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Nanochemistry

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... drug delivery, trap dangerous substances, ... DNA or sensors attached to nanoparticles into cells for treatment, gene therapy or diagnosis. – PowerPoint PPT presentation

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Title: Nanochemistry


1
Nanochemistry
2
Nanochemistry is small!
  • Iron atoms have been
  • arranged on a surface of
  • copper to make two Kanji
  • characters in which
  • together mean atom.
  • On their own, the
  • characters mean original
  • and child in Japanese and
  • Chinese, giving the title
  • for the picture.

3
Objectives
  • Recall the structures of carbon
  • Describe the physical properties of buckminster
    fullerene
  • Learn that carbon can be used to make nanotubes
  • Describe some uses of nanotubes and fullerene
    derivatives

4
Carbon structures
  • Graphite
  • black, opaque, lusterous, slippery,
  • conducts electricity
  • Diamond
  • colourless, clear, lusterous, high
  • m.p., does not conduct electricity
  • Buckminster fullerene
  • Black solid, deep red solution in
  • petrol

5
Nanotubes How big?
  • Nanotubes are being
  • developed for use in
  • computer technology.
  • These tubes are
  • 1-2nm diameter
  • 100mm long

6
How big is that?
7
Nanotubes Fullerene derivatives
8
Nanotubes Uses
  • Biological drug delivery, trap dangerous
    substances, immobilization of enzymes, DNA
    transfection
  • Paints improving strength conductivity
  • Actuators changing electrical energy into
    mechanical energy e.g. robotics
  • Electronics semiconductors, diodes.
  • Chemical industry catalysts e.g. zeolites in
    hydrocarbon cracking
  • Excellent website http//nanotechinkorea.free.fr/
    english/nanoco.php

9
Types of nanotubes
  • Semiconductor
  • It is a chiral nanotube - twists along its
    length.
  • Conductor (metallic)
  • Straight nanotubes
  • Only conducts electricity under specific
    conditions

10
  • Diode
  • The nanotube is used here to connect two
  • electrodes (yellow) on a silicon dioxide base
    (green)
  • Diodes allow a current to travel in one
    direction only
  • Superconductors or Insulators

11
Drug Delivery Buckydrugs
  • Cages made of Buckminster fullerene
  • structures can be used to carry drugs

12
Bacteria can be used to carry drugs, DNA or
sensors attached to nanoparticles into cells for
treatment, gene therapy or diagnosis.
13
Replacing Antibiotics
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