Kratos Axis Ultra XPS


Nanomaterials, photovoltaics, catalysis, corrosion, adhesion, electronic devices and packaging, magnetic media, display technology, surface treatments, and thin film coatings used for numerous applications

  • Chemical composition
  • Element state of materials
  • Element distribution
  • Depth-profiling
  • In-situ heating and cooling


Kai Sun


Room G019


Publications, presentations, and posters resulting from work on this instrument should state: “The authors acknowledge the financial support of the University of Michigan College of Engineering and NSF grant #DMR-0420785, and technical support from the Michigan Center for Materials Characterization.”


  • X-ray Sources: Monochromatic Al source, Al and Mg regular sources
  • Operating Conditions
    • Spectrum mode: ~ 10 mA ~ 15 kV
    • Parallel XPS imaging
  • Vacuum System
    • Specimen Transfer Chamber (STC): <5 x 10-7 torr
    • Specimen Analysis Chamber (SAC): ~1 x 10-9 torr
  • Specimen Stage
    • Motorized sample movement in x, y, z directions and tilting
    • Can be operated at ~600 oC to -100 oC
  • Analysis Area
    • Spectrum mode: Using the monochromated Al source, 2 x 1 mm with energy resolution ~0.5 ev
    • Small area spectroscopy: ~ several µm
    • Imaging mode: ~ 900 µm x 900 µm with spatial resolution ~ 6 µm

References and Publications

  1. Indium-doped Co3O4 nanorods for catalytic oxidation of CO and C3H6 towards diesel exhaust, L. Ma, C.Y. Seo, X.Y. Chen, K. Sun, J.W. Schwank, Applied Catalysis B-Environmental, 222, 44-58, 2017
  2. Interplay of Corrosion and Photocatalysis During Nonaqueous Benzylamine Oxidation on Cadmium Sulfide, JL DiMeglio and BM Bartlett, Chemistry of Materials, 29 (17), 7579-7586, 2017
  3. Direct observation of hydrogenation and dehydrogenation of a zirconium alloy, H.H. Shen, X.T. Zu, B. Chen, C.Q. Huang and K. Sun, Journal of Alloys and Compounds, 659, 23-30, 2016
  4. Memristive behavior and ideal memristor of 1T phase MoS2 nanosheets, P.F. Cheng, K. Sun, and Y.H. Hu, Nano Letters, 16(1), 572-576, 2016
  5. An efficient counter electrode material for dye-sensitized solar cells—flower-structured 1T metallic phase MoS2, W. Wei, K. Sun, Y.H. Hu, Journal of Materials Chemistry , 4(32), 12398-12401, 2016
  6. Mechanically-induced reverse phase transformation of MoS2 from stable 2H to metastable 1T and its memristive behavior, P. Cheng, K. Sun, Y.H. Hu, RSC Advances, 6(70), 65691-65697, 2016
  7. The bright future for electrode materials of energy devices ─ highly conductive porous Na-embedded carbon, W. Wei, L. Chang, K. Sun, A. Pak, E. Paek, G. Hwang, Y.H. Hu, Nano Letters, 16(12), 8029-8033, 2016
  8. In Situ Chemical Modification of Schottky Barrier in Solution-Processed Zinc Tin Oxide Diode, Youngbae Son, Jiabo Li, and Rebecca L. Peterson*, ACS Appl. Mater. Interfaces, 8(36), 23801–23809, 2016
  9. Kinetic Trapping of Immisicible Metal Atoms into Bimetallic Nanoparticles through Plasmonic Visible Light-Mediated Reduction of a Bimetallic Oxide Precursor: Case Study of Ag-Pt Nanoparticle Synthesis U. Aslam, S. Linic Chemistry of Materials 28(22) 8289-8295 2016
  10. Kazyak, E.; Wood, K. N.; Dasgupta, N. P. Improved Cycle Life and Stability of Lithium Metal Anodes through Ultrathin Atomic Layer Deposition Surface Treatments. Chem. Mater. 2015, 27 (18), 6457–6462
  11. Bielinski, A. R.; Kazyak, E.; Schlepütz, C. M.; Jung, H. J.; Wood, K. N.; Dasgupta, N. P. Hierarchical ZnO Nanowire Growth with Tunable Orientations on Versatile Substrates Using Atomic Layer Deposition Seeding. Chem. Mater. 2015, 27 (13), 4799–4807
  12. X. Zhang, M. Lang, J.W. Wang, W.X. Li, K. Sun, V. Prakapenka, R.C. Ewing, High-pressure U3O8 with the fluorite-type structure, Journal of Solid State Chemistry 213  110-115 (2014).