Some applications of nanoscience in chemistry
Dr. Layla Al Juhaiman
physical chemistry
King saud University
I-Definition of nanoparticles
'Nano’ is used in the world of science to mean 10-9. A nanometer is only ten atoms across! So generally nanotechnology is used to mean technology at the nanometer level.
-“Nanotechnologies are the design, characterization, production and application of structures, devices and systems by controlling shape and size at nanometer scale
II-Why nanoparticles (NP) are important?
At such scale ordinary rules of physics and chemistry no longer apply. Materials' characteristics, such as their colour, strength, conductivity and reactivity, can differ substantially between the nanoscale and the macro.
III-Some applications of nanoparticles.
*** Chemistry
Catalysis : Using NP as promoters in many reactions
Polymer : Addition of NP change properties of polymers
Electrochemistry : Solar energy cells (photovoltaics)
***Electronics :New forms of computer memory, electronic circuits,etc
V-Environmental aspect of nanotechnology
Developing instruments to evaluate exposure of nanomaterials to air and water. Finding methods to study the toxicity of nanomaterials,
VI- References
1. www.nanotec.org.uk/evidence/78aRSC.htm
2. Science 2007, 315, 358
3. Nat. Nanotechnol. 2007, 2, 21
4. Science 2006, 314, 274
5. Nature 2006, 439, 55.