Acetone Gas Sensor Based on SWCNT/Polypyrrole/Phenyllactic Acid Nanocomposite with High Sensitivity and Humidity Stability

Biosensors

Sungmin Kang¹  Jin-Yeol Kim²  Ji-Sun Kim²  Hyo-Kyung Kang²  Jun-Ho Byeon² 

[1] Head Office Laboratory, LG Japan Lab Inc., Tokyo 140-0002, Japan;School of Advanced Materials Engineering, Kookmin University, Seoul 136-702, Korea;

关键词: acetone gas sensor;    polypyrrole-SWCNT composite;    high sensitivity;    room temperature;    moisture resistance;   

DOI  :  10.3390/bios12050354

来源: DOAJ

【 摘 要 】

We synthesized core-shell-shaped nanocomposites composed of a single-walled carbon nanotube (SWCNT) and heptadecafluorooctanesulfonic acid-doped polypyrrole (C8F-doped-PPy)/phenyllatic acid (PLA), i.e., C8F-doped-PPy/PLA@SWCNT, for detecting acetone gas with high sensitivity and humidity stability. The obtained nanocomposites have the structural features of a sensing material as a C8F-doped-PPy layer surrounding a single-stranded SWCNT, and a PLA layer on the outer surface of the PPy as a specific sensing layer for acetone. PLA was chemically combined with the positively charged PPy backbone and provided the ability to reliably detect acetone gas at concentrations as low as 50 ppb even at 25 °C, which is required for medical diagnoses via human breath analysis. When C8F was contained in the pyrrole monomer in a ratio of 0.1 mol, it was able to stably detect an effective signal in a relative humidity (RH) of 0–80% range.

【 授权许可】

Unknown