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2 article(s) from Maharaj, Dave

Scale effects of nanomechanical properties and deformation behavior of Au nanoparticle and thin film using depth sensing nanoindentation

Dave Maharaj and
Bharat Bhushan

Beilstein J. Nanotechnol. 2014, 5, 822–836, doi:10.3762/bjnano.5.94

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Figure 1: Flowchart illustrating dislocation sources, in a grain, from the grain boundary and the grain inter...

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Figure 2: Illustration of the strain gradient plasticity theory in which high strain gradients occur at shall...

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Figure 3: Illustration of (a) Hall–Petch effect by the dislocation pile-up mechanism, where dislocations pile...

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Figure 4: SEM image of spherical Au nanoparticles approximately 500 nm in diameter which are referred to as A...

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Figure 5: TEM images showing (a) Au film (100 nm) (left) with a magnified view of the section highlighted by ...

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Figure 6: (a) Schematic showing method of deformation by using a Berkovich tip for nanoindentation (local def...

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Figure 7: (a) Mechanical properties of thin films with hardness and Young’s modulus as a function of contact ...

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Figure 8: (a) Typical load displacement indentation curve at a maximum load of 80 µN with vertical arrows sho...

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Figure 9: Load displacement curves for intermediate loads 500 µN and high loads 1000 µN for Au 500 with the v...

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Figure 10: (a) Typical load displacement compression curve at a maximum load of 80 µN for Au 500 with vertical...

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Figure 11: Load–displacement curves for intermediate loads 1000 µN and high loads 1500 µN with topography maps...

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Figure 12: Examples of repeat load–displacement curves for Au 500 nanoparticles with the corresponding maximum...

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Full Research Paper

Published 11 Jun 2014

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Effect of spherical Au nanoparticles on nanofriction and wear reduction in dry and liquid environments

Dave Maharaj and
Bharat Bhushan

Beilstein J. Nanotechnol. 2012, 3, 759–772, doi:10.3762/bjnano.3.85

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Figure 1: (a) Schematic of drug-carrying nanoparticles targeting cancer cells and releasing their therapeutic...

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Figure 2: Schematics of (a) a sharp tip pushing a particle in single-particle contact and (b) a glass sphere ...

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Figure 3: TEM images of spherical Au nanoparticles approximately (a) 30 nm in diameter and (b) 90 nm in diame...

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Figure 4: Topography map of Au 30 and Au 90 with corresponding histograms depicting the nanoparticle size dis...

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Figure 5: Two examples of topography maps and height profiles, at sections shown by the arrows, of Au 30 and ...

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Figure 6: (a) Topography maps and 2-D friction force profiles of Au (30 nm in diameter) and Au (90 nm in diam...

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Figure 7: Topography map of Au (90 nm in diameter) nanoparticle submerged in water. Imaging is performed by u...

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Figure 8: Friction force for Au 30 and Au 90 nanoparticles on the silicon substrate during manipulation, at n...

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Figure 9: (a) Friction force as a function of normal load and (b) coefficients of friction for both dry and i...

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Figure 10: Topography maps and 2-D profiles, at sections shown by the arrows, after sliding for 1, 10 and 100 ...

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Figure 11: (a) Optical micrographs of the wear scars taken after 500 cycles. (b) SEM micrograph of the wear sc...

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Full Research Paper

Published 15 Nov 2012

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