Edge Engineering in MoS<sub>2</sub> by Chemically Induced Nano‐Folding

This study introduces a straightforward technique for edge engineering in MoS 2 flakes through chemically induced nano‐folding. By utilizing a buffered oxide etchant solution, precise detachment is achieved from the substrate and controlled folding/rolling of MoS 2 flakes, resulting in the creation of additional active edges up to 100 times thicker than the original flake. The model material, MoS 2 grown on silicon substrates via chemical vapor deposition, undergoes a dramatic transformation in morphology. This transformation is driven by partial detachment from the substrate, followed by bending and folding of the flake boundaries, which generates well‐defined additional edges. The impact of edge thickening is demonstrated on fundamental characteristics such as work function, crystallinity, and catalytic properties. Notably, the findings demonstrate that the engineered edges significantly enhance the electrocatalytic activity of MoS 2 in hydrogen evolution reactions. This highlights the potential of this method to substantially improve the performance of low‐dimensional materials.

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Publication Details

Journal
Small Structures
Published
2025-05-15
DOI
https://doi.org/10.1002/sstr.202500046
Citations
3
Primary Topic
2D Materials and Applications
Type
article
Field-Weighted Citation Impact
1.55

Funders

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Edge Engineering in MoS2 by Chemically Induced Nano‐Folding

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article en
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Abstract

This study introduces a straightforward technique for edge engineering in MoS 2 flakes through chemically induced nano‐folding. By utilizing a buffered oxide etchant solution, precise detachment is achieved from the substrate and controlled folding/rolling of MoS 2 flakes, resulting in the creation of additional active edges up to 100 times thicker than the original flake. The model material, MoS 2 grown on silicon substrates via chemical vapor deposition, undergoes a dramatic transformation in morphology. This transformation is driven by partial detachment from the substrate, followed by bending and folding of the flake boundaries, which generates well‐defined additional edges. The impact of edge thickening is demonstrated on fundamental characteristics such as work function, crystallinity, and catalytic properties. Notably, the findings demonstrate that the engineered edges significantly enhance the electrocatalytic activity of MoS 2 in hydrogen evolution reactions. This highlights the potential of this method to substantially improve the performance of low‐dimensional materials.

Small StructuresVol. 6(9)
University of Parma (IT), Institute of Materials for Electronics and Magnetism (IT), Institute of Nanostructured Materials (IT), Institute of Organic Synthesis and Photoreactivity (IT), University of Milano-Bicocca (IT)
European Commission, Ministry of Environment
Openalex Percentile: Top 18%
2D Materials and Applications
1.55
DOIOpen Access PDFOpenAlex
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