Scanning electron micrograph, surface

FIGURE 9 Scanning electron micrograph (surface view) of PBLG film sample 38-5-2 mol. wt. = 248 kD field = 10.4 kV/cm original magnification x2400 field direction. ... 

Figure C2.11.5. Scanning electron micrographs showing the microstmcture of an alumina ceramic spark-plug body (a) fracture surface and (b) polished and thennally etched cross section.

Fig. 11. Scanning electron micrograph showing the intersection of primary shear bands with the glassy ribbon surface produced by simple bending.

Fig. 27. Scanning electron micrograph (a) and cross-sectional comparison (b) of screen and depth filters both having a nominal particulate cut-off of 0.4 flm. The screen filter (a Nuclepore radiation track membrane) captures particulates at the surface. The phase-inversion ceUulosic membrane traps the...

Iridium Oxide. Iridium dioxide [12030 9-8] coatings, typically used in combination with valve metal oxides, are quite similar in stmcture to those of mthenium dioxide coatings. X-ray diffraction shows the mtile crystal stmcture of the iridium dioxide scanning electron micrographs show the micro-cracked surface typical of these thermally prepared oxide coatings. 

The processes for manufacturing microporous membranes can be broadly divided into wet processes and dry processes. Both processes usually employ one or more orientation steps to impart porosity and/or increase tensile strength. Figure 2 shows scanning electron micrographs of surfaces of separators made by each process. 

Figure 2. Scanning electron micrographs of surfaces of microporous membranes made by wet and dry processes. (a) Setela microporous membrane (net process) (b) Celgard microporous membrane (dry process).

The infrared spectra demonstrate that there is a strong interaction between CR and the PS segment of SBS and between SBS and BR. Scanning electron micrographs of the fracture surfaces further support the conclusion. The fracture surface of 70 30 BR/CR shows layer-shaped morphology and 30 70 blends show hillock-shaped protmsions. Addition of 5% SBS reduces the particle size, makes the particles more spherical, and enhances uniform distribution. This provides further evidence of the compatibilizing effect of SBS. 

The next two examples illustrate more complex surface reaction chemistry that brings about the covalent immobilization of bioactive species such as enzymes and catecholamines. Poly [bis (phenoxy)-phosphazene] (compound 1 ) can be used to coat particles of porous alumina with a high-surface-area film of the polymer (23). A scanning electron micrograph of the surface of a coated particle is shown in Fig. 3. The polymer surface is then nitrated and the arylnitro groups reduced to arylamino units. These then provided reactive sites for the immobilization of enzymes, as shown in Scheme III. 

FIGURE 3 Scanning electron micrograph (1200x magnification) of the surface of a porous alumina particle coated with poly(diphenoxy-phosphazene). Surface nitration, reduction, and glutaric dialdehyde coupling immobilized enzyme molecules to the surface. (From Ref. 23.)... 

Scanning electron micrographs of fracture surfaces revealed the presence of both amorphous and crystalline phases which corresponded to results from XRD analysis (Figure 6.12). What is of interest is that the crystalline phase is MgHP04.3H20 and not Mg(H2P04)2.2H2O or... 

Fig. 10. Scanning electron micrograph of a fracture surface parallel to the direction of extrusion of an extrudate of a 45 55 PS-HDPE blend with a viscosity ratio p 1. Fibrous PS is shown at different stages of breakup the diameter of the largest fiber is about 1 pm (Meijer el til., 1988).

Figure 5. Scanning electron micrograph of tensile fractured surface of 30% glass reinforced MA-modified PP (unstabi1ised, 1C1-HF22).

Fig. 6 (A) Scanning electron micrograph of the luminal surface of the large intestine (transverse colon magnification x 60). (From Ref. 9.) (B) Schematic diagram showing a longitudinal cross section of the large intestine. (C) Enlargement of cross section shown in B. (A and B modified from Ref. 10.)...

Figure 63 Scanning electron micrographs of the failure surface of the white backing layer of the bad packaging sample. Four layers were clearly visible in the SEM images. They are labeled as follows (1) outer clear polyester layer, (2) middle opaque polyethylene layer,... 

Figure 4. The effect of ultrasonic irradiation on surface morphology of approximately 5 /nm as shown by scanning electron micrographs of Ni powder.

Fig. 2. Scanning electron micrograph showing a natural microbial biofilm developed on surface of immobilized surface when dimethylphthalate was used as the sole source of carbon and energy after dehydration and critical-point dried and coating with palladium and gold (unpublished results). 

Figure 6. Scanning electron micrograph (SEM) of n-GaAs surface electrochemically etched with a scanning electrochemical and tunneling microscope (SETM). Etching was accomplished in Aq. 5 mU NaOH, 1 mM EDTA. Photoelectric current - 0.7 /iA, Scan rate - 0.1 /tm/sec, bias voltage — 4 V. Tip was moved in an "L" pattern. Reproduced with permission of Ref. 89. Copyright 1987 The Electrochemical Society Inc.

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