Mechanistic Approach for Long-Term Stability of a Polyethylene Glycol–Carbon Black Nanocomposite Sensor

Wenjun Li, Kazuki Nagashima, Takuro Hosomi, Chen Wang, Yosuke Hanai, Atsuo Nakao, Atsushi Shunori, Jiangyang Liu, Guozhu Zhang, Tsunaki Takahashi, Wataru Tanaka, Masaki Kanai, Takeshi Yanagida

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Polymer–carbon nanocomposite sensor is a promising molecular sensing device for electronic nose (e-nose) due to its printability, variety of polymer materials, and low operation temperature; however, the lack of stability in an air environment has been an inevitable issue. Here, we demonstrate a design concept for realizing long-term stability in a polyethylene glycol (PEG)–carbon black (CB) nanocomposite sensor by understanding the underlying phenomena that cause sensor degradation. Comparison of the sensing properties and infrared spectroscopy on the same device revealed that the oxidation-induced consumption of PEG is a crucial factor for the sensor degradation. According to the mechanism, we introduced an antioxidizing agent (i.e., ascorbic acid) into the PEG–CB nanocomposite sensor to suppress the PEG oxidation and successfully demonstrated the long-term stability of sensing properties under an air environment for 30 days, which had been difficult in conventional polymer–carbon nanocomposite sensors.

Original languageEnglish
Pages (from-to)151-158
Number of pages8
JournalACS sensors
Issue number1
Publication statusPublished - Jan 28 2022

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Instrumentation
  • Process Chemistry and Technology
  • Fluid Flow and Transfer Processes


Dive into the research topics of 'Mechanistic Approach for Long-Term Stability of a Polyethylene Glycol–Carbon Black Nanocomposite Sensor'. Together they form a unique fingerprint.

Cite this