Title: Hierarchically Structured Optical Materials
1Hierarchically Structured Optical Materials
- modulation of photophysical properties
- molecular alignment, anisotropy
- dynamic responses
2 mm
Hexagonal silica/EO20-PO70-EO20 with 1 Rhodamine
6G
2Refractive Index Control Waveguiding
and Amplification
n
waveguides 1.43
mesoporous SiO2 1.15
10 kWcm-2
silicon 3.5
0.8 kWcm-2
P. Yang et al., Science, 282, 2244 (1998)
P. Yang et al., Science, 287, 465 (2000)
3Dynamic Optical Responses in Mesostructured
Materials
G. Wirnsberger et al., Chem. Comm., 119 (2001)
G. Wirnsberger et al., Adv. Mater. 12, 1450
(2000)
Photochromism
Dynamic Response
O
h?1
or heat
h?2
N
N
O
2
O
h?1
or heat
N
N
N
O
N
h?2
4(No Transcript)
5SilicateinNatures Structure-Directing Catalyst
Polymerizes Silica, Methyl- and
Phenyl-silsesquioxanes