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Updated: Jun 15, 2026

Mechano-Node-Pore Sensing: A Rapid, Label-Free Platform for Multi-Parameter Single-Cell Viscoelastic Measurements

Mechano-Node-Pore Sensing: A Rapid, Label-Free Platform for Multi-Parameter Single-Cell Viscoelastic Measurements

Published on: December 2, 2022

MEMS fluid viscosity sensor.

Arthur Ballato¹

¹US Army Communications-Electronics RDEC, Fort Monmouth, NJ, USA. a.ballato@ieee.org

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|March 10, 2010

Summary

This summary is machine-generated.

This study introduces a novel method using quartz shear resonators to separately measure liquid viscosity and density. By confining the fluid to a depth comparable to the resonator

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Area of Science:

Physics
Materials Science
Chemical Engineering

Background:

Quartz shear resonators are widely used for measuring fluid properties.
Current methods using these resonators can determine the mass density-shear viscosity product but not individual values.
Existing techniques involve exposing the resonator to a fluid bath much larger than the shear mode penetration depth.

Purpose of the Study:

To propose a novel method for separately determining viscosity and mass density of fluids.
To explore fluid confinement effects on resonator perturbation for enhanced sensing capabilities.
To enable the development of miniaturized viscometers and fluid sensors.

Main Methods:

Review of past techniques and current state-of-the-art in resonator-based fluid sensing.
Proposal of a new method involving fluid confinement near the resonator surface, within the penetration depth of the shear mode.
Theoretical analysis limited to an idealized one-dimensional problem to highlight key principles.

Main Results:

When fluid confinement is on the order of the shear mode penetration depth, resonator perturbation becomes highly sensitive to the separation distance.
This sensitivity allows for the separate and unique determination of both viscosity and mass density.
The method naturally leads to extreme miniaturization due to the micrometer-scale penetration depths.

Conclusions:

The proposed method overcomes limitations of existing techniques, enabling independent measurement of viscosity and density.
This approach paves the way for micro-electro-mechanical (MEMS) viscometers and advanced fluid sensors.
The ability to miniaturize sensors is a significant advantage for various applications.