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Sensors 2015, 15(11), 28842-28853; doi:10.3390/s151128842

A Room-Temperature Operation Formaldehyde Sensing Material Printed Using Blends of Reduced Graphene Oxide and Poly(methyl methacrylate)

Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 10617, Taiwan
Department of Engineering Science and Ocean Engineering, National Taiwan University, Taipei 10617, Taiwan
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editor: W. Rudolf Seitz
Received: 13 September 2015 / Revised: 10 November 2015 / Accepted: 11 November 2015 / Published: 13 November 2015
(This article belongs to the Section Chemical Sensors)
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This work demonstrates a printable blending material, i.e., reduced graphene oxide (RGO) mixed with poly(methyl methacrylate) (PMMA), for formaldehyde sensing. Based on experimental results, 2% RGO/10% PMMA is an optimal ratio for formaldehyde detection, which produced a 30.5% resistance variation in response to 1000 ppm formaldehyde and high selectivity compared to different volatile organic compounds (VOCs), humidity, CO, and NO. The demonstrated detection limit is 100 ppm with 1.51% resistance variation. Characterization of the developed formaldehyde sensing material was performed by Fourier-transform infrared (FTIR) spectrometry, scanning electron microscopy (SEM), and Raman spectroscopy. Based on Raman spectroscopy, the basic sensing mechanism is the band distortion of RGO due to blending with PMMA and the adsorption of formaldehyde. This work establishes insights into the formaldehyde sensing mechanism and explores a potential printable sensing material for diverse applications. View Full-Text
Keywords: RGO; PMMA; formaldehyde; gas sensor RGO; PMMA; formaldehyde; gas sensor

Figure 1a

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Chuang, W.-Y.; Yang, S.-Y.; Wu, W.-J.; Lin, C.-T. A Room-Temperature Operation Formaldehyde Sensing Material Printed Using Blends of Reduced Graphene Oxide and Poly(methyl methacrylate). Sensors 2015, 15, 28842-28853.

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