Enrollment No: _______________________	         Exam Seat No:____________________
C.U.SHAH UNIVERSITY
Winter Examination-2015

Subject Name: Nanoscience and Nanotechnology
Subject Code: 4SC05NNE1                                   Branch: B.Sc.(Physics)
			
Semester: 5   Date:11/12/2015      Time: 02.30 To 5.30      Marks: 70
	
Instructions:
(1)	Use of Programmable calculator & any other electronic instrument is prohibited.
(2)	Instructions written on main answer book are strictly to be obeyed.
(3)	Draw neat diagrams and figures (if necessary) at right places.
(4)	Assume suitable data if needed.
		 		 
Q-1		Attempt the following questions:	(14) 	
	a)		Define : Nano structure		
	b)		Give the definition of Nano – Materials .		
	c)		Define: Electron Microscopy		
	d)		What is size effect?		
	e)		State the use of Atomic force microscopy in Nano-Science.		
	f)		Write the use of self assembly process in Nano –Science.		
	g)		What is Nano-CAD?		
	h)		Write the comparison between Top – down and Bottom- up approaches.		
	i)		Write the name of methods by which Carbon Nano tubes are synthesized?		
	j)		 Define: colloidal method.		
	k)		Why is ball-mill used for the high speed milling?		
	l)		Enlist the types of images produced in SEM.		
	m)		How does TEM work?		
	n)		Write any two applications of Nano – Science and Nano-Technology in the space.		

Attempt any four questions from Q-2 to Q-8	
Q-2		Attempt all questions		
	1	Write a note on: Nano-sized materials and structure.	7	
	2	State the challenges in Nano-thechnology. Explain.	7	
Q-3		Attempt all questions		
	1	Explain the chemical as well as magnetic properties of nano-materials.	6	
	2	Write notes on: 1)thermal properties and 2) Electrical properties of nano materials.	8	
Q-4		Attempt all questions		
	1	Explain construction and working of high energy ball-milling with necessary diagram(s).	10	
	2	Write the applications of Nano-science and Nano-technology in the field of medical and bio-technology.	4	
Q-5		Attempt all questions		
	1	Explain  : Sol-Gel method	4	
	2	Explain structure of CNT with necessary diagram.	10	
Q-6		Attempt all questions		
	1	Explain: SEM	7	
	2	Describe Transmission Electron Microscopy	7	
Q-7		Attempt all questions		
	1	Explain CVD technique with neat diagram.	7	
	2	Enlist the applications of Nano-science and Nano-technology in the field of Auto-mobiles. Explain.	7	
Q-8		Attempt all questions		
	1	Explain any three tools to make nano – structures.	6	
	2	Write notes on : 1)Smart materials  and  2)  Sensor	8