A Method of Evaluating Local Elasticity and Adhesion Energy from the Nonlinear Response of AFM Cantilever Vibrations.

Muraoka, Mikio; Arnold, W.

doi:10.1299/jsmea.44.396

Cited by 37 publications

(22 citation statements)

References 9 publications

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“…AFM approaches can be used, for example, for topography and stiffness imaging 2,3 to evaluate tribological properties of thin films, 4 force measurements, 5 and adhesion energy. 6 By modeling the tipsample interaction as two springs in series, the mechanical response of the sample can be determined from the contact portion of the resulting force curve. 7 Rosa-Zeiser et al 8 used the pulsed-force mode of the scanning force microscope to image elastic, electrostatic, and adhesive properties simultaneously with topography.…”

Section: Introductionmentioning

confidence: 99%

Contact-resonance atomic force microscopy for viscoelasticity

Yuya

Hurley

Turner

2008

Journal of Applied Physics

163

189

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We present a quantitative method for determining the viscoelastic properties of materials with nanometer spatial resolution. The approach is based on the atomic force acoustic microscopy technique that involves the resonant frequencies of the atomic force microscopy cantilever when its tip is in contact with a sample surface. We derive expressions for the viscoelastic properties of the sample in terms of the cantilever frequency response and damping loss. We demonstrate the approach by obtaining experimental values for the storage and loss moduli of a poly͑methyl methacrylate͒ film using a polystyrene sample as a reference material. Experimental techniques and system calibration methods to perform material property measurements are also presented.

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Section: Introductionmentioning

confidence: 99%

Contact-resonance atomic force microscopy for viscoelasticity

Yuya

Hurley

Turner

2008

Journal of Applied Physics

163

189

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“…Again, the modal sensitivity is expected to play a role in this complicated behavior. Such nonlinear softening has been experimentally observed [RAB99,MUR01]. Amplitude, p…”

Section: Nonlinear Flexural Vibrationsmentioning

confidence: 76%

Ultrasonic Studies of the Fundamental Mechanisms of Recrystallization and Sintering of Metals

Turner¹

2005

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ObjectivesThe purpose of this project was to develop a fundamental understanding of the interaction of an ultrasonic wave with complex media, with specific emphases on recrystallization and sintering of metals. A combined analytical, numerical, and experimental research program was implemented. Theoretical models of elastic wave propagation through these complex materials were developed using stochastic wave field techniques. The numerical simulations focused on finite element wave propagation solutions through complex media. The experimental efforts were focused on corroboration of the models developed and on the development of new experimental techniques. The analytical and numerical research allows the experimental results to be interpreted quantitatively. Alteration in Collaborative ArrangementIn fall 2002, the Ames Lab partner, Dr. James C. Foley, announced that he was leaving for another position at Los Alamos National Laboratory. Dr. R. Bruce Thompson has served as the primary contact for this collaboration since Dr. Foley departed. Accomplishments (Recrystallization)Analytical Modeling. Expressions for the ultrasonic attenuation in media with arbitrary texture have been developed using stochastic wave propagation theory. Initial attempts at deriving simple expressions for the attenuation were unsuccessful. Therefore, a modified technique was developed that relies slightly more on numerical calculations. The method is based on a generalized function of a single scalar variable σ that characterizes the state of texture. In this case the weighting function for the individual grains is given by ( ) with θ as the grain orientation angle. Thus, when σ → 0 all grains are aligned and the material is transversely isotropic at the macroscale. As σ → ∞, all grains are randomly oriented and the material is isotropic at the macroscale.In terms of attenuation, the covariance of the microstructure is the primary quantity needed for the calculation of attenuation. It is defined by in which both Eqs. (2) and (3) include the grain orientation distribution function F such that and are dependent on σ. Example results using Eq. (2) are shown in Fig. 1 for both the average elastic properties as well as quasilongitudinal slowness surfaces in terms of σ. The transition from transversely isotropy to complete isotropy is captured well using the grain orientation distribution function. Example results for attenuation are shown in Fig. 2. Again, the transition from transverse isotropy to complete isotropy is shown. Of particular note is the peak observed in the SH attenuation when σ is about 0.5. Such information may be useful for process monitoring. (a) (b)Progress was also made in the study of multiple scattering in slab geometries. These results have applications associated with heterogeneous bonding and interface layers. Two example results are shown in Fig. 3. The layer is insonified by a plane longitudinal wave. One question in the multiple scattering regime is associated with the applicability of the diffusion li...

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“…This may represent a difficulty, since it may force one to use complicated models or to perform experiments in a range where the linear approximation is valid. Nevertheless, it can turn out to be an advantage [29][30][31][32], as nonlinear effect can be used as the basis for the development of new A-SPM techniques as well as to extend the characterization capabilities of 'linear' A-SPM methods. In the following, we give a short overview of A-SPM techniqueslimiting our discussion to those described in this book-illustrating how they deal with nonlinearity.…”

Section: An Intimately Nonlinear Worldmentioning

confidence: 99%

Acoustic Scanning Probe Microscopy: An Overview

Passeri

Marinello

2012

Acoustic Scanning Probe Microscopy

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In this chapter, which serves as an introduction to the entire book, an overview is given of techniques resulting from the synergy between ultrasonic methods and scanning probe microscopy (SPM). Although other acoustic SPMs have been developed, those reviewed in this book are either the earliest proposed techniques, which are most widespread, extensively used, and continuously improved, or have been recently developed, but have been proved to be extremely promising. The techniques are briefly introduced, emphasizing what they have in common, their differences, their capabilities, and limitations.

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A Method of Evaluating Local Elasticity and Adhesion Energy from the Nonlinear Response of AFM Cantilever Vibrations.

Cited by 37 publications

References 9 publications

Contact-resonance atomic force microscopy for viscoelasticity

Contact-resonance atomic force microscopy for viscoelasticity

Ultrasonic Studies of the Fundamental Mechanisms of Recrystallization and Sintering of Metals

Acoustic Scanning Probe Microscopy: An Overview

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