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Figure 5
Coherent diffraction experiments performed on macroporous silica particles under controlled humidity. (a) Digital microscope image of the silica particle. (b) Water vapour adsorption isotherm of the particle, plotted with open circles. The diffraction-intensity ratio defined in the text is also plotted with cross symbols. (c) RH around the sample controlled by moist airflow (solid line). The diffraction intensity ratio is also plotted with cross symbols. (d) Coherent diffraction patterns of the single macroporous silica particle collected at the RHs indicated with arrowheads in (c). Non-upsampled patterns are shown. The red solid and broken circles indicate spatial frequencies of 4.0 µm−1 and 7.4 µm−1, respectively. The black square area in each pattern is the shadow of the beam stopper. The colour scales are shown at the bottom left-hand corner. The scale bar in (a) indicates 1 µm.

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