Multifunctional Quantum Dots: A Review of Emerging Roles in Technology and Sustainability

Area of Science:

• Nanomaterials Science
• Applied Physics
• Materials Chemistry

Background:

• Quantum dots (QDs) are semiconductor nanocrystals with size-tunable optoelectronic properties.
• Traditional applications of QDs are being surpassed by emerging advanced uses.
• Their unique characteristics enable integration into diverse technological fields.

Purpose of the Study:

• To explore advanced applications of quantum dots (QDs) beyond conventional uses.
• To highlight the role of QDs in modern electronics, healthcare, energy, food safety, and smart materials.
• To emphasize how QD properties drive innovation in various sectors.

Main Methods:

• Extensive literature survey of recent research articles, reviews, and technological reports.
• Systematic analysis of optical, electronic, nonlinear, and thermoelectric properties of QDs.
• Focus on understanding how size-dependent properties enable diverse applications.

Main Results:

• QDs enhance photodetector sensitivity and QLED display efficiency and color purity.
• QD-based sensors improve food safety by detecting pathogens and pesticides.
• QDs enable transparent solar devices and non-invasive wearable healthcare monitoring.
• Nonlinear optical and thermoelectric properties of QDs advance laser technology and energy harvesting.

Conclusions:

• Quantum dots possess versatile, multifunctional properties driving innovation across multiple sectors.
• Their unique physicochemical attributes position them as key components for next-generation devices.
• Continued research will expand the practical implementation of QDs in sustainable technologies.