6. Template-assisted nanostructuring (Overview)
Self-assembled diblock
copolymer nanostructure
Mesoporous gyroid
film on conducting FTO
Electrodeposition
of functional materials:
Ni, NiO, V2O5, TiO2, ...
Versatile method
Assembly of functional devices
Selective removal
of organic template
E. Crossland et al., Nano Letters, 2009, 9(8):2807-2812
E. Crossland et al., Nano Letters, 2009, 9(8):2813-2819
7. Diblock copolymer microphase-separation
• Macrophase-separation of homopolymer blends
• Immiscible polymers demix
• Occurs on the micron-scale
• Microphase-separation of diblock copolymers
• Immiscible blocks demix
• Occurs on the nanometre-scale, since the
two blocks are covalently bound
P. Flory, Journal of Chemical Physics, 1942, 10:51–61
M. Huggins, Annuals of the NY Academy of Sciences, 1942, 43:1–32
8. Double-gyroid morphology (Ia3d)
Two subvolumes: (majority 62% and minority 38% phase)
• interconnected
• self-supporting
• extremely high surface area
• robust
Video Gyroid animation
Michielsen et al., Journal of the Royal Society interface, 2010
Advanced Materials, 2009, 21(38):3928-3932
13. Where does colour come from?
Pigment colours
white light
Structural colours
white light
red
pigment
Scattered red light
- rest of light absorbed
blue
bright, pure, directional
- Iridescence -