Why in the News?
Researchers from Centre for Nano and Soft Matter Sciences (CeNS) and Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) have developed a temperature controlled organic nanomaterial using Naphthalene Diimide (NDI).
What is Naphthalene Diimide (NDI)?
- Naphthalene Diimide (NDI) is an amphiphilic organic molecule
- Has:
- Water attracting part (hydrophilic)
- Water repelling part (hydrophobic)
- Enables self assembly into nanostructures
How It Works
At Room Temperature
- NDI molecules form nanodisks
- High electrical conductivity
- Interact with polarized light
When Heated
- Nanodisks transform into 2D nanosheets
- Electrical conductivity drops 7 times
- Optical properties change
- This allows temperature controlled switching of material properties.
| [2022] Consider the following statements: 1 Other than those made by humans, nanoparticles do not exist in nature. 2 Nanoparticles of some metallic oxides are used in the manufacture of some cosmetics. 3 Nanoparticles of some commercial products which enter the environment are unsafe for humans. Which of the statements given above is/are correct? (a) 1 only (b) 3 only (c) 1 and 2 (d) 2 and 3 |
