Physical and Electrochemical Properties of PEDOT:PSS as a Tool for Controlling Cell Growth

Marzocchi, Marco; Gualandi, Isacco; Calienni, Maria; Zironi, Isabella; Scavetta, Erika; Castellani, Gastone; Fraboni, Beatrice

doi:10.1021/acsami.5b04768

Cited by 118 publications

(118 citation statements)

References 36 publications

(56 reference statements)

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“…The electrochemical response to oxidation conditions for the PEDOT molecule involved acceptance of an electron, which caused rearrangement of the conjugation of double bonds and the formation of a cation and unpaired electron. The second step of oxidation resulted in complete oxidation where only cations are present [39]. It seems that, in the case of water-based solutions, the oxidation to the fully oxidized step occurred in one step, with oxidation onset at 0.38 V. Similar oxidation behavior was observed for the toluene-based PEDOT:PSS solution with oxidation onset at 1.22 V. On the other hand, the reduction of both starting solutions also differed, giving values of offset points at −1.14 V and −1.83 V for PEDOT:PSS in water and toluene, respectively.…”

Section: Of Pedot:pss In Water and Toluene Without And With Alcoholsmentioning

confidence: 99%

PEDOT:PSS in Water and Toluene for Organic Devices—Technical Approach

et al. 2020

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Poly(3,4-ethylenedioxythiophene:poly(styrenesulfonate) (PEDOT:PSS) water and toluene solutions were investigated in detail, taking into consideration their stability, wettability, transparency, and electrochemical properties, along with change polarity caused by dopant. As dopant, methanol, ethanol, and isopropanol were used with different dipole moments (1.70, 1.69, and 1.66 D) and dielectric constants (33.0, 24.5, and 18.0). Three techniques, i.e., spin coating, doctor blade coating, and spray coating, were employed to created PEDOT:PSS layers on glass, glass/indium tin oxide (ITO), and glass/fluorine-doped tin oxide (FTO) substrates with optimized technical parameters for each used equipment. All used PEDOT:PSS water and toluene solutions demonstrated good wetting properties with angles below 30° for all used surfaces. Values of the energy bandgap (Eg) of PEDOT:PSS investigated by cyclic voltammetry (CV) in solution showed increase energy Eg along with addition of alcohol to the mixture, and they were found in the range of 1.20 eV to 2.85 eV. The opposite tendency was found for the Eg value of the PEDOT:PSS layer created from water solution. The storage effect on PEDOT:PSS layers detected by CV affected only the lowest unoccupied molecular orbital (LUMO) level, thereby causing changes in the energy bandgap. Finally, simple devices were constructed and investigated by infrared (IR) thermographic camera to investigate the surface defects on the created PEDOT:PSS layers. Our study showed that a more stable PEDOT:PSS layer without pin-holes and defects can be obtained from water and toluene solutions with isopropanol via the spin coating technique with an optimal speed of 3000 rpm and time of 90 s.

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Section: Of Pedot:pss In Water and Toluene Without And With Alcoholsmentioning

confidence: 99%

PEDOT:PSS in Water and Toluene for Organic Devices—Technical Approach

et al. 2020

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“…The current density increases proportionally with the scan rate suggesting that the electrochemical process depends on the difussion. [34] Moreover, detailed inspection of the voltammograms recorded for CUR/PEDOT NPs allows identification of the CUR anodic peak at a potential between 0.4 and 0.5 V, depending on the scan rate. Figure 6e plots the current density at the anodic and cathodic peaks (j p ) of CUR against the square root of the scan rate, while Figure 6f represents the same graphic for the irreversible anodic process of PIP at 0.92 V. A linear behavior is observed in all cases.…”

Section: Cyclic Voltammograms Recorded For Cur and Pip Are Displayed mentioning

confidence: 99%

Electrostimulated Release of Neutral Drugs from Polythiophene Nanoparticles: Smart Regulation of Drug–Polymer Interactions

Puiggalı́-Jou

Micheletti

Estrany

et al. 2017

Adv Healthcare Materials

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Poly(3,4-ethylenedioxythiophene) (PEDOT) nanoparticles are loaded with curcumin and piperine by in situ emulsion polymerization using dodecyl benzene sulfonic acid both as a stabilizer and a doping agent. The loaded drugs affect the morphology, size, and colloidal stability of the nanoparticles. Furthermore, kinetics studies of nonstimulated drug release have evidenced that polymer···drug interactions are stronger for curcumin than for piperine. This observation suggests that drug delivery systems based on combination of the former drug with PEDOT are much appropriated to show an externally tailored release profile. This is demonstrated by comparing the release profiles obtained in presence and absence of electrical stimulus. Results indicate that controlled and time-programmed release of curcumin is achieved in a physiological medium by applying a negative voltage of -1.25 V to loaded PEDOT nanoparticles.

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“…To extend this capability further, we produce centimetre long fibres to guide cellular alignment, where the fibre can simultaneously function as an impedimetric sensor detecting dynamics of cell coverage (Fig.4 D). Cell coverage on PEDOT:PSS electrode surfaces is known to increase the electrode's sensing impedance (41,42). Coupled with simultaneous live cell imaging permitted by the fibre array, it is found that in our fibre-electrode setup, the impedance increases most noticeably during the initial stages of cell attachment and fibre-guided cell alignment (within approximatively 100 min from cell sedimentation).…”

Section: Inflight Fluidic Fibre Printingmentioning

confidence: 72%

“…PEDOT:PSS fibre-based biointerface devices PEDOT:PSS are known to have convenient cellular biocompatibility (30,40,41). Thus, we have used the fibre array to form bio-interfaced sensing devices.…”

Section: Inflight Fluidic Fibre Printingmentioning

confidence: 99%

Inflight Fluidic Fibre Printing Towards Array and 3D Optoelectronic and Sensing Architectures

Wang¹,

Ouarus²,

Rutz³

et al. 2020

Preprint

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Scalability and device-integration have been prevailing issues limiting our ability in harnessing the full potential of small-diameter conducting fibres. We report inflight fluidic fibre printing, a rapid, low-cost route that integrates the entire process of conducting fibre production and fibre-to-circuit connection, in a single step under sub-100 °C ambient atmospheres. Metallic (silver) or organic (PEDOT:PSS) fibres with 1-3 μm diameter are fabricated, and the fibre arrays exhibit over 95 % transmittance in the 350-750 nm region. We exploit combinations of the unique fibre characteristics: directionality, high surface-area-to-volume ratio, and permissiveness, along with transparency and conductivity. Using PEDOT:PSS fibres as a cell-interfaced impedimetric sensor and a moisture sensor, we show that even a single fibre component can achieve complex functions or outperform conventional film-based devices. The capability to design suspended fibres and networks of homo-, hetero-cross-junctions, paves the way to applications including flow-permissive devices, and 3D optoelectronic and sensor architectures.

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Physical and Electrochemical Properties of PEDOT:PSS as a Tool for Controlling Cell Growth

Cited by 118 publications

References 36 publications

PEDOT:PSS in Water and Toluene for Organic Devices—Technical Approach

PEDOT:PSS in Water and Toluene for Organic Devices—Technical Approach

Electrostimulated Release of Neutral Drugs from Polythiophene Nanoparticles: Smart Regulation of Drug–Polymer Interactions

Inflight Fluidic Fibre Printing Towards Array and 3D Optoelectronic and Sensing Architectures

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