Formation of ordered mesoscopic patterns in polymer cast films by dewetting

Karthaus, Olaf; Gråsjö, L.; Maruyama, Norihiko; Shimomura, Masatsugu

doi:10.1016/s0040-6090(98)00771-8

Cited by 54 publications

(53 citation statements)

References 12 publications

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“…1, Rh6G, rhodamine B (RhB), rhodamine 101 (Rh101) and NK1420 (5,6-dichloro-2-[3-(5,6-dichloro-1,3diethyl-2(3H)-benzimidazol ylidene)-1-propenyl]-1,3-diethylbenzimidazolium iodide) for the present study because each dye has a static positive charge so that they are expected to interact strongly with a hydrophilic glass surface with an exposed O -group [7]. The hydrophilic glass surface promoted a wetting/dewetting process [8] of polar organic solvent upon it, which was the primary motive force realizing the selforganizing formation of submicrometer-sized particle arrays of the dye [9]. When a glass rod slid over a 100 μl ethanol solution of typically 30 μg/ml Rh6G, a very thin layer of Rh6G solution was formed.…”

mentioning

confidence: 99%

Selective formation of dequenched aggregates of rhodamines: comparison with J‐ and H‐aggregates

Tomioka

Kamiyama

Fujimoto

et al. 2009

Phys. Status Solidi (c)

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Self‐organized rhodamine aggregates prepared by wetting / dewetting process of an ethanol solution on a hydrophilic glass surface consistently exhibited fluorescence without quenching. Upon annealing, the aggregates exhibited an irreversible transition to quenched state, similar to H‐aggregate, whereas the fluorescence spectrum was unchanged. The as grown highly fluorescent aggregate is a novel aggregate, neither a J‐aggregate nor an H‐aggregate, showing a blue‐shifted excitation spectrum whereas the emission spectrum is similar to that of molecularly dispersed solution. This fluorescent aggregate was only realized in nonequilibrium by the rapid dewetting process. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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mentioning

confidence: 99%

Selective formation of dequenched aggregates of rhodamines: comparison with J‐ and H‐aggregates

Tomioka

Kamiyama

Fujimoto

et al. 2009

Phys. Status Solidi (c)

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“…Similar to the spatiotemporal dynamics of dewetting and related self-organization processes [29,30], pattern formation in the ZL/PMMA/CHCl 3 system is in principle governed by physical processes in an evaporating solution. In such systems, the chemical nature of the involved components plays only a minor role in the pattern formation, leading to a variety of possibilities in terms of patternable compounds.…”

Section: Discussionmentioning

confidence: 97%

Self-organized patterns of microparticles in polymer films

et al. 2011

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A simple method to create self-organized patterns of microparticles in polymer films is demonstrated. Dye-loaded zeolite crystals are used as model microparticles, allowing convenient imaging of the patterns by fluorescence microscopy. The pattern formation can be interpreted within the general framework of the model of local self-activation and lateral inhibition. Two starting parameters, namely the polymer concentration and the wet film thickness, control the size and shape of the particle aggregates in the patterns, as well as their spacing. The size of the aggregates ranges from 50 to 340 µm. Self-Organized Patterns of Microparticles in Polymer FilmsChristophe Bauer, Nando Gartmann, Le-Quyenh Dieu, Nora Zuber, Igor Dolamic, Jan H.

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“…1 1-propenyl]-1,3-diethylbenzimidazolium iodide) for the present study because each dye has a static positive charge so that they are expected to interact strongly with a hydrophilic glass surface with an exposed O − group [7]. The hydrophilic glass surface promoted a wetting / dewetting process [8] of polar organic solvent upon it, which was the primary motive force realizing the self-organizing formation of submicrometer-sized particle arrays of the dye [9]. When a glass rod slid over a 100 µl ethanol solution of typically 30 µg/ml Rh6G (Fig.…”

Section: Methodsmentioning

confidence: 99%

Selective Formation of a Novel Dequenched Aggregates of Rhodamines: Comparison with J- and H-Aggregates

Tomioka

Anzai

Kamiyama

2009

e-J. Surf. Sci. Nanotechnol.

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Self-organized rhodamine aggregates prepared by wetting/dewetting process of an ethanol solution on a hydrophilic glass surface consistently exhibited fluorescence without quenching. Upon annealing, the aggregates exhibited an irreversible transition to quenched state, like H-aggregate, whereas the fluorescence spectrum was unchanged. The as grown fluorescent aggregate is a novel aggregate, neither a J-aggregate nor an H-aggregate, showing a blue-shifted excitation spectrum whereas the emission spectrum is similar to that of molecularly dispersed solution. This fluorescent aggregate was only realized in nonequilibrium by the rapid dewetting process.

show abstract

Formation of ordered mesoscopic patterns in polymer cast films by dewetting

Cited by 54 publications

References 12 publications

Selective formation of dequenched aggregates of rhodamines: comparison with J‐ and H‐aggregates

Selective formation of dequenched aggregates of rhodamines: comparison with J‐ and H‐aggregates

Self-organized patterns of microparticles in polymer films

Selective Formation of a Novel Dequenched Aggregates of Rhodamines: Comparison with J- and H-Aggregates

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