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Which technique is commonly used for the fabrication of nanoparticles?a) Sedimentationb) Filtrationc) Distillationd) Lithography

Question

Which technique is commonly used for the fabrication of nanoparticles?

a) Sedimentation
b) Filtration
c) Distillation
d) Lithography

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Solution

The technique commonly used for the fabrication of nanoparticles is d) Lithography.

Here's a step-by-step explanation:

  1. Lithography is a top-down fabrication technique where a bulk material is reduced in size to the nanoscale.

  2. This process begins with the application of a resist (a type of photosensitive material) onto the material that is to be patterned.

  3. Then, the resist is exposed to a specific type of light (such as ultraviolet light) through a mask that contains the desired pattern.

  4. The exposed areas of the resist become soluble, so when the material is immersed in a developer solution, the patterned resist is washed away, leaving the underlying material exposed.

  5. The exposed material can then be etched away or added to, allowing for the creation of nanostructures.

  6. Finally, the remaining resist is removed, leaving behind the desired nanoparticle structure.

This method is widely used in the semiconductor industry and in nanotechnology to create very small structures. Other methods like Sedimentation, Filtration, and Distillation are not typically used for the fabrication of nanoparticles.

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