Journal Article ptychography wavefront metrology X-ray diffraction X-ray speckle tracking 3D printing Ferredoxins Metalloproteins Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. SFX X-ray fluorescence X-ray free-electron lasers X-ray optics X-ray projection imaging XFELs XPCS aerosols aperture background scattering coherent diffractive imaging free-electron laser in-line projection holography incoherent diffraction imaging interdiffusion metalloprotein metrology microfluidic devices multi-layer Laue lenses multilayers