Editing Synchrotron light source (section)

===Imaging===
[[File:APS - Nanoprobe.jpg|thumb|right|X-ray nanoprobe beamline at the [[Advanced Photon Source]]]]
Synchrotron X-rays can be used for traditional [[X-ray imaging]], [[phase-contrast X-ray imaging]], and [[tomography]]. The Ångström-scale wavelength of X-rays enables imaging well below the [[diffraction limit]] of visible light, but practically the smallest resolution so far achieved is about 30&nbsp;nm.<ref>Argonne National Laboratory Center for Nanoscale Materials, [http://www.anl.gov/cnm/capabilities/x-ray-microscopy-capabilities "X-Ray Microscopy Capabilities"], accessed 2016-06-20</ref> Such [[Nanoprobe (device)|nanoprobe]] sources are used for [[scanning transmission X-ray microscopy]] (STXM). Imaging can be combined with spectroscopy such as [[X-ray fluorescence]] or [[X-ray absorption spectroscopy]] in order to map a sample's chemical composition or oxidation state with sub-micron resolution.<ref>{{cite journal | last1=Beale | first1=Andrew M. | last2=Jacques | first2=Simon D. M. | last3=Weckhuysen | first3=Bert M. | title=Chemical imaging of catalytic solids with synchrotron radiation | journal=Chemical Society Reviews | volume=39 | issue=12 | year=2010 | pages=4656–4672 | doi=10.1039/c0cs00089b | pmid=20978688 | hdl=1874/290865 | hdl-access=free }}</ref>