Issue 32, 2018

Highly sensitive ethylene glycol-doped PEDOT–PSS organic thin films for LPG sensing

Abstract

In this study, for the first time we report the fabrication of low-cost ethylene glycol (EG)-doped PEDOT–PSS (poly 3,4-ethylenedioxythiophene:polystyrene sulfonate) organic thin film sensors for the detection of LPG at room temperature. The prepared thin films were characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible (UV-Vis) spectroscopy and thermogravimetric analysis (TGA) techniques for the analysis of their structural and morphological features. The doping of EG strongly improved the conductivity of pure PEDOT–PSS films by three orders of magnitude. The gas sensing responses of pristine and doped PEDOT–PSS thin films were investigated at room temperature by fabricating a sensor device on an ITO-coated glass substrate. The gas sensing characteristics of the prepared thin films were investigated for liquified petroleum gas (LPG), dimethyl propane, methane and butane test gases. The EG-doped PEDOT–PSS thin films exhibited excellent sensitivity for all the test gases, especially towards LPG, at room temperature. The sensitivity of the doped PEDOT–PSS films was recorded to be >90% for LPG with improved response and recovery time. The stability study indicated that the sensing response of doped PEDOT–PSS thin films was highly stable over a period of 30 days. Due to enhanced sensitivity, stability and fast response and recovery times, these EG-doped PEDOT–PSS thin films can be used in gas sensor technology, especially towards the detection of LPG at room temperature.

Graphical abstract: Highly sensitive ethylene glycol-doped PEDOT–PSS organic thin films for LPG sensing

Article information

Article type
Paper
Submitted
02 fev 2018
Accepted
03 may 2018
First published
16 may 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 18074-18083

Highly sensitive ethylene glycol-doped PEDOT–PSS organic thin films for LPG sensing

A. Pasha, S. Khasim, O. A. Al-Hartomy, M. Lakshmi and K. G. Manjunatha, RSC Adv., 2018, 8, 18074 DOI: 10.1039/C8RA01061G

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party commercial publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements