FEYMANFEYMAN FEYMANFEYMAN FEYMANFEYMAN FEYMANFEYMAN FEYMANFEYMAN FEYMANFEYMAN FEYMANFEYMAN FEYMANFEYMAN FEYMANFEYMAN FEYMANFEYMAN FEYMANFEYMAN FEYMANFEYMAN

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Make It Small !
Make It Small !
Make It Small !
Make It Small !
Make It Small !
Make It Small !
Make It Small !
Make It Small !
Make It Small !
Make It Small !
Make It Small !
Make It Small !

• FEYMANFEYMAN FEYMANFEYMAN FEYMANFEYMAN
  FEYMANFEYMAN FEYMANFEYMAN FEYMANFEYMAN
  FEYMANFEYMAN FEYMANFEYMAN FEYMANFEYMAN
  FEYMANFEYMAN FEYMANFEYMAN FEYMANFEYMAN

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There is plenty of room down the bottom (1959)
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?? ? ??
????(2000 BC) cm ?? ????(1750)
mm ?? ?????(1960) µm CMOS 21??
nm ??
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• NANO

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Enabling Techniques

• Supramolecular Chemistry

• Nanoprobes (STM/AFM)

• Electron Microscopy(TEM/SEM)

• Nanolithography

• Micromachining

• Molecular Design/Modeling

• Thin Film Technology

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Milstones in Nanoscience
4000 BC Democritus Atom 1905
Einstein Theory of Brownian Motion Sugar
Molecule 1nm 1931 Electron Microscope
Invented 1959 Feyman lectured Theres
Plenty of room at the bottome 1968
Molecular Beam Epitaxy 1981
BinigRohrer STM 1985 Fullerene
Discovered 1986 DrexlerEngines of
Creation 1989 Eigler Wrote IBM using Xe
1990 Iijima discovered CNT 1994
Adleman DNA Computing 1997 IBM
Magnetoresistive head 1998 Dekker
created Transistor from CNT 1999
Tour/Reed molecular switch 2000
Clinton announced NNI 2001 First nerve
cell-silicon microchip built
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???? ???????

• ????? (???)
• ????????
• ????
• ????
• ?? ??

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Size-dependent Properties of Metallic
Nanomaterials

• Density of States
• Surface/Volume ratio large
• Decrease of melting point
• Magnetism
• Colors
• Single electron conductivity
• Catalytic activity

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Surfactant protected CdSe Q-dots
Quantum Confinement
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Color-selective semiconductor nanocrystal laser,
Bawendi et al, Appl. Phys. Lett., Vol. 80, 4615(
2002)
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The photoluminescence emission spectra of CdSe
nanocrystals with different radii (dashed lines)
(a) 2.7 nm, (b) 2.4 nm, (c) 2.1 nm and (d) 1.7 nm
core CdSe
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The Color of metallic Nanoparticles
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tip
capacitance
cluster
tip
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T1/2 Temperature at 50 conversion
Journal of Catalysis 2001, 200, 5968
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?????????

• 1. ?????(laser ablation method)
• 2.???????(metal vapor synthesis)
• 2.1.??????
• 2.2 ??????(VLS)
• 3. ?????(chemical reduction method)
• 3.1 ???????????
• 3.1.1. ?????
• 3.1.2. ????
• 3.1.3. ??????
• 3.1.4 . ???????
• 3.2 ???????????
• 3.2.1. ???(???)
• 3.2.2. Dendrimer

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?? ?????????????????????????????????????????????
????,??????????????????(????????)?
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?? ??????????????/??????????(????????)?
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?? ???????????????????????????????????,?????????
???????,??????(????????)?
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GaN Nanowiresmade in KH Chens Laboratory
100nm
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?? ??????????
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?? ????????????
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??? ??????????
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?? ???????NR4Br???????????
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Fabrication of MMPCs by using the Brust reduction
and the Murray place-displacement reaction to
introduce additional functionalized thiols.
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Gold Nanoparticles made in CY Mous Laboratory
CYMOU
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??? ??????????????????????(?????????)?
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• (a) Space-filling model of ChT. Surface binding
  of the protein by anionic MMPCs focuses on the
  ring of cationic residues situated around the
  active site. Functionally significant residues
  are noted. (b) Relative sizes of ChT and MMPC 1.

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??? ??dendrimer??????????????????????(??????????
)?
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???dendrimer???????(??????????)?