What is a “nano” ?  A unit of measurement  1 x or

Nanoparticles  Particles of a material that are VERY small, measured in nanometers  Possess specific chemical and physical characteristics due to their small size  Chemical/physical properties of a material CHANGES as a result of size reduction.  Increased surface area----small size

OLD Practice, New Concept

How do the properties change?  Electrical properties  Differ in conductivity between graphene sheets and carbon nanotubes of graphite  Reaction properties  Possible increase in reaction rates  Enhanced catalytic function  Ex. Gold, aluminum

Wide Variety of Purposes  Medicine  Engineering  Research  Electricity