A study of structure, morphology and optical properties of HfO2 powders synthesized by precipitation method

The composition, structure, morphology, and optical characteristics of hydrogenated amorphous silicon-oxycarbide (a-SiCxOyHz) materials were investigated as a function of experimental processing conditions and post-deposition thermal treatment. Thermal chemical vapor deposition (TCVD) was applied to the growth of three different types of a-SiCxOyHz films, namely, SiC-like (SiC1.08O0.07H0.21), Si-C-O (SiC0.50O1.20H0.22), and SiO2-like (SiC0.20O1.70H0.24). The resulting films were subsequently annealed at temperatures ranging from 500 °C to 1100 °C for 1 h in an argon atmosphere. The composition, structure, and morphology of as-deposited and post-annealed films were characterized by Fourier transform infrared spectroscopy (FTIR), x-ray photoelectron spectroscopy (XPS), Rutherford backscattering spectroscopy (RBS), nuclear-reaction analysis (NRA), and scanning electron microscopy. Corresponding optical properties were assessed by spectroscopic ultraviolet-visible ellipsometry (UV-VIS-SE). These studies led to the identification of an optimized process window for the growth of Er doped silicon oxycarbide (SiC0.5O1.0:Er) thin film with strong room-temperature photoluminescence emission measured around 1540 nm within a broad (460 nm to 600 nm) wavelength band. Associated modeling studies showed that the effective cross section for Er excitation in the SiC0.5O1.0:Er matrix was approximately four orders of magnitude larger than its analog for direct optical excitation of Er ions.

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Synthesis of mesoporous Fe-Mn bimetal oxide nanocomposite by aeration co-precipitation method: Physicochemical, structural, and optical properties

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2018.11.067 ◽

2019 ◽

Vol 224 ◽

pp. 65-72 ◽

Cited By ~ 6

Author(s):

Hadi Eslami ◽

Mohammad Hassan Ehrampoush ◽

Abbas Esmaeili ◽

Ali Asghar Ebrahimi ◽

Mohammad Taghi Ghaneian ◽

...

Keyword(s):

Optical Properties ◽

Precipitation Method ◽

Structural And Optical Properties ◽

Co Precipitation

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A study on structure, morphology, optical properties, and photocatalytic ability of SrTiO 3 /TiO 2 granular composites

Physica B Condensed Matter ◽

10.1016/j.physb.2017.04.028 ◽

2018 ◽

Vol 532 ◽

pp. 37-41 ◽

Cited By ~ 4

Author(s):

Le Thi Mai Oanh ◽

Nguyen Xuan Huy ◽

Doan Thi Thuy Phuong ◽

Do Danh Bich ◽

Nguyen Van Minh

Keyword(s):

Optical Properties ◽

Photocatalytic Ability ◽

Structure Morphology ◽

Granular Composites

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Study on Photodynamic Therapy for HL60 Cells Inactivation by Visible Light-Induced Fe-Doped Nano-TiO2 under Magnetic Field

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.152-153.136 ◽

2010 ◽

Vol 152-153 ◽

pp. 136-143

Author(s):

Yu Ying Xiong ◽

Cui Fen Liang ◽

Hua Xiao ◽

Jian Wen Xiong

Keyword(s):

Magnetic Field ◽

Optical Properties ◽

Photodynamic Therapy ◽

Leukemic Cells ◽

Precipitation Method ◽

Doping Content ◽

Fe Doping ◽

Nano Tio2 ◽

Doped Tio2 ◽

Tio2 Particles

Fe-doped TiO2 was prepared by a homogenous precipitation method and characterized by XRD, UV-Vis DRS. The structure and the optical properties of nano-TiO2 with different Fe doping content were studied, as well as the effect and the possible mechanics of different intensity of TiO2 particles, Fe-doped nano-TiO2 particles on the activity of HL60 leukemic cells. The influence on the activity of cells exposures in light compared with un-exposure also be analysed. As the photo sensitizers, TiO2 and Fe-doped TiO2 particles eliminated tumor cell using photodynamic therapy(PDT)under magnetic field.

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Structural and Optical Properties of Pure NiO Nanoparticles and NiO-Mn2O3, NiO-CdO, NiO-Pb2O3, NiO-ZnO Nanocomposites

Jordan Journal of Physics ◽

10.47011/14.5.2 ◽

2021 ◽

Vol 14 (5) ◽

pp. 409-417

Keyword(s):

Nickel Oxide ◽

Green Emission ◽

Hexagonal Structure ◽

Precipitation Method ◽

Nio Nanoparticles ◽

Structural And Optical Properties ◽

Suitable Material ◽

Structure Morphology ◽

Average Grain Size ◽

Co Precipitation

Abstract: Pure nickel oxide (NiO) nanoparticles and NiO-Mn2O3, NiO-CdO, NiO-Pb2O3, NiO –ZnO nanocomposites were synthesized by co-precipitation method. The PXRD studies revealed that NiO, Mn2O3 and CdO possessed cubic structure, Pb2O3 possessed monoclinic structure, ZnO possessed hexagonal structure and confirmed the presence of polycrystallinity nature of NiO and Mn2O3, CdO, Pb2O3, ZnO in the nanocomposites. The average grain size of NiO nanoparticles was found to be 30.10 nm using Debye Scherer’s formula. The FESEM images of NiO nanoparticles and their nanocomposites revealed spherical shaped structure and NiO-Pb2O3 revealed needle shaped rod-like structure. EDAX analysis confirmed the composition of NiO nanoparticles and their nanocomposites. Raman spectra exhibited characteristic peaks of pure NiO and that of NiO- Mn2O3, NiO-CdO, NiO- Pb2O3, NiO-ZnO in the synthesized nanocomposites. In the PL spectra, blue and green emission was observed in the samples. UV-vis spectra revealed the absorption peaks of NiO nanoparticles and their nanocomposites. Thus, the synthesized NiO- Mn2O3, NiO-CdO, NiO - Pb2O3 and NiO-ZnO nanocomposites can be a suitable material for electrocatalysis applications. Keywords: Nickel oxide nanocomposites, Structure, Morphology, Absorption, Luminescence.

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