“Capillary‐Bridge Lithography” for Patterning Organic Crystals toward Mode‐Tunable Microlaser Arrays

Feng, Jiangang; Jiang, Xiangyu; Yan, Xiaoxu; Wu, Yuchen; Su, Bin; Fu, Hongbing; Yao, Jiannian; Jiang, Lei

doi:10.1002/adma.201603652

Cited by 100 publications

(140 citation statements)

References 40 publications

(50 reference statements)

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“…Methods and Materials : Stripe‐structured and ring‐structured silicon pillar templates were designed in this experiment. The stripe‐structured silicon pillar template was prepared according to previous reports, with embossment width of 2 µm, gap of 5 µm, and height of 20 µm. The as‐prepared microring had the interior and exterior diameters of 6 and 10 µm, height and distance between neighboring pillars, 20 and 10 µm, respectively.…”

Section: Methodsmentioning

confidence: 99%

Patterning of Discotic Liquid Crystals with Tunable Molecular Orientation for Electronic Applications

Zou

Wang

et al. 2018

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The large-area formation of functional micropatterns with liquid crystals is of great significance for diversified applications in interdisciplinary fields. Meanwhile, the control of molecular alignment in the patterns is fundamental and prerequisite for the adequate exploitation of their photoelectric properties. However, it would be extremely complicated and challenging for discotic liquid crystals (DLCs) to achieve the goal, because they are insensitive to external fields and surface chemistry. Herein, a simple method of patterning and aligning DLCs on flat substrates is disclosed through precise control of the formation and dewetting of the capillary liquid bridges, within which the DLC molecules are confined. Large-area uniform alignment occurs spontaneously due to directional shearing force when the solvent is slowly evaporated and programmable patterns could be directly generated on desired substrates. Moreover, the in-plane column direction of DLCs is tunable by slightly tailoring their chemical structures which changes their self-assembly behaviors in liquid bridges. The patterned DLCs show molecular orientation-dependent charge transport properties and are promising for templating self-assembly of other materials. The study provides a facile method for manipulation of the macroscopic patterns and microscopic molecular orientation which opens up new opportunities for electronic applications of DLCs.

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Section: Methodsmentioning

confidence: 99%

Patterning of Discotic Liquid Crystals with Tunable Molecular Orientation for Electronic Applications

Zou

Wang

et al. 2018

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] Therefore, the multidimensional positioning of nanoparticle can tailor the architecture properties. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] Therefore, the multidimensional positioning of nanoparticle can tailor the architecture properties.…”

Section: Colloidal Particlesmentioning

confidence: 99%

“…To enhance the ability of directing nanoparticles into an ordered architecture through the capillary assembly, several strategies have been developed. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] Therefore, the multidimensional positioning of nanoparticle can tailor the architecture properties. [49] However, this strategy primarily focuses on the fabrication of 2D architectures, which is restricted by its growth orientation.…”

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confidence: 99%

Manipulation of Colloidal Particles in Three Dimensions via Microfluid Engineering

et al. 2018

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The assembly of nanoparticles into ordered 3D architectures, which requires more complex spatial arrangements of nanoparticles than 2D, is essential to develop new nano- or microdevices in the fields of biotechnology, magnetic devices, catalysis, and optoelectronics. However, because of the long-distance interactions among the nanoparticles or the applied external force, the movement of nanoparticles cannot be precisely controlled, particularly in multidimensional architectures. Therefore, controlling the 3D architecture remains challenging. In this study, the 3D architecture engineering of colloidal particles by manipulating the microfluid morphology is reported, which produces controllable cross-sections and shapes. The modification of the microfluid morphology, which can be achieved by tuning the physical parameters of the system and the pinning point number, affects the nucleation location, growth rate, and orientation of the architectures. Because of the controllable morphology, the waveguiding distance and direction of 3D architectures can be manipulated. Thus, this study highlights the opportunity for creating morphology-controlled 3D architectures with potential applications in optoelectronics.

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“…Printing light‐emitting devices from liquid dispersions of nanoparticles is an elegant way to bring the active component into the devices without the challenges of pick‐and‐place at small scales . It introduces challenges of its own, however, and the printing of QDs at sufficiently high resolutions with overall good emission quality is difficult .…”

Section: Introductionmentioning

confidence: 99%

High‐Resolution Inkjet Printing of Quantum Dot Light‐Emitting Microdiode Arrays

Yang

Zhang

Kang

et al. 2019

Advanced Optical Materials

174

122

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The direct printing of microscale quantum dot light‐emitting diodes (QLEDs) is a cost‐effective alternative to the placement of pre‐formed LEDs. The quality of printed QLEDs currently is limited by nonuniformities in droplet formation, wetting, and drying during inkjet printing. Here, optimal ink formulation which can suppress nonuniformities at the pixel and array levels is demonstrated. A solvent mixture is used to tune the ejected droplet size, ensure wetting, and provoke Marangoni flows that prevent coffee stain rings. Arrays of green QLED devices are printed at a resolution of 500 pixels in.−1 with a maximum luminance of ≈3000 cd m−2 and a peak current efficiency of 2.8 cd A−1. The resulting array quality is sufficient to print displays at state‐of‐the‐art resolutions.

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“Capillary‐Bridge Lithography” for Patterning Organic Crystals toward Mode‐Tunable Microlaser Arrays

Cited by 100 publications

References 40 publications

Patterning of Discotic Liquid Crystals with Tunable Molecular Orientation for Electronic Applications

Patterning of Discotic Liquid Crystals with Tunable Molecular Orientation for Electronic Applications

Manipulation of Colloidal Particles in Three Dimensions via Microfluid Engineering

High‐Resolution Inkjet Printing of Quantum Dot Light‐Emitting Microdiode Arrays

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