An improved in situ measurement of offset phase shift towards quantitative damping-measurement with AFM.
Ultramicroscopy
; 108(9): 821-5, 2008 Aug.
Article
em En
| MEDLINE
| ID: mdl-18337010
ABSTRACT
An improved approach is introduced in damping measurement with atomic force microscope (AFM) for the in situ measurement of the offset phase shift needed for determining the intrinsic mechanical damping in nanoscale materials. The offset phase shift is defined and measured at a point of zero contact force according to the deflection part of the AFM force plot. It is shown that such defined offset phase shift is independent of the type of sample material, varied from hard to relatively soft materials in this study. This improved approach allows the self-calibrated and quantitative damping measurement with AFM. The ability of dynamic mechanical analysis for the measurement of damping in isolated one-dimensional nanostructures, e.g. individual multiwalled carbon nanotubes, was demonstrated.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Ultramicroscopy
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Estados Unidos