NDLI: AFM-Based Nanomachining for Nano-Fabrication Processes: MD Simulation and AFM Experimental Verification

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Promyoo, Rapeepan El-Mounayri, Hazim Martini, Ashlie
Copyright Year	2010
Abstract	Recent developments in science and engineering have advanced the fabrication techniques for micro/nanodevices. Among them, the atomic force microscope (AFM) has already been used for nanomachining and nanofabrication such as nanolithography, nanowriting and nanopatterning. This paper describes the development and validation of computational models for AFM-based nanomachining (nanoindentation and nanoscratching). The Molecular Dynamics (MD) technique is used to model and simulate mechanical indentation and scratching at the nanoscale for the case of gold. The simulation allows for the prediction of indentation forces and the friction force at the interface between an indenter and a substrate. The effect of scratching speeds on indentation force and friction coefficient is investigated. The material deformation and indentation geometry are extracted based on the final locations of the atoms, which have been displaced by the rigid tool. In addition to the modeling, an AFM was used to conduct actual indentation at the nanoscale, and provide measurements to which the MD simulation predictions can be compared. The AFM provides resolution on the nanometer (lateral) and angstrom (vertical) scales. A three-sided pyramid indenter (with a radius of curvature ∼ 25 nm) is raster scanned on top of the surface and in contact with it. It can be observed from the MD simulation results that the indentation force increases as the depth of indentation increases, but decreases as the scratching speed increases. Moreover, the friction coefficient is found to be independent of scratching speed.
Sponsorship	Manufacturing Engineering Division
Starting Page	405
Ending Page	414
Page Count	10
File Format	PDF
ISBN	9780791849477
DOI	10.1115/MSEC2010-34115
e-ISBN	9780791838877
Volume Number	ASME 2010 International Manufacturing Science and Engineering Conference, Volume 2
Conference Proceedings	ASME 2010 International Manufacturing Science and Engineering Conference
Language	English
Publisher Date	2010-10-12
Publisher Place	Erie, Pennsylvania, USA
Access Restriction	Subscribed
Subject Keyword	Nanoscratching Nanomachining Molecular dynamics (md) Nanoindentation Atomic force microscopy Deformation Molecular dynamics Nanoscale phenomena Atoms Molecular dynamics simulation Nanolithography Modeling Geometry Nanofabrication Friction Simulation Manufacturing Resolution (optics)
Content Type	Text
Resource Type	Article

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