Structuring of polymer solutions upon solvent evaporation

Schaefer, Charley; Schoot, van der Ppam Paul; Michels, JJ

doi:10.1103/physreve.91.022602

Cited by 36 publications

(56 citation statements)

References 54 publications

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“…Inserting this into the expression for the diffusion length and evaluating Eq. (7) [29,31]. As we have found from our simulations, this result is incorrect due to the influence of thermal fluctuations [50,51].…”

mentioning

confidence: 52%

“…It does, however, not directly explain the behavior just after entering the unstable region of the phase diagram: While the mean-field models predict a spinodal length that decreases with time due to ongoing destabilization of the mixture [20,31,37,49], we here find a structural length scale that increases with time prior to reaching the usual R Ã ∝ t 1=3 scaling at late times (solid lines) [52].…”

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confidence: 77%

“…Previous works showed that the time dependence of the composition alters the spinodal wavelength following an instantaneous temperature quench into the miscibility gap [33][34][35]. On the other hand, if the quench is gradual rather than instantaneous, then local mean-field models predict the spinodal length scale to decrease with the one-sixth power of the evaporation rate [20,29,31,36,37]. Although it is known that nucleation may play a role in experimental systems [38][39][40], the validity of the mean-field approximation was not tested systematically.…”

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confidence: 99%

“…It is now of interest to compare the time evolution of this length scale to what is expected from the phenomenological models [20,29,31,37,49]. To serve this purpose we have plotted the time evolution of R Ã ðtÞ in Fig.…”

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confidence: 99%

“…Rather than attempting to include all aspects of the detailed chemistry in computationally expensive molecular dynamics simulations, we capture the relevant physics of uniformly destabilized systems using a simple twodimensional lattice model [20,[28][29][30][31], evaluated using kinetic Monte Carlo (kMC) simulations [32][33][34][35]. Previous works showed that the time dependence of the composition alters the spinodal wavelength following an instantaneous temperature quench into the miscibility gap [33][34][35].…”

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confidence: 99%

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Structuring of Fluid Adlayers upon Ongoing Unimolecular Adsorption

Schaefer

2018

Phys. Rev. Lett.

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Fluids with spatial density variations of single or mixed molecules play a key role in biophysics, soft matter and materials science. The fluid structures usually form via spinodal decomposition or nucleation following an instantaneous destabilisation of the initially disordered fluid. However, in practice an instantaneous quench is often not viable, and the rate of destabilisation may be gradual rather than instantaneous. In this work we show that the commonly used phenomenological descriptions of fluid structuring are inadequate under these conditions. We come to that conclusion in the context of surface catalysis, where we employ kinetic Monte Carlo simulations to describe the unimolecular adsorption of gaseous molecules onto a metal surface. The adsorbates diffuse at the surface and, as a consequence of lateral interactions and due to an ongoing increase of the surface coverage, phase separate into coexisting low-and high-density regions. The typical size of these regions turns out to depend much more strongly on the rate of adsorption than predicted from recently reported phenomenological models. We discuss how this finding contributes to the fundamental understanding of the crossover from liquid-liquid to liquid-solid demixing of solutioncast polymer blends.

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confidence: 52%

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confidence: 77%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Structuring of Fluid Adlayers upon Ongoing Unimolecular Adsorption

Schaefer

2018

Phys. Rev. Lett.

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Polymer Blending and Phase Behavior in Organic Electronics: Two Case Studies

Michels

Kunz²,

Dehsari³

et al. 2019

Solution‐Processable Components for Organic Electronic Devices

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Roll‐to‐Roll Fabrication of Solution Processed Electronics

Abbel¹,

2018

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The production of electronic devices using solution based ("wet") deposition technologies has some decisive technical and commercial advantages compared to competing approaches like vacuum based ("dry") manufacturing. Particularly, the potential to scale up production processes to large areas and high volumes by introducing continuous roll-to-roll (R2R) methods on flexible substrates has been the topic of intense studies from both applied research institutes and industry already for some years. Decisive steps forward have been achieved during that time, resulting in the dawn of commercial applications for a number of processes, while additional development work is still needed in some other fields. This review summarizes the work published during the last few years on the R2R printing and wet coating of electronic devices. An overview is presented of the basic operational principles for the most commonly used R2R printing and coating methods and techniques for proper web handling in R2R lines. Then, the most commonly used types of flexible substrate materials are introduced, followed by a review of the work published in the application areas of transparent conductor materials, printed electric connections, light emitting devices, photovoltaic energy generation, printed logic, and sensing.

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Structuring of polymer solutions upon solvent evaporation

Cited by 36 publications

References 54 publications

Structuring of Fluid Adlayers upon Ongoing Unimolecular Adsorption

Structuring of Fluid Adlayers upon Ongoing Unimolecular Adsorption

Polymer Blending and Phase Behavior in Organic Electronics: Two Case Studies

Roll‐to‐Roll Fabrication of Solution Processed Electronics

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