High resolution viscosity measurement by thermal noise detection

Felipe Aguilar Sandoval; Manuel Sepúlveda; Ludovic Bellon; Francisco Melo

doi:10.3390/s151127905

High resolution viscosity measurement by thermal noise detection

Felipe Aguilar Sandoval
, Manuel Sepúlveda
, Ludovic Bellon
, Francisco Melo

Research output: Contribution to journal › Article › peer-review

Abstract

An interferometric method is implemented in order to accurately assess the thermal fluctuations of a micro-cantilever sensor in liquid environments. The power spectrum density (PSD) of thermal fluctuations together with Sader’s model of the cantilever allow for the indirect measurement of the liquid viscosity with good accuracy. The good quality of the deflection signal and the characteristic low noise of the instrument allow for the detection and corrections of drawbacks due to both the cantilever shape irregularities and the uncertainties on the position of the laser spot at the fluctuating end of the cantilever. Variation of viscosity below 0:03mPa s was detected with the alternative to achieve measurements with a volume as low as 50 μL.

Original language	English
Pages (from-to)	27905-27916
Number of pages	12
Journal	Sensors (Switzerland)
Volume	15
Issue number	11
DOIs	https://doi.org/10.3390/s151127905
Publication status	Published - 3 Nov 2015
Externally published	Yes

Keywords

MEMS
Thermal fluctuations
Viscosity in liquids

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10.3390/s151127905

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title = "High resolution viscosity measurement by thermal noise detection",

abstract = "An interferometric method is implemented in order to accurately assess the thermal fluctuations of a micro-cantilever sensor in liquid environments. The power spectrum density (PSD) of thermal fluctuations together with Sader{\textquoteright}s model of the cantilever allow for the indirect measurement of the liquid viscosity with good accuracy. The good quality of the deflection signal and the characteristic low noise of the instrument allow for the detection and corrections of drawbacks due to both the cantilever shape irregularities and the uncertainties on the position of the laser spot at the fluctuating end of the cantilever. Variation of viscosity below 0:03mPa s was detected with the alternative to achieve measurements with a volume as low as 50 μL.",

keywords = "MEMS, Thermal fluctuations, Viscosity in liquids",

author = "Sandoval, \{Felipe Aguilar\} and Manuel Sep{\'u}lveda and Ludovic Bellon and Francisco Melo",

note = "Publisher Copyright: {\textcopyright} 2015 by the authors; licensee MDPI, Basel, Switzerland.",

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doi = "10.3390/s151127905",

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AU - Sandoval, Felipe Aguilar

AU - Sepúlveda, Manuel

AU - Bellon, Ludovic

AU - Melo, Francisco

PY - 2015/11/3

Y1 - 2015/11/3

N2 - An interferometric method is implemented in order to accurately assess the thermal fluctuations of a micro-cantilever sensor in liquid environments. The power spectrum density (PSD) of thermal fluctuations together with Sader’s model of the cantilever allow for the indirect measurement of the liquid viscosity with good accuracy. The good quality of the deflection signal and the characteristic low noise of the instrument allow for the detection and corrections of drawbacks due to both the cantilever shape irregularities and the uncertainties on the position of the laser spot at the fluctuating end of the cantilever. Variation of viscosity below 0:03mPa s was detected with the alternative to achieve measurements with a volume as low as 50 μL.

AB - An interferometric method is implemented in order to accurately assess the thermal fluctuations of a micro-cantilever sensor in liquid environments. The power spectrum density (PSD) of thermal fluctuations together with Sader’s model of the cantilever allow for the indirect measurement of the liquid viscosity with good accuracy. The good quality of the deflection signal and the characteristic low noise of the instrument allow for the detection and corrections of drawbacks due to both the cantilever shape irregularities and the uncertainties on the position of the laser spot at the fluctuating end of the cantilever. Variation of viscosity below 0:03mPa s was detected with the alternative to achieve measurements with a volume as low as 50 μL.

KW - MEMS

KW - Thermal fluctuations

KW - Viscosity in liquids

UR - https://www.scopus.com/pages/publications/84946594586

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DO - 10.3390/s151127905

M3 - Article

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AN - SCOPUS:84946594586

SN - 1424-8220

VL - 15

SP - 27905

EP - 27916

JO - Sensors (Switzerland)

JF - Sensors (Switzerland)

IS - 11

ER -

High resolution viscosity measurement by thermal noise detection

Abstract

Keywords

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