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BETCK105C/205C

Visvesvaraya Technological University, Belagavi.

Model Question Paper-I with effect from 2022-23(CBCS Scheme) First/Second Semester B.E. Degree Examination

USN:

Introduction to Nanotechnology

Note:Answer any FIVE full questions, choosing at least ONE question from each Module.

QNo.	Module– 1		Marks
Q1	a	Describe the Sputtering technique for the preparation of nanomaterials. Mention itsadvantages and drawbacks.	8
	b	Write a note on a) surface to volume ratio b) precipitation for the synthesis of nanomaterials.	8
	c	Define the terms i) Nanomaterials ii) Quantum confinement	4
OR
Q2	a	Explain how optical, electrical and catalytical properties vary from bulk to nanomaterials.	8
	b	Explain the steps involved in synthesis of silica nanoparticles by taking sol gel method.	8
	c	Explain the electronconfinement in OD, 1D, 2D, 3D systems with examples.	4
Module– 2
Q3	a	Explain the basic principle, working and instrumentation of scanning electron microscope with diagram.	8
	b	Explain the basic principle, working and instrumentation of Scanning Tunnelling Microscope (STM).	8
	c	Explain the basic principles of working of X-ray diffraction	4
OR
Q4	a	Explain the contact, no-contact and tapping imaging modes of the AtomicForce Microscope (AFM).Mention any four differences between STM & AFM.	8
	b	Explain the working and instrumentation of the IR spectroscopy. Mention its application in the determination of functional group.	8
	c	In a X-raydiffraction experiment peak width half maxima (FWHM) is 0.6 o and its bragangle (θ) is 24o. Calculate the crystallite size using Scherrer equation. Givenwavelength used in X-ray diffraction experiment is 1.54 Å. Given, k =0.94	4
Module– 3
	a	Explain the synthesis of graphene by chemical vapor deposition. Mention	8

Q5		electrical, electronic & mechanical properties of graphene.
	b	Explain the electronicand mechanical properties of singlewalled carbon nanotubes (SWCNT’s)& multi walled carbon nanotubes (MWCNT’s).	8
	c	Explain the Synthesis of SWCNT & MWCNT by chemical vapor deposition.	4
OR
Q6	a	Write a note on a) carbon nanocomposites b) nanodiamonds	8
	b	Explain the Synthesis, electrical, mechanical properties of fullerenes. Mention its applications.	8
	c	Write a note on carbon nanofibers.	4
Module-4
Q7	a	Define Solar cells. Describe briefly 1st, 2nd& 3rdgenerations of Solar cells.	8
	b	Explain the construction and working of Fuel cells.	8
	c	Mention the limitations ofgraphite anodes.	4
OR
Q8	a	Describe the construction and working of Dye-sensitized solar cells solar cells.	8
	b	Describe the construction and working of Lithium-ion battery	8
	c	Explain the requirements of anode, cathode materials for the Lithium-ion battery.	4
Module-5
Q9	a	Explain the application of nanotechnology indiagnosis&drug delivery.	8
	b	Define nanophotonic. Explain optical applications of the nanotechnology.	8
	c	Write a note on nano fertilizers.	4

Q10	a	Explain the nanotechnology application in contact lenses, detector for Heart Attacks, tiny 3-D Printed Batteries, creating Biodegradable Electrodes.	8
	b	Explain the application of nanotechnology in agricultural and food field.	8
	c	Define the following terms: a. Nanobiotechnology b. Nanocomputing c. Nanoelectronics c. Nano chemistry	4

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