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Related Experiment Video

Updated: Jul 14, 2026

Electroantennography-based Bio-hybrid Odor-detecting Drone using Silkmoth Antennae for Odor Source Localization
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Electroantennography-based Bio-hybrid Odor-detecting Drone using Silkmoth Antennae for Odor Source Localization

Published on: August 27, 2021

Graphene Nanosensor for the Detection of Small Organic Compounds Using an Insect Olfactory Receptor.

Deependra Kumar Ban1, Alicia Contet2, Michael Catania3

  • 1Shu Chien-Gene Lay Department of Bioengineering, Jacobs School of Engineering Department of Bioengineering, University of California, San Diego, California, USA.

Advanced Materials (Deerfield Beach, Fla.)
|July 13, 2026
PubMed
Summary

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Researchers integrated insect odorant receptors onto graphene sensors for highly selective chemical detection. This novel biosensor shows promise for advanced applications in diagnostics and biosurveillance.

Area of Science:

  • Biomolecular Engineering
  • Nanotechnology
  • Chemical Sensing

Background:

  • Insect olfactory receptors offer high selectivity for diverse chemicals.
  • Graphene field-effect transistors (gFETs) provide sensitive, label-free detection platforms.
  • Integrating biological receptors with electronic sensors is key for next-generation devices.

Purpose of the Study:

  • To develop a novel biosensor by directly integrating the insect odorant receptor MhOR5 with a gFET.
  • To achieve selective, label-free detection of small organic compounds (SOCs).
  • To evaluate the sensor's performance, selectivity, and stability.

Main Methods:

  • Large-scale production and stabilization of the MhOR5 protein.
  • Fabrication and quality control of wafer-scale graphene field-effect transistors (gFETs).
Keywords:
MhOR5field effect transistorgraphenesmall organic compoundssynthetic biology

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  • Functionalization of gFETs with MhOR5 and testing against sixteen diverse SOCs.

    • Main Results:

    • The MhOR5-gFET biosensor demonstrated concentration-dependent responses to various SOCs.
    • High affinity was observed for acetophenone, with lower affinity for sulcatone.
    • The sensor successfully distinguished between structural isomers like eugenol and isoeugenol.

    Conclusions:

    • The MhOR5-gFET biosensor represents a successful integration of insect olfactory receptors and graphene technology.
    • This modular platform offers high sensitivity and molecular selectivity for SOC detection.
    • Potential applications include biotechnology, diagnostics, and biosurveillance.