Electric field induced dewetting and pattern formation in thin conducting polymer film

Manigandan, Sabapathy; Majumder, Saptarshi; Suresh, A.; Ganguly, Saibal; Kargupta, Kajari; Banerjee, Dipali

doi:10.1016/j.snb.2009.10.052

Cited by 14 publications

(14 citation statements)

References 17 publications

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“…In particular, a parallel-plate capacitor geometry consisting of two parallel charged conducting plates with an air gap between them has been widely used to manipulate both films and drops of liquid. For example, Schaffer et al [13,14], Morariu et al [15], Klingner et al [16,17], Pease and Russel [18], Craster and Matar [19], Merkt et al [20], Verma et al [21], Wu et al [22], Tseluiko et al [23], Yeoh et al [24], Manigandan et al [25], Berendsen et al [26], Ramkrishnan and Kumar [27], and Corbett and Kumar [28] used electric fields to study the stability of and pattern formation in liquid films on uniform substrates and/or to generate prescribed patterns on nonuniform substrates. The latter is of particular interest as it enables manufacturers to replicate small-scale electrode patterns in a liquid film (which can then be "frozen in" by solidifying the film, i.e., electrostatic lithography).…”

Section: Introductionmentioning

confidence: 99%

Dynamic response of a thin sessile drop of conductive liquid to an abruptly applied or removed electric field

et al. 2016

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We consider, both theoretically and experimentally, a thin sessile drop of conductive liquid that rests on the lower plate of a parallel-plate capacitor. We derive analytical expressions for both the initial deformation and the relaxation dynamics of the drop as the electric field is either abruptly applied or abruptly removed, as functions of the geometrical, electrical, and material parameters, and investigate the ranges of validity of these expressions by comparison with full numerical simulations. These expressions provide a reasonable description of the experimentally measured dynamic response of a drop of conductive ionic liquid 1-butyl-3-methyl imidazolium tetrafluoroborate.

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Section: Introductionmentioning

confidence: 99%

Dynamic response of a thin sessile drop of conductive liquid to an abruptly applied or removed electric field

et al. 2016

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“…18,19 Studies of electrohydrodynamic instabilities mostly involve dielectric liquid of polymers, but few studies have discussed the case of electrohydrodynamic instabilities in conjugated polymers, which commonly belong to a kind of organic semiconductors. [20][21][22] A possible reason is that conjugated polymers are easy to degrade when being exposed to strong electric elds, leading to no feature of lm instability emerging. 23 Actually, the electrohydrodynamic instabilities in a conjugated polymer lm are of more importance because the patterning lms of conjugated polymers may be applied in various organic electronics.…”

Section: Introductionmentioning

confidence: 99%

“…23 Actually, the electrohydrodynamic instabilities in a conjugated polymer lm are of more importance because the patterning lms of conjugated polymers may be applied in various organic electronics. 24 The electrohydrodynamic instabilities in the polymer lm are inuenced by the polymer conductivity due to the absence of the electric eld inside the conductive lm, 22,25,26 and thus accumulated charge in the polymer lm is possible to be probed by the evolution of the destabilized structures.…”

Section: Introductionmentioning

confidence: 99%

Charge injection promoted electrohydrodynamic instabilities in poly(3-hexylthiophene) thin films

Cui

Yang

et al. 2015

J. Mater. Chem. C

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“…The spatial modulation of an electric eld by a at template has been explored to control the size and periodicity of a pillar array based on a denition of the most unstable wavelength. 2,8,10 These studies also served as a basis for the structuring processes using a patterned template, which led to many interesting shapes of micro-or nano-structures with potential applicability in microelectronics, micro-or nano-uidic devices, superhydrophobic surfaces, [11][12][13][14][15] etc.…”

Section: Introductionmentioning

confidence: 99%

Formation of irregular micro- or nano-structure with features of varying size by spatial fine-modulation of electric field

et al. 2013

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Electrically induced patterning is a process for fabricating micro-or nano-structures where a voltage is applied between a conductive template and a polymer-coated substrate, sandwiching an air gap. In the structure-forming process, the polymer film is pulled upwards non-uniformly to the template under the influence of an electric field spatially modulated by protrusions and cavities of the template pattern, being deformed into a structure positive to the template pattern. This paper explores applicability of the electrically induced patterning process in duplicating an irregular structure with features of significantly varying size from a template onto the polymer, and shows that irregular structures, such as the one composed of features with a linewidth varying from 2 mm to 20 mm, as in our experiment and numerical simulation, can be formed on the polymer by a spatially fine-modulated electric field. A ratio of modified most unstable wavelength on the characteristic length and a mass parameter are proposed in terms of the major process variables to define the regimes of spatial modulation by the electric field, i.e. under-modulation, fine-modulation and over-modulation. In addition, an experiment is also performed to duplicate clusters of cylindrical pillars and square prisms sized from 5 mm to 40 mm by tuning the process into a regime of fine-modulation. The experimental results have shown an applicability of the ratio of the modified most unstable wavelength on the characteristic length and the mass parameter in characterizing this structuring method.

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Electric field induced dewetting and pattern formation in thin conducting polymer film

Cited by 14 publications

References 17 publications

Dynamic response of a thin sessile drop of conductive liquid to an abruptly applied or removed electric field

Dynamic response of a thin sessile drop of conductive liquid to an abruptly applied or removed electric field

Charge injection promoted electrohydrodynamic instabilities in poly(3-hexylthiophene) thin films

Formation of irregular micro- or nano-structure with features of varying size by spatial fine-modulation of electric field

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