Split-Ring-Shaped Biodegradable pH Sensor for Wireless and Battery-Free Monitoring of Agricultural Fields

Katsutoshi Hori, Ayaka Inami, Tetsuo Kan, Hiroaki Onoe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper describes a pH sensor for soil monitoring that is composed of fully biodegradable materials in the soil. Our biodegradable pH sensor is composed of only two key elements: One is a magnesium electromagnetic antenna that dissolves in water, and the other is a protection layer of hydroxyapatite that decomposes in response to pH. This sensor works as an electromagnetic split-ring resonator (metamaterial) that reflects electromagnetic waves with specific frequency in GHz band, enabling in wireless remote sensing without any electric circuits or batteries. We demonstrated wireless pH detection of soil for aiming to realize an environmentally friendly monitoring sensor that does not require collection after installation.

Original languageEnglish
Title of host publication21st International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages863-866
Number of pages4
ISBN (Electronic)9781665412674
DOIs
Publication statusPublished - 2021 Jun 20
Event21st International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2021 - Virtual, Online, United States
Duration: 2021 Jun 202021 Jun 25

Publication series

Name21st International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2021

Conference

Conference21st International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2021
Country/TerritoryUnited States
CityVirtual, Online
Period21/6/2021/6/25

Keywords

  • Biodegradable sensor device
  • Environment monitoring
  • pH
  • Wireless sensing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Control and Optimization
  • Instrumentation

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