Field Deployment of A Nanogap Gas Sensor For Crop Damage Detection

Abstract

This paper reports the first in-field detection of actual hexanal from the damaged sorghums using the field-deployed nano-gap gas sensor. The previously developed nano-gap gas sensor was fully integrated with electronics and wireless communication units into a portable prototype (10×10× 7 c m3). The field deployed gas sensor prototype successfully detected the 'scream‘ from the mechanically damaged sorghums by detecting a particular gas molecule, hexanal, released after the time point of 3.5 hours since the start of leaf cutting. The sensor prototype was pre-programmed to detect >100 ppm concentrations of hexanal in ambient air. After 1.5 hours since the cutting was stopped, the sensor prototype successfully recovered. The sorghum field testing conditions included a temperature (25~120 °C) and humidity (≤70%RH). The detection demonstration clearly indicated that (1) a prototype successfully captured actual hexanal released from the damaged sorghums real-time and that (2) it was feasible to monitor a mechanically-stressed status of sorghums by gas monitoring.

Plant phenotyping relevance

損傷ソルガムの揮発性ガスを検出して機械的ストレス状態をモニタリングするセンサーの試作・フィールド実証が中心であり、植物状態の取得方法に該当する。

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