SPM Aarhus 150 HT

Extremely Stable and Highly Versatile SPM Aarhus 150 SPECS for Ultimate High Temperature Scanning Probe Microscopy Applications

By adding a radiative heater element with a high stability power supply, the SPM Aarhus 150 allows imaging of all kinds of samples at temperatures exceeding 1300K (650K with KolibriSensor™). SPM Aarhus 150 HT can be used with both STM tips as well as with KolibriSensor™ without any compromises on its stability. Using improved heat flow management it is possible to suppress thermal drift with ultimate mechanical and thermal stability regardless of temperature and duration of the experiment. The instrument runs in the thermal steady-state condition meaning that sample is the only object that changes its temperature during operation. All other parts of the instrument stay at the constant temperature thus minimizing thermal drift. To achieve this a combination of permanent cooling and counter heating of the scanner platform is used. Special heaters are integrated on the scanner platform and on the scanner itself and are constantly regulated compensating changes in the power flow induced by the change of the sample temperature. Thus the scanner platform acts as a heat sink for the power flow from the hot sample to the scanner ensuring excellent thermal stability and uncompromised SPM performance. A direct in-situ optical access allows for the sample illumination and investigation of light induced processes. Additionally an evaporation port permits in-situ deposition and investigation of the growth processes during scanning.

KEY FEATURES

  • Extreme stability
  • Highest productivity
  • High Temperature Applications
  • In-situ tip preparation
  • Capable of video speed scanning
  • KolibriSensor for combined nc-AFM and STM
  • SPC 260 or Nanonis™ control system

MADE FOR THESE METHODS

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SPECIFICATIONS

SPM Aarhus 150 HT
Mounting
Mounting Flange

150CF

Control Electronics

  • Nanonis
  • SPC 260

Performance
Temperature Stability

Better than ±2 K (150 K...1300 K)

Sensitivity z Range

±175 nm

Drift Rate

< 0.05 nm/min (vert), < 0.15 nm/min (lat)

Stability

< 10 pm

Operation
In-Situ Access

Specular and evaporation

Scan Range

1.500 nm x 1.500 nm

Temerature Control

2 controlled subsystems for sample & scanner

Operating Modes

  • STM
  • AFM

Sensors

  • STM tip
  • KolibriSensor

Optional Accessories

  • STM tips
  • Kolibri sensors
  • Sample holders

Required Accessories

  • STM tips
  • Kolibri sensors
  • Sample holders

Working Pressure

10-11 to 10-7 mbar

PUBLICATIONS

  1. (2015) Piezoelectric oscillation sensor based noncontact atomic force microscope for imaging in both ambient and liquid environments

    A new design of a noncontact atomic force microscope (AFM) is introduced in this paper, based on a piezoelectric oscillator sensor (PEOS) for ambient and liquid environments. Because of the recent development of quartz technology, the PEOS sensor operates independently from conventional laser alignments. The sensor is based on the length extension resonator, which has high force sensitivity and can deliver high resolution AFM images in ultrahigh vacuum. The oscillator design was tested in different gas compositions and liquids to determine its oscillation stability. The scan performance was investigated in both air and liquid on the topography of an inorganic hard material, graphite. The usability of PEOS for soft organic materials was further proven by imaging biological samples of DNA origami.



    J. P. Froning, D. Xia, S. Zhang, E. Lægsgaard, F. Besenbacher, M. Donga
    Journal of Vacuum Science & Technology B 33, 021801
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  2. (2015) Scanning probe microscopy and spectroscopy of graphene on metals

    Graphene‐metal interfaces have been the subject of surface science since the beginning of 1960s when the studies of the catalytic properties of the metallic surfaces with low‐energy electron diffraction methods were started. After discovery of the unique transport properties of graphene defined by its electronic structure, i.e. the linear dispersion of the electronic states E(k) in the vicinity of the Fermi level, many applications of graphene were proposed and recently realised. These findings renew the interest in graphene on metals as it was realised that synthesis of graphene on metals with its further transfer on insulating or polymer support is the most perspective way to move this technology from lab to industry. Recent applications of scanning probe microscopy and spectroscopy methods to graphene‐ metal systems, from complete layers to nanostructures, shed light on the mechanism of interaction at the interface between graphene and metal that defines the electronic properties of the system and its transport properties (see the Feature Article by Dedkov et al. on pp. 451–468). Besides, fascinating quantum phenomena inherent in graphene nano‐objects open a door for the application of graphene in future nanotechnology.



    Y. Dedkov, E. Voloshina, M. Fonin
    Basic solid state physics 252 (3)
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  3. (2014) Multichannel scanning probe microscopy and spectroscopy of graphene moiré structures

    The graphene moiré structures on 4d and 5d metals, as they demonstrate both long (moiré) and short (atomic) scale ordered structures, are the ideal systems for the application of scanning probe methods. Taking graphene–Ir(111) as an example, we present the complex studies of this graphene–metal moiré–structure system by means of 3D scanning tunnelling and atomic force microscopy/spectroscopy as well as Kelvin-probe force microscopy. The results clearly demonstrate variation of the moiré and atomic scale contrast as a function of the bias voltage as well as the distance between the scanning probe and the sample, allowing one to discriminate between topographic and electronic contributions in the imaging of a graphene layer on metals. The presented results are compared with the state-of-the-art density functional theory calculations demonstrating excellent agreement between theoretical and experimental data.



    Y. Dedkov, E. Voloshina
    Phys. Chem. Chem. Phys. 16, 3894-3908
    Read more
  4. (2013) Electronic structure and imaging contrast of graphene moiré on metals

    Realization of graphene moiré superstructures on the surface of 4d and 5d transition metals offers templates with periodically modulated electron density, which is responsible for a number of fascinating effects, including the formation of quantum dots and the site selective adsorption of organic molecules or metal clusters on graphene. Here, applying the combination of scanning probe microscopy/spectroscopy and the density functional theory calculations, we gain a profound insight into the electronic and topographic contributions to the imaging contrast of the epitaxial graphene/Ir(111) system. We show directly that in STM imaging the electronic contribution is prevailing compared to the topographic one. In the force microscopy and spectroscopy experiments we observe a variation of the interaction strength between the tip and high-symmetry places within the graphene moiré supercell, which determine the adsorption sites for molecules or metal clusters on graphene/Ir(111).



    E. N. Voloshina, E. Fertitta, A. Garhofer, F. Mittendorfer, M. Fonin, A. Thissen, Yu. S. Dedkov
    Scientific Reports 3, Article number: 1072
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  5. (2012) Graphene on Rh(111): Scanning tunneling and atomic force microscopies studies

    The electronic and crystallographic structure of the graphene/Rh(111) moiré lattice is studied via combination of density-functional theory calculations and scanning tunneling and atomic force microscopy (STM and AFM). Whereas the principal contrast between hills and valleys observed in STM does not depend on the sign of applied bias voltage, the contrast in atomically resolved AFM images strongly depends on the frequency shift of the oscillating AFM tip. The obtained results demonstrate the perspectives of application atomic force microscopy/spectroscopy for the probing of the chemical contrast at the surface.



    E. N. Voloshina, Yu. S. Dedkov, S. Torbrügge, A. Thissen, M. Fonin
    Appl. Phys. Lett. 100, 241606
    Read more
  6. (2010) C60 on Nanostructured Nb-Doped SrTiO3(001) Surfaces

    Nanostructured Nb-doped SrTiO3(001) surfaces were investigated with STM, and the surface patterns for observed nanostructures were assigned. Sequential C60 deposition onto these nanostructured templates reveals distinct growth modes, including discrete small C60 islands on the c(4 × 2) reconstruction surface, parallel one-dimensional C60 chains on (6 × 2) dilines, C60 double chains on (8 × 2) trilines, epitaxial C60 close packed adlayers over (11 × 2) tetralines, and two-dimensional ordered C60 dimer arrays on (7 × 6) waffles. These structural diversities mainly stem from the relatively strong adsorbate−substrate interactions as well as the surface topography demands. The nanostructured oxide surfaces as templates thus have great potential in molecular nanoarchitecture.



    C. Lu, E. Zhu, Y. Liu, Z. Liu, Y. Lu, J. He, D. Yu, Y. Tian, B. Xu
    Journal of Physical Chemistry C 114 (8), pp. 3416–3421
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  7. (2010) Distinct C60 growth modes on anthracene carboxylic acid templates

    Two anthracene carboxylic acid (AnCA) self assembly structures on Ag(111) were employed to investigate the template effects on sequentially deposited C60 molecules using scanning tunneling microscope. The initial AnCA structures execute strong modulations on C60 growth. Either laterally separated AnCA–C60 elongated domain arrays or an “epitaxial” C60 dimer structure over AnCA can be formed depending on the selected AnCA template. These distinct C60 growth modes are closely related to the structural stability of the AnCA templates. Our studies suggest a pathway of molecular nanostructure fabrication through the choice of suitable template.



    B. Xu, E. Zhu, C. Lu, Y. Liu, Z. Liu, D. Yu, J. He, Y. Tian
    Applied Physics Letters 96, 143115
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  8. (2008) Dimerization Boosts One-Dimensional Mobility of Conformationally Adapted Porphyrins on a Hexagonal Surface Atomic Lattice

    We employed temperature-controlled fast-scanning tunneling microscopy to monitor the diffusion of tetrapyridylporphyrin molecules on the Cu(111) surface. The data reveal unidirectional thermal migration of conformationally adapted monomers in the 300−360 K temperature range. Surprisingly equally oriented molecules spontaneously form dimers that feature a drastically increased one-dimensional diffusivity. The analysis of the bonding and mobility characteristics indicates that this boost is driven by a collective transport mechanism of a metallosupramolecular complex.



    M. Eichberger, M. Marschall, J. Reichert, A. Weber-Bargioni, W. Auwärter, R. L. C. Wang, H. J. Kreuzer, Y. Pennec, A. Schiffrin, J. V. Barth
    Nano Letters 8, 4608
    Read more

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