Interfacial polymer phase segregation and self-assembly of square colloidal crystals

Janus cylinders are one-dimensional colloids that have two faces with different compositions and functionalities and are useful as building blocks for advanced functional materials. Such anisotropic objects are difficult to prepare with nanometric dimensions. Here we describe a robust and versatile strategy to form micrometer long Janus nanorods with diameters in the 10-nanometer range, by self-assembly in water of end-functionalized polymers. For the first time, the Janus topology is not a result of the phase segregation of incompatible polymer arms, but is driven by the interactions between unsymmetrical and complementary hydrogen bonded stickers. It is therefore independent of the actual polymers used and works even for compatible polymers. To illustrate their applicative potential, we show that these Janus nanorods can efficiently stabilize oil-in-water emulsions.

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Synchrotron radiation phase-contrast computed tomography study on self-assembly of polystyrene colloidal crystals via solvent evaporation

Colloid Journal ◽

10.1134/s1061933x15060095 ◽

2015 ◽

Vol 77 (6) ◽

pp. 795-801 ◽

Cited By ~ 1

Author(s):

Yanan Fu ◽

Honglan Xie ◽

Biao Deng ◽

Guohao Du ◽

Tiqiao Xiao

Keyword(s):

Computed Tomography ◽

Synchrotron Radiation ◽

Self Assembly ◽

Phase Contrast ◽

Colloidal Crystals ◽

Solvent Evaporation ◽

Radiation Phase

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Self-Assembly of “Paint-On” Colloidal Crystals Using Poly(styrene-co-N-isopropylacrylamide) Spheres

Chemistry of Materials ◽

10.1021/cm061931y ◽

2007 ◽

Vol 19 (7) ◽

pp. 1584-1591 ◽

Cited By ~ 82

Author(s):

Jonathan G. McGrath ◽

Robert D. Bock ◽

J. Michael Cathcart ◽

L. Andrew Lyon

Keyword(s):

Self Assembly ◽

Colloidal Crystals

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Transmutable Colloidal Crystals and Active Phase Separation via Dynamic, Directed Self-Assembly with Toggled External Fields

ACS Nano ◽

10.1021/acsnano.8b08076 ◽

2019 ◽

Vol 13 (1) ◽

pp. 764-771 ◽

Cited By ~ 6

Author(s):

Zachary M. Sherman ◽

James W. Swan

Keyword(s):

Phase Separation ◽

Self Assembly ◽

Colloidal Crystals ◽

Active Phase ◽

External Fields

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In Situ Visualization of Layer Transitions during Convective Self-Assembly in a Sessile Drop

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.31.117 ◽

2007 ◽

Vol 31 ◽

pp. 117-119

Author(s):

Li Gao ◽

Qing Feng Yan ◽

C.C. Wong ◽

Yet Ming Chiang

Keyword(s):

Self Assembly ◽

Sessile Drop ◽

Three Dimensional ◽

Colloidal Crystals ◽

Layer Transition ◽

Simple Method ◽

Colloidal Spheres ◽

In Situ Visualization ◽

Set Up

Convective self-assembly of colloidal spheres provides a simple method for fabricating two and three dimensional colloidal crystals. In this work, we investigated the layer transitions phenomena during colloidal self-assembly in a sessile drop by using an in-situ videoscopic set-up. The effects of surface charge, colloidal concentration, and surfactant additions were examined. The results show that the chemical environment plays an important role in colloidal self-assembly. In the case of ordered growth, different layer transition phenomena were observed when the colloidal concentration is different.

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