A General Strategy for Assembling Nanoparticles in One Dimension

Su, Bin; Zhang, Cong; Chen, Shuoran; Zhang, Xingye; Chen, Linfeng; Wu, Yuchen; Nie, Yiwen; Kan, Xiaonan; Song, Yanlin; Jiang, Lei

doi:10.1002/adma.201305249

Cited by 94 publications

(101 citation statements)

References 47 publications

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“…Parts c and c′ of Scheme 1 show the procedure of fabricating nanopillar and nanohole arrays with the obtained colloidal stripes as an etching mask or template. The nanopillar arrays were obtained by dry etching from the as-prepared colloidal stripes on a silicon wafer in the chamber of a PlasmaLab System100 (Oxford Instruments) with etchant gases of SF 6 and C 4 F 8 at flow rates of 12 and 27 sccm, an RF power of 700 W, and a bias voltage of 25 V. The etching duration ranged from 30 to 120 s to produce nanopillar arrays with various morphologies. The nanohole arrays were formed by dry etching, similar to the fabrication procedure for nanopillar arrays, the main difference lying in the prior process of sputtering deposition of 100 nm thick aluminum and the lift-off process to remove the colloidal stripe template.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Periodic Parallel Array of Nanopillars and Nanoholes Resulting from Colloidal Stripes Patterned by Geometrically Confined Evaporative Self-Assembly for Unique Anisotropic Wetting

Wang

Shao

et al. 2014

ACS Appl. Mater. Interfaces

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In this paper we present an economical process to create anisotropic microtextures based on periodic parallel stripes of monolayer silica nanoparticles (NPs) patterned by geometrically confined evaporative self-assembly (GCESA). In the GCESA process, a straight meniscus of a colloidal dispersion is initially formed in an opened enclosure, which is composed of two parallel plates bounded by a U-shaped spacer sidewall on three sides with an evaporating outlet on the fourth side. Lateral evaporation of the colloidal dispersion leads to periodic "stick-slip" receding of the meniscus (evaporative front), as triggered by the "coffee-ring" effect, promoting the assembly of silica NPs into periodic parallel stripes. The morphology of stripes can be well controlled by tailoring process variables such as substrate wettability, NP concentration, temperature, and gap height, etc. Furthermore, arrayed patterns of nanopillars or nanoholes are generated on a silicon wafer using the as-prepared colloidal stripes as an etching mask or template. Such arrayed patterns can reveal unique anisotropic wetting properties, which have a large contact angle hysteresis viewing from both the parallel and perpendicular directions in addition to a large wetting anisotropy.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Periodic Parallel Array of Nanopillars and Nanoholes Resulting from Colloidal Stripes Patterned by Geometrically Confined Evaporative Self-Assembly for Unique Anisotropic Wetting

Wang

Shao

et al. 2014

ACS Appl. Mater. Interfaces

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“…The solution or suspension of nanomaterials has been restricted in the mezzanine space, which lies between a flat substrate with low surface energy (such as poly(dimethylsiloxane) (PDMS) films or octadecyltrichlorosilane‐treated silicon wafer)) and a pillar‐patterned silicon template (Figure b). With the evaporation of solvent, micropillar arrays which served as the pinpoints of curved liquid body will guide the liquid–solid–gas three‐phase contact line (TCL) to spread at the designed direction. Micrometer scaled liquid patterns among micropillars have been achieved, which are the consequence of the simple area‐minimizing principle.…”

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confidence: 99%

A 3D Self‐Shaping Strategy for Nanoresolution Multicomponent Architectures

Huang

et al. 2017

Advanced Materials

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3D printing or fabrication pursues the essential surface behavior manipulation of droplets or a liquid for rapidly and precisely constructing 3D multimaterial architectures. Further development of 3D fabrication desires a self-shaping strategy that can heterogeneously integrate functional materials with disparate electrical or optical properties. Here, a 3D liquid self-shaping strategy is reported for rapidly patterning materials over a series of compositions and accurately achieving micro- and nanoscale structures. The predesigned template selectively pins the droplet, and the surface energy minimization drives the self-shaping processing. The as-prepared 3D circuits assembled by silver nanoparticles carry a current of 208-448 µA at 0.01 V impressed voltage, while the 3D architectures achieved by two different quantum dots show noninterfering optical properties with feature resolution below 3 µm. This strategy can facilely fabricate micro-nanogeometric patterns without a modeling program, which will be of great significance for the development of 3D functional devices.

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“…The latter can also be employed in mechanical contexts, for example, as flexible artificial flagella or cilia141516. Compared to other methodologies such as lithography217, cluster-assisted assembly18 and colloidal polymerization19, field-directed assembly in electro- or magneto-rheological fluids2021 provides a simple, efficient22 and controllable approach for particle chain formation. However, it suffers from two major limitations that hinder its application, for example, in electronic-device manufacturing.…”

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confidence: 99%

Formation of printable granular and colloidal chains through capillary effects and dielectrophoresis

et al. 2017

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One-dimensional conductive particle assembly holds promise for a variety of practical applications, in particular for a new generation of electronic devices. However, synthesis of such chains with programmable shapes outside a liquid environment has proven difficult. Here we report a route to simply ‘pull' flexible granular and colloidal chains out of a dispersion by combining field-directed assembly and capillary effects. These chains are automatically stabilized by liquid bridges formed between adjacent particles, without the need for continuous energy input or special particle functionalization. They can further be deposited onto any surface and form desired conductive patterns, potentially applicable to the manufacturing of simple electronic circuits. Various aspects of our route, including the role of particle size and the voltages needed, are studied in detail. Looking towards practical applications, we also present the possibility of two-dimensional writing, rapid solidification of chains and methods to scale up chain production.

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A General Strategy for Assembling Nanoparticles in One Dimension

Cited by 94 publications

References 47 publications

Periodic Parallel Array of Nanopillars and Nanoholes Resulting from Colloidal Stripes Patterned by Geometrically Confined Evaporative Self-Assembly for Unique Anisotropic Wetting

Periodic Parallel Array of Nanopillars and Nanoholes Resulting from Colloidal Stripes Patterned by Geometrically Confined Evaporative Self-Assembly for Unique Anisotropic Wetting

A 3D Self‐Shaping Strategy for Nanoresolution Multicomponent Architectures

Formation of printable granular and colloidal chains through capillary effects and dielectrophoresis

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