Rational Synthesis of 1D Hyperbranched Heterostructures with Enhanced Optoelectronic Performance

Li, Xuefei; Zhang, Yadong; Zhai, Li; Tao, Chen‐Lei; Xu, Dan; Mu, Zhangyan; Ding, Mengning; Wu, Xue‐Jun

doi:10.1002/anie.202012537

Cited by 14 publications

(15 citation statements)

References 37 publications

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“…The closest spot in the FFT pattern indicates the intersecting planes with a d-spacing of 0.36 nm, which is close to {10 1̅ 0} planes of wurtzite CdSe (0.37 nm) and CdS (0.36 nm). Note that the lattice mismatch between CdSe and CdS is very small (∼3.8%), 13 thus only diffused spots appeared on the FFT pattern, which results from the partial overlapping between CdSe and CdS. Furthermore, EDS elemental mapping clearly shows that the Cd element is distributed homogeneously over the heterostructure, whereas Se is confined to the central rod-shaped area and S is distributed on the periphery of the central area, indicating the successful growth of CdS NPLs on the 1D CdSe backbones (Figure 2f).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…11,12 The seeded growth method has been proven to be a prototypical synthetic approach to various heterostructures. 13,14 The key to the synthesis is to ensure the heterogeneous nucleation and growth of a secondary material on the pregrown seeds. Therefore, the 1D/2D heterostructures require a distinct growth behavior during secondary growth compared with that of seeds.…”

Section: ■ Introductionmentioning

confidence: 99%

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Generalized Colloidal Approach for Preparing Epitaxial 1D/2D Heterostructures

Jiang

et al. 2022

Chem. Mater.

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1D/2D heterostructures, in particular those that consist of a 1D nanorod core and a 2D nanoplate (NPL) shell, enable the combination of the merits and mitigation of the demerits of distinct dimensionalities into one system, providing a new platform to study their intriguing properties. However, there is still lack of effective strategies to rationally integrate the components with different dimensionalities together. Here, we report a general seeded growth method for the construction of epitaxial 1D/2D heterostructures with a variety of compositional combinations, in which ordered 2D NPL arrays are vertically grown along the c-axis of 1D wurtzite nanomaterials, including II− VI and I−III−VI 2 semiconductors. The loading densities of NPLs on the 1D nanomaterials are very high, up to 280 piece/μm. The same crystal structure of the grown NPLs and 1D seeds ensures the epitaxial growth relationship between these two materials. It is found that the secondary 2D growth mode is a kinetic-dominated process, in addition to the effect of the anionic sulfur precursor. The as-prepared 1D/2D CdSe/CdS heterostructures exhibit enhanced activity for photocatalytic hydrogen evolution compared to that of the single-component CdSe NRs and CdS/CdS homostructures. This work greatly enriches the variety and architecture of the available heterostructures and also provides a toolbox for exploring their promising applications.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Generalized Colloidal Approach for Preparing Epitaxial 1D/2D Heterostructures

Jiang

et al. 2022

Chem. Mater.

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“…Furthermore, organic micro/nanomaterials inherit the merits of organic semiconductor molecules such as tailorable molecular structure, mechanical flexibility, low-temperature solution processing 14 – 18 . Compared with single structure, organic heterostructures (OHSs) exhibit unique advantages in integrated optoelectronics, benefiting from their novel performance at heterojunction and multiple functions 19 – 22 . Among them, one-dimensional (1D) triblock heterostructures with segregated domains and spatial multi-color emissions can manipulate photons and electrons, are particularly attractive micro/nanomaterials for a large variety of applications 23 – 25 .…”

Section: Introductionmentioning

confidence: 99%

Lattice-mismatch-free growth of organic heterostructure nanowires from cocrystals to alloys

Wang

et al. 2022

Nat Commun

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Organic heterostructure nanowires, such as multiblock, core/shell, branch-like and related compounds, have attracted chemists’ extensive attention because of their novel physicochemical properties. However, owing to the difficulty in solving the lattice mismatch of distinct molecules, the construction of organic heterostructures at large scale remains challenging, which restricts its wide use in future applications. In this work, we define a concept of lattice-mismatch-free for hierarchical self-assembly of organic semiconductor molecules, allowing for the large-scale synthesis of organic heterostructure nanowires composed of the organic alloys and cocrystals. Thus, various types of organic triblock nanowires are prepared in large scale, and the length ratio of different segments of the triblock nanowires can be precisely regulated by changing the stoichiometric ratio of different components. These results pave the way towards fine synthesis of heterostructures in a large scale and facilitate their applications in organic optoelectronics at micro/nanoscale.

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“…Self-assembly of semiconducting block copolymers is an effective strategy to control the morphology that is required for optimizing the optoelectronic performance. 23 However, such block copolymers are commonly synthesized via the connection of two preformed homopolymers, or decorating a polymer with an active terminal for block copolymerization of a new monomer. 24 These strategies require tedious synthetic manipulation and can be very inefficient.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Precise synthesis of π-conjugated polymers is of considerable interest because they can be used as semiconducting materials in optoelectronic devices. Self-assembly of semiconducting block copolymers is an effective strategy to control the morphology that is required for optimizing the optoelectronic performance . However, such block copolymers are commonly synthesized via the connection of two preformed homopolymers, or decorating a polymer with an active terminal for block copolymerization of a new monomer .…”

Section: Introductionmentioning

confidence: 99%

Precise Synthesis of π-Conjugated Block Copolymers and Polymerization-Induced Chiral Self-Assembly toward Helical Nanofibers with Circularly Polarized Luminescence

Jiang

et al. 2021

ACS Appl. Bio Mater.

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Precise synthesis and efficient self-assembly of semiconducting polymers are of great interest. Herein, we report the controlled synthesis of π-conjugated poly(phenyl isocyanide)-b-poly(phenyleneethylene) (PPI-b-PPE) copolymers via chain extension of ethynyl 4-iodobenzene initiated by Pd(II)-terminated helical poly(phenyl isocyanide) (PPI). The in-situ-generated block copolymers self-assembled into various supramolecular architectures depending on the PPE length. The helical PPI segment induced the block copolymers with an appropriate PPE length self-assemble into helical nanofibers with a controlled size and defined helicity. Interestingly, the chiral assemblies of the block copolymers exhibit intense optical activity and emit clear circularly polarized luminescence.

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Rational Synthesis of 1D Hyperbranched Heterostructures with Enhanced Optoelectronic Performance

Cited by 14 publications

References 37 publications

Generalized Colloidal Approach for Preparing Epitaxial 1D/2D Heterostructures

Generalized Colloidal Approach for Preparing Epitaxial 1D/2D Heterostructures

Lattice-mismatch-free growth of organic heterostructure nanowires from cocrystals to alloys

Precise Synthesis of π-Conjugated Block Copolymers and Polymerization-Induced Chiral Self-Assembly toward Helical Nanofibers with Circularly Polarized Luminescence

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