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Atomic Force Microscopy

Torsional Resonance Tunneling AFM (TR TUNA)

Steps on HOPG as seen by the tip operating in TR mode
Steps on HOPG as seen by the tip operating in TR mode

Torsional Resonance Tunneling AFM (TR TUNA) is an enhanced TUNA option for our MultiMode and Dimension platforms. It allows TUNA to be used on soft or otherwise delicate samples by using torsional resonance (TR) mode instead of contact mode.

This greatly reduces vertical and lateral tip forces on samples while keeping the tip in the near field where the TUNA currents can be measured. This capability is especially important for polymer, thin film, and nanoelectronics applications.

 

Associated AFM Systems