Two-dimensional nanoframes with dual rims

Sungjae Yoo,Doojae Park,Sungwoo Choi,Sungho Park,Jeongwon Kim

doi:10.1038/s41467-019-13738-6

Sungjae Yoo, Doojae Park + Show 3 more

Open Access

https://doi.org/10.1038/s41467-019-13738-6

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Journal: Nature Communications	Publication Date: Dec 1, 2019
Citations: 37	License type: open-access

Affiliation: Sungkyunkwan University, Hallym University

Abstract

The synthesis of highly complex two-dimensional (2D) metal nanoframes remains a great challenge. Synthetic strategies for preparing 2D metal nanoframes are few, and rational and systematic synthetic pathways to more complicated architectures have not yet been reported. Herein, we demonstrate a stepwise synthetic strategy for complex 2D metal nanoframes with a high degree of intricacy; the strategy leads to a variety of shapes, including rings, triangles, hexagons, and tripods with tailorable single or double frames in a single entity. These nanoframes of high homogeneity could be obtained through selective combination of four different chemical toolkits consisting of selective etching and deposition on certain facets, and concentric and/or eccentric regrowth by controlling the mismatches of lattice constants of metals. The resulting nanoframes were highly homogeneous in size and shape and had van der Waals interactions that maximized rim-to-rim contact, allowing them to uniquely self-assemble into large-area superstructures.

Highlights

The synthesis of highly complex two-dimensional (2D) metal nanoframes remains a great challenge
Sequential reactions composed of multiple distinct synthetic pathways[11] and the ability to combine such steps on demand will offer a powerful tool for further expanding the variety of 2D nanoplate architectures with a high degree of intricate features, mirroring the synthetic strategies often adopted in the total synthesis of complex organic molecules
In the selective etching step, one component could be etched out leaving the other component almost intact, which is useful for obtaining frameworks

Summary

Introduction

The synthesis of highly complex two-dimensional (2D) metal nanoframes remains a great challenge. We demonstrate a stepwise synthetic strategy for complex 2D metal nanoframes with a high degree of intricacy; the strategy leads to a variety of shapes, including rings, triangles, hexagons, and tripods with tailorable single or double frames in a single entity These nanoframes of high homogeneity could be obtained through selective combination of four different chemical toolkits consisting of selective etching and deposition on certain facets, and concentric and/or eccentric regrowth by controlling the mismatches of lattice constants of metals. We demonstrate a rational and stepwise synthetic strategy for nanoplates with an high degree of intricacy, leading to a gallery of various shapes such as rings, triangles, hexagons, and tripods, and having tailorable single or double frames These high homogeneous nanoframes can be obtained through selective combinations of four different chemical toolkits consisting of selective etching, rim-on deposition, and concentric and/or eccentric regrowth

Methods

Conclusion