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Topic Area: Nanomechanics

Displaying records 11 to 19.
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11. Structure-property relationships for methyl-terminated alkyl self-assembled monolayers
Topic: Nanomechanics
Published: 7/20/2011
Authors: Frank W DelRio, Dave Rampulla, Cherno Jaye, Gheorghe Stan, Richard Swift Gates, Daniel A Fischer, Robert Francis Cook
Abstract: Structure-property relationships for methyl-terminated alkyl self-assembled monolayers (SAMs) are developed using near-edge X-ray absorption fine structure spectroscopy (NEXAFS) and atomic force microscopy (AFM). NEXAFS C K-edge spectra are used to ...

Topic: Nanomechanics
Published: 6/5/2011
Authors: Houxun H. Miao, Kartik A Srinivasan, Matthew T. Rakher, Marcelo Ishihara Davanco, Vladimir A Aksyuk
Abstract: We report a novel type of fully integrated optomechanical sensor and demonstrate high sensitivity mechanical displacement measurements on chip. We sense the motion of micro and nano-mechanical devices by near field coupling them to high quality facto ...

13. Analysis of high-Q, gallium nitride nanowire resonators in response to deposited thin films
Topic: Nanomechanics
Published: 1/1/2011
Authors: J. R. Montague, M. Dalberth, J. M. Gray, D. Seghete, Kristine A Bertness, S M George, Victor M. Bright, C. T. Rogers, Norman A Sanford
Abstract: Gallium nitride nanowires (GaN-NWs) are systems of interest for mechanical resonance-based sensors due to their small mass and, in the case of c-axis NWs, high mechanical quality (Q) factors of 10,000‹100,000. We report on singly-clamped NW mechanic ...

14. Thickness effect on the viscoelastic properties of polystyrene thin films as measured by thermal wrinkling
Topic: Nanomechanics
Published: 12/29/2010
Authors: Edwin P Chan, Santanu S. Kundu, Qinhuang Lin, Christopher M Stafford
Abstract: The viscoelastic properties of polymer thin films can have a significant impact on the performance in many small-scale devices. In this work, we use thermal wrinkling, which is a phenomenon based on a thermally-initiated instability, to measure visco ...

15. High-Frequency Nanofluidics: A Universal Formulation of the Fluid Dynamics of MEMS and NEMS
Topic: Nanomechanics
Published: 9/23/2010
Authors: Kamil L. Ekinci, V. Yakhot, Sukumar Rajauria, C. Colosqui, D. M. Karabacak
Abstract: A solid body undergoing oscillatory motion in a fluid generates an oscillating flow. Oscillating flows in Newtonian fluids were first treated by G.G. Stokes in 1851. Since then, this problem has attracted much attention, mostly due to its technologic ...

16. Measurement of residual stress field anisotropy at indentations in silicon
Topic: Nanomechanics
Published: 6/23/2010
Authors: Yvonne Beatrice Gerbig, Stephan J Stranick, Robert Francis Cook
Abstract: The residual stress field around spherical indentations on single crystal silicon (Si) of different crystallographic orientation is mapped by confocal Raman microscopy. All orientations exhibit an anisotropic stress pattern with an orientation spec ...

17. Cleaning of diamond nanoindentation probes with oxygen plasma and carbon dioxide snow
Topic: Nanomechanics
Published: 12/7/2009
Author: Dylan Morris
Abstract: Diamond nanoindentation probes may perform many thousands of indentations over years of service life. There is general agreement that the probes need frequent cleaning, but techniques for doing so are mostly anecdotes shared between experimentalists. ...

18. Dislocation nucleation and multiplication in small volumes: the onset of plasticity during indentation testing
Topic: Nanomechanics
Published: 3/9/2009
Authors: Dylan Morris, David Bahr, Stefhanni Jennerjohn
Abstract: While classical studies of dislocation behavior have focused on the motion and multiplication of dislocations, recent advances in experimental methods allow studies that probe relatively dislocation-free volumes of materials. When the dislocation co ...

19. Prediction of Elastic Properties of Heterogeneous Materials With Complex Microstructures
Topic: Nanomechanics
Published: 1/1/2007
Authors: Yong Ni, Martin Y Chiang
Abstract: A homogenization method combining the Eshelby equivalent eigenstrain approach and the phase-field microelasticity for numerically solving the eigenstrain, is developed to predict all the effective elastic constants of three-dimensional heterogeneous ...

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