Few-Layer Antimonene by Liquid-Phase Exfoliation.

Area of Science:

• Materials Science
• Nanotechnology
• Condensed Matter Physics

Background:

• Antimonene, a novel 2D material, exhibits unique electronic and optical properties.
• Efficient and scalable production methods for high-quality antimonene are crucial for its technological advancement.

Purpose of the Study:

• To develop a fast, simple, and surfactant-free method for producing stable few-layer antimonene.
• To characterize the quality and stability of the synthesized antimonene nanosheets.

Main Methods:

• Liquid-phase exfoliation of bulk antimony crystals in an isopropanol/water mixture.
• Sonication-assisted exfoliation process.
• Characterization using atomic force microscopy (AFM), scanning transmission electron microscopy (STEM), and electron energy loss spectroscopy (EELS).

Main Results:

• Successfully produced highly stable suspensions of few-layer antimonene nanosheets.
• Confirmed the formation of high-quality antimonene with large lateral dimensions.
• Demonstrated strong thickness-dependent Raman signals, supported by density functional theory (DFT) calculations.

Conclusions:

• The developed method offers a straightforward and efficient route to high-quality, stable few-layer antimonene.
• The synthesized antimonene is suitable for on-surface isolation and integration into devices.
• The thickness-dependent Raman response provides a valuable tool for characterization.