nanotechnology

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DEPARTMENT OF MECHANICAL ENGINEERING

NANOTECHNOLOGY

UNIT-I

One Mark Questions

1.

Define Nanometer?

2.

Define Nano Science and

3.

Define Nano Technology?

4.

Who predicted the scope of nano materials in 1959?

5.

Who used the term "nanotechnology" to describe materials whose dimensions are less than a micrometer?

6.

Drexler's vision of nanotechnology is often called ..........................

7.

Nanomaterial means?

8.

Are there nano objects in your body? Name two with sizes

9.

Water molecule size less than one nanometer? True or False.

10.

Write Famous quote of Nobel laurate Richard Feynman?

11.

Write the title of the first book on nano technology?

12.

Tool used to find out nanoobjects?

13.

Which nanomaterial is suitable to make High power magnets?

14.

Write any two nanocrystalline materials to make tougher and harder materials?

15.

Size of hydrogen atom in nano meter?

16.

AFM means?

17.

MRI means?

18.

Write any one Nanocrystalline material used in HDTV?

19.

Identify the nano material used in KE penetrators?

20.

Define Aero gel?

21.

Aerogels are composed of .................................. with air (or any other fluid, such as a gas) trapped at their interstices.

22.

Write any one method used to produce nanomaterial?

23.

Name any two nano crystalline materials used in Tougher and Harder Cutting Tools

24.

NGEV means?

25.

High Energy Density Batteries are made by ....................?

26.

Application of nanocrystalline Zirconia is?

27.

Nanocrsytalline ................................... are potential candidates for enhancing these ignitors.

28.

Nanocrystalline silicon carbide (SiC) is a candidate material for........................

29.

Nanocrystalline ............................. are used in very large electrochromic display devices.

30.

Greater Fuel Efficiency in automobiles is achieved by coating the engine cylinders (liners) with nanocrystalline ........................................

UNIT-II

1.

What is Nano Material?

2.

Write any two properties of nano material?

3.

Define Bottom up approach?

4.

Define Top down approach?

5.

What is hybrid approach?

6.

Write any two properties of Nano material?

7.

Name any two nano crystalline materilas made by ball mill method?

8.

What is IGC?

9.

Which intergas is used in INERT GAS CONDENSATION?

UNIT-I

TEN MARK QUESTIONS

1.

What are nano, nanoscience and nanotechnology? What are the important aspects and future implications of nanotechnology?

2.

Describe the origin of nanotechnology.

3.

Write a note on: a) Nanosize effect and b) surface area to volume ratio.

4.

What are the advantages and challenges in nanotechnology?

5.

What are nanomaterials? Explain the classification of nanomaterials and special nanomaterials.

6.

Describe the history of nanomaterials.

7.

Explain the applications of nanomaterials in electronics and medical field with examples.

8.

Explain the applications of nanomaterials for energy and in automobiles with examples.

9.

Explain the applications of nanomaterials in textiles, sports & toys, domestic and cosmetics with examples.

10.

Explain the applications of nanomaterials in space, defence and transportation.

UNIT-II

TEN MARK QUESTIONS

1.

Explain bottom-up and top down approaches for fabricating of nanostructures with examples. What are the advantages and disadvantages of both methods?

2.

What is ball mill? Explain common ball miller and planetary ball miller with neat figures.

3.

Explain with neat schematic lay out: a) inert gas condensation, b) arc discharge method

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