Printed ecoresorbable temperature sensors for environmental monitoring

Fumeaux, Nicolas; Kossairi, Melissa; Bourely, James; Briand, Danick

doi:10.1016/j.mne.2023.100218

Cited by 10 publications

(1 citation statement)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[27] Additionally, beeswax has been shown to be an effective barrier to humidity in air for electronic sensors operating at DC and radio frequency conditions. [28,29] Figure 1e shows a completed antenna encapsulated using beeswax.…”

Section: Introductionmentioning

confidence: 99%

Polycaprolactone‐Based Zinc Ink for High Conductivity Transient Printed Electronics and Antennas

Baumbauer,

Gopalakrishnan,

Atreya

et al. 2024

Adv Elect Materials

View full text Add to dashboard Cite

Distributed sensors and electronics can be used in agriculture to optimize crop management and improve environmental outcomes. Electronic devices in these outdoor spaces require medium to long range (>1m) wireless communication of data over several weeks or months, which in turn requires high conductivity (1 × 105 Sm−1) antennas. Printed bioinert or ecoresorbable conductors, comprising carbon, magnesium, or zinc fillers, typically exhibit conductivity on the order of 10–1000 Sm−1 and lifetimes from a few hours to a few days. A print‐based fabrication process for chemically treated zinc traces, which achieves conductivity of up to 6 × 105 Sm−1 is reported here. The ink formulation uses a non‐water‐soluble soil biodegradable polycaprolactone binder. The ink and printing processes reported here led to stable conductive traces that are used in ultra high frequency radio frequency identification (UHF‐RFID) folded dipole antennas operating at 915 MHz. The conductivity of the printed traces is maintained for over 70 days in ambient environments when traces are protected by a biodegradable beeswax encapsulation layer.

show abstract

Section: Introductionmentioning

confidence: 99%

Polycaprolactone‐Based Zinc Ink for High Conductivity Transient Printed Electronics and Antennas

Baumbauer,

Gopalakrishnan,

Atreya

et al. 2024

Adv Elect Materials

View full text Add to dashboard Cite

show abstract

Entirely Biodegradable Wireless pH Sensor with Split‐Ring Resonators for Soil pH Monitoring

Sakabe,

Kan,

Onoe

2024

Adv Materials Technologies

View full text Add to dashboard Cite

This paper describes a wireless and battery‐free soil pH sensor made entirely of degradable materials. Soil pH monitoring is significant for precision agriculture and environmental conservation because soil health can be estimated by measuring soil pH. Soil pH can be measured by collecting soil samples and analyzing them in a laboratory environment or by inserting an electrode‐type sensor into the soil and measuring soil pH on site. However, neither method is suitable for wide‐area soil pH sensing for precision agriculture or environmental conservation. Herein, a fully biodegradable wireless pH sensor is presented that can be dispersed to outdoor environment to detect soil acidity. The sensor is operated wirelessly through split‐ring resonators (SRRs) that consist of patterned octacalcium phosphate (OCP)‐coated magnesium (Mg) on a poly‐lactic acid (PLA) sheet. At acidic soil pH, the degradation of each SRR results in a change in the electromagnetic response of the sensor. The operation of the sensor in six different types of acidic soils is demonstrated to distinguish the acidic soil wirelessly. It is expected that the biodegradable sensor can be applied to low‐cost, easy‐to‐use, and environmentally friendly monitoring of soil pH.

show abstract

Degradable and Printed Microstrip Line for Chipless Temperature and Humidity Sensing

Bourely,

Kim,

Beyer

et al. 2024

Adv Elect Materials

View full text Add to dashboard Cite

Research on chipless and passive architectures for environmental sensing is generating high interest because they do not require any semiconductor components or batteries to operate, thus resulting in an eco‐friendlier footprint. This study demonstrates a printed microstrip line with multiple resonators using biodegradable materials to continuously monitor temperature and relative humidity (RH). Constructed with a paper substrate and printed zinc conductive lines, and encapsulated with beeswax to protect against the interference of humidity, the microstrip line integrates spiral‐shaped resonators. One resonator operates at 1.2 GHz for temperature sensing, while another, coated with konjac glucomannan serves for relative humidity sensing at 2 GHz. The multi‐resonating features allow for a simultaneous assessment of temperature and humidity. The microstrip line displays a linear sensitivity to temperature of −1.35 MHz °C−1 and a non‐linear relative humidity sensitivity ranging between −0.8 and −8 MHz/%RH from 30% to 70% RH. Its degradation in a lab‐made compost for 70 days shows the removal of the transducing layer in 7 days and degradation of the cellulosic substrate starting after 5 weeks. The developed environmental sensing devices are notably promising for future applications in smart packaging and the tracking of goods aiming at the minimization of electronic waste.

show abstract

Printed ecoresorbable temperature sensors for environmental monitoring

Cited by 10 publications

References 46 publications

Polycaprolactone‐Based Zinc Ink for High Conductivity Transient Printed Electronics and Antennas

Polycaprolactone‐Based Zinc Ink for High Conductivity Transient Printed Electronics and Antennas

Entirely Biodegradable Wireless pH Sensor with Split‐Ring Resonators for Soil pH Monitoring

Degradable and Printed Microstrip Line for Chipless Temperature and Humidity Sensing

Contact Info

Product

Resources

About