Image resolution quantitative analysis

Chems et al [18] performed a detailed quantitative analysis of CBED data for (1010) inversion domains in GaN grown on sapphire and concluded that of the various structural models tested, only the IDB model [14] was consistent with their data. High resolution electron microscopy images [16,20] also support the IDB model. Such images show a shift in intensity of lattice fringes across the (1010) plane that is consistent with the proposed model. 

Figure 3.48 shows the fibril organization on the micrometer scale. The fibril possesses a random orientation. Already at this magnification, a periodic pattern on top of the fibril is discernible. For a quantitative analysis, higher resolution images are required. As described in [102], the analysis of the pitch of the periodic pattern can be performed using fast Fourier transform procedures. Dehydration leads to an alteration of the observed structure, thus suggesting the need for studies in liquid... 

In semicrystalline polymers, fillers may act as reinforcement, as well as nucle-ation agents. For example in PP, nanoscale silica fillers may nucleate the crystallization resulting in spherulites that show enrichment in particles in the center of the spherulite (Fig. 3.64). For a quantitative analysis of, e.g., filler sizes and filler size distributions, high resolution imaging is necessary and tip convolution effects [137-140] must be corrected for. The particles shown below are likely aggregates of filler particles considering the mean filler size of 7 nm [136]. 

Surface plasmon microscopy allows the recording of two-dimensional images of the potential distribution at the electrode and combines high temporal and spatial resolution with a nonperturbing nature. These properties, which are optimal for spatiotemporal dynamics studies, are confronted with two restraints. A quantitative analysis of the data is more... 

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