Raman microscopy

In this work, Al-doped ZnO and Fe-doped ZnO nanoparticles have been synthesized through the coprecipitationannealing method to create new and safer UV filters for sunscreen. The effects of metal doping on phase composition, crystal structure, surface morphology, specific surface area, and elemental composition were characterized by X-ray diffraction, Raman spectroscopy, field emission electron scanning microscopy, nitrogen adsorption-desorption experiments and energy-dispersive X-ray spectroscopy, respectively.

8p dianmotminh02 03-05-2024 2 1   Download

CuO nanoparticles were synthesized by alcohol-assisted hydrothermal method at various pH values, using sodium hydroxide as a precursor for pH control. The chemical composition, morphological and structural properties of the obtained CuO nanoparticles were investigated by the Raman and energy-dispersive X-ray spectroscopies, the field-emission scanning electron microscopy, and the X-ray diffraction.

12p dianmotminh02 03-05-2024 2 1   Download

Ebook "Imaging technologies and data processing for food engineers" provides information on imaging techniques such as electron microscopy, laser microscopy, x-ray tomography, raman and infrared imaging, together with data analysis protocols. It addresses the most recent advances in imaging technologies and data analysis of grains, liquid food systems (i.e. emulsions and gels), semi-solid and solid foams (i.e. bakery products, dough, expanded snacks), protein films, fruits and vegetable confectionery and nuts.

357p tudohanhtau1006 29-03-2024 2 1   Download

Mesoporous TiO2 mixed with NiTiO3 at various concentrations was synthesized by combining solegel and eco-friendly hydrothermal methods. The properties of the NiTiO3eTiO2 (NTOeTi) photocatalyst were characterized using Х-ray diffraction, Raman spectroscopy, scanning electron microscopy, Fouriertransform infrared spectroscopy, BrunauereEmmetteTeller adsorption, energy dispersive X-ray, and UV evis absorption spectra techniques.

8p viberbers 09-08-2023 7 3   Download

We report the effects of magnetic ordering on the temperature evolution of the Raman modes in nanocrystalline Dy3Fe5O12. The Dy3Fe5O12 was synthesized by an aqueous solegel method. X-ray diffraction, Raman spectroscopy and transmission electron microscopy studies revealed the phase purity and nanocrystalline nature.

7p viberbers 09-08-2023 6 3   Download

Titanium dioxide/graphene aerogel (TiO2/GA) was synthesized via a one-pot hydrothermal method and characterized by various spectroscopic techniques, including X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscope, transmission electron microscopy, Raman spectroscopy, and UV-Vis spectroscopy.

10p viberbers 09-08-2023 4 3   Download

In this study, ZnO/MoS2 heterostructure nanowires have been successfully grown on Si/Au substrates by a one-step co-evaporation method. The crystalline phase, surface morphology, and optical properties have been investigated by means of X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), Raman, PL, and PLE spectroscopies.

11p vispiderman 15-06-2023 5 2   Download

In this study, tin oxide /reduced graphene oxide (SnO2/rGO) samples were prepared by hydrothermal method. The structural characteristics, phase composition, morphology and size of the samples were studied by X-ray diffraction, Raman scattering spectroscopy, and scanning electron microscopy, respectively.

8p vispiderman 15-06-2023 5 2   Download

The structural changes of the materials taking place during the sulfonation process were studied by means of low-temperature nitrogen adsorption, X-ray photoelectron spectroscopy, Raman spectroscopy, high resolution transmission electron microscopy, and both the titrimetric and elemental analyses.

11p vironald 15-12-2022 7 2   Download

CuO nanorods were prepared by thermal oxidation method in ozone ambient. The effect of annealing temprature in the range from 400 to 600 oC on morphology and structure of nanorods was studied thouroughly by scanning electron microscopy (SEM) and X-ray diffraction, combining with energy dispersive spectroscopy (EDS) and Raman spectroscopy.

7p vimelindagates 18-07-2022 11 3   Download

This report presented an effective way to synthesize MnO2/graphene nanocomposites using the plasma electrolysis method for photocatalytic degradation of methyl orange dye in water. The morphology, structure, and chemical composition of MnO2/graphene nanocomposites materials were investigated through scanning electron microscopy (SEM), Raman spectra, and Fouriertransform infrared (FTIR) spectroscopy, respectively.

7p vimelindagates 18-07-2022 11 3   Download

Petrified wood samples are found within terrestrial sediments belonging to the Late Oligocene-Early Miocene Danişmen Formation in Malkara-Keşan located in the southwest of the Thrace Basin. The petrified wood in both regions is usually silicified and partly coalified. The silicification of the Tertiary wood in the Malkara-Keşan region is associated with volcanic activity and coeval sedimentation. Thin sections from petrified wood samples were taken as transverse, tangential, and radial sections.

22p tanmocphong 29-01-2022 24 1   Download

The crystal transformation process of magnesium carbonate hydrate by the reaction of magnesium sulfate (MgSO4) with ammonium carbonate [(NH4)2CO3] was investigated. MgSO4 is one of the main magnesium resources of the Lop Nur salt lake in the Xinjiang Autonomous Region of China. Magnesium carbonate hydrates with different chemical compositions were prepared. The transformation process of the 2 crystals, MgSO4 and (NH4)2CO3, was analyzed by Raman spectroscopy, and the associated changes in crystal morphology were observed by scanning electron microscopy.

11p langthannam 29-12-2021 13 0   Download

The charge and size of molecules chemically attached to nanoparticles (NPs) play an important role in their interaction behavior in suspensions. Gold nanoparticles (AuNPs) were modified systematically with peptides and the modification was verified with surface-enhanced Raman scattering (SERS). The behavior of the modified AuNPs in suspension and at the liquid–solid interface was monitored using small angle X-ray scattering (SAXS), UV/Vis spectroscopy and dynamic light scattering (DLS) in suspension, and atomic force microscopy (AFM) at the solid– liquid interface.

15p langthannam 29-12-2021 13 0   Download

: Porous magnetite (Fe3 O4 ) and hematite (α-Fe2 O3 ) nanoparticles were prepared via the sol-gel auto-combustion method. The gels were prepared by reacting ferric nitrates (as oxidants) with starch (as fuel) at an elevated temperature of 200 °C. Different ratios (Φ) of ferric nitrates to starch were used for the synthesis (Φ = fuel/oxidant).

17p langthannam 29-12-2021 8 0   Download

The hydrothermal growing conditions such as temperature and time were investigated by Xray diffractometry (XRD), Raman scattering, as well as Scanning Electron Microscopy (SEM). It is shown that the as-prepared ZnO nanorod was grown well-vertically on the substrate. Furthermore, we investigated the photocatalytic activity of synthesized samples, which showed the enhanced photodegradation ability in the composite sample.

10p meyerowitz 25-12-2021 15 0   Download

In this paper "Nanostructured poly (3-octyl thiophene) films prepared by electrophoretic deposition", the preparation and properties of the nanoparticles of poly (3-octyl thiophene) (marked as P3OT) were presented. The EPD was adopted to prepare the polymer films. The properties of material were study by Raman, UV-Vis spectra, electron scanning microscopy (SEM), cyclic voltammetry (CV) and photocurrent measurements.

5p thienlangso 15-12-2021 21 2   Download

In this study, the effects of starting material types on graphene oxide (GO) are reported with the aim of developing graphene (GR) synthesis. The GOs were prepared from natural graphite (NG) powder and graphite nanoplate (GNp) based on the Hummers method. Two kinds of GR were successfully synthesized using GOs, which were prepared from NG and GNp in the presence of hydrazine and ammonia for 24 h at a 100◦C reaction temperature.

14p tudichquannguyet 29-11-2021 15 3   Download

Freestanding tin oxide-boron oxide/reduced graphene oxide (SnO2 -B2 O3 /rGO) nanocomposite anode was produced for Li-ion cells. This binder-free flexible paper anode structure was fabricated by combining SnO2 -B2 O3 composite and graphene oxide which were synthesized through the sol–gel method and Hummers’ method, respectively. Field emission gun scanning electron microscopy, high-resolution transmission electron microscopy, energy dispersive X-ray spectrometer, Fourier transform infrared spectroscopy, Raman spectroscopy, and X-ray diffraction were utilized to characterize anode materials.

14p tudichquannguyet 29-11-2021 4 0   Download

The purpose of this study was to compare the adsorption behavior of cationic and anionic dyes onto a hexagonal boron nitride (hBN) nanostructure that was rich in a negative charge. Herein, the hBN nanostructure was synthesized using boric acid as a precursor material. The characteristic peaks of the hBN nanostructure were performed using Fourier transform infrared (FT-IR) and Raman spectroscopies. The morphology and the particle size of hBN nanostructure were determined by transmission electron microscopy (TEM) and scanning electron microscopy (SEM).

12p tudichquannguyet 29-11-2021 7 1   Download