Jaypee Institute of Information Technology (JIIT) 2008 B.E Test 3 : Nanoscience

JAYPEE UNIVERSITY OF INFORMATION TECHNOLOGY, WAKNAGHAT

TEST III (November 2008)

B.TECII VII SEMESTER (ALL BRANCHES)

COURSE CODE: 07B71PH401    MAX. MARKS: 30

COURSE NAME: NANO SCIENCE AND TECHNOLOGY

COURSE CREDITS: 3    MAX. TIME: 1 HR. 30 MIN.

Ql. What are the various techniques for the fabrication of one dimensional nano structures? Describe in detail the crystal growth technique for the synthesis of anisotropic nano materials.    (6)

Q2. Based on the number of Broken Periodic Bond Chains on a given facet, explain the KVS theory of irreversible incorporation of atoms on the surface.    (5)

Q3. Define surface energv. Show that the low index facets have low surfacc energy.

JAYPEE UNIVERSITY OF INFORMATION TECHNOLOGY, WAKNAGHAT

(4)

Q4. Sol-Gel Processing is most generally used for the synthesis of oxide Semiconductors. Elaborate this technique with the help of chemical reactions. (5)

Q5. Write short notes on the following:

ELECTROSPINNING

LITHOGRAPHY    (6)

Q6. Fill in the Blanks:

1.    The densification in nano materials occurs very well at............temperature than

that of the conventional materials.

2.    Nanoparticles have a very high.................to........................ratio.

3.    At the critical size r - r* dJG/Jr * --------....    (4)

Attachment: jaypee-institute-of-information-technology--jiit--2008-b-e-21237-1.jpg

Earning:   Approval pending.