Superhydrophobic–Superoleophilic Polythiophene Films with Tunable Wetting and Electrochromism

Pernites, Roderick B.; Ponnapati, Ramakrishna; Advincula, Rigoberto C.

doi:10.1002/adma.201100469

Cited by 92 publications

(62 citation statements)

References 35 publications

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“…Zhang et al reported that the contact angle of unsubstituted PTh obtained by electropolymerization is higher than 100 . 58 Moreover, the same authors showed that the waterrepellency of PTh increases with the thickness, 58 which was attributed to the effect of the supercial morphology on the roughness. Thus, ultrathin lms are compact and smooth while the surface becomes more irregular and porous as the thickness increases, enhancing the roughness.…”

Section: Surface Wettabilitymentioning

confidence: 99%

Polythiophene-g-poly(ethylene glycol) graft copolymers for electroactive scaffolds

et al. 2013

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The properties, microscopic organization and behavior as the cellular matrix of an all-conjugated polythiophene backbone (PTh) and well-defined poly(ethylene glycol) (PEG) grafted chains have been investigated using different experimental techniques and molecular dynamic simulations. UV-vis spectroscopy has been used to determine the optical band gap, which has been found to vary between 2.25 and 2.9 eV depending on the length of the PEG chains and the chemical nature of the dopant anion, and to detect polaron / bipolaron transitions between band gap states. The two graft copolymers have been found to be excellent cellular matrices, their behavior being remarkably better than that found for other biocompatible polythiophene derivatives [e.g. poly (3,4-ethylenedioxythiophene)]. This is fully consistent with the hydrophilicity of the copolymers, which increases with the molecular weight of the PEG chains, and the molecular organization predicted by atomistic molecular dynamics simulations. Graft copolymers tethered to the surface tend to form biphasic structures in solvated environments (i.e. extended PTh and PEG fragments are perpendicular and parallel to the surface, respectively) while they collapse onto the surface in desolvated environments. Furthermore, the electrochemical activity and the maximum of current density are remarkably higher for samples coated with cells than for uncoated samples, suggesting multiple biotechnological applications in which the transmission with cells is carried out at the electrochemical level.

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Section: Surface Wettabilitymentioning

confidence: 99%

Polythiophene-g-poly(ethylene glycol) graft copolymers for electroactive scaffolds

et al. 2013

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“…Since the company of Kao in Japan firstly prepared superhydrophobic surface with contact angle of 174º [9], many techniques have been reported to produce superhydrophobic surfaces, including self-assembly, electrospinning, polymer imprinting, plasma-treated surfaces, lithography, and so on [10][11][12][13][14][15][16]. In recent years, more and more researches focus on manufacturing hydrophobic surface based on the technology of laser-induced microstructure.…”

Section: Introductionmentioning

confidence: 99%

Modification of wettability property of titanium by laser texturing

Yang

Mei

Tian

et al. 2016

Int J Adv Manuf Technol

111

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Three different microstructures with line pattern, grid pattern and spot pattern were fabricated on titanium surfaces by nanosecond laser. Scanning electron microscopy (SEM), contact angle measurement, surface roughness gauge and X-ray photoelectron spectroscopy (XPS) analysis were used to characterize and measure the surface morphology, contact angle, surface roughness and chemical composition of titanium after laser processing. The results indicate that the contact angle of titanium surface is 77.8º immediately after laser processing, which shows hydrophilicity, and the contact angle presents a rising tendency with time in general. At steady state, the maximum contact angles for line pattern, grid pattern and spot pattern increased to 157.2º , 153º and 132.5º , respectively. It can be found that the surface wettability has changed from hydrophilicity to hydrophobicity and even to superhydrophobicity. The influence of surface morphology on the surface wettability effects immediately after laser treatment and does not change with time, while the effect of surface chemical composition on the surface wettability will continue from the beginning of laser processing to the stabilization of surface chemical composition. Finally, it can be deduced that the accumulation of carbon on the surface is probably the critical factor to improve the surface hydrophobicity. Therefore, it is concluded that laser-induced modification of surface wettability correlates with surface morphology and surface chemical composition.

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“…[ 18 ] This result indicates that the as-prepared S-PTHF retained the high redox activity of polythiophenes, a very important property of π-conjugated polymers used to prepare smart surfaces whose wettability could be rapidly and reversibly switched. [ 16 ] S-PTHF that was neutral or was dedoped at −0.4 V had superhydrophobic property, as evidenced by the large static WCA (159.0°, inset of Figure 2 b). The sliding angle (SA) of a 4 µL water droplet on its surface was around 3.9°, indicating its surface-self-cleaning effect.…”

Section: Doi: 101002/admi201400011mentioning

confidence: 99%

“…Many studies revealed that doping and dedoping could trigger the switching of surface wettability. [ 16 ] However, most of these Figure 1 a, the electrodeposited PEDOT fi lm had a highly porous network-like structure (electrodeposition charge ( Q ) = 35.9 ± 3 mC cm −2 ). After deposition of P(3-HTH) ( Q = 34.7 ± 3 mC cm −2 ) ( Figure S3), the highly porous, nanoscale rough structure was successfully retained (Figure 1 b), in contrast to the structure after direct electrodeposition of P(3-HTH) on ITO substrate (Figure 1 d).…”

Section: Doi: 101002/admi201400011mentioning

confidence: 99%

See 1 more Smart Citation

Reversible Switching of Water‐Droplet Adhesion on a Superhydrophobic Polythiophene Surface

Lü

et al. 2014

Adv Materials Inter

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Superhydrophobic–Superoleophilic Polythiophene Films with Tunable Wetting and Electrochromism

Cited by 92 publications

References 35 publications

Polythiophene-g-poly(ethylene glycol) graft copolymers for electroactive scaffolds

Polythiophene-g-poly(ethylene glycol) graft copolymers for electroactive scaffolds

Modification of wettability property of titanium by laser texturing

Reversible Switching of Water‐Droplet Adhesion on a Superhydrophobic Polythiophene Surface

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