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Method for fabricating self-powered cement sensors based on gold nanoparticles.

Daniel A Triana-Camacho1, Rogelio Ospina-Ospina1, Jorge H Quintero-Orozco1

  • 1Escuela de Física, Universidad Industrial de Santander, Cra 27 Calle 9, Bucaramanga, Colombia.

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Summary

Researchers developed self-powered piezoelectric cement sensors by adding gold nanoparticles and applying an electric field during curing. This innovation enhances cement-based composites for intelligent, sustainable civil structures.

Keywords:
Cement-based compositesGold nanoparticlesPiezoelectric properties for cement-based gold nanoparticlesPiezoelectricityPulsed laser ablation in liquid

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Civil Engineering

Background:

  • Development of intelligent and sustainable civil structures requires advanced materials.
  • Cement-based sensors offer potential for self-powered, self-healing, and self-monitoring applications.
  • Nanocomposites are key to enhancing cementitious material properties.

Purpose of the Study:

  • To develop a methodology for creating piezoelectric cement sensors.
  • To enhance the piezoelectric properties of cement-based composites for strain-sensing applications.
  • To create self-powered sensors that do not require external power sources.

Main Methods:

  • Fabrication of cement sensors using gold nanoparticles (Au NPs) synthesized via pulsed laser ablation.
  • Optimization of Au NP concentrations (442 ppm and 658 ppm) by adjusting ablation time.
  • Curing of cement sensors under a constant electric field, followed by oven drying.
  • Characterization using electrical impedance spectroscopy and open circuit potential measurements under compressive strength.

Main Results:

  • Pulsed laser ablation parameters, specifically ablation time, influence Au NP size and quantity.
  • Optimal concentrations of Au NPs significantly increase the inherent piezoelectricity of cement paste.
  • A direct correlation was observed between electrical response and mechanical loading, confirming piezoelectric behavior.

Conclusions:

  • The methodology successfully produced piezoelectric cement sensors with enhanced properties.
  • Gold nanoparticles and electric field curing are effective in boosting cement's piezoelectric response.
  • These self-powered sensors are suitable for strain-sensing in civil infrastructure monitoring.