CY3151 ENGINEERING CHEMISTRY
Unit – II Nanochemistry
1. What are nonoparticles?
Nanoparticles are the particles, the size of which ranges from 1-100 nm.
2. What are nano-materials?
Nanomaterials are the materials having components with size less than 100 nm at least in one
dimension.
3. What is nano-chemistry?
Nano-chemistry is the branch of nano-science, which deals with the chemical applications of
nanomaterials. It also includes the study of synthesis and characterisation of nanomaterials.
4. Distinguish between bulk particles and nano-particles.
Nano-particles
1. Size is less than 100 nm Bulk particles Size is larger in micron size
2. Collection of few Collection of thousands of molecules molecules.
3. Surface area is more Surface area is less
4. Strength, hardness are Strength, hardness are less more
5. Name some important physical methods of synthesising nano-materials.
1. Laser ablation
2. Chemical Vapour Deposition (CVD)
3. Electro-deposition
6. What is CVD?
CVD is Chemical Vapour Deposition. It is a process of chemically reacting a volatile compound
of a material with other gases, to produce a non-volatile solid that deposits automatically on a
suitably placed substrate.
7. What is the basic principle involved in solvothermal synthesis of nano-materials.
Solvothermal synthesis involves the use of solvent under high temperature (between 100°C to
1000°C) and moderate to high pressure (1atm to 10,000atm) that facilitate the interaction of
CITAR CHENNAI INSTITUTE OF TECHNOLOGY AND APPLIED RESEARCH 1
Unit – II Nanochemistry
1. What are nonoparticles?
Nanoparticles are the particles, the size of which ranges from 1-100 nm.
2. What are nano-materials?
Nanomaterials are the materials having components with size less than 100 nm at least in one
dimension.
3. What is nano-chemistry?
Nano-chemistry is the branch of nano-science, which deals with the chemical applications of
nanomaterials. It also includes the study of synthesis and characterisation of nanomaterials.
4. Distinguish between bulk particles and nano-particles.
Nano-particles
1. Size is less than 100 nm Bulk particles Size is larger in micron size
2. Collection of few Collection of thousands of molecules molecules.
3. Surface area is more Surface area is less
4. Strength, hardness are Strength, hardness are less more
5. Name some important physical methods of synthesising nano-materials.
1. Laser ablation
2. Chemical Vapour Deposition (CVD)
3. Electro-deposition
6. What is CVD?
CVD is Chemical Vapour Deposition. It is a process of chemically reacting a volatile compound
of a material with other gases, to produce a non-volatile solid that deposits automatically on a
suitably placed substrate.
7. What is the basic principle involved in solvothermal synthesis of nano-materials.
Solvothermal synthesis involves the use of solvent under high temperature (between 100°C to
1000°C) and moderate to high pressure (1atm to 10,000atm) that facilitate the interaction of
CITAR CHENNAI INSTITUTE OF TECHNOLOGY AND APPLIED RESEARCH 1
