Interference microscopy structure

Huxley, A.F. Niedergerke, R. (1954). Structural changes in muscle contraction. Interference microscopy of living muscle fibres. Namre 173, 971-973. 

In a recent experimental study of the adsorption of methanol in a large crystal of CrAPO by interference microscopy, Lehmann et al. [36] observed that, even at equilibrium, the distribution of sorbate through the crystal is far from uniform. It seems clear that access is controlled lai ely by the defect structure and the growth planes of the crystal. This observation may provide a plausible explanation for the discrepancies observed between different diffusion measurements. The impact of the defect structure... 

One method is based on determining the refractive indexes of the two phases by interference microscopy. However this technique, which gives semi-quantative information, can be applied only if the particles of the dispersed phase are not too small (I, 2). We therefore prepared by anionic polymerization different copolymers of PS-PI containing a fluorescent group like styrene-9-phenyl-10-anthracene (see Structure 7 for structure of fluorescent copolymers). In such a PS-PI blend, the PI phase can be detected first by phase... 

The evidence of interference microscopy nicely correlates with the models of crystallization, which in the case of SAPO-5 favor a pencil-like crystallization core [79,80], while in CrAPO-5 crystalUzation proceeds via the formation of dumbbell-shaped structures [81,82]. In no case coifid a nanoporous material with the desired structure of microscopic, ideal macaronis be identified. The appearing dramatic deviation from an ideal channel structure excludes the appHcation of simple model assiunptions for interpretation of the time evolution of the concentration profiles, hi fact, in [83] the experimentally monitored concentration profiles during... 

Huxley AF, Niedergerke R (1954) Structural changes in muscle during contraction interference microscopy of living muscle fibres. Nature 173 971-973... 

Fig. 29. (a) Ferrierite crystal with a two-dimensional pore structure utilized to determine spatially resolved concentration of methanol, (b) Intercrystalline concentration profiles measured during adsorption hy interference microscopy. Reprinted from 202, cop5rright 2006, with kind permission from American Chemical Society. 

D profiles do not, however, adequately describe 3-D properties, particularly in the ease of anisotropic surfaces. The next step in the application of the wavelength-depen-dent roughness concept will therefore be an extension to 3-D evaluation, as discussed in Section 3.5. Another frequent limitation in applications is related to the limits of lateral and/or vertical resolution and to instrumental artefacts. In comparison to the laser profilometry technique, interference microscopy, AFM and stereo-SEM are able to resolve finer structures and surface features, although — in the case of AFM — problems in ease of contacting envelope may be critical for strongly corrugated surfaces. A comparative study of different teehniques will be published separately. 

Figure 14. Shape, dimensions and transient concentration profiles during uptake of methanol in a ferrierite crystal measured by interference microscopy, (c) shows the actual profiles along the length of the crystal at the mid point, and (e) shows the same profiles normahzed by subtracting the effect of the roof-hke structures. AQ profiles are at the same times (0, 30, 130 and 370 secs). From Kortunov etal [81].

A transverse interferometric technique using interference microscopy is adopted to measure the RIP of the POP because of its high accuracy, high resolution, and ease of sample preparation. Figure 6.1 shows the principle of the technique, which assumes that the fiber has a rotationally symmetric structure around its axis. Here, only the principle of the technique is discussed, as the detailed mathematical explanations are given elsewhere [4, 5]. 

An important application of optical interferometry is in microscopy. Interference microscopy provides a noncontact method for smdies of siuface structure when stylus... 

Principle Optical Coherent Microscopy, using femtocorrelated infrared radiation and interference recording of near-infrared light backscattered from the tissue, allows us to see the internal structure in biological objects with high resolution. 

Li, J. H., Guiltinan, M. J., and Thompson, D. B. 2006. The use of laser differential interference contrast microscopy for the characterization of starch granule ring structure. Starch-Starke 58 1-5. 

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