Self‐Assembly of Rod‐Coil Block Copolymers on Carbon Nanotubes: A Route toward Diverse Surface Nanostructures

Han, Yang; Cai, Chunhua; Lin, Jiaping; Gong, Shuting; Xu, Wenheng; Hu, Rui

doi:10.1002/marc.201800080

Cited by 12 publications

(20 citation statements)

References 47 publications

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“…When self‐assembly occurs in a confined space, such as spheres, cylinders (nanopores), and circles, the block copolymers are able to form diverse chiral nanostructures, including helices, helical balls, and spirals. [ 16–23 ] However, there are very limited examples to date regarding the self‐assembly of block copolymers into 2D well‐defined chiral nanoarchitectures on a confined substrate. Recent works have shown that well‐ordered nanopatterns of block copolymers can be constructed by introducing chemical or topological confinement to a substrate, [ 15,24,25 ] but these nanopatterns rarely possess chirality characteristics.…”

Section: Methodsmentioning

confidence: 99%

“…[ 28,29 ] In Step 2 , the PS microstripes on the substrate were used as templates to direct the surface self‐assembly of PBLG‐ b ‐PEG (temperature: 20 °C). [ 23,30 ] Typically, PBLG‐ b ‐PEG copolymers were dissolved in a mixed solvent of tetrahydrofuran (THF) and N,N ′‐dimethylformamide (DMF) (THF/DMF, 7/3 v/v), and the substrate was immersed in the polymer solution with the PS microstripes facing up. Then, water, a selective solvent for PEG blocks was added.…”

Section: Methodsmentioning

confidence: 99%

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2D Chiral Stripe Nanopatterns Self‐Assembled from Rod‐Coil Block Copolymers on Microstripes

Tang

Cai

et al. 2020

Macromol. Rapid Commun.

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Chiral nanoarchitectures usually possess unique and intriguing properties. However, the construction of 2D chiral nanopatterns through polymer self‐assembly is a challenge. Reported herein is the formation of chiral stripe nanopatterns through surface self‐assembly of polypeptide‐based rod‐coil block copolymers on microstripes. The nanostripes align oblique to the boundary of the microstripes, resulting in the chirality of the nanopatterns. The chirality of the nanopatterns is closely related to the width of the microstripes, i.e., a narrower width results in higher chirality. Besides, the chiral sense of the nanopatterns can be regulated by the chirality of the polypeptide blocks. This work demonstrates the transmission of chirality from polymer to nanoarchitecture on a confined surface, which can guide the preparation of nanopatterns with tuned chiral features.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

2D Chiral Stripe Nanopatterns Self‐Assembled from Rod‐Coil Block Copolymers on Microstripes

Tang

Cai

et al. 2020

Macromol. Rapid Commun.

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“…[63] Replacing the rod-like templates by PBLG loops or carbon nanotubes, the PEG-b-PBLG/PEG-b-PBDG BCPs* still enabled a helix* topology (Figure 6C). [100,104,105] Also, the same group demonstrated the co-assembly of PEG-b-PBLG/PEG-b-PBDG BCPs* with PS homopolymers into spherical assemblies with striped topologies. [106,107] It was found that chiral spiral patterns were obtainable from PEG-b-PBLG/PS and PEG-b-PBDG/PS, whereas an achiral meridian-like pattern was obtained from PEG-b-PBLG/PEG-b-PBDG/PS.…”

Section: Self-assembly Of Bcps* In Selective Solventsmentioning

confidence: 96%

Chiral transfer‐dictated self‐assembly of chiral block copolymers

Xiong

et al. 2021

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Chiral structures not only exist in nature widely, they also emerge in artificial systems, attracting myriad attentions due to their excellent mechanical, optical, electrical, and magnetic properties. Self-assembly of chiral block copolymers (BCPs*), where at least one block consists of chiral centers, represents a facile strategy to form helical/spiral/network structures with a controlled chirality. Usually, morphological chirality of BCP* assemblies was closely associated with molecular and conformational chirality of the chiral block. Generally, chiral assemblies arose from molecular chirality of BCPs*, transferring up in the assembly process and dictated the chirality at a higher hierarchical level. In contrast, notwithstanding similar assemblies could be observed from achiral BCPs under certain conditions, both left-and right-handed ones were usually observed simultaneously without a preference. Moreover, unique feature of BCPs* to access to controllable chiral assemblies affords an opportunity to prepare advanced functional materials. Herein, we dedicated a review on assembly of BCPs* into chiral assemblies in bulk/films, selective solvents, and confined spaces. The chiral transfer process in these assembly scenarios were discussed and highlighted as a key contributor to morphological chirality. Functionalities and representative applications of BCP* assemblies were also described, followed by present challenges and future prospects of BCP* self-assembly.

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“…For example, the solvent-vapor annealing method often requires complex equipment, and the procedures are time consuming. The self-assembly of block copolymers generates diverse nanostructures, [12][13][14][15] which may be a facile way to produce surface nanostructures on substrates without expensive devices or complex processes. [16,17] However, in the limited examples regarding the self-assembly of block copolymers at a selective into the solution of PBLG-b-PEG in tetrahydrofuran/N,N′dimethylformamide mixture (THF/DMF, 3/7 v/v) with the PS facing up.…”

Section: Introductionmentioning

confidence: 99%

Dot Nanopattern Self‐Assembled from Rod‐Coil Block Copolymer on Substrate

Sun

Tang

et al. 2020

Macro Chemistry & Physics

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Nanoscale dot patterns are important in various fields. However, it is still a challenge to fabricate ordered nanopatterns on substrates through a polymer self‐assembly approach. In this work, it is reported that polypeptide‐based rod‐coil block copolymers can self‐assemble into surface micelles on substrates, thus forming dot nanopatterns. The size of the surface micelles is readily adjusted by the degree of the polymerization of the block copolymers. It is found that most of the surface micelles are in a sixfold coordinated lattice, indicating an ordered array feature. Defects such as fivefold coordination arrays and sevenfold coordination arrays are also observed, which are derived from the nonuniform size of the micelles and the existence of nonspherical micelles. The experimental findings are well modelled by dissipative particle dynamics theoretical simulations, and the simulations provide more detailed information, such as the packing manner of the polymer chain in the surface micelles.

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Self‐Assembly of Rod‐Coil Block Copolymers on Carbon Nanotubes: A Route toward Diverse Surface Nanostructures

Cited by 12 publications

References 47 publications

2D Chiral Stripe Nanopatterns Self‐Assembled from Rod‐Coil Block Copolymers on Microstripes

2D Chiral Stripe Nanopatterns Self‐Assembled from Rod‐Coil Block Copolymers on Microstripes

Chiral transfer‐dictated self‐assembly of chiral block copolymers

Dot Nanopattern Self‐Assembled from Rod‐Coil Block Copolymer on Substrate

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