Lateral stiffness: A new nanomechanical measurement for the determination of shear strengths with friction force microscopy

The Young's modulus of ZnO nanobelts was measured with an atomic force microscope by means of the modulated nanoindentation method. The elastic modulus was found to depend strongly on the width-to-thickness ratio of the nanobelt, decreasing from about 100 to 10 GPa, as the width-to-thickness ratio increases from 1.2 to 10.3. This surprising behavior is explained by a growth-direction-dependent aspect ratio and the presence of stacking faults in nanobelts growing along particular directions.

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“…8,19 The indentation depth z is obtained by integrating k contact obtained at different values F′ of the normal force:…”

Section: ∂F/∂dmentioning

confidence: 99%

Aspect Ratio Dependence of the Elastic Properties of ZnO Nanobelts

et al. 2007

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“…Numerous experimental characterizations of the physical properties of nanoscale contacts have been performed by means of nanoindentation, [1][2][3][4] atomic force microscopy [5][6][7][8] and scanning tunneling microscopy ͑STM͒. 9,10 More recently, it has become recognized that a probe tip-quartz crystal microbalance ͑QCM͒ [11][12][13][14][15][16][17][18][19][20] or closely related geometries 21 could also have enormous potential as a sensitive probe of interfacial physical properties.…”

Section: Introductionmentioning

confidence: 99%

Measuring nanomechanical properties of a dynamic contact using an indenter probe and quartz crystal microbalance

Borovsky

Krim

Asif

et al. 2001

Journal of Applied Physics

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A study of the contact mechanics of a probe tip interacting with a quartz crystal microbalance ͑QCM͒ has been performed, involving simultaneous measurements of normal load, displacement, and contact stiffness with changes in QCM resonant frequency. For metal-metal and glass-metal contacts in air, the QCM frequency shifts were observed to be positive, and directly proportional to the contact area as inferred from the contact stiffness. Interfacial characteristics of the probe-tip contact ͑elasticity, contact size, and an estimate of the number of contacting asperities͒ were deduced by extending a prior model of single asperity contact to the case of multiple contacts. The extended model clarifies a number of seemingly disparate experimental results that have been reported in the literature.

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“…Unfortunately, during a friction force experiment contributions from the contact area and from the shear strength, are convoluted. 9,10 This is one of the reasons why even in wearless and single asperity contact experiments it is not trivial to relate friction forces to the Young modulus of the material investigated. 5 In this letter, we study sliding friction forces between a Si AFM tip and diamond, diamond-like carbon ͑DLC͒, and CrN thin films, i.e., materials used in industry as hard coatings.…”

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confidence: 99%

Young modulus dependence of nanoscopic friction coefficient in hard coatings

Brune¹

2003

Applied Physics Letters

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We present an atomic force microscope study of nanoscopic sliding friction on diamond, diamond-like carbon, and on three CrN thin films with varying hardness obtained by different growth temperatures. For the CrN films, we show that the changes in the friction coefficient can be traced back to variations of the Young modulus. More generally, we show for all samples investigated and in wearless regime, that the nanoscopic friction coefficient is directly linked to the Young modulus.

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Lateral stiffness: A new nanomechanical measurement for the determination of shear strengths with friction force microscopy

Abstract: Carpick, Robert W.; Ogletree, D. F.; and Salmeron, Miguel, "Lateral stiffness: A new nanomechanical measurement for the determination of shear strengths with friction force microscopy" (1997). Departmental Papers (MEAM). 95.

Cited by 409 publications

References 22 publications

Aspect Ratio Dependence of the Elastic Properties of ZnO Nanobelts

Aspect Ratio Dependence of the Elastic Properties of ZnO Nanobelts

Measuring nanomechanical properties of a dynamic contact using an indenter probe and quartz crystal microbalance

Young modulus dependence of nanoscopic friction coefficient in hard coatings

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