Magnetite Fe O Nanocrystals: Spectroscopic Observation …

2003-8-5 · Magnetite Fe3O4 Nanocrystals: Spectroscopic Observation of Aqueous Oxidation Kinetics† Jing Tang, Matt Myers,‡ Ken A. Bosnick, and Louis E. Brus* Department of Chemistry, Columbia UniVersity, New York, New York 10027 ReceiVed: September 22, 2002 Low-temperature oxidation of aqueous magnetite nanoparticles to maghemite has been monitored …

Raman Spectroscopy of Iron Oxide Nanoparticles | …

Modesto Lopez LB, Pasteris JD, Biswas P (2009) Sensitivity of micro-Raman spectrum to crystallite size of electrospray-deposited and post-annealed films of iron-oxide nanoparticle suspensions. Appl Spectrosc 63:627–634 CrossRef Google Scholar

Fe3O4-protected gold nanoparticles: New plasmonic …

2021-10-1 · The low intensity of the Raman background generated by an Fe 3 O 4 layer deposited on gold cores can be also deduced from the intensity of the Raman signal recorded for a layer of [email protected] 3 O 4 nanoparticles deposited on a cleaned platinum plate (we used the same deposition procedure for the [email protected] 3 O 4 nanoparticles as in ...

Green Synthesis of Spinel Magnetite Iron Oxide …

Spinel magnetite Fe3O4 nanoparticles were synthesized using rambutan peel waste extract as a green ligation and chelating agent. The green synthesized nanoparticles were characterized employing X-ray diffraction (XRD), Raman spectroscopy, FTIR spectroscopy and transmission electron microscopy (TEM) studies. The XRD study revealed spinel phase hda a magnetite …

Synthesis of ?-Fe2O3, ?-Fe2O3 and Fe3O4 Nanoparticles …

2018-11-24 · Different phases of iron oxides nanoparticles have been synthesized by electrochemical method using iron plate as anode with various materials as cathode and aqueous solutions electrolyte. The synthesized nanoparticles characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and UV …

RAMAN SPECTROSCOPY OF IRON OXIDE OF …

Nanoparticles of iron oxide (Fe3O4) were obtained by coprecipitation with synthesis time of 30, 60 and 90 min. The morphology of the samples was investigated by scanning electron microscopy (SEM) and structural characteristics were obtained by Xray diffraction (XRD). The crystallite size was calculated from the spectrum X-ray diffraction with the application of the Scherrer …

Highly water-soluble magnetic iron oxide (Fe3O4 ...

2018-4-18 · iron oxide (Fe3O4) nanoparticles for drug delivery: enhanced in vitro therapeutic efficacy of doxorubicin and MION conjugates. Journal Of Materials Chemistry B, 1 (22), 2874-2884. Highly water-soluble magnetic iron oxide (Fe3O4) nanoparticles for drug

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

Raman Spectroscopy of Iron Oxide of Nanoparticles

2020-1-29 · Raman Spectroscopy of Iron Oxide of Nanoparticles (Fe 3 O 4) Panta PC1,2* and Bergmann CP1 1Ceramic Materials Laboratory, Federal University of Rio Grande do Sul, Av. Osvaldo Aranha 99, sl. 705C, CEP 90035-190, Porto Alegre, RS, Brazil

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. …

Vibrational properties of nanoparticles iron oxide by ...

Vibrational properties of nanoparticles iron oxide by Raman spectroscopy. The crystal structure and atomic dynamics of Fe 3 O 4 nanoparticles have been studied. The crystal structure of iron oxide nanoparticles was determined by X-ray diffraction. The analysis showed that the crystal structure of d ≈ 50-100 nm dimensional iron oxide ...

[PDF] Raman spectroscopy of iron oxides and (oxy ...

SUMMARY Raman spectroscopy uses the inelastic scattering of electromagnetic radiation by molecules. Monochromatic light of a laser interacts with phonons, the vibrational modes in the crystal lattice. The energy of the scattered light is shifted by the scattering. The shifts in energy yield the Raman spectrum that is specific for each mineral because the phonons are specific …

Raman spectroscopy to unravel the magnetic properties …

Raman spectroscopy to unravel the magnetic properties of iron oxide nanocrystals for bio-related applications† Mart´ın Testa-Anta, a Miguel A. Ramos-Docampo, a Miguel Comesana-˜ Hermo, b Beatriz Rivas-Murias a and Veronica Salgueiri´ ˜no *a Iron oxide nanocrystals have become a versatile tool in biomedicine because of their low cytotoxicity while

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

2009-6-1 · 1 Introduction. Raman spectroscopy is a fast tool to distinguish iron oxides, hydroxides and oxyhdroxides. The method has been used for the analysis of corrosion products (Oh et al. 1998; Thibeau et al. 1978) or oxide scales formed in production processes (Bhattacharya et al. 2006), the characterization of pigments in archaeological material (Clark & Curri 1998; …

Micro‐Raman investigation of iron oxide films and …

1999-5-10 · Abstract Films and powders of iron oxide (Fe2O3) prepared by two different sol–gel syntheses, starting from Fe(NO3)3·9H2O or FeCl3·6H2O, were investigated by Raman microscopy. Different phases with...

Fe3O4 Magnetic Nanoparticles Under Static Magnetic …

The spectrum recorded with 2.4 mW shows broadened bands around 350 cm −1, 500 cm −1, and 700 cm −1, indicated the oxidation of magnetite and the appearance of new iron oxide phase – maghemite (γ-Fe 2 O 3). 29 The development of an additional peak at about 700 cm −1 confirms the first stage of magnetite oxidation (red line).

Raman Spectroscopy of Iron-Oxide Core-Corona ...

2020-12-16 · Abstract The morphology and composition of metal–oxide coronaparticles after the thermal oxidation of iron particles within the temperature range of 25–600°C under atmospheric conditions were investigated by in situ Raman-scattering spectroscopy.

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

Frontiers | Surface Study of Fe3O4 Nanoparticles ...

Surfaces of iron oxide of ferrimagnetic magnetite (Fe3O4) nanoparticles (MNPs) prepared by Massart''s method and their functionalized form (f-MNPs) with succinic acid, L-arginine, oxalic acid, citric acid, and glutamic acid were studied by …

ATR-FTIR VERSUS RAMAN SPECTROSCOPY USED FOR …

2019-9-4 · nanoparticles in water. The oxidation of magnetite to maghemite was studied in IONPs water based solution via Raman and ATR-FTIR spectroscopy. Magnetite (Fe3O4) and maghemite (γ-Fe2O3) are the main forms of iron oxide. Magnetite nanoparticles are not very stable under ambient conditions, and are easily oxidized to maghemite.

Raman Spectroscopy of Iron Oxide of Nanoparticles …

2021-11-22 · Nanoparticles of iron oxide (Fe3O4) were obtained by Coprecipitation with synthesis time of 30, 60 and 90 min. The morphology of the samples was investigated by scanning electron microscopy (SEM ...

Structural and functional investigation of graphene oxide ...

2014-4-4 · Graphene oxide–iron oxide (GO–Fe3O4) nanocomposites were synthesised by co-precipitating iron salts onto GO sheets in basic solution. The results showed that formation of two distinct ...

Guanidine-functionalized Fe3O4 magnetic nanoparticles as ...

2015-5-19 · Two organic superbases, 1,5,7-triazabicyclo[4,4,0]dec-5-ene (TBD) and 1,1,3,3-tetramethylguanidine (TMG), were anchored onto silica-coated and uncoated iron oxide nanoparticles, resulting in three (MNP–TBD, MNP–TMG …

Superparamagnetic Behaviour and Surface Analysis of …

The superparamagnetic property of nanomaterials such as Fe 3 O 4 has been considered to be promising for various applications. In this paper, Fe 3 O 4 /PPY/CNT nanocomposites were synthesized with utilizing natural iron sand by a coprecipitation method. The as-precipitated Fe 3 O 4 NPs were combined with carbon nanotubes (CNTs) using conductive polypyrrole (PPY) as …

Spectroscopic investigation on the interaction of DNA …

2021-11-27 · M. Mehdipour et al. / interaction of DNA with superparamagnetic iron oxide nanoparticles Fe-O stretching of the iron oxide nanoparticles (Fig 4a). The broad band at 3423 cm-1 ascribed to the vibration of the hydroxyl groups and/or absorbed water molecules on the surface of the particles [24]. The spectrum of [email protected] exhibit

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

2019-3-1 · The iron oxide nanoparticles have been employed as vectors for drug, magnetic resonance imaging contrast agents, for adsorption of antibiotics and heavy metal and degradation of organic dyes, . The degradation of organic pollutants from water can be focused in clean energy sources [10], [21] .

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

2009-5-13 · Raman spectroscopy of iron oxides and (oxy)hydroxides at low laser power and possible applications in environmental magnetic studies Monika Hanesch, Department of Applied Geosciences and Geophysics, University of Leoben, Peter …

Synthesis, Characterization, and Study of Thermal …

2021-8-23 · Iron oxide nanoparticles (IONPs) have great importance due to their use in many biomedical applications such as contrast agents in MRI, repairing of tissues, detoxification of biological fluids, cell separation, drug delivery, immunoassay, and magnetic hyperthermia. One of the interesting properties of IONPs is to produce heat in the presence of an applied alternating …

Obtention by Coprecipitation and Magnetic …

2015-10-15 · Magnetic nanoparticles of iron oxide are synthesized into coated with polyethylene glycol and oleic acid, from the simultaneous precipitation of ions Fe +2 and Fe +3 in alkaline solution (NH 4 OH). The iron oxide magnetite has the …

Low Temperature Synthesis of Superparamagnetic Iron …

In the present study, a facile environmentally friendly approach was described to prepare monodisperse iron oxide (Fe3O4) nanoparticles (IONPs) by low temperature solution route. The synthesized nanoparticles were characterized …

SYNTHESIS AND RAMAN STUDY OF IRON OXIDE …

2019-11-19 · lattice parameters confirmed the formation of cubic spinel iron oxide (Fe3O4) having a space group of Fd3m (No. 227) without any trace of additional impurity. 3.2 Optical Study: 3.2.(a) Phonon Study of Iron oxide Nanoparticles: To study the optical properties Raman spectroscopy has been used as it can provide

Facile One-pot Transformation of Iron Oxides from Fe2O3 ...

2016-2-23 · Santra, S. et al. Synthesis and characterization of silica-coated iron oxide nanoparticles in microemulsion: the effect of nonionic surfactants. Langmuir 17, 2900–2906 (2001). CAS Google Scholar

Raman Spectroscopy of Iron Oxide Nanoparticles | …

Raman spectrum of Fe 2 O 3 NPs shows 217, 286, 404, 657, 1318 and 1607 cm À 1 bands, that are compatible with its previous reports. [27] The bands of …

Multifunctional graphene oxide/iron oxide nanoparticles ...

2019-6-6 · Graphene Oxide (GO) has recently attracted substantial attention in biomedical field as an effective platform for biological sensing, tissue scaffolds and in vitro fluorescence imaging. However, the targeting modality and the capability of its in vivo detection have not been explored. To enhance the functionality of GO, we combine it with superparamagnetic iron oxide …

Magnetic Fe3O4‐Au core‐shell nanostructures for surface ...

The nanoparticles, which display superparamagnetic properties due to the core Fe 3 O 4 material, exhibit a visible surface plasmon resonance (SPR) peaked at 580 nm due to the outer gold shell. The nanoparticles are used as a substrate for surface enhanced Raman scattering (SERS) with rhodamine 6G (R6G) as a Raman reporter molecule.

Synthesis and Characterization of Superparamagnetic …

The [email protected] composite nanoparticles were obtained from as-synthesized magnetite (Fe3O4) nanoparticles through the modified Stöber method. Then, the Fe3O4 nanoparticles and [email protected] composite nanoparticles were characterized by means of X-ray diffraction (XRD), Raman spectra, scanning electron microscope (SEM) and vibrating sample magnetometer …