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基于 SWCNT/聚吡咯/苯乳酸纳米复合材料的丙酮气敏传感器，具有高灵敏度和湿度稳定性。

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

机构信息

School of Advanced Materials Engineering, Kookmin University, Seoul 136-702, Korea.

Head Office Laboratory, LG Japan Lab Inc., Tokyo 140-0002, Japan.

出版信息

Biosensors (Basel). 2022 May 19;12(5):354. doi: 10.3390/bios12050354.

DOI:10.3390/bios12050354
PMID:35624655
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9139215/
Abstract

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.

摘要

我们合成了由单壁碳纳米管（SWCNT）和全氟辛烷磺酸掺杂的聚吡咯（C8F-doped-PPy）/苯丙氨酸（PLA）组成的核壳型纳米复合材料，即 C8F-doped-PPy/PLA@SWCNT，用于高灵敏度和湿度稳定性检测丙酮气体。所得纳米复合材料具有作为传感材料的结构特征，即 C8F-doped-PPy 层围绕单链 SWCNT，以及 PPy 外表面上的 PLA 层作为丙酮的特定传感层。PLA 与带正电荷的 PPy 主链发生化学结合，并提供了在 25°C 下可靠检测低至 50 ppb 的丙酮气体的能力，这是通过人体呼吸分析进行医学诊断所必需的。当 C8F 在吡咯单体中的比例为 0.1mol 时，它能够在相对湿度（RH）为 0-80%的范围内稳定地检测到有效信号。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7128/9139215/0f362d36cc7a/biosensors-12-00354-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7128/9139215/ee284bb4de11/biosensors-12-00354-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7128/9139215/c97e718d6b64/biosensors-12-00354-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7128/9139215/a4a355e4d986/biosensors-12-00354-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7128/9139215/7e95f06965ef/biosensors-12-00354-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7128/9139215/db72741a0774/biosensors-12-00354-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7128/9139215/0f362d36cc7a/biosensors-12-00354-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7128/9139215/ee284bb4de11/biosensors-12-00354-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7128/9139215/c97e718d6b64/biosensors-12-00354-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7128/9139215/a4a355e4d986/biosensors-12-00354-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7128/9139215/7e95f06965ef/biosensors-12-00354-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7128/9139215/db72741a0774/biosensors-12-00354-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7128/9139215/0f362d36cc7a/biosensors-12-00354-g006.jpg

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