W-1000_XRD (IMAGE)
Caption
XRD results for the W-1000 mixture. Upper panel: diffraction patterns of W-1000 in the vitrified SmCA* phase in −123°C and in the SmCA* phase after 10-weeks-long storage in the room temperature. The schematic structure of the SmCA* phase is presented. The tilt of molecules is in the opposite direction in neighbour layers. Within layers, only the short-range order, like in liquids, is present. Bottom panel: smectic layer spacing and correlation length of the short-range order vs. temperature determined from the XRD patterns of W-1000. Note the change in temperature dependence of both parameters at the glass transition temperature, indicated by the vertical dashed line.
Credit
Source: IFJ PAN
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License
CC BY-SA