Abstract
In this study, the transparent conducting polymer of poly (3,4-ethylenendioxythiophene): poly(styrene sulphonate) (PEDOT:PSS) was nanohybridized via inclusion of gold nanofillers including nanospheres (NSs) and nanorods (NRs). Such nanocomposite thin films offer not only more optimum conductivity than the pristine polymer but also excellent resistivity against volatile organic compounds (VOCs). Interestingly, such amazing properties are achieved in the diluted regimes of the nanofillers and depend on the characteristics of the interfacial region of the polymer and nanofillers, i.e. the aspect ratio of the latter component. Accordingly, a shape dependent response is made that is more desirable in case of using the Au nanorods with a much larger aspect ratio than their nanosphere counterparts. This transparent nanocomposite thin film with an optimized conductivity and very low sensitivity to organic gases is undoubtedly a promising candidate material for the touch screen panel production industry. Considering PEDOT as a known material for integrated electrodes in energy saving applications, we believe that our strategy might be an important progress in the field.
Highlights
Found in indoor and outdoor air, a decline of conductivity occurs
To the best of our knowledge, no report in the literature describes a similar approach for minimizing VOC sensitivity while augmenting conductivity of PEDOT: PSS
Here, for the first time, we aim to benefit from incorporation of metal nanofillers at a very low filling factor (~5%) in two directions of optimization of electrical conductivity and more importantly minimizing VOCs sensitivity of the material without compromising its transparency
Summary
Found in indoor and outdoor air, a decline of conductivity occurs. This is why, PEDOT:PSS13–16 and the nanocomposites made thereof[17,18,19,20] have shown a high potential as gas sensors. Diversity of the nanofillers’ shape/aspect ratio, thereby width of the interfacial region, can play an important role in tuning sensing, optical and electrical properties of the PEDOT:PSS. To the best of our knowledge, no report in the literature describes a similar approach for minimizing VOC sensitivity while augmenting conductivity of PEDOT: PSS
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