Question

Q With reference to quantum dots, consider the following statements:

Which of the statements given above is/are correct?

• A.
  1 and 2 only
• B.
  1 and 3 only
• C.
  2 only
• D.
  1,2 and 3

Answer 1

The correct option is C

2 only

Explanation:

Statement 1 is incorrect: Quantum dots (QDs) are man-made nanoscale crystals. These artificial semiconductor nanoparticles that have found applications in composites, solar cells and fluorescent biological labels.

Statement 2 is correct: When UV light hits these semiconducting nanoparticles, they can emit light of various colours.

Statement 3 is incorrect: The properties of a quantum dot are not only determined by its size but also by its shape, composition, and structure.