Role of binder in sol-gel synthesis of Ta 2O 5 films for photonic crystal fabrication

Nicholas Ndiege, Tabitha Wilhoite, Vaidyanathan Subramanian, Edmund G. Seebauer, Mark A. Shannon, Richard I. Masel

Research output: Contribution to conferencePaperpeer-review

Abstract

Advances in microelectromechanical systems has generated an ever growing demand for novel insulating material applicable to high temperature systems. Photonic bandgap materials are appealing for such applications, specifically Ta 2O 5 due to its high index of refraction, refractory nature and negligible absorbance in the infrared region. The challenge faced in the realization of such materials is the synthesis of Ta 2O 5 films whose thickness is in the order of a quarter wavelength of the incident infrared. This work seeks to investigate the effect of addition of polyvinyl pyrollidone (PVP) binder material in the sol gel synthesis of thick, uniform and crack free Ta 2O 5 films. Incorporation of PVP into the sol precursor has enabled uniform and crack free films with thicknesses of up to 1.6 microns to be realized. Chemical probing of the precursor was conducted via TGA, FTIR, and NMR analysis of the sol to elucidate the processes behind this film formation. The calcined oxide films were characterized via SEM, XRD and XPS.

Original languageEnglish (US)
Pages5363-5383
Number of pages21
StatePublished - Dec 1 2005
Externally publishedYes
Event05AIChE: 2005 AIChE Annual Meeting and Fall Showcase - Cincinnati, OH, United States
Duration: Oct 30 2005Nov 4 2005

Other

Other05AIChE: 2005 AIChE Annual Meeting and Fall Showcase
Country/TerritoryUnited States
CityCincinnati, OH
Period10/30/0511/4/05

Keywords

  • PVP
  • Photonic bandgap
  • Photonic crystals
  • Sol gel
  • Ta O film
  • Thick films

ASJC Scopus subject areas

  • Engineering(all)

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