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15-398 Introduction to Nanotechnology
Examining the nanoscale
Microscopy & Manipulation
SEM TEM STM AFM
Manipulating atoms
Seth Copen Goldstein
[email protected]
STM AFM
CMU lecture 5 15-398
© 2004 Seth Copen Goldstein
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A Bit of Microscopy History Optical Microscope ~1700
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Transmission Microscopy Light:
SEM: 1942
Electrons: TEM 1931
© 2004 Seth Copen Goldstein
Max resolution 275nm
1981: STM 1986: AFM
Electrons Max resolution different views
Made from Si or Si3N4
freeze fractured styrene-isobutylene-styrene a-b-a block copolymer film, from: http://www.psrc.usm.edu/mauritz/afm.html lecture 5 15-398
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Interpretting images
Carbon nanotubes lecture 5 15-398
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More artifacts
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Subatomic resolution
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AFM Images
Dip-Pen Lithography Can Read and Write!
NaCl on Mica (5.6nmx4.8nm) Hard Disk
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Inks Soft Materials
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Speeding up the process
Hard Materials
Small functional molecules SAMs Conducting polymers Biopolymers / macromolecules
Metal inks Sol precursor inorganic inks Nanoparticle catalysts
From Nanoinc presentation lecture 5 15-398
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Today Looking at (and modifying) the nanoscale SEM/TEM STM/AFM For Thursday: read chapter 3.
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