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Related Experiment Video

Updated: Mar 9, 2026

Mechano-Node-Pore Sensing: A Rapid, Label-Free Platform for Multi-Parameter Single-Cell Viscoelastic Measurements
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Finite Element Analysis of Single Cell Stiffness Measurements Using PZT-Integrated Buckling Nanoneedles.

Maryam Alsadat Rad1, Auwal Shehu Tijjani2, Mohd Ridzuan Ahmad3

  • 1Department of Control and Mechatronics Engineering, Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia. maryam.pd@utm.my.

Sensors (Basel, Switzerland)
|December 28, 2016
PubMed
Summary

This study introduces a novel PZT-integrated nanoneedle for real-time single cell stiffness measurement. This technique accurately assesses cell properties, aiding early disease diagnosis in Saccharomyces cerevisiae.

Keywords:
PZT-integratedbuckling nanoneedleglobal stiffnesslocal stiffnesssingle cell analysis

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Area of Science:

  • Biophysics
  • Materials Science
  • Nanotechnology

Background:

  • Accurate measurement of single cell mechanical properties is crucial for understanding cellular function and disease.
  • Existing techniques may lack the real-time, high-resolution capabilities needed for dynamic cellular analysis.

Purpose of the Study:

  • To develop and validate a novel PZT-integrated buckling nanoneedle for real-time single cell stiffness measurement.
  • To determine the mechanical properties (stiffness, Young's modulus, Poisson's ratio) of Saccharomyces cerevisiae cells under varying environmental conditions.
  • To explore the correlation between cell stiffness, environmental factors, and cellular vulnerability.

Main Methods:

  • Finite element modeling and validation of the PZT-integrated nanoneedle using ABAQUS software.
  • Calibration of the nanoneedle to determine its intrinsic mechanical properties.
  • Compression testing of Saccharomyces cerevisiae cells to establish baseline mechanical properties.
  • Integration of the nanoneedle with cells for local stiffness measurement under different environmental conditions.

Main Results:

  • The PZT-integrated nanoneedle demonstrated specific calibrated properties: stiffness (0.7100 N·m⁻¹), Young's modulus (123.4700 GPa), Poisson's ratio (0.3000), and sensitivity (0.0693 V·m·N⁻¹).
  • Average global stiffness and Young's modulus of Saccharomyces cerevisiae were determined as 10.8867 ± 0.0094 N·m⁻¹ and 110.7033 ± 0.0081 MPa, respectively.
  • Local stiffness and Young's modulus of Saccharomyces cerevisiae varied with environmental conditions, notably decreasing at low temperatures, increasing vulnerability to pathogens.

Conclusions:

  • The PZT-integrated buckling nanoneedle is a viable tool for precise, real-time measurement of single cell mechanical properties.
  • Reduced cell stiffness at low temperatures correlates with increased susceptibility to viral and bacterial infections.
  • This technique offers a rapid and accurate method for early-stage cellular disease diagnosis and potential therapeutic intervention.