scholarly journals Polymer blend directed anisotropic self-assembly toward mesoporous inorganic bowls and nanosheets

2020 ◽  
Vol 6 (33) ◽  
pp. eabb3814 ◽  
Author(s):  
Seongseop Kim ◽  
Jongkook Hwang ◽  
Jisung Lee ◽  
Jinwoo Lee
Keyword(s):  
Block Copolymer ◽  
Transition Metal Oxides ◽  
Self Assembly ◽  
High Performance ◽  
Ternary Phase ◽  
Inorganic Materials ◽  
Two Dimensional ◽  
Controllable Synthesis ◽  
2D Nanosheets ◽  
Synthesis Approach

Anisotropic mesoporous inorganic materials have attracted great interest due to their unique and intriguing properties, yet their controllable synthesis still remains a great challenge. Here, we develop a simple synthesis approach toward mesoporous inorganic bowls and two-dimensional (2D) nanosheets by combining block copolymer (BCP)–directed self-assembly with asymmetric phase migration in ternary-phase blends. The homogeneous blend solution spontaneously self-assembles to anisotropically stacked hybrids as the solvent evaporates. Two minor phases—BCP/inorganic precursor and homopolystyrene (hPS)—form closely stacked, Janus domains that are dispersed/confined in the major homopoly(methyl methacrylate) (hPMMA) matrix. hPS phases are partially covered by BCP-rich phases, where ordered mesostructures develop. With increasing the relative amount of hPS, the anisotropic shape evolves from bowls to 2D nanosheets. Benefiting from the unique bowl-like morphology, the resulting transition metal oxides show promise as high-performance anodes in potassium-ion batteries.

scholarly journals Semi-conducting 2D rectangles with tunable length via uniaxial living crystallization-driven self-assembly of homopolymer

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Sanghee Yang ◽  
Sung-Yun Kang ◽  
Tae-Lim Choi
Keyword(s):  
Block Copolymer ◽  
Conjugated Polymers ◽  
Self Assembly ◽  
Radial Growth ◽  
Two Dimensional ◽  
First Order ◽  
Aspect Ratios ◽  
First Order Kinetics ◽  
2D Nanosheets ◽  
Kinetics Of

AbstractSemi-conducting two-dimensional (2D) nanoobjects, prepared by self-assembly of conjugated polymers, are promising materials for optoelectronic applications. However, no examples of self-assembled semi-conducting 2D nanosheets whose lengths and aspect ratios are controlled at the same time have been reported. Herein, we successfully prepared uniform semi-conducting 2D sheets using a conjugated poly(cyclopentenylene vinylene) homopolymer and its block copolymer by blending and heating. Using these as 2D seeds, living crystallization-driven self-assembly (CDSA) was achieved by adding the homopolymer as a unimer. Interestingly, unlike typical 2D CDSA examples showing radial growth, this homopolymer assembled only in one direction. Owing to this uniaxial growth, the lengths of the 2D nanosheets could be precisely tuned from 1.5 to 8.8 μm with narrow dispersity according to the unimer-to-seed ratio. We also studied the growth kinetics of the living 2D CDSA and confirmed first-order kinetics. Subsequently, we prepared several 2D block comicelles (BCMs), including penta-BCMs in a one-shot method.

Controllable Synthesis of Ultrathin Layered Transition Metallic Hydroxide/Zeolitic Imidazolate Framework-67 Hybrid Nanosheets for High-Performance Supercapacitors

2021 ◽  
Author(s):  
Chunli Liu ◽  
Yang Bai ◽  
Ji Wang ◽  
Ziming Qiu ◽  
Huan Pang
Keyword(s):  
Charge Transfer ◽  
Energy Conversion ◽  
High Performance ◽  
2D Materials ◽  
Two Dimensional ◽  
Controllable Synthesis ◽  
Zeolitic Imidazolate Framework ◽  
Fast Charge ◽  
Energy Conversion And Storage ◽  
And Storage

Two-dimensional (2D) materials with structures having diverse features are promising for application in energy conversion and storage. A stronger layered orientation can guarantee fast charge transfer along the 2D planes...

Soft template assisted self-assembly: a general strategy toward two-dimensional molecular crystals for high-performance organic field-effect transistors

2022 ◽  
Author(s):  
Xinzi Tian ◽  
Jiarong Yao ◽  
Siyu Guo ◽  
Zhaofeng Wang ◽  
Yanling Xiao ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Self Assembly ◽  
High Performance ◽  
Field Effect Transistors ◽  
Molecular Crystals ◽  
Soft Template ◽  
General Strategy ◽  
Two Dimensional ◽  
Organic Field Effect Transistors ◽  
Intrinsic Properties

Two-dimensional molecular crystals (2DMCs) are highly desirable to probe the intrinsic properties in organic semiconductors and are promising candidates for constructing high-performance optoelectronic devices. Liquids such as water are favorable...

scholarly journals Molecular interaction balanced one- and two-dimensional hybrid nanoarchitectures for high-performance supercapacitors

2019 ◽  
Vol 21 (40) ◽  
pp. 22283-22292 ◽  
Author(s):  
Mingxia Lu ◽  
Gang Wang ◽  
Bo Li ◽  
Jing Chen ◽  
Jingchao Zhang ◽  
...  
Keyword(s):  
Molecular Interactions ◽  
Self Assembly ◽  
Molecular Interaction ◽  
High Performance ◽  
Charge Storage ◽  
Two Dimensional ◽  
Assembly Process ◽  
Equilibrium Thermodynamic ◽  
Good Separation ◽  
Ratio Dependent

Stepwise ultrasonication and self-assembly process enables good separation between disequilibrium and equilibrium thermodynamic molecular interactions, which allow excellent electrochemical charge storage based on ratio-dependent 1D–2D hybridisation.

“Raft” Formation by Two-Dimensional Self-Assembly of Block Copolymer Rod Micelles in Aqueous Solution

2014 ◽  
Vol 126 (34) ◽  
pp. 9146-9149 ◽  
Author(s):  
Georgios Rizis ◽  
Theo G. M. van de Ven ◽  
Adi Eisenberg
Keyword(s):  
Aqueous Solution ◽  
Block Copolymer ◽  
Self Assembly ◽  
Two Dimensional

“Raft” Formation by Two-Dimensional Self-Assembly of Block Copolymer Rod Micelles in Aqueous Solution

2014 ◽  
Vol 53 (34) ◽  
pp. 9000-9003 ◽  
Author(s):  
Georgios Rizis ◽  
Theo G. M. van de Ven ◽  
Adi Eisenberg
Keyword(s):  
Aqueous Solution ◽  
Block Copolymer ◽  
Self Assembly ◽  
Two Dimensional

Freestanding MXene-hydrogel via critical density controlled self-assembly: high performance energy storage with ultrahigh capacitive vs diffusion limited contribution

2021 ◽  
Author(s):  
Uday Narayan Maiti ◽  
Pronoy Dutta ◽  
Amalika Patra ◽  
Sujit Kumar Deb ◽  
Anirban Sikdar ◽  
...  
Keyword(s):  
Energy Storage ◽  
Self Assembly ◽  
High Performance ◽  
Critical Density ◽  
Two Dimensional ◽  
Macroscopic Scale ◽  
Diffusion Limited ◽  
Two Dimensional Materials ◽  
Full Utilization

Solvated network of two-dimensional materials in the form of hydrogel offers a unique platform for full utilization of surface dominated properties at the macroscopic scale. However, development of such hydrogels...

Self-Assembly Influenced by Geometrical Orientation of Nanosheet in Layered Nanoparticles

2015 ◽  
Vol 14 (01n02) ◽  
pp. 1460018
Author(s):  
Kazuomi Numata ◽  
Kiminori Sato
Keyword(s):  
Self Assembly ◽  
Uniaxial Pressure ◽  
Two Dimensional ◽  
Positronium Lifetime ◽  
Self Assembled ◽  
2D Nanosheets ◽  
Ordered State

An influence of geometrical orientation of two-dimensional (2D) nanosheets on long-term rheological self-assembly with the aid of H 2 O molecules is investigated by positronium lifetime spectroscopy. It is found that self-assembly is accelerated for the well self-assembled sample due to in-plane ordering of 2D nanosheets. The acceleration of self-assembly is further enhanced for the sample prepared by uniaxial pressure compaction owing to stacking of 2D nanosheets with a highly ordered state. The present results evidence that self-assembly is significantly influenced by local geometrical orientation of 2D nanosheets in layered nanoparticles.

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