COUTURIER, Gérard; BOISGARD, Rodolphe; NONY, Laurent; AIMÉ, Jean-Pierre

doi:10.1063/1.1564274

Metadatos

Mostrar el registro completo del ítem

Licencia de uso del documento

COUTURIER, Gérard
Centre de physique moléculaire optique et hertzienne [CPMOH]

BOISGARD, Rodolphe
Centre de physique moléculaire optique et hertzienne [CPMOH]

NONY, Laurent
Laboratoire matériaux et microélectronique de Provence [L2MP]

Idioma

Article de revue

Este ítem está publicado en

Review of Scientific Instruments. 2003, vol. 74, p. 2726-2734

American Institute of Physics

Resumen en inglés

The aim of this article is to provide a complete analysis of the behavior of a noncontact atomic force microscope (NC-AFM). We start with a review of the equations of motion of a tip interacting with a surface in which the stability conditions are first revisited for tapping mode. Adding the equations of automatic gain control (AGC), which insures constant amplitude of the oscillations in the NC-AFM, to the equations of motion of the tip, a new analytical stability criterion that involves proportional and integral gains of AGC is deduced. Stationary solutions for the shift of frequency and for the damping signal are obtained. Special attention is paid to the damping signal in order to clarify its physical origin. The theoretical results are then compared to those given by a virtual machine. The virtual machine is a set of equations solved numerically without any approximation. The virtual machine is of great help in understanding the dynamical behavior of the NC-AFM as images are recorded. Transient responses of the shift in frequency and of the damping signal are discussed in relation to the values of proportional and integral gains of AGC.< Leer menos

Palabras clave en italiano

Noncontact AFM

apparent dissipation

apparent damping

virtual machine

non-linear dynamics

Metadatos

Licencia de uso del documento

Non-contact atomic force microscopy: Stability criterion and dynamical responses of the shift of frequency and damping signal

Idioma

Este ítem está publicado en

Resumen en inglés

Palabras clave en italiano

DOI

Orígen

Centros de investigación