Secondary extinction correction used in a novel method for improved XRD characterizations of textured materials: The case of thin films

ABSTRACTWe report a novel method to obtain stable second order nonlinear optical (NLO) properties in polymeric thin films. Photocross-linking between the NLO active molecules and a photoreactive polymer is achieved by UV irradiation subsequent to poling. The thin film exhibits a nonlinear coefficient d33of 16.5 pm/V at a doping level of 20% by weight of NLO active molecules and possesses quite stable second order nonlinear optical properties

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A novel method for the preparation of NH3 sensors based on ZnO-In thin films

Sensors and Actuators B Chemical ◽

10.1016/0925-4005(95)85128-3 ◽

1995 ◽

Vol 25 (1-3) ◽

pp. 588-590 ◽

Cited By ~ 121

Author(s):

G. Sberveglieri ◽

S. Groppelli ◽

P. Nelli ◽

A. Tintinelli ◽

G. Giunta

Keyword(s):

Thin Films ◽

Novel Method

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Influence of Electron-Beam Annealing Duration on MgB2 Film Superconductivity

Materials Science Forum ◽

10.4028/www.scientific.net/msf.745-746.255 ◽

2013 ◽

Vol 745-746 ◽

pp. 255-260

Author(s):

Xiang Dong Kong ◽

Qian Dai ◽

Han Li ◽

Qing Rong Feng ◽

Ming Zhang Chu ◽

...

Keyword(s):

Thin Films ◽

Electron Beam ◽

High Efficiency ◽

Beam Current ◽

Annealing Duration ◽

Zero Field ◽

Superconducting Properties ◽

Dense Structure ◽

Novel Method ◽

The Relationship

A novel method to fabricate Magnesium diboride ( MgB2) film by electron beam annealing was presented. The MgB2 thin films could be prepared in a second or sub-second without any toxic diborane gas, extra Mg vapor or argon gas. The method has the advantages of short formation time and high efficiency. Based on this, the relationship between MgB2 conductivity and electron beam annealing duration was investigated experimentally with an accelerating voltage of 40 × 103 V, a beam current of 3×103 A and different annealing durations of 0.1796s, 1860s, 0.2108s, 0.2200s and 0.2332s. The experimental results showed the MgB2 film with 0.2200s has the highest Tconset , the most dense structure and the strongest diamagnetic signal. Its zero-field Jc at 5 K was 5.0 × 106 A/cm2. Also the variation of the film superconducting properties with the annealing duration was found, it will provide an important reference for the preparation of high-quality MgB2 thin films.

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Determination of Thickness of Multiple Layer Thin Films by X-ray Diffraction Technique

Advances in X-ray Analysis ◽

10.1154/s0376030800023065 ◽

1995 ◽

Vol 39 ◽

pp. 637-643

Author(s):

J. Chaudhuri ◽

F. Hashmi

Keyword(s):

Thin Films ◽

Diffraction Theory ◽

Scanning Electron Microscopy Data ◽

X Ray Diffraction ◽

X Ray ◽

Multiple Layer ◽

Crystal Model ◽

Microscopy Data ◽

Secondary Extinction

In this study, the equations based on x-ray diffraction theory were developed to determine the thickness of multiple layer thin films. The kinematical expression of the integrated reflected intensity from the substrate and films was corrected for the primary and secondary extinction effects assuming a mosaic crystal model. As an example of the application of the method, thicknesses of a double heterostructure system, namely AlAs/AIGaAs/GaAs, were determined. Good agreement was obtained between the results from the x-ray measurement and scanning electron microscopy data demonstrating high precision of this technique.

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Characterization of pulsed laser deposited MoS2 by transmission electron microscopy

Journal of Materials Research ◽

10.1557/jmr.1993.2933 ◽

1993 ◽

Vol 8 (11) ◽

pp. 2933-2941 ◽

Cited By ~ 11

Author(s):

S.D. Walek ◽

M.S. Donley ◽

J.S. Zabinski ◽

V.J. Dyhouse

Keyword(s):

Electron Microscopy ◽

Thin Films ◽

Transmission Electron Microscopy ◽

Solid Phase ◽

Analytical Electron Microscopy ◽

Pulsed Laser ◽

Cross Sectional ◽

Aerospace Applications ◽

Transmission Electron ◽

Novel Method

Molybdenum disulfide is a technologically important solid phase lubricant for vacuum and aerospace applications. Pulsed laser deposition of MoS2 is a novel method for producing fully dense, stoichiometric thin films and is a promising technique for controlling the crystallographic orientation of the films. Transmission electron microscopy (TEM) of self-supporting thin films and cross-sectional TEM samples was used to study the crystallography and microstructure of pulsed laser deposited films of MoS2. Films deposited at room temperature were found to be amorphous. Films deposited at 300 °C were nanocrystalline and had the basal planes oriented predominately parallel to the substrate within the first 12–15 nm of the substrate with an abrupt upturn into a perpendicular (edge) orientation farther from the substrate. Spherically shaped particles incorporated in the films from the PLD process were found to be single crystalline, randomly oriented, and less than about 0.1 μm in diameter. A few of these particles, observed in cross section, had flattened bottoms, indicating that they were molten when they arrived at the surface of the growing film. Analytical electron microscopy (AEM) was used to study the chemistry of the films. The x-ray microanalysis results showed that the films have the stoichiometry of cleaved single crystal MoS2 standards.

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