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Keywords:

  • optical sensors;
  • holography;
  • lasers;
  • hydrogels;
  • nanoparticles
Thumbnail image of graphical abstract

This tunable holographic sensor offers interrogation and a reporting transducer as well as an analyte-responsive hydrogel, rendering it label-free and reusable. A single 6 ns laser pulse is used to fabricate holographic sensors consisting of silver nanoparticles arranged periodically within a polymer film. The tunability of the sensor is demonstrated through pH sensing of artificial urine and validated through computational modeling.