Advanced materials with complex interfaces, layer structures or small features are often needed to significantly improve products.
To characterize these materials dedicated analytical instruments with high spatial resolution, depth profiling capabilities, high surface sensitivity and great imaging are needed. Surface analytical techniques and Optical Photothermal Infrared (O-PTIR) Spectroscopy offers these capabilities and are therefore widely used, to characterize advanced materials. Our techniques cover a spatial resolution from a few nm to the µm range.
These techniques include:
- X-ray Photoelectron Spectroscopy (XPS)
- Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS)
- Auger electron spectroscopy (AES)
- Sub-micron IR Microscope
- Recycling preparative High Performance Liquid Chromatography (HPLC) for organic analysis
Surface Analysis techniques help you to understand the composition of the outer most atomic layers of a material which plays a critical role in properties such as: chemical activity, adhesion, wettability, electrostatic behavior, corrosion resistance, bio-compatibility, etc.
XPS, TOF-SIMS and AES are the classical surface analysis techniques. They detect electrons or ions emitted from the surface using different excitation beams. Typical is the characterization and imaging of chemical and elemental composition.
The ability to characterize thin film structures, via sputter depth profiling, provides a unique opportunity to examine the materials used in thin layers and to study their interaction with materials in adjacent layers.
All Surface Analysis techniques require ultra-high vacuum.
Photothermal Infrared Spectroscopy (PTIR)
The field of IR spectroscopy just changed!
- Sub-micron spatial resolution
- Nondispersive spectra on thick samples
- Non- contact measurements
How is Sub-micron IR spectroscopy and imaging possible? Optical Photothermal Infrared (O-PTIR) overcomes the IR diffraction limit by combining a mid-IR pulsed, tunable laser that heats the sample. When the IR laser is at a wavelength that excites a molecular vibration in the sample, absorption occurs, thereby creating photothermal effects including photothermal expansion. A visible probe laser, focused to 0.5 µm spot size, measures the photothermal response via the scattered light. The Sub-micron IR Microscope allows the usage of your existing IR database but significantly improve the spatial resolution even down to 500 nm.
Finally, it is possible to use IR Spectroscopy in nanoscale analysis.
Preparative chromatography is used to purify sufficient quantities of a substance. The key to improve separation in Preparative HPLC is the column length. However, there is a limit in column length due to back pressure. To solve this, recycling technique can be applied. With recycling technique, the chromatographic resolution increases by the square root of number of passes through the column and there is no solvent consumption.