Large-Area Atomically Flat Monocrystalline Gold Flakes: Recent Advances, Applications, and Future Potential

Area of Science:

• Materials Science
• Nanotechnology
• Physical Chemistry

Background:

• High aspect ratio oblate polygonal gold crystals, known as gold flakes, possess unique physical, chemical, and mechanical properties.
• These flakes feature atomically flat surfaces, large areas (µm²), nanometric thickness, and monocrystalline structure.
• Since their initial discovery, significant advancements have been made in their synthesis and large-scale production.

Purpose of the Study:

• To review the synthesis, properties, and applications of large-area gold flakes.
• To highlight key developments from early discoveries to recent breakthroughs.
• To discuss the integration of gold flakes in various technological fields.

Main Methods:

• Comprehensive literature review of gold flake research.
• Analysis of synthesis approaches and fabrication techniques.
• Exploration of applications in photonics, sensing, nanoelectronics, and biomedicine.

Main Results:

• Gold flakes exhibit exceptional properties due to their unique morphology.
• Advances in synthesis enable large-scale production and diverse applications.
• Gold flakes are successfully integrated as functional building blocks in advanced technologies.

Conclusions:

• Gold flakes are versatile materials with significant potential.
• Ongoing research addresses challenges and explores new applications.
• Future developments promise further innovation in nanotechnology and materials science.