http://www.phys.sinica.edu.tw/TIGP-
NANO/Course/2015_Spring/2015_Spring_AdvancedNanotechnology_A.html


Advanced Nanotechnology (A)

Credits: 3

Lecturers: Pau, Chun-Wei (RCAS) and Chen, Chii-Dong (IoP)

Classroom: P101 Meeting Room, IoP

Class hour: Wednesday, 09:10-12:00

Course overview:

This course will be focused in two parts; in the first part, we will focus on
the formation and evolution of nanostructures. In the second part, the focus
will be laid on electron transport in low dimensional systems.

This course will cover the following topics:

PART I: Formation and Evolution of Nanostructures

Review of thermodynamics and phase diagrams

Capilliary effects on nanocrystals:
Surface/interface energies, size effects on nanocrystal phase stabilities, Wulff
plot, nanocrystal shape.

Nucleation and growth of nanomaterials:
Homo- vs. heterogeneous nucleation, nucleation in solids, growth mechanisms of
CVD graphene, VLS growth of nanowire.

Diffusion:
Driving force of diffusion, Einstein’s relation, atomistic/statistical picture
of diffusion, fast diffusion paths in materials.

Diffusion driven by external fields and surface/interface curvature:
Diffusional creep, grain boundary grooving, Raleigh instability (nanofiber-
nanosphere transition), Asaro-Tiller instability (quantum dot formation), Li ion
diffusion in nanocrystalline anode/cathode materials.

Phase separation:
Spinodal decomposition, Ostwald ripening, and self-assembled nanostructures

Mechanical properties of nanomaterials (1 week):
Mechanical properties of nanocrystalline materials and thin films, mechanical
properties of graphene and nanotubes



PART II: Electron transport in low dimensional systems

Introduction
Quantum vs. classical transport, electron scattering, screening length,
diffusive conduction, hopping conduction, Anderson localization, Ballistic
transport


Electronic states in 1D, 2D crystals
Wave function in 1D wires, rings, and chains, Brillouin zone in 1D crystals,
Peierls’ distortion, Brillouin zone in 2D crystals, Graphene, Dirac point, from
graphene to carbon nanotube (CNT), metallic vs. semiconductor CNTs

Mesoscopic phenomena
Fermi wavelength, mean free path, magnetic length, phase breaking length,
quantum interference, weak localization, Aharonov-Bohm effect, conductance
quantization, Landauer-Butticker formalism, 2D electron gas

Tunneling and Single electron transistors (SETs)
From FET to SET, quantum tunneling, charging effect, higher order tunneling,
Spin-dependent tunneling, Cooper pair tunneling in superconducting SET, effect
of EM environment

Quantum dot devices
Quantized energy levels, coupling to electron reservoirs, level broadening,
Thouless criterion, conductance quantization (revisit), coupled quantum dots,
superposition states, quantum bits

Device Fabrication
Photolithography, Moore’s law, state-of-the-art technology in semiconductor fabs
and issues, e-beam lithography for research laboratories

Measurement techniques, Applications of nano electronic devices
Low-level electrical measurement techniques, nanowire FET, charge sensor,
molecular sensor, graphene optoelectronics, emerging 2D materials



Reference

D.A. Porter and K.E. Easterling “Phase Transformations in Metals and Alloys”
Robert T. DeHoff “Thermodynamics in Materials Science”
Quantum Transport: Atom to Transistor by Supriyo Datta (2005)
Electronic Transport in Mesoscopic Systems by Supriyo Datta
(Cambridge Studies in Semiconductor Physics and Microelectronic Engineering)
Charles Kittel: Solid State Physics, 8th edition
Ch. 18, pp 519~561 by Paul McEuen, Cornell University
Quantum Transport in Semiconductor Nanostructures, Solid State Physics, 44, 1-
228 (1991), C. W. J. Beenakker and H. van Houten
Single Charge Tunneling: Coulomb Blockade Phenomena in Nanostructures
Editors: Hermann Grabert and Michel H. Devoret, Plenum Press, NATO ASI 1991