Experimental reconstruction of the contact resonance shape factor for quantification and amplification of bias-induced strain in atomic force microscopy
| Autor: | Akshay Deolia, Jason P. Killgore, Todd W. Murray, Lawrence H. Robins |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Cantilever Materials science Physics and Astronomy (miscellaneous) business.industry Amplifier Lithium niobate Stiffness Resonance 02 engineering and technology Particle displacement 021001 nanoscience & nanotechnology 01 natural sciences chemistry.chemical_compound Optics Piezoresponse force microscopy chemistry 0103 physical sciences medicine medicine.symptom 0210 nano-technology business Shape factor |
| Zdroj: | Applied Physics Letters. 114:133108 |
| ISSN: | 1077-3118 0003-6951 |
| Popis: | The contact resonance (CR) of a surface coupled atomic force microscope (AFM) cantilever can act as an amplifier of AC surface motion for piezoresponse force microscopy and related methods. However, the amplifier properties of the CR vary depending on tip-sample boundary conditions, leading to the appearance of displacement amplitude contrast when only stiffness contrast exists. It was recently proposed that the shape of the vibrating cantilever as a function of CR frequency could be analytically modeled and a shape factor calibration could be applied. Here, we demonstrate an experimental reconstruction of the contact resonance shape factor that can be used to quantify surface displacements in AFM measurements, without reliance on analytical models with uncertain input parameters. We demonstrate accurate quantification of surface displacement in periodically poled lithium niobate and pave the way for quantification of extremely small surface strains in the future.The contact resonance (CR) of a surface coupled atomic force microscope (AFM) cantilever can act as an amplifier of AC surface motion for piezoresponse force microscopy and related methods. However, the amplifier properties of the CR vary depending on tip-sample boundary conditions, leading to the appearance of displacement amplitude contrast when only stiffness contrast exists. It was recently proposed that the shape of the vibrating cantilever as a function of CR frequency could be analytically modeled and a shape factor calibration could be applied. Here, we demonstrate an experimental reconstruction of the contact resonance shape factor that can be used to quantify surface displacements in AFM measurements, without reliance on analytical models with uncertain input parameters. We demonstrate accurate quantification of surface displacement in periodically poled lithium niobate and pave the way for quantification of extremely small surface strains in the future. |
| Databáze: | OpenAIRE |
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