Germanium plate

Fourier transform infrared (FTIR)-attenuated total reflection (ATR) spectra have been measured for LB films of stearic acid deposited on a germanium plate with... 

Germanium plates have been employed as OTEs in the infrared region, although films have not been examined due to the high resistance. The surface also exhibits a limited usable potential range [88]. The electrochemical properties of germanium are substantially improved by vapor-depositing a thin carbon film on the surface [76]. 

Interfacial Ca(OH)2. After either the germanium plate was dipped through the interface of the CaCl2 solution, or the CaCl2 solution was deposited onto the germanium plate, the ATR IR spectra showed three peaks at wavelengths of 2.90, 4.65, and 6.15-/xm. The peak at 4.65 /xm, which was of uncertain origin, had the smallest intensity. Since in the... 

Figure 7. IR spectra (at 2.90 fim, 4.65 fim and 6.15fi m) of films collected on germanium plate from aqueous phase at 25° C, pH 5.6. Upper panel 0.075M CaCU at different pH values without DPL films. Lower panel DPL films spread on either 0.I5M NaCI or 0.0I0M CaCU. The solution, with or without the lipid film, was left to stand at room temperature for a given time. The germanium plate then was dipped through the interface four times, dried under a stream of N gas, and examined in the ATR accessory (for details, see...

Figure 8. IR spectra (at 8 to 10 pm) of DPL films either deposited directly (Curve 1) or collected from the interface onto germanium plate (other curves). Curve 2, DPL on 0.15M NaCl Curve 3, DPL on 0.001M CaCU Curve 4, DPL on O.OiOM CaCU Curve 5, DPL on 0.075M CaCU and Curve 6, interface of 0.075M without DPL film. Spectroscopy technique as in Figure 7.

Figure 13.7a shows a spechal image of the 5CB sample inserted between two germanium plates covered by a rubbed poly(vinyl alcohol) (PVA) alignment layer. 

The x-ray diffraction patterns were obtained using the URS-50IM diffractometer and the monochromatic Cu-K radiation. The monochromator consisted of a bent germanium plate, which was d — 0.17 mm thick. The plane of the plate was oriented along (111) and its radius of curvature was R = 330 mm. The monochromator was attached rigidly to the casing of the x-ray tube. 

The intensities of the x-ray diffraction peaks were determined using a diffractometer with a monochromatic Cu K source. The intensities were measured with an NaI Tl scintillation counter coupled to a discriminator. The copper radiation was made monochromatic by an elastically bent sii le-crystal germanium plate cut along the (111) plane [2]. 

The integrated intensities of the reflections were measured by means of a URS—50IM diffractometer, an NaI Tl scintillation coimter, and an amplitude analyzer. We used CXi radiation made monochromatic by means of a bent single-crystal germanium plate cut along the (111) plane. 

Another approach to obtain a transmission funchon similar to that of a monolayer is to use a gap of A,/2 between two flat and parallel germanium plates this requires a combinahon ri2 = 4, rii = 1, o = 4, for example. At normal incidence this arrangement has a transmission funchon idenhcal to the case 2 = l. i =4, o = 1. 

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