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Inertial mass sensing with low Q-factor vibrating microcantilevers

S. Adhikari, Sondipon Adhikari

Journal of Applied Physics, Volume: 122, Issue: 14, Start page: 144304

Swansea University Author: Sondipon Adhikari

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DOI (Published version): 10.1063/1.4993678

Abstract

Mass sensing using micromechanical cantilever oscillators has been established as a promising approach. The scientific principle underpinning this technique is the shift in the resonance frequency caused by the additional mass in the dynamic system. This approach relies on the fact that the Q-factor...

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Published in: Journal of Applied Physics
ISSN: 1089-7550
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa36402
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last_indexed 2018-02-09T05:28:39Z
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spelling 2017-12-11T15:00:52.9749533 v2 36402 2017-10-30 Inertial mass sensing with low Q-factor vibrating microcantilevers 4ea84d67c4e414f5ccbd7593a40f04d3 Sondipon Adhikari Sondipon Adhikari true false 2017-10-30 FGSEN Mass sensing using micromechanical cantilever oscillators has been established as a promising approach. The scientific principle underpinning this technique is the shift in the resonance frequency caused by the additional mass in the dynamic system. This approach relies on the fact that the Q-factor of the underlying oscillator is high enough so that it does not significantly affect the resonance frequencies. We consider the case when the Q-factor is low to the extent that the effect of damping is prominent. It is shown that the mass sensing can be achieved using a shift in the damping factor. We prove that the shift in the damping factor is of the same order as that of the resonance frequency. Based on this crucial observation, three new approaches have been proposed, namely, (a) mass sensing using frequency shifts in the complex plane, (b) mass sensing from damped free vibration response in the time domain, and (c) mass sensing from the steady-state response in the frequency domain. Explicit closed-form expressions relating absorbed mass with changes in the measured dynamic properties have been derived. The rationale behind each new method has been explained using non-dimensional graphical illustrations. The new mass sensing approaches using damped dynamic characteristics can expand the current horizon of micromechanical sensing by incorporating a wide range of additional measurements. Journal Article Journal of Applied Physics 122 14 144304 1089-7550 Electrical properties, Oscillators, Sensors, Integral transforms, Group theory 31 12 2017 2017-12-31 10.1063/1.4993678 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2017-12-11T15:00:52.9749533 2017-10-30T09:15:39.1331108 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised S. Adhikari 1 Sondipon Adhikari 2 0036402-30102017095511.pdf adhikari2017(2).pdf 2017-10-30T09:55:11.0300000 Output 705472 application/pdf Accepted Manuscript true 2017-10-30T00:00:00.0000000 true eng
title Inertial mass sensing with low Q-factor vibrating microcantilevers
spellingShingle Inertial mass sensing with low Q-factor vibrating microcantilevers
Sondipon Adhikari
title_short Inertial mass sensing with low Q-factor vibrating microcantilevers
title_full Inertial mass sensing with low Q-factor vibrating microcantilevers
title_fullStr Inertial mass sensing with low Q-factor vibrating microcantilevers
title_full_unstemmed Inertial mass sensing with low Q-factor vibrating microcantilevers
title_sort Inertial mass sensing with low Q-factor vibrating microcantilevers
author_id_str_mv 4ea84d67c4e414f5ccbd7593a40f04d3
author_id_fullname_str_mv 4ea84d67c4e414f5ccbd7593a40f04d3_***_Sondipon Adhikari
author Sondipon Adhikari
author2 S. Adhikari
Sondipon Adhikari
format Journal article
container_title Journal of Applied Physics
container_volume 122
container_issue 14
container_start_page 144304
publishDate 2017
institution Swansea University
issn 1089-7550
doi_str_mv 10.1063/1.4993678
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 1
active_str 0
description Mass sensing using micromechanical cantilever oscillators has been established as a promising approach. The scientific principle underpinning this technique is the shift in the resonance frequency caused by the additional mass in the dynamic system. This approach relies on the fact that the Q-factor of the underlying oscillator is high enough so that it does not significantly affect the resonance frequencies. We consider the case when the Q-factor is low to the extent that the effect of damping is prominent. It is shown that the mass sensing can be achieved using a shift in the damping factor. We prove that the shift in the damping factor is of the same order as that of the resonance frequency. Based on this crucial observation, three new approaches have been proposed, namely, (a) mass sensing using frequency shifts in the complex plane, (b) mass sensing from damped free vibration response in the time domain, and (c) mass sensing from the steady-state response in the frequency domain. Explicit closed-form expressions relating absorbed mass with changes in the measured dynamic properties have been derived. The rationale behind each new method has been explained using non-dimensional graphical illustrations. The new mass sensing approaches using damped dynamic characteristics can expand the current horizon of micromechanical sensing by incorporating a wide range of additional measurements.
published_date 2017-12-31T03:45:31Z
_version_ 1763752156318400512
score 11.036706

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