Surface Preparation

Surface preparation is a critical step in ensuring the reliability and precision of surface-sensitive analytical techniques such as X-ray Photoelectron Spectroscopy (XPS), Angle-Resolved Photoemission Spectroscopy (ARPES), and Scanning Probe Microscopy (SPM). The quality of the data acquired in these techniques is directly influenced by how clean, well-ordered, and reproducible the sample surface is. Via VSM Instruments, SPECS and CreaTec offer an extensive suite of tools designed to enable precise, in-vacuum sample preparation, essential for success in modern surface science.

SPECS provides a comprehensive portfolio of ion sources, RF and ECR plasma sources, and e-beam evaporators, key technologies for preparing surfaces under ultra-high vacuum (UHV) conditions. Ion sources (using ions of inert gases such as Ar⁺) are frequently used for sputter cleaning, removing contamination layers and oxide films from a sample surface. Plasma sources allow for gentle, large-area etching or surface activation, while e-beam evaporators are ideal for depositing ultra-pure thin films or calibration layers with precise control over thickness and composition. These tools are widely integrated into UHV preparation chambers in both research and industry.

For applications involving material growth or doping, Createc’s effusion cells offer precise thermal evaporation of elemental or molecular species, making them indispensable in molecular beam epitaxy (MBE) systems and custom surface science setups. Their stability and purity are key for controlled deposition processes, such as doping semiconductors or growing 2D materials.

Complementary surface preparation techniques are also essential. Low Energy Electron Diffraction (LEED) is commonly used to verify atomic surface order after cleaning or reconstruction. Sample annealing, either via resistive or electron-beam heating, enables surface relaxation, removal of adsorbates, or phase transitions necessary for achieving clean and well-ordered surfaces prior to analysis.

Together, these preparation tools and diagnostics form the backbone of any high-performance surface science setup. Whether you’re working in a national laboratory, university research group, or an industrial R&D environment, a properly prepared surface is the foundation for reproducible, high-quality measurements in modern surface analytics.

Relevant products

Ion Sources

We have several ion source options in our product range including a simple robust ion source for sample preparation on small (typically flag-style) samples. Our more advanced IQE12 series sources can also be used for sample cleaning but offer focus and raster capability with depth profiling and ISS (Ion Scattering Spectroscopy) or SIMS (Secondary Ion Mass Spectroscopy) applications in mind (an optional Wien mass filter is available for the latter two applications). A version of IQE12 is available for applications where a beam of low energy ions is needed for charge neutralisation. The sources are based on extractor technology with a yttrium oxide coated iridium filament making them suitable for both reactive and inert gases.

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Effusion cells (Evaporators, “K-cells”)

Effusion Cells are used in ultra-high vacuum (UHV) evaporation systems, for example in MBE (Molecular Beam Epitaxy) to generate ultrapure molecular and atomic beams from a large variety of elements and compounds. They are sometimes known as K-Cells or Knudsen Cells. In the product table you can see a range of different cells we can offer to evaporate almost every material. Temperatures range from: -60 °C to 2400 °C

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Electron Beam Evaporators

Our range of e-beam evaporators are designed to evaporate low vapour pressure materials. The material is heated in a localised area by an electron beam produced from a filament biased relative to the rod of the desired material or to a crucible containing it. Our smaller sources are typically optimised for highly controlled deposition of very thin layers in the range of a monolayer or a few nm onto smaller flag-style samples. As the sources get larger, material capacity and possible sample size increases accordingly.

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VB(U)HS Series Sample Stages

These VB(U)HS sample stages are designed to fit to our VBHVK Series cryostats, as well as directly to an XYZ manipulator or rotation stage when cooling is not required. Versions with cooling are constructed from gold-coated copper which facilitates excellent sample cooling due to a good thermal connection to the cryostat, and can be optionally configured for different sample entry directions. Cooling connection is either via direct contact to the cryostat or via VCR connectors and stainless steel tubing in the case of liquid nitrogen-only cooling. They can be equipped for 3 different types of sample heating – alumina heater, e-beam heating and direct current heating. The e-beam versions offer a higher maximum temperature than alumina but require a special sample holder with a hole for best performance.

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Low Energy Electron Diffraction (LEED) with optional Auger Electron Spectroscopy (AES)

Low Energy Electron Diffraction (LEED) is one of the most powerful methods to determine surface structures. Analysis of LEED patterns and intensities provides the size and shape of the surface unit cell, the degree of order and detailed atomic structure with a precision of the order of picometers. Our LEED optics also enable Auger Electron Spectroscopy (AES) when equipped with the appropriate (optional) control unit. AES is a technique to provide chemical analysis of the surface. Our LEED optics are available in two flange sizes, DN100CF and DN150CF. We recommend the largest possible flange size if the chamber allows it, as larger screen sizes much are easier to work with and the cost saving for the smaller optics is minimal.

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VBGDV6/16 UHV Fine Leak Valve

A UHV fine leak valve with DN16CF flanges designed as a highly controllable manually-operated gas inlet for vacuum chambers, ion sources, plasma sources etc.

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