Iron-oxide nanostructures with emphasis on nanowires

2017 ◽  
Author(s):  
U.P. Deshpande ◽  
T. Shripathi ◽  
A.V. Narlikar
Keyword(s):  
Iron Oxide ◽  
Quantitative Estimation ◽  
Local Environment ◽  
Grazing Incidence ◽  
Nanowire Growth ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oxide Nanostructures ◽  
Rotational Slip ◽  
Iron Oxide Nanostructures

This article examines the properties of iron-oxide nanostructures, with particular emphasis on nanowires. It begins with an overview of iron-oxide nanostructures and nanowires, followed by a discussion of the synthesis of aligned ?-Fe2O3 nanowires and nanosheets by a simple thermal oxidation route. It then describes the preferential bending of [110] grown ?-Fe2O3 nanowires about the C-axis and quantitative estimation of nanowire alignment using X-ray diffraction and grazing incidence X-ray diffraction. It also considers the growth mechanism of ?-Fe2O3 nanowires and nanosheets, different nanowire morphologies, rotational slip in ?-Fe2O3 nanosheets, and the influence of local environment and substrate microstructure on nanowire growth.

Top-down meets bottom-up — Electron-beam induced metalorganic deposition of amorphous iron oxide nanostructures

2009 ◽  
Vol 87 (1) ◽  
pp. 217-223 ◽  
Author(s):  
Simon Trudel ◽  
Ross H Hill
Keyword(s):  
Electron Beam ◽  
Iron Oxide ◽  
Single Point ◽  
Exposure Dose ◽  
Free Standing ◽  
Amorphous Iron ◽  
X Ray ◽  
Oxide Nanostructures ◽  
Metalorganic Deposition ◽  
Iron Oxide Nanostructures

We present the use of a metalorganic precursor, iron(III) 2-ethylhexanoate, as a precursor for the electron-beam induced deposition of amorphous iron oxide nanostructures. Exposing this precursor to an area dose of 1.560 mC/cm2 with 10 keV electrons affords a material that can be developed and was determined to be amorphous iron oxide when examined by TEM, electron diffraction, and energy dispersive X-ray spectroscopy. Single point exposure yields free-standing hollow nanorods with diameters from 85 to 255 nm controlled by the exposure dose. The patterning of sub 40 nm nanowires with low (<3 nm) line edge and width roughnesses is also presented.Key words: electron beam lithography, amorphous iron oxide, nanotubes, nanowires, coordination polymer precursor.

Probing the Interfacial Interaction in Layered-Carbon-Stabilized Iron Oxide Nanostructures: A Soft X-ray Spectroscopic Study

2015 ◽  
Vol 7 (15) ◽  
pp. 7863-7868 ◽  
Author(s):  
Hui Zhang ◽  
Jinyin Liu ◽  
Guanqi Zhao ◽  
Yongjun Gao ◽  
Tolek Tyliszczak ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Spectroscopic Study ◽  
Interfacial Interaction ◽  
X Ray ◽  
Oxide Nanostructures ◽  
Iron Oxide Nanostructures

New Structure of CTAB Templated Silica Films as revealed by GISAXS coupled to HRTEM

2000 ◽  
Vol 628 ◽  
Author(s):  
Sophie Besson ◽  
Catherine Jacquiod ◽  
Thierry Gacoin ◽  
André Naudon ◽  
Christian Ricolleau ◽  
...  
Keyword(s):  
Cetyltrimethylammonium Bromide ◽  
Grazing Incidence ◽  
Hexagonal Structure ◽  
X Ray Diffraction ◽  
Electronic Microscopy ◽  
Silica Films ◽  
X Ray ◽  
X Ray Scattering ◽  
Hexagonal Arrangement ◽  
Spherical Micelles

ABSTRACTA microstructural study on surfactant templated silica films is performed by coupling traditional X-Ray Diffraction (XRD) and Transmission Electronic Microscopy (TEM) to Grazing Incidence Small Angle X-Ray Scattering (GISAXS). By this method it is shown that spin-coating of silicate solutions with cationic surfactant cetyltrimethylammonium bromide (CTAB) as a templating agent provides 3D hexagonal structure (space group P63/mmc) that is no longer compatible with the often described hexagonal arrangement of tubular micelles but rather with an hexagonal arrangement of spherical micelles. The extent of the hexagonal ordering and the texture can be optimized in films by varying the composition of the solution.

Fluorine-mediated synthesis of anisotropic iron oxide nanostructures for efficient T2-weighted magnetic resonance imaging

Nanoscale ◽  
2021 ◽  
Author(s):  
Tao Sun ◽  
Yiding Liu ◽  
Chunyu Zhou ◽  
Liang Zhang ◽  
Xun Kang ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Iron Oxide ◽  
Controlled Synthesis ◽  
Resonance Imaging ◽  
Fluoride Ions ◽  
Oxide Nanostructures ◽  
Weighted Magnetic Resonance Imaging ◽  
Shape Controlled ◽  
Novel Strategy ◽  
Iron Oxide Nanostructures

Herein, we developed a novel strategy for the shape-controlled synthesis of fluorine-doped iron oxide nanostructures with superior r2 values through the introduction of fluoride ions as a morphology controlling agent...

scholarly journals Surface Stoichiometry and Depth Profile of Tix-CuyNz Thin Films Deposited by Magnetron Sputtering

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3191
Author(s):  
Arun Kumar Mukhopadhyay ◽  
Avishek Roy ◽  
Gourab Bhattacharjee ◽  
Sadhan Chandra Das ◽  
Abhijit Majumdar ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Photoelectron Spectroscopy ◽  
Film Surface ◽  
Grazing Incidence ◽  
X Ray Diffraction ◽  
X Ray ◽  
Relative Composition ◽  
Transmission Electron ◽  
Deposited Film ◽  
Deposited Films

We report the surface stoichiometry of Tix-CuyNz thin film as a function of film depth. Films are deposited by high power impulse (HiPIMS) and DC magnetron sputtering (DCMS). The composition of Ti, Cu, and N in the deposited film is investigated by X-ray photoelectron spectroscopy (XPS). At a larger depth, the relative composition of Cu and Ti in the film is increased compared to the surface. The amount of adventitious carbon which is present on the film surface strongly decreases with film depth. Deposited films also contain a significant amount of oxygen whose origin is not fully clear. Grazing incidence X-ray diffraction (GIXD) shows a Cu3N phase on the surface, while transmission electron microscopy (TEM) indicates a polycrystalline structure and the presence of a Ti3CuN phase.

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