Application of two-dimensional layered materials in surface-enhanced Raman spectroscopy (SERS)

Area of Science:

• Materials Science
• Spectroscopy
• Nanotechnology

Background:

• Two-dimensional (2D) layered materials offer cost-effective and non-toxic alternatives for Surface-Enhanced Raman Spectroscopy (SERS) substrates.
• Current 2D materials exhibit lower enhancement factors and detection limits compared to traditional precious metal substrates.

Purpose of the Study:

• To explore advanced strategies for improving the SERS performance of 2D layered materials.
• To provide a comprehensive overview of enhancement mechanisms, synthesis, and applications of 2D materials in SERS.

Main Methods:

• Highlighting seven key strategies: layer-dependent control, defect engineering, laser regulation, electric field modulation, phase engineering, arrangement optimization, and heterostructure design.
• Detailed discussion on molybdenum disulfide (MoS2) and MXenes as exemplary SERS substrates.
• Analysis of enhancement mechanisms, synthesis routes, and current applications.

Main Results:

• Seven distinct strategies are presented to significantly enhance the SERS capabilities of 2D materials.
• Molybdenum disulfide (MoS2) and MXenes demonstrate potential as effective SERS substrates with optimized properties.
• The study elucidates the underlying enhancement mechanisms and practical synthesis approaches.

Conclusions:

• Advanced strategies can overcome the limitations of 2D layered materials in SERS applications.
• Future research should focus on further optimizing 2D materials for superior SERS performance.
• Addressing challenges in synthesis and application will be crucial for widespread adoption.