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Center for Nanoscale Materials

Quantum and Energy Materials Capabilities

Quantum and Energy Materials seeks to take control of materials at the atomic and molecular scale to better understand and utilize their behavior and properties.

Synthesis

  • Colloidal chemistry and self-assembly techniques
  • Complex oxide film synthesis via molecular beam epitaxy (DCA R450 Custom)
  • Physical vapor deposition (Lesker CMS 18 and PVD 250)

Theory

  • Would you like Theory with that? Joint experimental-theory proposals are possible and encouraged; visit the Theory & Modeling group’s webpage for more information about their capabilities. 

Characterization

  • Variable-temperature (VT) scanning tunneling microscope with atomic force microscopy capabilities (Omicron VT-AFM/STM), operates in an ultrahigh vacuum (UHV) environment with a base pressure of < 1E-10mbar and 55-400K. Atomic resolution is routinely obtained at room temperature and below. The AFM capabilities support a range of scanning modes. The analysis chamber also houses a LEED/Auger with an attached preparation chamber for sample cleaning and deposition (e.g. sputter cleaning, direct current heating, e-beam heating stage, metal deposition).
  • Low-temperature ultrahigh vacuum scanning tunneling microscope (4K base with temperature variability) with 6 Texternal magnetic field applied normal to the sample surface. Intended for variable temperature high impact research requiring an external magnetic field (Omicron Cryo SFM).
  • Variable-temperature scanning tunneling microscope with optical access (home-built optical VT-STM) operates in an UHV environment with a base pressure of < 1E-10 mbar and 55-300 K. Atomic resolution can be obtained at room temperature and below on appropriate samples. The analysis chamber also houses a LEED/Auger with an attached preparation chamber for sample cleaning and deposition (sputter cleaning, direct current heating, e-beam heating stage, metal deposition).
  • Low-temperature scanning tunneling microscope (LT-STM, Createc).
  • Scanning probe microscope Veeco Multi Mode 8 [contact or tapping mode, fluid imaging, low-current scanning tunneling microscopy, magnetic force microscopy, variable temperature imaging (-30-250°C), Peak Force tapping mode and PeakForce quantitative nanomechanical mapping].
  • Internal/external quantum efficiency measurement system (Oriel IQE-200)
  • Laser scanning interferometric microscope 
  • Luminescence spectrometer (Perkin-Elmer LS55)
  • Magnetic and physical properties characterization suite ( Keithley 4200-SCS/F Semiconductor Parameter Analyzer, Quantum Design PPMS-9and MPMSXL)
  • Optical microscope (Zeiss Axio Imager Z1 M Upright)
  • Rheometer (Anton Paar Physica MCR 301). This can be accessed alone or as part of the joint CNM/APS rheometry small angle X-ray scattering X-ray photon correlation spectroscopy system (Rheo-SAXS-XPCS) housed at Sector 8-ID-I of the APS.
  • Thermal analysis [differential scanning calorimetry (Mettler Toledo 823) and thermogravimetric analysis (Mettler Toledo 851)]
  • Ultraviolet-visible-near-infrared spectrometer (Perkin-Elmer Lamda 950)
  • X-ray diffractometer (Bruker D8 Discover, point detector, VÅNTEC-1 linear detector; Bragg-Brentano powder, Grazing incidence, high-resolution four-circle, reciprocal space mapping, reflectivity, rocking curves)

Synchrotron X-ray Scanning Tunneling Microscopy (SX-STM)

Synchrotron X-ray scanning tunneling microscopy (SX-STM) is a new imaging technique that uniquely combines the best of two worlds: the exceptional chemical, magnetic, and structural sensitivity of X-rays combined with the unparalleled ability of scanning probe microscopy to resolve and manipulate surfaces down to single atoms. In collaboration with the APSX-ray Science division we are developing XTIP, the world’s first dedicated synchrotron beamline for SX-STMXTIP, located at Sector 4 of the APS, is under construction and will become operational in 2018. Until then, we provide limited beamtime at APS beamline 4-ID-C to General Users for early-science SX-STM experiments.These experiments will focus on the study of chemical and magnetic properties of nanoscale materials using SX-STM at photon energies between 500 to 2500 eV.