Superlattice multilayers

Figure 17.3. Schematic description of the electrodeposition cell for the production of superlattice multilayers. (From M. Schlesinger, Chapter 14 in Electrochemical Technology, T. Osaka, ed., with permission from Kodansha Ltd.)...

Figure 17.4. Hardness data for elec-trochemically grown Co/Ni superlattice multilayers as a function of individual layer thickness. (From Ref. 6a, with permission from the Electrochemical Society.)...

It should be pointed out also that at least in principle, higher-order n> 1) satellites can be expected to be evident in superlattice multilayer x-ray spectra when the... 

It should be pointed out also that, at least in principle, higher-order (n > 1) satellites can be expected to be evident in superlattice multilayer X-ray spectra when the boundary layer between the component metals is sharp (i.e., the transition between layers is abrupt). This is the consequence of the satellites being the Fourier transform of the element distribution as one passes from one layer to the other. 

Figure 17.6. An oversimplified model of the magnetoresistance in superlattice multilayers. (By permission, see Figure 17.3.)...

For pSi superlattice multilayers of high quality, it is also possible to correlate the observed fringes in the low-order satellite peaks with the total number of periods in the pSi film (Buttard et al. 1998). This is viewed as strong evidence of lateral homogeneity of the entire superlattice film thickness overall. 

Loaded/infiltrated porous Si 4 Strain analysis 3 Superlattice multilayers 4 X-ray diffraction (XRD) 1 X-ray powder diffractometer 1... 

A new chapter in the uses of semiconductors arrived with a theoretical paper by two physicists working at IBM s research laboratory in New York State, L. Esaki (a Japanese immigrant who has since returned to Japan) and R. Tsu (Esaki and Tsu 1970). They predicted that in a fine multilayer structure of two distinct semiconductors (or of a semiconductor and an insulator) tunnelling between quantum wells becomes important and a superlattice with minibands and mini (energy) gaps is formed. Three years later, Esaki and Tsu proved their concept experimentally. Another name used for such a superlattice is confined heterostructure . This concept was to prove so fruitful in the emerging field of optoelectronics (the merging of optics with electronics) that a Nobel Prize followed in due course. The central application of these superlattices eventually turned out to be a tunable laser. 

Fig. 4.5 Superlattices (superstructures) and multilayers are systems composed of alternating layers of, say, phases A and B with a specified AB bdayer thickness, which is called the modulation wavelength (A), or period...

Switzer JA (2001) Electrodeposition of superlattices and multilayers. In Hodes G (ed) Electrochemistry of Nanostructures, Wdey-VCH, Weinheim... 

Fig. 9.3.5 (A) Scanning electron microscopy on concentrated solution of 4.5-nm silver particles ([(Ag) ] = 4 X I0 3 M). Large aggregates on silver multilayers are present. (B) Absorption spectra of free 4.5-nm silver nanoparticles dispersed in hexane before (solid line) leaving a drop on the support, after washing the support with hexane (dashed line), and deposition on the support forming a 3D superlattice (a). ([(Ag) ] = 4 X I0 3 M).

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