Simulation and modelling of sub-30 nm polymeric channels fabricated by electrostatic induced lithography

Li, Huaqiong; Yu, Wen; Zhang, L.; Liu, Z.; Brown, Keith; Abraham, E.; Cargill, S.; Tonry, Catherine; Patel, Mayur; Bailey, C.; Desmulliez, Marc Phillipe Yves

doi:10.1039/c3ra40188j

Cited by 20 publications

(23 citation statements)

References 46 publications

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“…For the purposes of this study we will consider that the width and the height of the protrusions are w ¼ 0:2 and p ¼ 0:2, respectively. Since the effect of these geometric characteristics have been discussed in detail for the case of a Newtonian liquid by [31], we will keep these values constant and focus our attention on the remaining parameters of our model. The size of the domain will be considered to be L ¼ 4ðs þ wÞ unless stated otherwise.…”

Section: Resultsmentioning

confidence: 99%

“…Examples of fully non-linear simulations without making use of the lubrication approximation are the works of [28][29][30][31] who studied primarily cases involving heterogeneous electric fields. Yang et al [30], motivated by the work of Heier et al [9], considered a sinusoidally patterned top electrode and performed non-linear simulations using a boundary/finite element method to determine the critical parameters for instability of the liquid film.…”

Section: Introductionmentioning

confidence: 99%

“…Their results indicate that linear analysis can significantly over-predict the critical voltage for instability. Li et al [31] were also interested in heterogeneous electric fields and investigated the effect of various geometric features of the patterned electrode to determine the fabrication limits of this process using a diffuse interface method.…”

Section: Introductionmentioning

confidence: 99%

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Non-linear dynamics of a viscoelastic film subjected to a spatially periodic electric field

Karapetsas¹,

Bontozoglou²

2015

Journal of Non-Newtonian Fluid Mechanics

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We investigate the non-linear dynamics of the electrohydrodynamic instability of a viscoelastic polymeric film under a patterned mask. We develop a computational model and carry out 2D numerical simulations fully accounting for the flow and electric field in both phases. We perform a thorough parametric study and investigate the influence of the various rheological parameters, the applied voltage and the period of the protrusions of the mask in order to define the fabrication limits of this process in the case of patterned electrodes. Our results indicate that the effect of elasticity is destabilizing, in agreement with earlier studies in the literature based on linear stability analysis for homogeneous electric fields. However, the significance of the normal and shear polymeric stress components is found to change drastically as deformation advances, rendering inappropriate the lubrication approximation that neglects normal stresses. We also find that for low values of the Ca number a metastable state arises with finite interfacial deformation, the amplitude of which compares favourably with experimental observations in contrast with earlier predictions using linear theory. Though the critical voltage for this metastable state appears to be unaffected by the elasticity of the material, viscoelasticity affects the fabrication limit on the period of the protrusions of the top electrode

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Non-linear dynamics of a viscoelastic film subjected to a spatially periodic electric field

Karapetsas¹,

Bontozoglou²

2015

Journal of Non-Newtonian Fluid Mechanics

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“…During the past decade, many experimental and theoretical studies have been dedicated to understand the so‐called electrohydrodynamic instability patterning (EHDIP) process as this process holds the potential to generate arrays of self‐organized or customized periodic micro/nanostructures. In contrast to the dewetting process that cannot easily be altered since it is driven mostly by the material properties, the EHDIP method provides a facile and flexible control over the structure formation where a variety of morphologies, such as columns, channels, cavities and holes can be produced under different conditions.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of the faithful replication of micro/nanostructures on curved surfaces by the electrohydrodynamic instability process

Wang

et al. 2016

Electrophoresis

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This paper reports the numerical study of the one-step faithful replication of micro/nano-scale structures on a fiber surface by using the electrohydrodynamic instability patterning (EHDIP) process. By employing a rigorous numerical analysis method, conditions are revealed under which the faithful replication of a pattern can be achieved from a curved master electrode. It is found that the radius of curvature of the fiber plays an important role in determining the final morphology of the pattern when the destabilizing electric field is dominant in both the flat and patterned template cases. In general, stronger electric fields and larger radii of curvature of the substrate are favorable for the faithful replication of the pattern. In addition, theoretical analysis shows that higher aspect ratio of micro/nanostructures can be obtained on curved surfaces by using a master with a much lower aspect ratio. The results demonstrated in this study aims to provide guidelines for the faithful fabrication of micro/nanostructures on curved surfaces by the EHDIP process.

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“…12 Recently some irregular structures are produced by Tian et al, 13 also hieratical structures have been proved feasible by simulation and experiments via polymer/polymer/air tri-layer lm. Li et al employed this technique to fabricate microlens array, 11 the curvature of which is controlled by the amplitude of applied external electric eld.…”

Section: Introductionmentioning

confidence: 99%

Dynamic modelling of micro/nano-patterning transfer by an electric field

Yang¹,

Li²,

Ding³

2013

RSC Adv.

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A computational electrohydrodynamic (EHD) model is presented for the 3D electrically induced fluid motion and free surface morphology evolution during EHD patterning transfer of micro/nanostructures. The model entails a finite difference solution of the electric field equation with a leaky dielectric model to account for polymer behaviour, the Navier-Stokes equations for electrically driven flows and the phase field equation for the free surface deformation. These equations are fully coupled and represent a very large complex numerical system. Once discretized, the intensive computation is alleviated with the use of parallel computing algorithms. Computed results are presented that illustrate the transient development of 3D micro/nano-structures under an electric field. Two classical templates are considered in this study, for both of which the polymeric structures conform well to the template, resulting in the micro/nano-patterning transfer from the template to polymer film. The model is a useful tool to explore optimal conditions for scalable manufacturing of large scale nanostructures using the EHD patterning processes.

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Simulation and modelling of sub-30 nm polymeric channels fabricated by electrostatic induced lithography

Cited by 20 publications

References 46 publications

Non-linear dynamics of a viscoelastic film subjected to a spatially periodic electric field

Non-linear dynamics of a viscoelastic film subjected to a spatially periodic electric field

Numerical study of the faithful replication of micro/nanostructures on curved surfaces by the electrohydrodynamic instability process

Dynamic modelling of micro/nano-patterning transfer by an electric field

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