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Unidirectional Alignment of AgCN Microwires on Distorted Transition Metal Dichalcogenide Crystals

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Title
Unidirectional Alignment of AgCN Microwires on Distorted Transition Metal Dichalcogenide Crystals
Author(s)
Myeongjin Jang; Hyeonhu Bae; Yangjin Lee; Woongki Na; Byungkyu Yu; Soyeon Choi; Hyeonsik Cheong; Hoonkyung Lee; Kwanpyo Kim
Publication Date
2021-02-24
Journal
ACS APPLIED MATERIALS & INTERFACES, v.13, no.7, pp.8727 - 8735
Publisher
AMER CHEMICAL SOC
Abstract
Van der Waals epitaxy on the surface of twodimensional (2D) layered crystals has gained significant research interest for the assembly of well-ordered nanostructures and fabrication of vertical heterostructures based on 2D crystals. Although van der Waals epitaxial assembly on the hexagonal phase of transition metal dichalcogenides (TMDCs) has been relatively well characterized, a comparable study on the distorted octahedral phase (1T' or T-d) of TMDCs is largely lacking. Here, we investigate the assembly behavior of one-dimensional (1D) AgCN microwires on various distorted TMDC crystals, namely 1T'MoTe2, T-d-WTe2, and 1T'-ReS2. The unidirectional alignment of AgCN chains is observed on these crystals, reflecting the symmetry of underlying distorted TMDCs. Polarized Raman spectroscopy and transmission electron microscopy directly confirm that AgCN chains display the remarkable alignment behavior along the distorted chain directions of underlying TMDCs. The observed unidirectional assembly behavior can be attributed to the favorable adsorption configurations of 1D chains along the substrate distortion, which is supported by our theoretical calculations and observation of similar assembly behavior from different cyanide chains. The aligned AgCN microwires can be harnessed as facile markers to identify polymorphs and crystal orientations of TMDCs.
URI
https://pr.ibs.re.kr/handle/8788114/10801
DOI
10.1021/acsami.0c20246
ISSN
1944-8244
Appears in Collections:
Center for Nanomedicine (나노의학 연구단) > 1. Journal Papers (저널논문)
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