INDEX silicon

Specific retention volumes have been reported373 for some tetraalkylsilanes mainly containing branched alkyl groups374. A quantity called the silicon index (ISi) has been reported for tetramethyl, tetraethyl and tetrapropyl silanes. 

E. Pohjala and co-workers. Phosphorus Sulfur Silicon, 76, 159 (1993) The Merck Index, 11th ed., Merck and Co., Rahway, N.J., 1989. 

Antireflection coatings are used over the silicon surface which, without the coating, reflects ca 35% of incident sunlight. A typical coating consists of a single layer of a transparent dielectric material with a refractive index of ca 2, which is between the index of siUcon and ait or cover material. Materials such as titanium dioxide, tantalum pentoxide, Ta20, or siUcon nitride, Si N, ca 0.08-p.m thick are common. The coating and a physically textured... 

This polymer has a good strength for a flexible silicone polymer coupled with the good heat resistance which may be expected from its components, together with an outstanding value for the limiting oxygen index of 48. 

Fig. 7.29 Temperature to give a scaling index of 100 versus silicon content (10-89-13-14% Cr)...

The index of refraction and amount of light reflected at an interface with air tiair 1.00) is given in Table 2. Note that the index of refraction of silicon varies significantly over the 0.32-1.1 /xm range, as shown in Fig. 10 n 4... 

Table 2. Reflection of light at an interface Index of refraction and percentage of energy reflected at an air-medium interface for glass, silicon and HgCdTe.

In comparison to infrared detectors, it is much more difficult for silicon-based optical detectors to achieve high QE over a wide bandpass. The main challenge is the tremendous variation of absorption depth shown in Fig. 8. In addition, the index of refraction varies significantly for A = 0.32-1.1 m, as shown in Fig. 10, making it difficult to optimize anti-reflection coatings for broad bandpass. 

Figure 10. Index of refraction of silicon. The factor of 2 difference of the index of refraction for 0.32-1.1 p,m makes broad bandpass AR coatings difficult to optimize.

The blends, irrespective of the concentration of fluororubber, show surface energy lower than neat rubbers. This is attributed to the migration of silicone mbber to the surface. The presence of silicone rubber on the surface of the blends also contributes to their lower limited oxygen index compared to that of fluoroelastomers. 

Flexible foams with oxygen index values of 40-53 were also prepared by the same authors from blends of copolymer IV and a silicone elastomer, (a phenyl vinyl polydimethylsiloxane) [592]. 

The refractive index of amorphous silicon is. within certain limits, a good measure for the density of the material. If we may consider the material to consist of a tightly bonded structure containing voids, the density of the material follows from the void fraction. This fraction / can be computed from the relative dielectric constant e. Assuming that the voids have a spherical shape, / is given by Bruggeman [61] ... 

Fig. 2.9.10 Maps of the temperature and of the experimental data. The right-hand column convection flow velocity in a convection cell in refers to numerical simulations and is marked Rayleigh-Benard configuration (compare with with an index 2. The plots in the first row, (al) Figure 2.9.9). The medium consisted of a and (a2), are temperature maps. All other random-site percolation object of porosity maps refer to flow velocities induced by p = 0.7 filled with ethylene glycol (temperature thermal convection velocity components vx maps) or silicon oil (velocity maps). The left- (bl) and (b2) and vy (cl) and (c2), and the hand column marked with an index 1 represents velocity magnitude (dl) and (d2).

Figure 3. Cross section of the two basic geometries for microresonators with port waveguides (a) vertical arrangement (h) lateral arrangement (the dashed region indicates the analyte layer). The structure in this case is fabricated in silicon-based technology, with the index of refraction of Si02 and Si3N4 1.45 and 2.0 respectively.

GeneSpring Silicon Genetics www.sihcongenetics.com/cgi/SiG.cgi/ company/index.smf... 

Figure 2. Oxygen index of silicone/bisphenol-A polycarbonate block polymers of varying silicone block content.

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