Drive-amplitude-modulation atomic force microscopy: from vacuum to liquids
EntityUAM. Departamento de Física Teórica de la Materia Condensada
10.3762/bjnano.3.38Beilstein Journal of Nanotechnology 3.1 (2012): 336-344
Funded byFunding by the Spanish government grants MAT2010-20843-C02-02, PLE2009-0065, Consolider CSD2010-00024 and CAM project and the Comunidad de Madrid No. 2009/MAT-1467. M. J. gives thanks for the JdC contract
ProjectComunidad de Madrid. S2009/MAT-1467/NANOOBJETOS
SubjectsControl systems; Atomic force microscopy; Dissipation; Frequency modulation; Noncontact; Física
Rights© 2012 Jaafar et al.
Esta obra está bajo una Licencia Creative Commons Atribución 4.0 Internacional.
We introduce drive-amplitude-modulation atomic force microscopy as a dynamic mode with outstanding performance in all environments from vacuum to liquids. As with frequency modulation, the new mode follows a feedback scheme with two nested loops: The first keeps the cantilever oscillation amplitude constant by regulating the driving force, and the second uses the driving force as the feedback variable for topography. Additionally, a phase-locked loop can be used as a parallel feedback allowing separation of the conservative and nonconservative interactions. We describe the basis of this mode and present some examples of its performance in three different environments. Drive-amplutide modulation is a very stable, intuitive and easy to use mode that is free of the feedback instability associated with the noncontact-to-contact transition that occurs in the frequency-modulation mode
Google Scholar:Jaafar Ruiz-Castellanos, Miriam - Martínez-Martín, David - Cuenca, Mariano - Raman, Arvind - Gómez Herrero, Julio - Melcher, John
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