Controlling Aspect Ratio of Copper Group Nanowire Arrays by Electrochemical Deposition in the Nanopores of AAO

2011 ◽  
Vol 335-336 ◽  
pp. 429-432 ◽  
Author(s):  
Xiu Yu Sun ◽  
Fa Qiang Xu
Keyword(s):  
Aspect Ratio ◽  
Nanowire Arrays ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
X Ray ◽  
Anodic Aluminum ◽  
Au Nanowire ◽  
The Face ◽  
Face Centered ◽  
Xrd Patterns

Highly ordered Cu, Ag and Au nanowire arrays with high aspect ratio and highly dense self-supporting nanowire patterns of copper group were successfully prepared using cyclic voltammetry with the assistance of anodic aluminum oxide (AAO) template. The X-ray diffraction (XRD) patterns of the metal nanowries were indexed to the face-centered cubic structure. The field emission scanning electron microscope (FE-SEM) results demonstrated that the length of nanowire could be controlled by changing the electrodepositon conditions. The aspect ratio of nanowire arrays can be tuned.

Formation of face-centered cubic titanium on a Ni single crystal and in Ni/Ti multilayers

1994 ◽  
Vol 9 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Alan F. Jankowski ◽  
Mark A. Wall
Keyword(s):  
Structural Characteristics ◽  
Single Layer ◽  
High Resolution Electron Microscopy ◽  
Cubic Phase ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
X Ray ◽  
Resolution Electron ◽  
The Face ◽  
Face Centered

The artificial layering of metals can change both physical and structural characteristics from the bulk. The stabilization of polymorphic metallic phases can occur on a dimensional scale that ranges from single overgrowth layers to repetitive layering at the nanoscale. The sputter deposition of crystalline titanium on nickel, as both a single layer and in multilayer form, has produced a face-centered cubic phase of titanium. The atomic structure of the face-centered cubic titanium phase is examined using high resolution electron microscopy in combination with electron and x-ray diffraction.

Highly Oriented Co Soft Magnetic Films on Si Substrates

1999 ◽  
Vol 562 ◽  
Author(s):  
Heng Gong ◽  
Wei Yang ◽  
Maithri Rao ◽  
David E. Laughlin ◽  
David N. Lambeth
Keyword(s):  
Magnetic Properties ◽  
Magnetic Films ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
Orientation Relationships ◽  
Soft Magnetic ◽  
X Ray ◽  
Si Substrates ◽  
The Face ◽  
Face Centered

ABSTRACTThin Co and Co based alloy films with the face centered cubic (FCC) structure have been epitaxially grown on single crystal Si wafers by sputter deposition. Epitaxial orientation relationships have been determined by x-ray diffraction, x-ray pole figure scans and TEM. Magnetic properties have been characterized using vibrating sampling magnetometer (VSM), torque magnetometer and BH loop tracer. Soft magnetic properties have been observed for the pure Co films.

A partly disordered 2 × 2 × 2 – superstructure of γ-brass related phase in Mn–Ni–Zn system

2021 ◽  
Vol 236 (3-4) ◽  
pp. 71-80
Author(s):  
Sivaprasad Ghanta ◽  
Anustoop Das ◽  
Rajat Kamboj ◽  
Partha P. Jana
Keyword(s):  
Crystal Structure ◽  
High Symmetry ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lattice Constants ◽  
Cubic Lattice ◽  
The Face ◽  
Face Centered ◽  
Related Phase

Abstract The T phase in the Mn–Ni–Zn system was obtained as a product of high-temperature solid-state syntheses from the loaded composition of MnxNi2−xZn11 (x = 0.2–1.5)/MnxNi15.38−xZn84.62 (x = 1.54–11.54). The crystal structure of the T phase has been explored by means of X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS). The structures were solved in the face-centered cubic space group F 4 ‾ 3 m $F‾{4}3m$ (216) and contain 409–410 atoms/unit cell. The lattice constants were found to be a = 18.1727(2) and 18.1954(1) Å for crystals C1 and C2, respectively. The crystal structure denoted the T phase is a (2aγ)3-superstructure of the ordinary cubic γ-brass-type phase. The phase is isostructural to (Fe, Ni)Zn6.5. A “cluster” description has been used to visualize the crystal structure of the title phase. The structures have been constructed by the five distinct clusters and they are situated about the high symmetry sites of the face-centered cubic lattice. The T phase is stabilized at a valance electron concentration of 1.78, which is slightly higher than those expected for typical γ-brass Hume‐Rothery compounds.

Preparation of AgBr Nanowire Arrays in Porous Anodic Aluminium Oxide Template by Paired Cell Deposition

2013 ◽  
Vol 539 ◽  
pp. 255-258
Author(s):  
Miao Miao Cui ◽  
Xiu Chun Yang ◽  
Jun Wei Hou
Keyword(s):  
Anodic Aluminum Oxide ◽  
Average Diameter ◽  
Anodic Aluminum Oxide Template ◽  
Nanowire Arrays ◽  
X Ray Diffraction ◽  
X Ray ◽  
Anodic Aluminum ◽  
Anodization Process ◽  
Face Centered ◽  
Paired Cell

Firstly, porous anodic aluminum oxide template was prepared by a two-step anodization process, then AgBr nanowire arrays were successfully synthesized by paired cell deposition. X-ray diffraction (XRD) indicates that the as-synthesized samples are composed of face-centered AgBr. Field-emission scanning electron microscopy (FESEM) shows that the average diameter of the nanowire arrays is about 70nm.

scholarly journals Structural, Thermal, Optical, Electrical, and Adhesive Characteristics of FePdB Thin Films

2015 ◽  
Vol 2015 ◽  
pp. 1-5
Author(s):  
Yuan-Tsung Chen
Keyword(s):  
Thin Films ◽  
Activation Energy ◽  
Room Temperature ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
Dc Magnetron Sputtering ◽  
Adhesive Properties ◽  
X Ray ◽  
Face Centered ◽  
Xrd Patterns

To study the structural, thermal, electrical, optical, and adhesive properties of magnetic FePdB thin films, 25–200-Å-thick Fe40Pd40B20and Fe60Pd20B20films were deposited on a glass substrate by direct current (DC) magnetron sputtering at room temperature (RT). X-ray diffraction (XRD) patterns indicated that the 25–75-Å-thick Fe40Pd40B20and Fe60Pd20B20films were amorphous, whereas the 100–200-Å-thick Fe40Pd40B20and Fe60Pd20B20films were crystalline, with a face-centered cubic (FCC) FePd (111) textured structure. The activation energy of the Fe40Pd40B20and Fe60Pd20B20thin films decreased as thickness was increased. The 25-Å-thick Fe40Pd40B20film exhibited the highest resistivity, whereas the 200-Å-thick Fe60Pd20B20film exhibited the lowest resistivity. Increasing the thickness and crystallization reduced transmission. The Fe40Pd40B20thin films exhibited higher surface energy and stronger adhesion than did Fe60Pd20B20thin films.

Thermal Expansions of the Beta and Gamma Phases in a Co–Ni–Fe Superalloy Determined by X-ray Diffraction

2000 ◽  
Vol 15 (8) ◽  
pp. 1719-1723 ◽  
Author(s):  
M. S. Seehra ◽  
C. Cionca ◽  
A. Manivannan
Keyword(s):  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
Relative Temperature ◽  
X Ray ◽  
Β Phase ◽  
Abrupt Jump ◽  
Initial Magnetic Susceptibility ◽  
Face Centered ◽  
Two Phases ◽  
Xrd Patterns

Commercially useful multiphase alloy Inconel 783 is made up of Ni(28%), Fe(25%), and Co(35%) with smaller amounts of Cr, Al, Nb, Mo, Ti, C, and Si. In this work, relative temperature variations of the lattice constants a(T)/a0 of the gamma (face-centered-cubic) and beta (body-centered-cubic) phases of this alloy are determined from 97 to 773 K using analyses of their x-ray diffraction (XRD) patterns. Plots of a(T)/a0 for the two phases vary from 1.0 at 97 K to 1.012 at 773 K and show that (i) for T = 500 K, thermal expansion of the β phase is larger than that of the = phase; and (ii) an abrupt jump is observed near 300 K. The appearance of new lines above 700 K in XRD representing Co2CrO4 and CoCr2O4 is interpreted in terms of the oxidation of the γ phase, whereas the β phase is oxidation resistant. The anomalous change in a(T)/a0, observed near 300 K and accompanied by a similar change in the temperature variation of the initial magnetic susceptibility, is not well understood. A brief discussion on the implications of these results is presented.

Epitaxial Influence of Textured Conducting Metal Oxide Templates on Electrodeposited Ag(Ag3O4)2N03

1992 ◽  
Vol 280 ◽  
Author(s):  
Bryan E. Breyfogle ◽  
Richard J. Phillips
Keyword(s):  
Lattice Mismatch ◽  
Substrate Surface ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
X Ray ◽  
Conducting Oxides ◽  
430 Stainless Steel ◽  
The Face ◽  
Face Centered ◽  
Different Thickness

ABSTRACTThe conducting oxysalt Ag(Ag3O4)2NO3 has been electrodeposited onto highly oriented conducting oxides of Tl2 03 and Pb0.8Tl0.2O1.9. T12O3 was grown in a [100] texture while the Pb0.8Tl0.2O1.9 was grown with two different thickness-dependent textures of [110] and [210]. The orientation of the Ag(Ag3O4)2NO3 crystals with respect to the substrate surface was determined by x-ray diffraction. The face-centered-cubic Ag(Ag3O4)2N03 crystals deposited on body-centered-cubic T12 03 and face-centered-cubic Pb0.8Tl0.2O1.9 followed the orientation of these prelayers. However, Ag(Ag3O4)2N03 which was electrodeposited onto polycrystalline 430 stainless steel had a nearly random orientation. The lattice mismatch is 6.6% between T12 03 and Ag(Ag3O4)2N03, and it is 7.8% between Ag(Ag3O4)2N03 and the doubled unit cell of Pb0.8Tl0.2Ol.9.

Stabilization of Thick Fcc Cobalt Layers by One Monolayer of Manganese in Co/Mn Superlattices

1998 ◽  
Vol 528 ◽  
Author(s):  
V. Pierron-Bohnes ◽  
A. Michel ◽  
J.P. Jay ◽  
P. Panissod
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Buffer Layer ◽  
Structural Properties ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Face ◽  
Face Centered ◽  
Fcc Phase

AbstractEpitaxial Co/Mn superlattices (0.6 to 4.8 nm thick Co) have been grown on (0002) hcp Ru buffer layer on mica substrates. The face centered cubic (fcc) phase of cobalt is stabilized by the very thin manganese layer. The structural properties of these layers have been studied through x ray diffraction and nuclear magnetic resonance.

Stacking Faults in a High Nitrogen Face-Centered-Cubic Phase Formed on Nitrogen-Modified Austenitic Stainless Steel

2008 ◽  
Vol 373-374 ◽  
pp. 318-321
Author(s):  
J. Liang ◽  
M.K. Lei
Keyword(s):  
Stainless Steel ◽  
Plasma Source ◽  
Peak Shift ◽  
Cubic Phase ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
High Nitrogen ◽  
X Ray ◽  
Peak Asymmetry ◽  
Face Centered

Effects of stacking faults in a high nitrogen face-centered-cubic phase (γΝ) formed on plasma source ion nitrided 1Cr18Ni9Ti (18-8 type) austenitic stainless steel on peak shift and peak asymmetry of x-ray diffraction were investigated based on Warren’s theory and Wagner’s method, respectively. The peak shift from peak position of the γΝ phase is ascribed to the deformation faults density α, while the peak asymmetry of the γΝ phase is characterized by deviation of the center of gravity of a peak from the peak maximum (Δ C.G.) due to the twin faults density β. The calculated peak positions of x-ray diffraction patterns are consistent with that measured for plasma source ion nitrided 1Cr18Ni9Ti stainless steel.

Theoretical and experimental study of the gradient properties and the resulting local crystalline structure and orientation in magnetron-sputtered CrAlN coatings with lateral composition and thickness gradient

2017 ◽  
Vol 50 (4) ◽  
pp. 1000-1010
Author(s):  
Bärbel Krause ◽  
Michael Stüber ◽  
Anna Zimina ◽  
Ralph Steininger ◽  
Mareike Trappen ◽  
...  
Keyword(s):  
Target Surface ◽  
Sample Surface ◽  
Composition Gradient ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
X Ray ◽  
Al Content ◽  
Spatially Resolved ◽  
Composition Profiles ◽  
Face Centered

Cr–Al–N coatings with a lateral composition gradient were deposited from two segmented Cr/Al targets with different segment size, thus covering the Al content range 0.22 ≲ c ≲ 0.87 and a thickness range from several hundred nanometres to several micrometres. The two-dimensional thickness and composition profiles were determined nondestructively from X-ray fluorescence maps. The results were reproduced by simulations of the flux distribution on the sample surface, combiningTRIDYNsimulations of the reactive sputter process at the target surface andSIMTRAsimulations of the subsequent transport through the gas phase. The phase formation was studied by spatially resolved X-ray diffraction and X-ray absorption spectroscopy at the Cr Kedge. Forc ≲ 0.69, a single-phase solid solution face-centered cubic (f.c.c.) (Cr,Al)N phase was found, and for 0.69 ≲ c ≲ 0.87 coexisting f.c.c. (Cr,Al)N and hexagonal close packed (h.c.p.) (Cr,Al)N phases were observed. The biaxial texture formation in nearly the entire composition range indicates a zone T growth. Four, mainly composition-dependent, texture regions were identified. All observed textures are closely related to textures reported for the h.c.p. AlN and f.c.c. CrN parent phases. Forc ≳ 0.69, a strong thickness dependence of the textures was observed. The measurements reveal an orientation relation between different f.c.c. and h.c.p. textures, indicating that local epitaxy might play a role in the structure formation.

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