Scanning electron microscopy pattern

Scanning Electron Microscopy. Pattern replication from the master to the PDMS and POP (VP8770 variant) stamps was investigated (besides AFM) by SEM. The examinations concentrated on the nanometer range patterns, because this is the range where the occurrence of replica-... 

X-ray diffraction patterns were recorded on a Philips PW1820 diffractometer with Cu-Ka radiation (X = 0.154 nm). The collected sample was indexed very well as cubic a-Mn203 bixbyite (JCPDS 41-1442, la-3, a = 0.941 nm) (Fig. 1). The morphologies were visualized by scanning electron microscopy (SEM) (Fig. 1). The abundant well-defined hexagonal-like plates with the sizes from several hundred nanometers to a few micrometers were formed during hydrothermal treatment, which kept initial shape after 700 °C-calcination (Fig. 1). The hexagonal plates are about 50 nm thick with smooth surfaces. 

Nanosized anatase (< 10 nm) and brookite ( 70 run) particles have been successfully synthesized via sonication and hydrothermal methods. Figure 5.1 shows the powder XRD patterns of as-synthesized anatase and brookite nanoparticles. The particle sizes were characterized by XRD and scanning electron microscopy (SEM) (Fig. 5.2). 

In scanning electron microscopy (SEM), a finely focussed electron beam probe moves from one point on the specimen to the next to form a raster pattern, just as in television imaging. The intensity of scattered or secondary electrons is continuously... 

With improvements in the preparation of more active HDS catalysts, MoS2 crystallites became smaller, and traditional physical techniques for characterization such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) became limited. In fact, today s best catalysts do not exhibit XRD patterns, and the active catalyst particles can no longer be observed directly by TEM. Thus, new techniques were required to provide structural information about Co(Ni)-Mo-S catalysts. As modern surface science characterization procedures evolved, they were immediately applied to the study of CoMoSx-based... 

An interesting feature was observed during the study of surfactant adsorption onto LDHs, which was shown previously for the study of SDS adsorption onto an Mg-Al-CCVLDH [10, 11]. Nanoribbon-like image patterns, observed by scanning electron microscopy (SEM), were identified in the adsorbed material obtained at the isotherm plateau. 

Fig. 12.7. Scanning electron microscopy reveals details of hair fibers. Normal hairs from an adult C57BL/6J examined as a whole mount (A) illustrates density of mouse hairs and the nature of the normal skin surface. Manually plucked hairs illustrate the structural differences between some of the hair fiber types (B). Higher magnification of boxed area in B reveals the regular cuticular scale patterns on these hair fibers (C). These approaches illustrate details of hair fiber structure and density (80).

Bottoms, E., Wyatt, E., and Comaish, S. (1972). Progressive changes in cuticular pattern along the shafts of human hair as seen by scanning electron microscopy. Brit. J. Dermatol. 86, 379-384. 

The second point is that the S-shapes of many of the release curves in this study indicate a biphasic pattern of drug release. This was also observed by Wakiyama et al (7-91. who used scanning electron microscopy to demonstrate that the second rise in the release rate was due to disintegration of the polylactide microspheres. 

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