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Characteristic Features of Nanoparticles

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Estimated time: 2 minutes
Maharashtra State Board: Class 12

Key Points: Characteristic Features of Nanoparticles

  • Colour property: Nanoparticles show different colours at the nanoscale due to size changes (e.g., gold appears red instead of yellow).
  • High surface area: Nanoparticles have a high surface area-to-volume ratio, leading to higher chemical reactivity.
  • Catalytic activity: Due to large surface area, nanoparticles act as efficient catalysts and can be easily recycled.
  • Thermal properties: Melting point changes at the nanoscale and generally decreases with smaller size.
  • Mechanical properties: Nanoparticles show greater strength and hardness compared to bulk materials.
  • Electrical conductivity: Electrical properties change at the nanoscale; materials can behave as conductors or semiconductors.
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