NDLI: A control-based approach to indentation quantification in broadband and in-liquid nanomechanical measurement using atomic force microscope

Content Provider	IEEE Xplore Digital Library
Author	Juan Ren Qingze Zou
Copyright Year	2012
Description	Author affiliation: Mech. & Aerosp. Eng. Dept., Rutgers Univ., Piscataway, NJ, USA (Juan Ren; Qingze Zou)
Abstract	This paper presents a new control-based approach to achieve accurate indentation quantification in broadband and in-liquid nanomechanical property measurements using atomic force microscope (AFM). Accurate indentation measurement is fundamental to probe-based material property characterization as the force applied and the indentation generated are the fundamental physical variables that must be measured accurately. Large measurement errors, however, occur when the measurement frequency range becomes large (i.e., broadband), or the indentation is measured in liquid environment. Such significant measurement errors are generated due to the inability of the conventional method to account for the convolution of the instrument dynamics with the viscoelastic response of the soft sample, and the distributive hydrodynamic force effects as well as thermal drifts when measuring indentation in liquid. We propose a control-based approach to address these challenges and overcome the limits of the conventional method. The proposed approach is demonstrated through experiments of measuring the indentation measurements on a polydimethylsiloxane (PDMS) sample over a broadband of frequencies in air and with high-speed force load rate in liquid.
Sponsorship	IEEE Control Syst. Soc.
Starting Page	3234
Ending Page	3239
File Size	896394
Page Count	6
File Format	PDF
ISBN	9781457710957
ISSN	07431619
e-ISBN	9781457710964
e-ISBN	9781467321020
DOI	10.1109/ACC.2012.6315486
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-27
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	American Automatic Control Council(AACC)
Subject Keyword	Force Force measurement Frequency measurement Liquids Structural beams Broadband communication Hydrodynamics
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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