With reference to carbon nanotubes, consider the following statements:
(1) They can be used as carriers of drugs and antigens in the human body.
(2) They can be made into artificial blood capillaries for an injured part of human body.
(3) They can be used in biochemical sensors.
(4) Carbon nanotubes are biodegradable.
Which of the statements given above are correct?
Answer:
(c)
Non-traditional
Carbon nanotubes (CNTs) are allotropes of carbon, made of graphite and constructed in cylindrical tubes with nanometer in diameter and several millimeters in length. Their impressive structural, mechanical, and electronic properties are due to their small size and mass, their strong mechanical potency, and their high electrical and thermal conductivity. Hence, statements 1 and 3 are true. Multiple types of microbes including bacteria and fungi have the ability to degrade carbon nanotubes (CNTs), graphene (GRA), and their derivatives and in the future more species with this ability will be found. Hence, CNTs are biodegradable. Therefore, statement 4 is true. Therefore, the correct answer is (d).