N-type CdSe films with thicknesses of 470-630 nm were grown on (001) and 2"-miscut GaAs wafers by ArF (193 nm) pulsed laser ablation of stoichiometric CdSe targets at platen temperatures (Tp) of 250425°C in vacuum and ambient Ar gas. Film-substrate interdiffusion was studied with Auger depth profiling, as well as energy dispersive x-ray fluorescent spectroscopy (EDS). Both techniques showed tha...

In this work, different dielectric caps were deposited on the GaAs/AlGaAs quantum well ~QW! structures followed by rapid thermal annealing to generate different degrees of interdiffusion. Deposition of a layer of GaxOy on top of these dielectric caps resulted in significant suppression of interdiffusion. In these samples, it was found that although the deposition of GaxOy and subsequent anneali...

A 0.5 μm thick layer of rhodium was deposited on the CMSX 4 superalloy by the electroplating method. The rhodium-coated superalloy was hafnized and aluminized or only aluminized using the Chemical vapour deposition method. A comparison was made of the microstructure, phase composition, and oxidation resistance of three aluminide coatings: nonmodified (a), rhodium-modified (b), and rhodiumand ha...

The interdiffusion of GaxIn12xN0.04As0.96 /GaAs single quantum well ~QW! structure with well width of 6 nm is studied theoretically. The as-grown Ga concentration in the QW is chosen to be 0.7 and 0.6 for the operation wavelengths of 1.3 and 1.55 mm, respectively. We studied the effects of interdiffusion on the in-plane strain, confinement potential, and subband energy levels of the QW using Fi...

in this research, effect of bicomponent mixed surfactant was studied on drop interface coalescence phenomenon in ambient temperature. first basic chemical system was water and toluene and 0.01 gr of sodium dodecyle sulfate (sds) and the second basic system was water and toluene and 0.01 gr of cethyl trimethy amonium bromide (ctab). various weight fractions of second surfactant including 2-hepta...

The effect of polystyrene (PS) matrix relaxation on interdiffusion at a PS and poly(viny1 methyl ether) (PVME) interface was investigated with attenuated total internal reflectance infrared spectroscopy (ATR-FTIR) at 105 and 85 "C, corresponding to 5 "C above and 15 "C below the Tg of PS, respectively. Monodisperse PS samples with M, of 3.0 x lo6 and 1.05 x lo5 were used to simulate relaxation ...

Tackifying resins (TR) are often used to improve the adhesive properties of waterborne pressure-sensitive adhesives (PSAs) derived from latex dispersions. There is a large gap in the understanding of how, and to what extent, the film formation mechanism of PSAs is altered by the addition of TR. Herein, magnetic resonance profiling experiments show that the addition of TR to an acrylic latex cre...

A self-consistent model for the band structure and optical gain spectra in interdiffused GaxIn1−xN0.04As0.96/ GaAs single quantum wells are studied theoretically using Fick’s Law and the Fermi Golden Rule. Due to quantumwell interdiffusion, the peak gain and its peak vary with the annealing time. Our results show that the interdiffusion technique can be used to tune the operation wavelength for...

A technique for measuring interdiffusion in multilayer materials during rapid heating using X-ray reflectivity is described. In this technique the sample is bent to achieve a range of incident angles simultaneously, and the scattered intensity is recorded on a fast high-dynamic-range mixed-mode pixel array detector. Heating of the multilayer is achieved by electrical resistive heating of the si...

MAP DE87 006975 Repository-oriented leaching experiments involving Savannah River Laboratory (SRL) 165 type glass under a 7-radiation field (1 * 0.2 x 104 R/h) have been performed by the Nevada Nuclear Waste Storage Investigations (NNWSI) project. In this communication, we discuss glass surface analyses obtained by SEM, nuclear resonance profiling, and SIMS together with leachate solution data ...