Photopatternable PEDOT:PSS/PEG hybrid thin film with moisture stability and sensitivity

Zhu, Zijie; Yang, Guojing; Li, Ruya; Pan, Tingrui

doi:10.1038/micronano.2017.4

Cited by 51 publications

(42 citation statements)

References 65 publications

(93 reference statements)

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“…Other treatments for PDMS include activation with hydrochloric acid (HCl) or methanesulfonic acid, however, the use of strong acids (HCl) can deteriorate the performance of organic solar cells due to the presence of acidic residues in the vicinity of the active layer. An alternative protocol which did not require surfactants, reported by Zhu et al, consisted in depositing a layer of crosslinked hydrophilic polymer (polyethylene glycol diacrylate or PEGDA) on the surface of PDMS then transferring PEDOT:PSS doped with ethylene glycol by stamping . An advantage of this approach was that the surface could be patterned by selective photo‐crosslinking of PEGDA using masks, although the PDMS still required activation with an oxygen plasma to allow the adhesion of PEGDA.…”

Section: Physical Approachesmentioning

confidence: 99%

Stretchable Conductive Polymers and Composites Based on PEDOT and PEDOT:PSS

2019

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The conductive polymer poly(3,4‐ethylenedioxythiophene) (PEDOT), and especially its complex with poly(styrene sulfonate) (PEDOT:PSS), is perhaps the most well‐known example of an organic conductor. It is highly conductive, largely transmissive to light, processible in water, and highly flexible. Much recent work on this ubiquitous material has been devoted to increasing its deformability beyond flexibility—a characteristic possessed by any material that is sufficiently thin—toward stretchability, a characteristic that requires engineering of the structure at the molecular‐ or nanoscale. Stretchability is the enabling characteristic of a range of applications envisioned for PEDOT in energy and healthcare, such as wearable, implantable, and large‐area electronic devices. High degrees of mechanical deformability allow intimate contact with biological tissues and solution‐processable printing techniques (e.g., roll‐to‐roll printing). PEDOT:PSS, however, is only stretchable up to around 10%. Here, the strategies that have been reported to enhance the stretchability of conductive polymers and composites based on PEDOT and PEDOT:PSS are highlighted. These strategies include blending with plasticizers or polymers, deposition on elastomers, formation of fibers and gels, and the use of intrinsically stretchable scaffolds for the polymerization of PEDOT.

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Section: Physical Approachesmentioning

confidence: 99%

Stretchable Conductive Polymers and Composites Based on PEDOT and PEDOT:PSS

2019

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“…In Fig. 16a, conductive PEDOT:PSS and PDMS are chemically linked by a poly (ethylene glycol) diacrylate (PEGDA) layer [102]. Such chemical linkages can be applied to many other polymer/polymer junctions.…”

Section: Strategies For Stretchable Reflective Displaymentioning

confidence: 99%

Stretchable and reflective displays: materials, technologies and strategies

Kim

Sung

et al. 2019

Nano Convergence

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Displays play a significant role in delivering information and providing visual data across all media platforms. Among displays, the prominence of reflective displays is increasing, in the form of E-paper, which has features distinct from emissive displays. These unique features include high visibility under daylight conditions, reduced eye strain and low power consumption, which make them highly effective for outdoor use. Furthermore, such characteristics enable reflective displays to achieve high synergy in combination with wearable devices, which are frequently used for outdoor activities. However, as wearable devices must stretch to conform to the dynamic surfaces of the human body, the issue of how to fabricate stretchable reflective displays should be tackled prior to merging them with wearable devices. In this paper, we discuss stretchable and reflective displays. In particular, we focus on reflective displays that can be divided into two types, passive and active, according to their responses to stretching. Passive displays, which consist of dyes or pigments, exhibit consistent colors under stretching, while active displays, which are based on mechanochromic materials, change their color under the same conditions. We will provide a comprehensive overview of the materials and technologies for each display type, and present strategies for stretchable and reflective displays.

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“…Similarly, textile-based devices [25] could also be more realistically tested on a sweating platform. Furthermore, other flexible sensing prototypes, such as breathing rate devices based on moisture sensing, could also be tested on the sweating arm model [29].…”

Section: Introductionmentioning

confidence: 99%

An Artificial Sweating System for Sweat Sensor Testing Applications

et al. 2019

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This research proposes a completely automated, computer-controlled fluid mixing and dispensing system, which is suitable for testing sweat sensing devices, as an alternative to requiring human trials during the development phase of a sweat sensor device. An arm mold was designed and implemented with dragon skin and pores to simulate sweating action. The relay controlled mixing tanks allow for the different concentration of fluid solutions at various rates of fluid dispensing through pores. The onboard single board computer controls a dozen electronic relays and it switches and presents an easy to use graphical user interface to allow end users to conduct the experiments with ease and not require further programming. With the recent advances in sweat sensors, this platform offers a unique way of testing sensing devices during development, allowing for researchers to focus on their design parameters one at a time before actual validation through human trials are conducted. The current device can provide sweat rates from 1 µL/min to 500 µL/min. Furthermore, concentrations of 10 mM up to 200 mM of salt concentrations were able to be repeatedly produced. In an ANOVA test with salt concentrations varying from 40–60 mM, a p-value of 0.365 shows that the concentration does not have any effect on the flow rate. Similarly, a p-value of 0.329 and 0.167 for different relative humidity and temperature shows that the system does not present a statistical difference. Lastly, when the interactions among all the factors were considered, a p-value of 0.416 clearly presents that the system performance is insensitive to different factors, thus validating the system reliability.

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Photopatternable PEDOT:PSS/PEG hybrid thin film with moisture stability and sensitivity

Cited by 51 publications

References 65 publications

Stretchable Conductive Polymers and Composites Based on PEDOT and PEDOT:PSS

Stretchable Conductive Polymers and Composites Based on PEDOT and PEDOT:PSS

Stretchable and reflective displays: materials, technologies and strategies

An Artificial Sweating System for Sweat Sensor Testing Applications

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