Mesoporous dye-doped titanium dioxide for micro-optoelectronic applications

Vogel, Robert, Meredith, Paul, Kartini, Indriana, Harvey, Michael, Riches, Jamie D., Bishop, Alexis, Heckenberg, Norman, Trau, Matt and Rubinsztein-Dunlop, Halina (2003) Mesoporous dye-doped titanium dioxide for micro-optoelectronic applications. ChemPhysChem, 4 6: 595-603. doi:10.1002/cphc.200200494


Author Vogel, Robert
Meredith, Paul
Kartini, Indriana
Harvey, Michael
Riches, Jamie D.
Bishop, Alexis
Heckenberg, Norman
Trau, Matt
Rubinsztein-Dunlop, Halina
Title Mesoporous dye-doped titanium dioxide for micro-optoelectronic applications
Journal name ChemPhysChem   Check publisher's open access policy
ISSN 1439-4235
Publication date 2003-06-06
Year available 2003
Sub-type Article (original research)
DOI 10.1002/cphc.200200494
Open Access Status Not yet assessed
Volume 4
Issue 6
Start page 595
End page 603
Total pages 9
Place of publication Weinheim, Germany
Publisher Wiley-VCH
Language eng
Subject 240402 Quantum Optics and Lasers
09 Engineering
1007 Nanotechnology
Abstract Optically transparent, mesostructured titanium dioxide thin films were fabricated using an amphiphilic poly(alkylene oxide) block copolymer template in combination with retarded hydrolysis of a titanium isopropoxide precursor. Prior to calcination, the films displayed a stable hexagonal mesophase and high refractive indices (1.5 to 1.6) relative to mesostructured silica (1.43). After calcination, the hexagonal mesophase was retained with surface areas >300 m2 g-1. The dye Rhodamine 6G (commonly used as a laser dye) was incorporated into the copolymer micelle during the templating process. In this way, novel dye-doped mesostructured titanium dioxide films were synthesised. The copolymer not only directs the film structure, but also provides a solubilizing environment suitable for sustaining a high monomer-to-aggregate ratio at elevated dye concentrations. The dye-doped films displayed optical thresholdlike behaviour characteristic of amplified spontaneous emission. Soft lithography was successfully applied to micropattern the dye-doped films. These results pave the way for the fabrication and demonstration of novel microlaser structures and other active optical structures. This new, high-refractive index, mesostructured, dye-doped material could also find applications in areas such as optical coatings, displays and integrated photonic devices.
Keyword Laser science
Biophotonics
Mesoporous materials
Microlasers
Soft lithography
Thin films
Titanium dioxide
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Physical Sciences Publications
 
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Created: Wed, 04 Apr 2007, 22:14:57 EST by Kaye Eldridge on behalf of School of Mathematics & Physics