination of a strong peak at 385 cm−1 with clear peaks at 244, 299, 480, 548 and 681 cm−1 is easy to distinguish from any other spectrum. Synthetic goethite

contact us

Application of Raman Spectroscopy to Lubricants ...

2020-10-13 · Figure 2: Raman spectra of iron(II) phosphate and tricresyl phosphate reference samples ... The broad peaks observed ... In the study of titanium aluminum oxide, however, Raman was not able to identify a thin layer of aluminum oxide on the surface that was observed by other techniques (17). Diamond­like carbon is a particularly promising ...

contact us

Raman Spectroscopic Study of Solid Solution Spinel Oxides

2020-11-15 · for the inner corrosion layer indicates an iron chromium spinel oxide. Micro-Raman spectroscopy proves capable of determining structural and compositional differences between complex corrosion layers of stainless steels. iv

contact us

Raman spectroscopy of iron oxide of nanoparticles (Fe3O4)

Raman spectroscopy of iron oxide of nanoparticles (Fe3O4) 4 th International Conference and Exhibition on Materials Science & Engineering September 14-16, 2015 Orlando, USA. Panta P C and Bergmann C P. Federal University of Rio Grande do Sul, Brazil

contact us

Facile synthesis of iron oxide coupled and doped titania ...

Moreover formation of Fe 2 O 3 crystalline phase was confirmed from Raman spectral analysis as shown in Fig. 1b (insert), the characteristic Raman peak positions are little different from that of pure Fe 2 O 3 nanoparticles. 31 This …

contact us

Raman microspectroscopy of some iron oxides and ...

1998-12-4 · Hematite (α-Fe 2 O 3), magnetite (Fe 3 O 4), wüstite (FeO), maghemite (γ-Fe 2 O 3), goethite (α-FeOOH), lepidocrocite (γ-FeOOH) and δ-FeOOH were studied by Raman microscopy ch compounds have already been studied by Raman spectroscopy, but there are some disagreements in the reported data. Here, Raman microscopy was employed to …

contact us

Supporting Information Control of Positive and Negative ...

2020-9-16 · 2 S1 Raman spectroscopy to distinguish iron oxides Even though many iron oxides and oxyhydroxides produce Raman peaks between 660-680 cm−1, only magnetite shows a typical Raman signature with a strong peak around 661 cm−1 without peak splitting, and without further dominant peaks at higher or lower wave numbers.1,2 Thus, Raman spectroscopy can …

contact us

SiO2 raman spectrum | Raman for life

Raman spectroscopy of SiO 2. Raman spectroscopy is a powerful, nondestructive tool commonly applied to characterize SiO 2 films. Since Raman scattering in thin films is significantly affected by optical interference, the position of a particular peak is strongly correlated with the layer thickness of SiO 2.This peak is quite broad, and with decreasing layer thickness, it shifts to the low ...

contact us

Double-walled iron oxide nanotubes via selective chemical ...

2019-8-19 · (a) Raman spectra of three most common iron oxide phases; (b) Raman spectra of double walled nanotubes (peaks fit well with hematite); (c) X-ray diffraction patterns of double walled nanotubes ...

contact us

Raman spectroscopy of iron oxides and (oxy)hydroxides at ...

2020-1-29 · Raman spectroscopy was employed to determine the nature of the iron oxide core (magnetite), where the Raman Effect is caused by the molecular effects produced from certain energy irradiated on the sample. However, it is known that magnetite has a weak Raman scattering, especially for lower laser powers that are low so that there

contact us

Raman spectroscopy of iron oxides and (oxy)hydroxides at ...

Raman spectra were recorded between 200 and 1600 cm −1 to observe the characteristic peaks of iron oxides. The power of the laser was set at 0.1 mW to …

contact us

UCL Chemistry

2020-2-11 · Introduction to the site. Raman microscopy is now established as the technique that is most specific, sensitive, spatially refined and immune to interference for the non-destructive, in situ analysis of historical artefacts. To complement the increasing use of the technique in this field, the Raman spectra of sixty-four common pigments, both natural and synthetic, known to have …

contact us

Molecular Spectroscopy Workbench Raman Spectra of …

2014-11-11 · Raman Spectra of Metal Oxides Molecular Spectroscopy Workbench T he distinction between the vibrational analysis of an organic molecule, which can occur in a crystalline lattice, and that of a metal oxide, which normally occurs only in a crystalline lattice without a clearly defined molecular functional group, is an important one.

contact us

Copyright © 2007- AMC | Sitemap