I understand epitaxal thin film, have lattice match with substrate. But what about those films that doesnt match but have only one XRD peak? Is this proof of single crystale thin film?


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  • $\begingroup$ What is characterized by one peak? Whether the lattices match or not? $\endgroup$ – andselisk Jan 26 '18 at 3:23
  • $\begingroup$ single crystal thin film @andselisk on GIXRD you will observe only one pick, is this correct? $\endgroup$ – SSimon Jan 26 '18 at 4:08
  • $\begingroup$ I'm still not following. What do you mean by "pick"? To select the certain lattice from an array? Or was it a typo and you meant "peak"? This is still the same x-ray diffraction, so there is going to be as many peaks as Bragg's law and systematic extinctions allow. Please refine your question as now it's quite hard to read and to understand what' you are trying to say. $\endgroup$ – andselisk Jan 26 '18 at 4:28
  • $\begingroup$ @andselisk XRD pick, in xrd analysis results $\endgroup$ – SSimon Jan 26 '18 at 4:30
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    $\begingroup$ English isn't my mother language too, I understand the struggle. I would't rely on a single peak only; this can serve as a lousy proof of crystallinity, but in general I'd do some supplementary tests such as XRF, AFM/SEM, maybe SAXS. $\endgroup$ – andselisk Jan 26 '18 at 4:54

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