Solution‐Processed 1D Wurtzite ZnS Nanostructures with Controlled Crystallographic Orientation and Tunable Band‐Edge Emission

1D compound semiconductor nanomaterials possess unique physicochemical properties that strongly depend on their size, composition, and structures. ZnS has been widely investigated as one of the most important semiconductors, and the control of crystallographic orientation of 1D ZnS nanostructures is...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2024-01, Vol.20 (4), p.e2303560-n/a
Main Authors: Cai, Jing, Liu, Peifeng, Lei, Junyu, Zhang, Yongliang, Xiang, Yu, Wang, Xizhang, Wu, Qiang, Hu, Zheng
Format: Article
Language:English
Subjects:
1D w‐ZnS nanostructures
band‐edge emission
crystallographic growth direction
Crystallography
inherent growth mechanism
Interfacial energy
Nanomaterials
Nanorods
Nanostructure
Nucleation
Orientation
solution process
Wurtzite
Zinc sulfide
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Summary:1D compound semiconductor nanomaterials possess unique physicochemical properties that strongly depend on their size, composition, and structures. ZnS has been widely investigated as one of the most important semiconductors, and the control of crystallographic orientation of 1D ZnS nanostructures is still challenging and crucial to exploring their anisotropic properties. Herein, a solution‐processed strategy is developed to synthesize 1D wurtzite (w‐)ZnS nanostructures with the specific and orientations by co‐decomposing the copper dibutyldithiocarbamate {[(C4H9)2NCS2]2Cu, i.e., R2Cu} and zinc dibutyldithiocarbamate (R2Zn) precursors in the mixed solvents of oleylamine and 1‐dodecanethoil. A solution–solid–solid (SSS)‐Oriented growth mechanism is proposed, which includes oriented nucleation dominated and SSS growth dominated stages. The crystallographic orientation mainly depends on the interfacial energy and ligand effect. The 1D w‐ZnS nanostructures with controlled crystallographic orientation display unique morphologies, i.e., ‐oriented w‐ZnS nanorod enclosed with {110} facets while ‐oriented w‐ZnS nanobelt enclosed with wide (002) and narrow (110) facets. The bandgap of 1D w‐ZnS nanostructures can be tuned from 3.94 to 3.82 eV with the crystallographic growth direction varied from to , thus leading to the tunable band‐edge emission from ≈338 to ≈345 nm. 1D w‐ZnS nanostructures with and crystallographic orientations are constructed via proposed SSS‐Oriented growth mechanism. The typical morphology feature and tuned optical properties of oriented ZnS are clarified, i.e., ‐oriented ZnS nanorod enclosed by {110} facets shows band‐edge emission of ≈338 nm while ‐oriented ZnS nanobelt enclosed by wide (002) and narrow (110) facets shows band‐edge emission of ≈345 nm.
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.202303560