Tristan Hand, Lyndsay Kissell, and Pietro Strobbia<br/>Cincinnati State<br/>University of Cincinnati<br/>Food production is strongly affected by pests and contaminants. Current methods for the detection of pests and contaminants are slow and inefficient. In this work, we propose a solution for in-situ analysis of agriculturally relevant targets, developing a hydrogel biosensor that uses surface-enhanced Raman scattering (SERS) and can be used directly in the field.<br/>While we developed this technology, we noticed that the control of the distribution of biosensors in the hydrogel was causing high variance in the sensor response. In my work, I studied the inclusion of an internal standard in our hydrogels. The internal standard was made to mimic our sensor and is composed of plasmonic nanoparticles coated with a specific Raman reporter. We can use the internal standard mixed with the sensors to control biosensor distribution.

SERS sensors for environmental analysis

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