Localised strain and doping of 2D materials.

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Two-dimensional (2D) materials offer potential replacements for silicon in microelectronics and metal oxides in sensors.
• The performance of 2D materials is significantly influenced by environmental factors like doping and strain.
• Understanding interfacial interactions, structural disorder, and strain is critical for adopting 2D materials in industrial applications.

Purpose of the Study:

• To provide a comprehensive overview of strain's effect on 2D material properties.
• To elucidate the relationship between strain-induced lattice deformation and physical/electronic characteristics.
• To highlight the importance of strain engineering for 2D materials in emerging technologies.

Main Methods:

• Utilizing scanning probe techniques and Raman spectroscopy to analyze strain and doping in 2D materials.
• Employing Raman shifts for non-destructive characterization of strain and doping effects.
• Developing a generalized model to understand the interplay between strain and doping in graphene and MoS2.

Main Results:

• Strain and doping significantly modulate the intrinsic properties of 2D materials.
• Raman spectroscopy provides accurate, non-destructive measurement of strain and doping.
• A generalized model effectively deconvolutes the coupled effects of strain and doping in 2D materials.

Conclusions:

• Strain engineering offers a pathway to tune the properties of 2D materials for advanced applications.
• The study provides insights into controlling strain and doping for reliable 2D material-based devices.
• The findings are applicable to a broader range of 2D materials beyond graphene and MoS2, paving the way for straintronics.