Nanotechnology

What does nanotechnology involve

involves manipulating maerials at the nanoscale (1-100nm)

Scale?

materials show different physical and chemical properties

Differences from?

differences arise from quantum effects and large surface area

example of nanotech

ZnO in suncreens is clear in nanoparticle form but white in bulk

properties of nanomaterial surface area

increased surface area, more reactive than bulk materials

properties of nanomaterials unique optical properties

quantam dots glow in different colours depending on size

properties of nanomaterialsmechanical strength and conductivity

CNTs and graphene outperform many bulk materials

Applications of nanotechnology

medicine-drug delivery,electronics-transistor,memory chip,cosmetics-UV filterrs in sunscreens, food packaging-antimicrobial coatins and textiles-selfclearning, anti-wrinkle clothing

CNT description and key propeties

Rolled graphene sheets, strong, conductive, lightweight

graphenes description and key properties

single atom-thick carbon sheet flexible, transparent, good electrical conductor

fullerenes description and key properties

spherical carbon strucutre (C60), potential in drug delivery, electronics, catalysis

nanocomposite

a material formed by combing nanoparticles with bulk substances like plastic or rubber

purpose of nanocomposite and example

enhances properties-strength, flexibility and conductivity. CNTs in aircrafts reduce weight and increase strength

Imagina and manufacturing nano particles imagin tools TEM, SEM, AFM

transmission electron microscope, scanning electron microscope, atomic force microscope (moves individual atoms)

manufacturing methods

grinding, laser ablation, chemical vapour

safety concerns

nanoparticles may be inhaled or absorbed and behave differently in the body

risks of nanomaterials

potential unkown health/environmental effects

precautions of nanomaterials

use PPE (gloves, masks), containment, regulatory oversight

ATM

atomic force microscope

SEM

Scanning electron microscope