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Título

Unlocking higher harmonics in atomic force microscopy with gentle interactions

AutorSantos, Sergio; Barcons, Victor; Font, Josep; Verdaguer, Albert
Palabras claveAtomic force microscopy
Higher harmonics
Heterogeneity
Composition
Chemistry
Fecha de publicación2014
EditorBeilstein-Institut für Literatur der Organischen Chemie
CitaciónBeilstein Journal of Nanotechnology 5: 268-277 (2014)
ResumenIn dynamic atomic force microscopy, nanoscale properties are encoded in the higher harmonics. Nevertheless, when gentle interactions and minimal invasiveness are required, these harmonics are typically undetectable. Here, we propose to externally drive an arbitrary number of exact higher harmonics above the noise level. In this way, multiple contrast channels that are sensitive to compositional variations are made accessible. Numerical integration of the equation of motion shows that the external introduction of exact harmonic frequencies does not compromise the fundamental frequency. Thermal fluctuations are also considered within the detection bandwidth of interest and discussed in terms of higher-harmonic phase contrast in the presence and absence of an external excitation of higher harmonics. Higher harmonic phase shifts further provide the means to directly decouple the true topography from that induced by compositional heterogeneity.
DescripciónThis is an Open Access article under the terms of the Creative Commons Attribution License.
Versión del editorhttp://dx.doi.org/10.3762/bjnano.5.29
URIhttp://hdl.handle.net/10261/131457
DOI10.3762/bjnano.5.29
Identificadoresdoi: 10.3762/bjnano.5.29
e-issn: 2190-4286
Aparece en las colecciones: (CIN2) Artículos
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