Question

Which instrument is used for determination of particle size?

• A. SEM
• B. TEM
• C. FTIR
• D. UV visible spectroscopy

Hint:

SEM = Surface morphology and size; TEM = Internal structure and size.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
This is a factual question about characterization techniques used in nanotechnology and materials science.

Step 3: Detailed Explanation:
- SEM (Scanning Electron Microscopy) is used to observe surface morphology and determine the size and shape of particles at the nanoscale.
- TEM (Transmission Electron Microscopy) is used for high-resolution imaging of internal structures and very small particles, but SEM is the most common tool for general size determination.
- FTIR (Fourier Transform Infrared) spectroscopy is used to identify chemical bonds/functional groups.
- UV-Vis spectroscopy is used for quantitative analysis of light-absorbing substances.

Step 4: Final Answer:
SEM is primarily used for the determination of particle size.