Design and control of tapping mode atomic force microscope in liquid utilizing optical pickup system

Wan Lin Hu; Shao-Kang Hung; Shih Hsun Yen; Li Chen Fu

doi:10.1109/ICCAS.2008.4694604

Design and control of tapping mode atomic force microscope in liquid utilizing optical pickup system

Wan Lin Hu, Shao-Kang Hung, Shih Hsun Yen, Li Chen Fu

Department of Mechanical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In this work, we propose a fluid tapping mode atomic force microscopy (AFM) implemented by a DVD pickup head. The use of DVD pickup head minimizes the volume of the hardware system, and thus reduces the measurement error caused by heat expansion. In order to realize the system mentioned above, we design a Q-controller to modulate the interaction force between the tip and the sample. Increasing the quality factor will overcome the problem with high damping ratio in the fluid which makes the probe hard to oscillate. Because of the reduction of the tip-sample force, the sample surface will not be hurt by the tip. Therefore, we can use the AFM to scan soft sample, and obtain more realistic topography. Traditionally, people use proportion-integration controller to control the system. Users need to tune this kind of controller manually, and hence the quality of the scan images is highly related to users' experiences. To overcome this problem, we design an adaptive sliding-mode controller to improve the scanning capability and robustness.For testing the system capability, we will have a series of numerical simulations.

Original language	English
Title of host publication	Proceedings of 2009 7th Asian Control Conference, ASCC 2009
Pages	15-20
Number of pages	6
DOIs	https://doi.org/10.1109/ICCAS.2008.4694604
State	Published - 14 Dec 2009
Event	2009 7th Asian Control Conference, ASCC 2009 - Hong Kong, China Duration: 27 Aug 2009 → 29 Aug 2009

Publication series

Name	Proceedings of 2009 7th Asian Control Conference, ASCC 2009

Conference

Conference	2009 7th Asian Control Conference, ASCC 2009
Country	China
City	Hong Kong
Period	27/08/09 → 29/08/09

Access to Document

10.1109/ICCAS.2008.4694604

Link to publication in Scopus

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title = "Design and control of tapping mode atomic force microscope in liquid utilizing optical pickup system",

abstract = "In this work, we propose a fluid tapping mode atomic force microscopy (AFM) implemented by a DVD pickup head. The use of DVD pickup head minimizes the volume of the hardware system, and thus reduces the measurement error caused by heat expansion. In order to realize the system mentioned above, we design a Q-controller to modulate the interaction force between the tip and the sample. Increasing the quality factor will overcome the problem with high damping ratio in the fluid which makes the probe hard to oscillate. Because of the reduction of the tip-sample force, the sample surface will not be hurt by the tip. Therefore, we can use the AFM to scan soft sample, and obtain more realistic topography. Traditionally, people use proportion-integration controller to control the system. Users need to tune this kind of controller manually, and hence the quality of the scan images is highly related to users' experiences. To overcome this problem, we design an adaptive sliding-mode controller to improve the scanning capability and robustness.For testing the system capability, we will have a series of numerical simulations.",

author = "Hu, {Wan Lin} and Shao-Kang Hung and Yen, {Shih Hsun} and Fu, {Li Chen}",

year = "2009",

month = dec,

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series = "Proceedings of 2009 7th Asian Control Conference, ASCC 2009",

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booktitle = "Proceedings of 2009 7th Asian Control Conference, ASCC 2009",

note = "null ; Conference date: 27-08-2009 Through 29-08-2009",

}

Hu, WL, Hung, S-K, Yen, SH & Fu, LC 2009, Design and control of tapping mode atomic force microscope in liquid utilizing optical pickup system. in Proceedings of 2009 7th Asian Control Conference, ASCC 2009., 5276309, Proceedings of 2009 7th Asian Control Conference, ASCC 2009, pp. 15-20, 2009 7th Asian Control Conference, ASCC 2009, Hong Kong, China, 27/08/09. https://doi.org/10.1109/ICCAS.2008.4694604

Design and control of tapping mode atomic force microscope in liquid utilizing optical pickup system. / Hu, Wan Lin; Hung, Shao-Kang; Yen, Shih Hsun; Fu, Li Chen.

Proceedings of 2009 7th Asian Control Conference, ASCC 2009. 2009. p. 15-20 5276309 (Proceedings of 2009 7th Asian Control Conference, ASCC 2009).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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