Question

Match the LIST-I with LIST-II 

LIST-I	LIST-II
A. Field emission	I. detector of gases
B. Chemical sensor	II. strength of plastic composites
C. Mechanical Reinforcement	III. serve as heat sink
D. Computer	IV. flat panel display

Choose the correct answer from the options given below:

• A. A - I, B - II, C - III, D - IV
• B. A - II, B - III, C - IV, D - I
• C. A - IV, B - III, C - II, D - I
• D. A - IV, B - I, C - II, D - III

Hint:

Associate key properties of carbon nanotubes with their applications:

High aspect ratio (long and thin) \(\rightarrow\) Field Emission (Displays)
High surface area \(\rightarrow\) Chemical Sensing
High strength \(\rightarrow\) Composites
High thermal conductivity \(\rightarrow\) Heat Sinks

Answer 1

The Correct Option is D

Step 1: Concept Overview:
The question involves matching nanomaterial applications (likely carbon nanotubes) with their descriptions or uses.
Step 2: Detailed Explanation:


A. Field emission: Carbon nanotubes, with their high aspect ratio and sharp tips, are excellent field emitters, emitting electrons under low electric fields. This is used in flat panel displays. Therefore, A corresponds to IV.
B. Chemical sensor: Nanomaterials' high surface-area-to-volume ratio makes their electrical properties sensitive to molecular adsorption, useful for gas detectors. Thus, B corresponds to I.
C. Mechanical Reinforcement: Carbon nanotubes' high tensile strength and stiffness increase the strength of plastic composites when embedded in a polymer matrix. Therefore, C corresponds to II.
D. Computer: A major challenge in computers is heat dissipation. High thermal conductivity nanomaterials, like carbon nanotubes, can be used as thermal interface materials or heat spreaders, serving as a heat sink. Therefore, D corresponds to III.

Step 3: Solution:
The correct matches are A-IV, B-I, C-II, D-III.