Inverse opals with a skeleton structure: Photonic crystals with two complete bandgaps

Advanced Materials

Volumn 14, Issue 20, 2002, Pages 1457-1460

  Dong, W ^a   Bongard, H ^a   Tesche, B ^a   Marlow, F ^a  

^a MAX PLANCK INSTITUT FÜR KOHLENFORSCHUNG   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

BAND STRUCTURE; CHEMICAL BONDS; CONDENSATION; DRYING; HEATING; LIGHT PROPAGATION; REFRACTIVE INDEX; SELF ASSEMBLY; TITANIUM COMPOUNDS;

BANDGAPS; OPALS; PHOTONIC CRYSTALS; RESIDUAL VOLUME STRUCTURE; SKELETON STRUCTURE;

SILICA;

EID: 0037121075     PISSN: 09359648     EISSN: None     Source Type: Journal    
DOI: 10.1002/1521-4095(20021016)14:20<1457::AID-ADMA1457>3.0.CO;2-P     Document Type: Article

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25. air = 0.35355).
26. 3 were infiltrated with a precursor solution consisting of titanium iso-propoxide (typically 80 vol.-%) and ethanol, under argon. After infiltration, the saturated opal was exposed to air for at least 1 h, but preferentially for some days. During this time, the titania precursor reacted with the moisture in the air. Thereafter, the composite of PS and titania was calcined at temperatures between 300 and 700°C in order to remove the PS. The samples showed a strong opalescence. The SEM pictures were taken with a HITACHI 3500N scanning electronic microscope.