Simple route to ridge optical waveguide fabricated via controlled evaporative self-assembly

Kwon, Soon Woo; Byun, Myunghwan; Yoon, Dae Ho; Park, Jun‐Hee; Kim, Woo-Kyung; Lin, Zhiqun; Yang, Woo Seok

doi:10.1039/c0jm04514d

Cited by 11 publications

(5 citation statements)

References 39 publications

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“…Evaporation-induced nanowire assembly can be controlled by using a confined geometry to obtain a number of ordered nanostructures. − Zhang et al have reported a facile approach to the fabrication of large-scale regular concentric arrays of aligned organic nanowires by simply allowing solvent evaporation in a confined geometry . Figure a shows the illustration of sphere-on-flat evaporation setup during the whole evaporation process, and the direction and rate of solvent evaporation could be well-controlled inside a fume cupboard at room temperature.…”

Section: Thin Films Composed Of Assembled Ordered Nanowire Arraysmentioning

confidence: 99%

Macroscopic-Scale Assembled Nanowire Thin Films and Their Functionalities

2012

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Section: Thin Films Composed Of Assembled Ordered Nanowire Arraysmentioning

confidence: 99%

Macroscopic-Scale Assembled Nanowire Thin Films and Their Functionalities

2012

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“…In this work, we combine the "controlled evaporative self-assembly (CESA)" method [15][16][17] with double solvent scheme 18,19 to both control the crystal growth and enhance areal coverage of organic semiconductors. Since diketopyrrolopyrrole (DPP) based organic materials have attracted enormous interests for applications in both organic photovoltaics (OPV) and OTFTs, a derivative of DPP, 2,5-Di-(2-ethylhexyl)-3,6-bis(5 [20][21][22][23][24][25][26][27] approach.…”

Section: Introductionmentioning

confidence: 99%

Solution-grown small-molecule organic semiconductor with enhanced crystal alignment and areal coverage for organic thin film transistors

Chen

et al. 2015

AIP Advances

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Drop casting of small-molecule organic semiconductors typically forms crystals with random orientation and poor areal coverage, which leads to significant performance variations of organic thin-film transistors (OTFTs). In this study, we utilize the controlled evaporative self-assembly (CESA) method combined with binary solvent system to control the crystal growth. A small-molecule organic semiconductor,2,5-Di-(2-ethylhexyl)-3,6-bis(5″-n-hexyl-2,2′,5′,2″]terthiophen-5-yl)-pyrrolo[3,4-c]pyrrole-1,4-dione (SMDPPEH), is used as an example to demonstrate the effectiveness of our approach. By optimizing the double solvent ratios, well-aligned SMDPPEH crystals with significantly improved areal coverage were achieved. As a result, the SMDPPEH based OTFTs exhibit a mobility of 1.6 × 10−2 cm2/V s, which is the highest mobility from SMDPPEH ever reported.

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“…In parallel to the intensive studies on the self-assembly of block copolymers free of intervention (under constant concentration and fixed temperature, for example), self-assembly of compound systems (e.g., mixtures of block copolymers and NPs) under more complex conditions, such as external intervention − and controlled evaporation, − has also been of great interest. In this case, self-assembly of block copolymers has been employed as a tool for the fabrication of nanomaterials.…”

Section: General Procedures For the Growth Of Block Copolymer Nanoshe...mentioning

confidence: 99%

Blossoming of Nanosheet Structures via a Disturbed Self-Assembly

Wang

Zhong

et al. 2014

Nano Lett.

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Nanofabrication has been critical in all kinds of nanotechnology, not only for achieving various nanostructures or nanosystems but also for the application of the nanotechnology. To achieve controllable but simple nanofabrication is one of the central aspirations for many research communities; here, for the first time, we report the growth of nanosheet structures simply by introducing internal disturbances (adding nanoparticles and surface tension) or external disturbances (deformations) to the self-assembly of copolymers induced by evaporation. Nanoparticles, curved surface, and deformations by such as writing or extension have been employed to demonstrate the sensitivity of the nanosheet structures to various disturbances. Finally, a physical model has been proposed to explain how the disturbances contribute to the formation of the nanosheet structures. These significant results indicate a scalable, writable, cost-effective and environmentally friendly nanotechnology that will stimulate new nanofabrication research.

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Simple route to ridge optical waveguide fabricated via controlled evaporative self-assembly

Cited by 11 publications

References 39 publications

Macroscopic-Scale Assembled Nanowire Thin Films and Their Functionalities

Macroscopic-Scale Assembled Nanowire Thin Films and Their Functionalities

Solution-grown small-molecule organic semiconductor with enhanced crystal alignment and areal coverage for organic thin film transistors

Blossoming of Nanosheet Structures via a Disturbed Self-Assembly

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