Nanomechanical Characterisation of Thin Films: Techniques and Applications

Nanomechanical characterisation of thin films is essential for understanding material performance at small scales, particularly in applications such as coatings, microelectronics, and advanced materials. Techniques such as nanoindentation, nanoscratch, and nanowear testing provide detailed insights into properties including hardness, modulus, friction, and wear behaviour. This page explores the key techniques used for thin film characterisation and how they are applied in research and industrial environments.

What Is the Nanomechanical Characterisation of Thin Films?

Nanomechanical characterisation involves measuring mechanical properties at the micro- and nanoscale to understand how thin films behave under load. This is particularly important for coatings and layered materials, where surface and interface properties strongly influence performance. This is relevant in areas including:

• Microelectronics
• Optics and optical coatings
• MEMS devices
• Hard and corrosion-resistant coatings
• Photovoltaics
• Shape memory alloys

In-Situ Testing for Thin Film Characterisation

• In-situ SPM imaging – Qualitative surface analysis before and after testing, including surface roughness quantification.
• Nanoindentation – Quantitative material properties including hardness, modulus, stiffness, and depth profiling.
• Ramping force nanoscratch – Quantification of film delamination and breakthrough.
• Reciprocating nanoscratch – Tribology, friction, and wear failure.
• ScanningWear – Wear resistance and wear volume quantification.

Additional in-situ nanomechanical characterisation techniques can reveal even more information about ultra-thin films. For example, Modulus Mapping analyses the quantitative mechanical properties of the film surface to a depth of 1–2 nm. This can overcome the hard-film-on-soft-substrate effect often observed in such films. Other techniques include acoustic emission sensing, nanoscale electrical contact resistance characterisation, and fracture toughness measurement. All of these techniques can be performed with Hysitron nanoindentation systems.

Applications of Thin Film Characterisation

Nanomechanical characterisation of thin films is used across a range of applications, including:

• Coatings and surface engineering
• Microelectronics and semiconductor materials
• Hard and protective coatings
• Polymers and soft films
• Tribology and wear analysis

The Hysitron TI 950 TriboIndenter

Systems such as the Hysitron TI 950 TriboIndenter enable advanced nanomechanical testing of thin films, supporting techniques including nanoindentation, nanoscratch, and nanowear analysis. The Hysitron TI 950 TriboIndenter, equipped with the Performech advanced control module, provides the force and displacement sensitivity required to test materials and structures down to the low end of the nanoscale.

• Full range of characterisation techniques
• Automated staging and testing routines
• In-situ SPM imaging

Nanotribology and Friction in Thin Films

In this example, constant-force nanoscratch tests were conducted on (100) Si and fused quartz. The same nanoscratch transducer and conospherical diamond probe were used for both tests. The nanoscratch results below reveal subtle yet discernible differences in nanoscale tribological behaviour and friction between the samples. A stick-slip tribological phenomenon is observed for both materials. However, the periodicity and amplitudes of the respective friction plots are noticeably different. Changes in both the magnitude of friction and the amplitude of the sinusoidal trend during scratches suggest the presence of subtle surface inhomogeneities. These are revealed by the improved lateral noise performance of tests carried out with the Performech control module.

Nanoscratch Testing for Thin Films

Delamination and breakthrough on ultra-thin DLC films The previous example used a constant nanoscratch to show absolute friction magnitudes. Ramping-force scratches can also be performed on ultra-thin films. Distinct changes in the force, displacement, and friction curve profile caused by delamination or breakthrough are identified as critical events, which can then be quantified for further material characterisation studies. In this example, ramping-force nanoscratch tests were performed on ultra-thin DLC films used in hard disk drives. Critical breakthrough and delamination events were pinpointed and quantified. Again, both Performech and standard control system data are shown for comparison. Subtle changes in the friction profile displayed in the Performech tests corresponded to critical delamination and breakthrough events. Comparative friction plots from the Performech and standard control systems are also shown below. A critical breakthrough and delamination event is highlighted in the Performech nanoscratch friction data.

Nanowear Testing for Thin Films

Nanotribology and failure on ultra-thin TiN films Multiple-cycle wear testing with nanoscale sensitivity and precision delivers useful nanotribological data that cannot be obtained with standard macro- and microscale wear testing methods. In this example, reciprocating nanowear tests were performed on ultra-thin 50 nm TiN films using the Performech. The plots below show friction and normal displacement on a colour scale as a function of lateral position and the reciprocating scratch segment. They reveal a breakthrough event and continued wear of the underlying substrate layer. The breakthrough event at segment 14 is marked by distinct changes in friction and normal displacement. The probe then continues to wear into the substrate material.

These techniques support improved material design, performance evaluation, and quality control in thin film applications. Blue Scientific is the official Nordic distributor for Hysitron in Finland, Denmark, Iceland, Norway and Sweden. If you have any questions or would like a quote, please get in touch. Last updated: March 2026