Research Papers

Adhesion and Friction Coupling in Atomic Force Microscope-Based Nanopushing

[+] Author and Article Information
Fathi H. Ghorbel

Department of Mechanical Engineering and Materials Science,
Rice University,
Houston, TX 77005

James B. Dabney

Department of Systems Engineering,
University of Houston—Clear Lake,
Houston, TX 77058

1Corresponding author.

Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received December 7, 2009; final manuscript received February 21, 2012; published online October 30, 2012. Assoc. Editor: Nader Jalili.

J. Dyn. Sys., Meas., Control 135(1), 011002 (Oct 30, 2012) (6 pages) Paper No: DS-09-1341; doi: 10.1115/1.4006370 History: Received December 07, 2009; Revised February 21, 2012

The use of the atomic force microscope (AFM) as a tool to manipulate matter at the nanoscale has received a large amount of research interest in the last decade. Experimental and theoretical investigations have showed that the AFM cantilever can be used to push, cut, or pull nanosamples. However, AFM-based nanomanipulation suffers a lack of repeatability and controllability because of the complex mechanics in tip-sample interactions and the limitations in AFM visual sensing capabilities. In this paper, we will investigate the effects of the tip-sample interactions on nanopushing manipulation. We propose the use of an interaction model based on the Maugis–Dugdale contact mechanics. The efficacy of the proposed model to reproduce experimental observations is demonstrated via numerical simulations. In addition, the coupling between adhesion and friction at the nanoscale is analyzed.

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Fig. 1

AFM-based nanopushing manipulation

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Fig. 2

Domain of action of the adhesion force

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Fig. 3

Block diagram of the proposed nanomanipulation model

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Fig. 4

Relation between I¯c and Δ¯ for various λ

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Fig. 5

Effect of varying the tip radius on simulated FFM scans of the same sample (a) Rt=100×10-9m and (b) Rt=200×10-9m

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Fig. 6

Convolution effect (a) big tip radius and (b) small tip radius

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Fig. 7

Effect of adhesion on sample motion

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Fig. 8

Effect of adhesion on tip motion

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Fig. 9

Effect of adhesion on nanoscale friction

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Fig. 10

Effect of adhesion on the sticking positions of the sample

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Fig. 11

Microsliding phenomenon




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