Raman spectroscopy as a powerful technique in the characterization of ferrofluids

Uptake of Zn2+ and As3+ from Wastewater by Adsorption onto Imine Functionalized Magnetic Nanoparticles

“…For instance, the strong peak observed at 1600 cm −1 ascribed to C=O and C=N, and weak peaks at 1200 cm −1 and 1100 cm −1 in the spectra of MNP-Maph assigned to C-N and C-O respectively are indicative of the presence of imine ligand on the surface of magnetic nanoparticles. Similar results have also been reported by Rubim et al (2001), and Panta and Bergmann (2015) [34,35].…”

Raman spectroscopy investigation of magnetite nanoparticles in ferrofluids

“…For correct assignment of the band positions present in our samples and for phase identification, we used combined Raman data for key iron oxides bands [8,9,11,22], from where: The surfactant assisted A-MFs showed very good colloidal stability. The TMAOH concentration in these fluids is not sufficient for detection and will not be discussed.…”

“…Contributions to Raman spectroscopy investigations of nanosized iron oxides have already been reported, with some special emphasis on the works of da Faria et al [9] and Shebanova and Lazor [10]. Some ferrofluid investigations involving this vibrational spectroscopy have also been made, where the preparative techniques yield either dried [11], precipitated [12], or frozen [13] samples to be measured. In our investigations, we used a simple procedure to probe the state of the magnetic core in liquid surrounding at normal conditions.…”

Surface-enhanced Raman spectra of magnetic nanoparticles adsorbed on a silver electrode

“…Several groups have tried to use Raman spectroscopy to investigate the chemical structure of magnetic nanoparticles and the majority of the work was done using water based magnetic fluids [9][10][11][12][13][14][15][16][17][18][19][20]. However, Raman scattering is a very weak process, with molecular cross sections ranging from 10 À29 to 10 À32 cm 2 [21].…”