Gold Nanoparticles
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• In nanotechnology centimeters and even millimeters are too small for measuring so scientists use a unit called a nanometer which is one billionth (1,000,000,000) of a meter
• Scientists and engineers want to study nanotechnology
  because materials behave differently at a very small scale and working at this scale allows them to make new materials and devices which could improve our lives.
• Nano-scale materials have very different properties than
  at a larger scale – for example, nano-particles of gold
  actually appear red
• Different sizes of nano gold produce different colors of glass
• Gold nanoparticles are being investigated as carriers for drugs such as Paclitaxel
• Colloidal gold is also extremely useful in the medical field
• Gold nanoparticles have bioapplications in four areas: labelling, delivery, heating, and sensing.
• Gold nanoparticles are used in a wide range of cosmetic and beauty care applications
• The global market for these nanoparticles in biomedical, pharmaceutical and cosmetic applications is worth about $500 million

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