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Nanowires
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Arash Badie Modiri
April 18, 2015
Science
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Nanowires
Arash Badie Modiri
April 18, 2015
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Transcript
Nanowires Arash Badie Modiri Shahid Beheshti University Apr 19, 2015
1
Outlines • Physical Properties • Applications • Synthesis 2
Size Diameter ∝ 10−8 meters Length/Width > 103 3
“Quantum Wires” Electrons are laterally confined thus they occupy different
states. 4
Types • Superconducting • Metallic • Semiconducting • Insulating •
Molecular nanowires (DNA) 5
Nanoelectronics Doped nanowires p-n junction Nanowire logical gates “Multifunctional Devices
and Logic Gates With Undoped Silicon Nanowires”. Mongillo, Massimo et. al. (2012) 6
Moore’s law 3D microelectronics “Cramming more components onto integrated circuits”.
Moore, Gordon E. (1965). “Nanowire Lithography on Silicon”. Colli, Alan et. al. (2008). 7
Happy 50th Birthday Moore’s Law :) 8
Synthesis 9
Bottom-up: VLS “Growth of silicon nanowires via gold/silane vapor–liquid– solid
reaction”. Westwater et. al. (2012) 10
Bottom-up: VLS Gold (Au) particle catalyzed CVD growth of Si
nanowires 11
Bottom-up: Solution Phase Synthesis Grow nanowires in solutions Many types
of materials 12
Lithography Optical Electron beam 13
“Fabrication of metallic nanowires with a scanning tunneling microscope”. Kramer
et. al. (1995) Lithography: Scanning Tunneling Microscope 14
Top-down: Suspension Indenting the tip of a STM in the
surface of a metal near its melting point, and then retracting it. 15
Future Microelectronics Nanosensors 16
Thanks! File will be available on dropbox and speakerdeck: https://speakerdeck.com/arashbm
17