International Gold Nanoparticles Definition
Gold nanoparticles (AuNPs) are small particles of gold with a diameter of less than 100 nanometers (nm). They are typically spherical in shape and have a reddish-purple color. AuNPs have a unique set of properties that make them useful in a variety of applications, including electronics, optics, and medicine.
The international definition of gold nanoparticles was developed by the International Organization for Standardization (ISO). ISO defines AuNPs as “spherical particles of gold with a diameter of less than 100 nm.” This definition is based on the fact that the properties of AuNPs change significantly as their size increases. For example, smaller AuNPs are more soluble in water and have a higher surface area to volume ratio than larger AuNPs.
The ISO definition of AuNPs is widely accepted by the scientific community. However, there is some debate about the exact size limit for AuNPs. Some researchers believe that the size limit should be 50 nm, while others believe that it should be 100 nm. The ISO definition is a compromise between these two viewpoints.
The definition of AuNPs is important because it allows researchers to compare their results with each other. It also helps to ensure that AuNPs are used safely and effectively in a variety of applications.
Properties of Gold Nanoparticles
The unique properties of gold nanoparticles are a result of their small size and high surface area to volume ratio. These properties make AuNPs ideal for a variety of applications, including:
* Electronics: AuNPs can be used as conductors, semiconductors, and insulators. They are also used in the manufacture of transistors, solar cells, and fuel cells.
* Optics: AuNPs can be used to create a variety of optical effects, including surface plasmon resonance and fluorescence. They are used in the manufacture of lasers, sensors, and displays.
* Medicine: AuNPs can be used to deliver drugs, target cancer cells, and image biological tissues. They are also used in the development of new medical treatments for a variety of diseases.
Applications of Gold Nanoparticles
The unique properties of gold nanoparticles make them useful in a wide variety of applications. Some of the most common applications include:
* Electronics: AuNPs are used in the manufacture of transistors, solar cells, and fuel cells. They are also used as conductors, semiconductors, and insulators.
* Optics: AuNPs are used in the manufacture of lasers, sensors, and displays. They are also used to create a variety of optical effects, including surface plasmon resonance and fluorescence.
* Medicine: AuNPs are used to deliver drugs, target cancer cells, and image biological tissues. They are also used in the development of new medical treatments for a variety of diseases.
Conclusion
Gold nanoparticles are a versatile material with a wide range of applications. Their unique properties make them ideal for use in electronics, optics, and medicine. The international definition of gold nanoparticles helps to ensure that researchers can compare their results with each other and that AuNPs are used safely and effectively.
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