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Unit 1

Introduction to nanotechnology, comparison of bulk and nanomaterials – change in band gap and large surface to volume ratio, classification of nanostructured materials. Synthesis of nanomaterials – classification of fabrication methods – top down and bottom up methods.

Concept of quantum confinement and phonon confinement
Basic concepts – excitons, effective mass, free electron theory and its features, band structure of solids. Bulk to nano transition – density of states, potential well – quantum confinement effect – weak and strong confinement regime. Electron confinement in infinitely deep square well, confinement in two and three dimension. Blue shift of band gap – effective mass approximation. Vibrational properties of solids – phonon confinement effect and presence of surface modes.

Unit 2

Tools for characterization:
Structural – X-ray diffraction, transmission electron microscope, scanning tunneling microscope, atomic force microscope. Optical – UV – visible absorption and photoluminescence techniques, Raman spectroscopy.

Nanoscale materials – properties and applications:
Carbon nanostructures – structure, electrical, vibration and mechanical properties. Applications of carbon nanotubes

Unit 3

Field emission and shielding – computers – fuel cells – chemical sensors – catalysis – mechanical reinforcement. Quantum dots and Magnetic nanomaterials – applications.

Nanoelectronics and nanodevices:
Impact of nanotechnology on conventional electronics. Nanoelectromechanical systems (NEMSs) – fabrication (lithography) and applications. Nanodevices – resonant tunneling diode, quantum cascade lasers, single electron transistors – operating principles and applications.

Text Books

  1. Robert W. Kelsall, Ian W. Hamley and Mark Geoghegan, Nanoscale Science and Technology, John Wiley and Sons Ltd 2004.
  2. W. R. Fahrner (Ed.), Nanotechnology and Nanoelectronics, Springer 2006


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