Ordered macroporous rutile titanium dioxide by emulsion templating

Vinothan N. Manoharan, Arnout Imhof, James D. Thorne, David J. Pine

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We discuss a method for fabricating photonic crystals of closely packed air spheres with diameters on the order of 300 nm in a rutile titania matrix. These differ from the air sphere/titania materials reported elsewhere in that the matrix is the high-index rutile phase of titania (n≈2.9) as opposed to the low-index anatase phase (n≈2.4). We make these materials by a sol-gel process with oil-in-formamide emulsions as templates. The emulsion droplets are stable and have a polydispersity of 15% or less, allowing them to form small colloidal crystallites when concentrated in a titania sol. The oil template can be removed after gelation of the sol and prior to drying, allowing us to produce monolithic samples with few cracks. Calcination at 1000 °C converts the structure to the rutile phase with an average crystallite size of 60 nm. Optical transmission spectra show the presence of a broad minimum at a wavelength of 500 nm for a sample with ordered 200 nm pores.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages44-50
Number of pages7
Volume3937
StatePublished - 2000
EventMicro- and Nano-Photonic Materials and Devices - San Jose, CA, USA
Duration: Jan 27 2000Jan 28 2000

Other

OtherMicro- and Nano-Photonic Materials and Devices
CitySan Jose, CA, USA
Period1/27/001/28/00

Fingerprint

titanium oxides
rutile
Titanium dioxide
emulsions
Emulsions
titanium
Titanium
Sols
templates
oils
air
Polydispersity
gelation
Gelation
sol-gel processes
Crystallite size
matrices
Light transmission
Air
Photonic crystals

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Manoharan, V. N., Imhof, A., Thorne, J. D., & Pine, D. J. (2000). Ordered macroporous rutile titanium dioxide by emulsion templating. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3937, pp. 44-50). Society of Photo-Optical Instrumentation Engineers.

Ordered macroporous rutile titanium dioxide by emulsion templating. / Manoharan, Vinothan N.; Imhof, Arnout; Thorne, James D.; Pine, David J.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3937 Society of Photo-Optical Instrumentation Engineers, 2000. p. 44-50.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Manoharan, VN, Imhof, A, Thorne, JD & Pine, DJ 2000, Ordered macroporous rutile titanium dioxide by emulsion templating. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 3937, Society of Photo-Optical Instrumentation Engineers, pp. 44-50, Micro- and Nano-Photonic Materials and Devices, San Jose, CA, USA, 1/27/00.
Manoharan VN, Imhof A, Thorne JD, Pine DJ. Ordered macroporous rutile titanium dioxide by emulsion templating. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3937. Society of Photo-Optical Instrumentation Engineers. 2000. p. 44-50
Manoharan, Vinothan N. ; Imhof, Arnout ; Thorne, James D. ; Pine, David J. / Ordered macroporous rutile titanium dioxide by emulsion templating. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3937 Society of Photo-Optical Instrumentation Engineers, 2000. pp. 44-50
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