Quantum dots are tiny, colloidal semiconductor particles, typically only a few nanometers in size—so small that they exhibit quantum mechanical properties. Because of their minute size, quantum dots have discrete energy levels, which gives them unique optical and electronic characteristics, such as size-tunable light emission.
When quantum dots are excited by light or electricity, they emit light at specific wavelengths depending on their size and material composition. Smaller dots emit bluer (shorter wavelength) light, while larger ones emit redder (longer wavelength) light. This tunability makes them highly versatile.
Applications of Quantum Dots:
Display Technologies: Used in QLED TVs and screens for vibrant, energy-efficient colors with high brightness and contrast.
Biomedical Imaging: Serve as fluorescent labels for imaging cells, tissues, and even tumors, offering brighter and more stable signals than traditional dyes.
Photovoltaics: Incorporated into solar cells to improve light absorption and conversion efficiency.
Quantum computing and Information Technology: Their quantum properties make them suitable for use in quantum bits (qubits) and other quantum information processing devices.
Photodetectors and Sensors: Quantum dots are used in sensitive detectors for light, chemicals, and biological molecules.
Lighting: Employed in LED lighting to produce specific colors with high purity.
Brookhaven Instruments’ light scattering instruments are being used widely to characterize quantum dots. Both our BI-200SM research-grade dynamic and static light scattering goniometer and our NanoBrook series of dynamic light scattering instruments have been documented to be highly useful in the development of novel applications for quantum dots.
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See also:
1) Surface-Tunable Photoluminescence from Block Copolymer-Stabilized Cadmium Sulfide Quantum Dots
Brookhaven Instruments, with a legacy of pioneering in light scattering and zeta potential analysis, is committed to advancing its technology to provide reliable and innovative solutions that support modern scientific breakthroughs in nanotechnology, pharmaceuticals, and materials science.