scholarly journals Iron Oxide-Coupled Graphite/Fe–Si Steel Structure for Analog Computing from Recycling Principle

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 607
Author(s):  
Roberto Baca-Arroyo
Keyword(s):  
Raman Spectroscopy ◽  
Iron Oxide ◽  
Steel Structure ◽  
Oxide Thin Film ◽  
Coating Film ◽  
Analog Computing ◽  
Current Voltage ◽  
Graphite Structure ◽  
Graphite Lattice ◽  
Steel Foils

Analog computing from recycling principle for next circular economy scenario has been studied with an iron oxide-coupled graphite/Fe–Si steel structure which was built using recycled waste materials, such as lead pencil and 3% Si steel (Fe–Si steel) foils. Proximity phenomena, such as disordered structure of iron oxide and magnetostriction-induced conduction, inside graphite lattice resulted in functional properties to advance analog architectures. Thermal oxidation was the synthesis route to produce iron oxide as coating film on Fe–Si steel foil, whose structure properties were validated by Raman spectroscopy where phase formation of hematite, α-Fe2O3, resulted as iron oxide thin-film. Three graphite layers with different compositions were also analyzed by Raman spectroscopy and used for studying electrical conduction in Fe–Si steel/α-Fe2O3/graphite structure from current–voltage plots at room temperature.

Amorphous Silicon TFTs on Steel-Foil Substrates

1996 ◽  
Vol 424 ◽  
Author(s):  
S. D. Theiss ◽  
S. Wagner
Keyword(s):  
Stainless Steel ◽  
Leakage Currents ◽  
Action Current ◽  
Insulating Layer ◽  
Stainless Steel Foil ◽  
Current Voltage ◽  
Stainless Steel Foils ◽  
Steel Foils ◽  
Current Behavior

AbstractWe describe the successful fabrication of device-quality a-Si:H thin-film transistors (TFTs) on stainless-steel foil substrates. These TFTs demonstrate that transistor circuits can be made on a flexible, non-breakable substrate. Such circuits could be used in reflective or emissive displays, and in other applications that require rugged macroelectronic circuits.Two inverted TFT structures have been made, using 200 gim thick stainless steel foils with polished surfaces. In the first structure we used the substrate as the gate and utilized a homemade mask set with very large feature sizes: L = 45 μm; W = 2.5 mm. The second, inverted staggered, structure used a 9500 Å a-SiNx:H passivating/insulating layer deposited on the steel to enable the use of isolated gates. For this structure we used a mask set which is composed of TFTs with much smaller feature sizes. Both TFT structures exhibit transistor action. Current-voltage characterization of the TFTs with the inverted staggered structure shows typical on/off current ratios of 107, leakage currents on the order of 10-12 A, good linear and saturation current behavior, and channel mobilities of 0.5 cm2/V·sec. These characteristics clearly identify the TFTs grown on stainless steel foil as being of device quality.

scholarly journals Surface- and tip-enhanced Raman spectroscopy reveals spin-waves in iron oxide nanoparticles

Nanoscale ◽  
2015 ◽  
Vol 7 (21) ◽  
pp. 9545-9551 ◽  
Author(s):  
Raul D. Rodriguez ◽  
Evgeniya Sheremet ◽  
Tanja Deckert-Gaudig ◽  
Corinne Chaneac ◽  
Michael Hietschold ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Spin Waves ◽  
Oxide Nanoparticles ◽  
Tip Enhanced Raman Spectroscopy

Generating spin-waves by coupling photons with plasmon active tips and iron oxide nanoparticles.

APPLICABILITY OF A NEW SURFACE PREPARATION METHOD FOR STEEL STRUCTURE USING LASER

2016 ◽  
Vol 3 (2) ◽  
Author(s):  
Hiroshi Ogami ◽  
Katashi Fujii ◽  
Yukio Manabe ◽  
Kohei Ota ◽  
Asuo Yonekura
Keyword(s):  
Preparation Method ◽  
Surface Condition ◽  
Surface Preparation ◽  
Steel Structure ◽  
Steel Structures ◽  
Laser Cleaning ◽  
Coating Film ◽  
Test Results ◽  
Corrosion Prevention ◽  
Accelerated Corrosion

Surface preparation is very important in re-painting of steel structures so as to extend the effective term of corrosion prevention. Though grinding or blasting have been widely used to remove rust and old coating film on steel surface, both these methods have difficulty in completion of rust-removal and cause some problems such as dust scattering, noise, etc. In order to solve these problems, this paper presents the laser cleaning method which instantaneously sublimes/evaporates the rust on the surface of steel structure. The authors investigate the effects and the applicability of laser cleaning using the specimens made by accelerated corrosion method. The test results confirmed that the laser cleaning can remove the rust almost much as using sand blast, and the salt on the surface of steel can also be evaporated as good as the rust. Moreover, this method seems can be applied on wet surface condition because the moisture and water on the surface of steel can also be evaporated.

Structural Defects and Critical Electric Field in 3C-SiC

2006 ◽  
Vol 527-529 ◽  
pp. 431-434 ◽  
Author(s):  
Michael A. Capano ◽  
A.R. Smith ◽  
Byeung C. Kim ◽  
E.P. Kvam ◽  
S. Tsoi ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Electric Field ◽  
Lattice Mismatch ◽  
Defect Density ◽  
Chemical Vapor ◽  
Structural Defects ◽  
X Ray ◽  
Transmission Electron ◽  
Current Voltage ◽  
P Type

3C-SiC p-type epilayers were grown to thicknesses of 1.5, 3, 6 and 10 μm on 2.5° off-axis Si(001) substrates by chemical vapor deposition (CVD). Silane and propane were used as precursors. Structural analysis of epilayers was performed using transmission electron microscopy (TEM), high-resolution x-ray diffractometry (HRXRD), and Raman spectroscopy. TEM showed defect densities (stacking faults, twins and dislocations) decreasing with increasing distance from the SiC/Si interface as the lattice mismatch stress is relaxed. This observation was corroborated by a monotonic decrease in HRXRD peak width (FWHM) from 780 arcsecs (1.5 μm thick epilayer) to 350 arcsecs (10 μm thick epilayer). Significant further reduction in x-ray FWHM is possible because the minimum FWHM detected is greater than the theoretical FWHM for SiC (about 12 arcsecs). Raman spectroscopy also indicates that the residual biaxial in-plane strain decreases with increasing epilayer thickness initially, but becomes essentially constant between 6 and 10 μm. Structural defect density shows the most significant reduction in the first 2 μm of growth. Phosphorus implantation was used to generate n+/p junctions for the measurement of the critical electric field in 3C-SiC. Based on current-voltage analyses, the critical electric field in p-type 3C-SiC with a doping of 2x1017 cm-3 is 1.3x106 V/cm.

Thermally Annealed Iron (Oxide) Thin Film on an Alumina Barrier Layer, by XPS

2013 ◽  
Vol 20 (1) ◽  
pp. 55-61 ◽  
Author(s):  
Nitesh Madaan ◽  
Supriya S. Kanyal ◽  
David S. Jensen ◽  
Michael A. Vail ◽  
Andrew E. Dadson ◽  
...  
Keyword(s):  
Thin Film ◽  
Iron Oxide ◽  
Barrier Layer ◽  
Oxide Thin Film

Vibrational properties of nanoparticles iron oxide by Raman spectroscopy

2020 ◽  
pp. 2150125
Author(s):  
T. A. Darziyeva ◽  
E. Sh. Alekperov ◽  
S. H. Jabarov ◽  
M. N. Mirzayev
Keyword(s):  
Crystal Structure ◽  
Raman Spectroscopy ◽  
Iron Oxide ◽  
Gaussian Function ◽  
High Symmetry ◽  
X Ray Diffraction ◽  
Cubic Crystal ◽  
Cubic Symmetry ◽  
Structure Calculations ◽  
Crystal Structure Calculations

The crystal structure and atomic dynamics of Fe3O4 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 [Formula: see text] 50–100 nm dimensional iron oxide corresponds to a high symmetry cubic crystal structure. Calculations have shown that there are four infrared active, five Raman active and seven hyper-Raman active modes in the space group Fd-3m with cubic symmetry. Four of these modes have been observed using Raman spectroscopy: 213, 271, 380 and 591 cm[Formula: see text]. The vibrational modes are interpreted by Gaussian function. It was found that these vibration modes correspond to the vibration of O–Fe–O bonds and iron-oxygen polyhedra.

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