Gold nanomaterials for optical biosensing and bioimaging

Area of Science:

• Nanotechnology and Materials Science
• Biomedical Engineering
• Optical Physics

Background:

• Gold nanoparticles (AuNPs) possess unique optical properties crucial for biomedical applications.
• These properties can significantly enhance sensitivity, specificity, speed, contrast, resolution, and penetration depth in biosensing and bioimaging.
• Different gold nanostructures offer versatile optical characteristics for tailored applications.

Purpose of the Study:

• To review recent advancements in optical biosensing and bioimaging techniques utilizing AuNPs.
• To summarize fabrication methods and optical properties of various AuNPs.
• To highlight emerging applications and discuss future trends and challenges in AuNP-based diagnostics.

Main Methods:

• Review of scientific literature focusing on AuNP-based optical biosensing and bioimaging.
• Analysis of techniques based on surface plasmon resonance (SPR), surface-enhanced Raman scattering (SERS), and luminescence.
• Summarization of fabrication strategies and characterization of AuNP optical properties.

Main Results:

• AuNPs, through SPR, SERS, and luminescence, enable significant improvements in biosensing and bioimaging performance.
• Diverse AuNP types and fabrication methods are presented, showcasing their adaptability.
• Emerging applications demonstrate the potential of AuNPs in novel diagnostic tools.

Conclusions:

• AuNPs are pivotal nanomaterials for advancing optical biosensing and bioimaging.
• Continued research into AuNP fabrication and optical properties will drive innovation in medical diagnostics.
• Addressing challenges in preclinical and clinical implementation is key for widespread adoption of AuNP-based technologies.