Control of crystal morphology of a fluorescent charge transfer complex by dewetting on a mica surface

Karthaus, Olaf; Nagata, Satoshi; Kiyono, Yuji; Ito, Syoji; Miyasaka, Hiroshi

doi:10.1016/j.colsurfa.2007.04.141

Cited by 8 publications

(7 citation statements)

References 16 publications

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“…The control of crystal morphology is important for many fields and applications, such as in the fabrication of nano-scale devices, in the uptake of lipophilic vitamins and drugs, and in nonlinear optics (NLO). 22,23 Our results are consisted with work by Lofgren et al who showed that with a substantial degree of supercooling, curved, and branched crystal morphologies can be produced. 24 Similarly, Cheng et al have reported that the temperature and the solute concentration distribution determine the crystal shape.…”

Section: Article Wileyonlinelibrarycom/appsupporting

confidence: 75%

Reinforcing thermosets using crystalline desoxyanisoin structures

Ware

Lesser

2013

J of Applied Polymer Sci

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This article presents results on the potential of using crystalline flame retardants for thermoset reinforcement. The approach involves introducing reinforcement in thermosetting polymers through low molecular weight crystallizable additives. Thermally induced phase separation (TIPS) and crystallization of desoxyanisoin in diglycidylether of bisphenol‐A (DGEBA) epoxy monomer were investigated. Small angle light scattering and polarized optical microscopy were utilized to monitor phase separation and the crystallization of desoxyanisoin in DGEBA at different concentrations. Reaction induced phase separation (RIPS) with polyetheramine was carried out under isothermal and temperature gradient curing conditions. Altering the cure schedule resulted in a rich range of morphologies due to the competition between TIPS and RIPS. During isothermal cure, straight fiber‐like anisotropic crystals on a centimeter length scale developed. In contrast, thermal gradients frustrated the crystal growth and resulted in complex and rich morphologies. Desoxyanisoin provided marginal epoxy thermoset reinforcement at 10 vol %. However, the additive did not increase the thermoset flammability retardancy. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39853.

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Section: Article Wileyonlinelibrarycom/appsupporting

confidence: 75%

Reinforcing thermosets using crystalline desoxyanisoin structures

Ware

Lesser

2013

J of Applied Polymer Sci

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“…A hot solution of pentacene in trichlorobenzene is placed in a heated roller apparatus, and the roller is pulled over the substrate with a constant speed. Crystallization at the receding solution edge leads to the formation of crystal seeds that grow into parallel fibers while the solution recedes [6]. By changing the roller speed and substrate temperature, we were able to produce different pentacene morphologies, as can be seen in Fig.…”

Section: Resultsmentioning

confidence: 67%

Preparation of Pentacene Organic Field Effect Transistors by a Wet Process and their Carrier Mobilities

Kubo

Nishide

Sasabe

et al. 2009

e-J. Surf. Sci. Nanotechnol.

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Dewetting-induced crystallization from hot trichlorobenzene solutions led to the formation of aligned pentacene microfibers or plates, depending on preparation conditions. Fibers with a length of several hundred micrometer and a width of less than one micrometer can be prepared. Bottom-contact field effect transistors with fibers that were oriented perpendicular to the source and drain electrodes showed carrier mobilities as high as 0.04 cm 2 /Vs. In comparison, plate-like pentacene gave corrected mobilities of up to 0.2 cm 2 /Vs.

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“…The solution processing and self-organization by dissipative structures to pattern organic materials for electronics and photonics got another boost by the discovery that some low molar mass compounds crystallize [17] at the solution edge during the development of the fingering instability, creating equidistant lines of single crystalline fibers with a high aspect ratio. The charge carrier mobility in crystalline fibers made of pentacene [18] is in the range of 0.1 -1 cm 2 V -1 s -1 [19] which is in the same range as the values reported by others for bottom contact field effect transistors (FETs) [20,21].…”

Section: Electronic and Photonics Applicationsmentioning

confidence: 99%

Self-organization of organic electronics and photonics materials by microdewetting

et al. 2010

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Mesoscopic structures are important for photonics applications. Here we describe the preparation of (sub)micrometer droplet or line patterns of organic semiconductors by a simple casting process. Dewetting during the solvent evaporation leads to the formation of regular structures that are caused by the so-called dissipative structures that develop during nonequilibrium conditions. Controlling the casting conditions (concentration, speed, etc) we were able to tailor the resulting patterns. Examples for the patterns are luminescent or conducting aggregates that can be used as organic transistors. Coating the self-organized structures with metals is an easy process to produce patterend metal surfaces, which can be sued in plasmonics

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Control of crystal morphology of a fluorescent charge transfer complex by dewetting on a mica surface

Cited by 8 publications

References 16 publications

Reinforcing thermosets using crystalline desoxyanisoin structures

Reinforcing thermosets using crystalline desoxyanisoin structures

Preparation of Pentacene Organic Field Effect Transistors by a Wet Process and their Carrier Mobilities

Self-organization of organic electronics and photonics materials by microdewetting

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