Understanding the Relationship Between Localized Mechanical Properties and Material Structure
Direct coupling of Raman spectroscopy with nanoindentation provides comprehensive mechanical characterization capabilities of materials at the nanoscale and its direct correlation to the localized chemical composition. The vibrational (phonon) states of molecules detected using Raman spectroscopy give a molecular fingerprint of the physical state of a matter. At the same time, a nanoindentation curve serves as a fingerprint of a material’s mechanical properties. In-situ Raman mapping performed before mechanical testing allows for precise positioning of the mechanical test based on chemical structure. Additionally, Raman maps performed after nanomechanical tests provide comprehensive information about the internal stress distribution within the material, resulting from plastic deformation during the test. Raman maps can be acquired in fully automated routines together with in-situ SPM imaging, modulus maps, or electrical conductance maps.
Hysitron’s Raman Spectroscopy upgrade option is available on all TriboIndenter® nanomechanical test instruments, providing a direct relationship between nanomechanical properties and Raman spectra. High precision, encoded stages provide a spatial correlation of 100nm between the two characterization techniques. Hysitron preserves the concept of modularity with the Raman-enabled systems; allowing almost any laser source and spectrometer to be used with the system, based on specific research needs.
Hysitron’s Raman Spectroscopy Features
- Direct correlation of in-situ chemical and mechanical mapping of the area of interest
- Understanding the relationship between mechanical and structural properties
- Capability of using topographical as well as chemical mapping for precise nanomechanical test placement
- Automated Raman analysis before and after nanoindentation for investigation of structural changes resulting from the deformation process
- Chemical and mechanical characterization at different length scales by definable laser spot size combined with nano- to micro-scale mechanical testing
- Broad spectrum of laser wave lengths for a wide range of applications
- Compatible with all Hysitron testing techniques
- Available on all new and existing TI 900, TI 950, and TI 980 TriboIndenter® systems