What are nanomaterials Flashcards
What are nanomateriels?
Definition of nanotechnology is very arbitrary and adjusted by various
groups
physical effects become significant at
different sizes
What are nano according to British standard institute?
In general, the quantum effects start at length scales < 10 nm.
* British Standard Institute: Nanoscale is defined as < 100 nm
what is nanotechnology?
Nanotechnology involves research and development at the 1-100 nm range.
Nanotechnology creates and uses structures that have novel
properties because of their small scale.
Builds on the ability to control and manipulate at
the atomic scale.
Nanomaterial definition?
A nanomaterial is a material which has at least one engineered dimension <100 nm
what is a nanostructure?
A nanostructure is a structure which has an engineered feature size < 100 nm
Nanotechnology definition
Nanotechnology involves research and technology development at the 1 to 100 nm range.
How many atoms is a nanometer?
1 nanometre is about 3 atoms wide
what is a nanoparticle?
A particle with one or more dimensions < 100 nm
Dimensionality defined as number of macrolength (> 100 nm) dimensions out of
length, width and height
0 Dimensional material
Particle or dot
* No dimensions are macro
1 Dimensional material
Fibre or tube or wire
* 1 dimension (length) is macro
2 Dimensional material
Platelet
* 2 dimensions (length & width) are macro
Agglomerate
held by weak forces (e.g. van der Waal forces)
Aggregate
– held by strong forces (e.g. covalent)
Aggregation is a major issue on the nanoscale due to what?
the innate
stickiness on two similar particles.
Interparticle forces are substantial in what ways?
van de Waal or dispersive forces are due to random fluctuations in
surface charge.
* van de Waals are significant at separations under 100 nm
