Quantum Sensors in the Field: A Critical Review of Emerging Roles for Exciton-Based and Quantum-Dot Technologies in Satellite-Integrated Precision Agriculture
Ing. José Antonio Valles Romero *
Engineering and Technology, National Technological Institute of Mexico, Mexico.
Gerardo Manuel Alonzo Medina
Engineering and Technology, University of the Incarnate Word, United States.
Emilio Raymundo Morales Maldonado
Sustainable Agricultural Development, National Researcher, National Technological Institute of Mexico, Mexico.
Germán Cuaya Simbro
Engineering and Technology, University of the Incarnate Word, United States.
*Author to whom correspondence should be addressed.
Abstract
Precision agriculture increasingly depends on sensing systems that span twelve orders of magnitude in spatial scale, from molecular recognition events at a root surface to orbital observations of a cropping region. Two research communities have converged on this problem from opposite directions. Materials scientists have engineered excitonic transducers, principally colloidal quantum dots, carbon dots, semiconducting single-walled carbon nanotubes and monolayer transition metal dichalcogenides, into optical reporters for agrochemicals, nutrients and plant stress. Quantum physicists and instrument designers have developed photon-counting detectors, computational spectrometers, matter-wave gravimeters and satellite quantum key distribution links that are now entering or approaching orbital service. The two literatures rarely address one another, and the phrase quantum sensing is applied inconsistently across them. This review evaluates what the accessible evidence supports about the agricultural utility of exciton-based and quantum-dot technologies when they are considered as components of a satellite-integrated observation system rather than as isolated laboratory devices. Evidence was drawn from scholarly indexes searched to 14 June 2026, appraised for methodological adequacy, and synthesised thematically around four problems: terminological boundaries, ground-level transduction, orbital and airborne instrumentation, and cross-scale integration. The evidence is strongest for detector-level contributions, where quantum-dot photodetectors and reconstructive spectrometers demonstrably relax the size, mass and cost constraints that limit spectral resolution on small satellite platforms, and for photon-counting altimetry, which has an operational orbital record. It is weakest for in-field excitonic biosensors, where reported detection limits derive overwhelmingly from spiked laboratory matrices, comparison against reference analytical chemistry is uncommon, and environmental persistence and regulatory questions remain unresolved. Claims that nanoscale excitonic sensors will supply calibration or validation data for satellite retrievals are mechanistically plausible but empirically unsupported, and no reviewed study demonstrated a closed measurement chain from an excitonic ground sensor to a satellite-derived agronomic decision. Research priorities are proposed that address matrix-realistic validation, uncertainty propagation across scales, radiometric traceability and deployment equity.
Keywords: Quantum dots, excitonic sensors, precision agriculture, satellite remote sensing, Single-photon detection, imaging spectroscopy, sensor calibration and validation