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(a) Schematic illustration of a supported lipid monolayer displaying domains of FL17. Molecular structure of FL17 (space filling model) is presented as an inset. (b) Fluorescence image of a supported phospholipid monolayer with FL17 and TR-DHPE. The region of interest (, indicated by the red/dark square) is sampled from each image, and images are subjected to the image analysis. The domains of FL17 (highlighted in dark/red) are identified from the surrounding phospholipids matrix (blue/background) by the contrast in the pixel values. The zoom-up image (inset) suggests the formation of submicrometer domains. (c) 2D Fourier transformation of images would reveal a broad halo around the center. Radial integration of the circular halo (inset) the characteristic lengths .
(a) Schematic view of the analyzer crystal setup used for GID measurements. (b) The intensity of the diffracted beam from the monolayer with FL17, integrated along . The complete reciprocal space map is available online [supplemental Information (Ref. 7)]. The characteristic distance between fluorocarbon chains and the size of crystallites can be calculated, respectively.
Distribution function of the distance to the nearest neighbor plotted vs . The black line represents a Gaussian fit for each molar fraction. Though the decrease in FL17 leads to an increase in the peak position and width, a distinct peak can be observed even at .
(a) The radial distribution function of microdomains vs . Note that a broad peak observed in Fig. 3 cannot be identified, as takes all correlations into account. (b) The potential of mean force vs calculated from the inverse work theorem . More than one order can be observed at , indicating a strong correlation between self-assembled FL17 domains, ranging up to . Spring constants derived from a harmonic potential fit of the first order minima systematically increase with FL17.
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