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Light-Controlled Configurable Colorimetric Sensing Array.

Jingjing Yu1, Xingcai Qin1, Di Wang2

  • 1State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , China.

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This study introduces a reusable, light-controlled colorimetric gas sensor array. By using light to activate individual sensing elements sequentially, the sensor can be reused multiple times, overcoming the limitations of single-use colorimetric sensors.

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Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Sensor Technology

Background:

  • Colorimetric gas sensing is a widely used technique but is often limited to single use.
  • Existing colorimetric sensors cannot be reset or reused after a single detection event.

Purpose of the Study:

  • To develop a novel, reusable colorimetric sensing array.
  • To enable on-demand activation and deactivation of sensing elements using light.
  • To create a configurable gas sensing platform with multiple uses.

Main Methods:

  • Development of a photoactivated colorimetric sensing array.
  • Utilizing light to control the on/off state of individual array elements.
  • Employing a smartphone screen as a programmable light source for array configuration.
  • Application to oxygen gas detection and analysis of sensor performance parameters.

Main Results:

  • Demonstrated a light-controlled, configurable colorimetric sensing array with multiple uses.
  • Showcased sequential activation of array elements for repeated sensing.
  • Established a relationship between sensitivity, noise, detection time, and array size for oxygen detection.
  • Configurable array size and element area using light control.

Conclusions:

  • The developed light-controlled colorimetric sensing array overcomes the single-use limitation of traditional platforms.
  • The sensor's reusability and configurable nature offer a versatile solution for gas detection.
  • The platform's performance can be optimized for specific applications by adjusting array parameters.