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SPRITE: A modernized approach to scanning probe contact resonance imaging



Anthony B. Kos, Jason P. Killgore, Donna C. Hurley


We describe a system for contact resonance tracking called Scanning Probe Resonance Image Tracking Electronics (SPRITE). SPRITE can image two contact resonance frequencies simultaneously and thus can be used to acquire quantitative mechanical properties without requiring tedious image registration or other forms of post-processing. SPRITE is up to ten times faster than its predecessor, and its use of digital frequency synthesis means that the frequency is 100 times more precise. In addition, SPRITE can acquire quality factor images, which can be used to determine viscoelastic material properties. The resonant frequency of two eigenmodes and two corresponding quality facotr images can be acquired simultaneously. These new features can enable accurate nanomechanical imagign of surfaces and devices.
Measurement Science and Technology


atomic force acoustic microscopy, atomic force microscope, contact resonance spectroscopy, digital signal processor, elastic modulus, nanomechanics, rms-to-dc converter, scanning probe microscopy
Created January 20, 2014, Updated February 19, 2017