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@ARTICLE{Giesen:851687,
      author       = {Giesen, Margret and Jugovac, Matteo and Zamborlini,
                      Giovanni and Feyer, Vitaliy and Gunkel, Felix and Müller,
                      David},
      title        = {{P}rincipal component analysis: {R}eveal camouflaged
                      information in x-ray absorption spectroscopy photoemission
                      electron microscopy of complex thin oxide films},
      journal      = {Thin solid films},
      volume       = {665},
      issn         = {0040-6090},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2018-05229},
      pages        = {75-84},
      year         = {2018},
      abstract     = {Principal component analysis (PCA) has become a standard
                      tool in spectromicroscopy and hyperspectral imaging to
                      handle large spectral data sets and to decompose raw data
                      into relevant and residual information. In particular in
                      studies of complex compounds, PCA can be used to disentangle
                      chemical information and thereby deepen the understanding of
                      chemical and physical material properties. Surprisingly, in
                      photoemission electron spectromicroscopy (PEEM), PCA is
                      rarely used. This paper serves to demonstrate how powerful
                      PCA can be to detect hidden chemical information in PEEM
                      data. We demonstrate the capability of PCA in PEEM
                      spectromicroscopy for the case of a thin film of a complex
                      quaternary oxide, Pr0.5Ba0.5CoO3-δ (PBCO) which is a main
                      contender catalyst material for electrocatalytic water
                      splitting. Upon annealing in air, PBCO decomposes into
                      different phases at the surface. Two of them become obvious
                      from the raw PEEM images, but one is revealed only after
                      PCA.},
      cin          = {PGI-6 / PGI-7},
      ddc          = {070},
      cid          = {I:(DE-Juel1)PGI-6-20110106 / I:(DE-Juel1)PGI-7-20110106},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113)},
      pid          = {G:(DE-HGF)POF3-113},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000447427400011},
      doi          = {10.1016/j.tsf.2018.09.010},
      url          = {https://juser.fz-juelich.de/record/851687},
}