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One-Dimensional ZnO/Gold Junction for Simultaneous and Versatile Multisensing Measurements.

Beatrice Miccoli1, Valentina Cauda2,3, Alberto Bonanno2

  • 1Department of Electronics and Telecommunication, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino 10129, Italy.

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|July 14, 2016
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Summary

This study introduces a novel zinc oxide microwire sensor capable of simultaneously detecting UV-VIS light, temperature, and pH. This multi-sensing capability offers versatile real-time measurements for applications like cell culture monitoring.

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Area of Science:

  • Materials Science and Engineering
  • Nanotechnology
  • Chemical Sensing

Background:

  • Zinc oxide (ZnO) nano/micro-structures are extensively researched for sensor fabrication.
  • The multi-sensing potential of ZnO has been underexplored despite its widespread use in advanced sensors.

Purpose of the Study:

  • To develop an efficient multi-sensor utilizing a single zinc oxide microwire/gold junction.
  • To demonstrate real-time detection of UV-VIS light, temperature, and pH variations using a single device.

Main Methods:

  • Fabrication of a ZnO microwire/gold junction device.
  • Leveraging ZnO's photoconductive, pyroelectric, and surface functionalization properties for sensing.
  • Development of a mathematical tool and design of experiments (DoE) for performance prediction.

Main Results:

  • The single ZnO microwire/gold junction device successfully detected UV-VIS light, temperature, and pH.
  • Simultaneous or sequential/random detection of multiple stimuli was achieved.
  • Reliable and versatile real-time measurements were demonstrated.

Conclusions:

  • The developed micro-device offers efficient multi-sensing capabilities.
  • The sensor shows significant potential for applications in sensing for living cell cultures.
  • This work highlights the underappreciated multi-sensing abilities of zinc oxide structures.