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Issue 114, 2016, Issue in Progress
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Layer-by-layer inkjet printing SPS:PEDOT NP/RGO composite film for flexible humidity sensors

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Abstract

We report the preparation of poly(3,4-ethylenedioxythiophene) (PEDOT) nanoparticles (NPs) and graphene oxide (GO) ink-based layer-by-layer inkjet printing humidity sensors. Sulfonate polystyrene:PEDOT NPs (SPS:PEDOT NPs) were prepared with hard template SPS NPs and GO was synthesized through a modified Hummers' method. Next, the SPS:PEDOT NP/GO multilayer films were printed layer by layer, with one layer of GO followed by one layer of SPS:PEDOT NP ink on the flexible poly-ethylene terephthalate (PET) substrate by using a home inkjet printer. The morphology and structure of the SPS:PEDOT NPs and GO were characterized through TEM and Raman spectroscopy and those of the film were investigated through optical microscopy. SPS:PEDOT NP-reduced GO (SPS:PEDOT NP/RGO) composite sensors were obtained after thermal annealing. To assess their humidity sensing properties, the sensors were exposed to a wide range of relative humidities (RH 0–98%) at room temperature. The SPS:PEDOT NP/RGO PET-based sensor exhibited superior humidity sensing properties in a wide response range (0.13–68.46%), short response and recovery time (39 and 57 s, respectively), and excellent repeatability and flexibility. The resistance of sensors was almost invariable even after folding 200 times. Overall, the SPS:PEDOT NP/RGO PET-based sensors can be used as humidity sensors.

Graphical abstract: Layer-by-layer inkjet printing SPS:PEDOT NP/RGO composite film for flexible humidity sensors

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Article information


Submitted
23 Sep 2016
Accepted
27 Nov 2016
First published
28 Nov 2016

RSC Adv., 2016,6, 113298-113306
Article type
Paper

Layer-by-layer inkjet printing SPS:PEDOT NP/RGO composite film for flexible humidity sensors

Y. Yuan, B. Peng, H. Chi, C. Li, R. Liu and X. Liu, RSC Adv., 2016, 6, 113298
DOI: 10.1039/C6RA23651K

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