Photopatternable and refractive-index-tunable sol-gel-derived silica-titania nanohybrid materials

Dong Jun Kang, Go Un Park, Hyeon Hwa Lee, Hoy Yul Park, Jang Ung Park

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Silica-titania nanohybrid materials were synthesized using functionalized organosilanes and organically chelated titanium alkoxide in a simple sol-gel process. The synthesized silica-titania nanohybrid materials exhibited good solution processability and homogeneous dispersion without any phase separation regardless of the ratio of the mixture of the two components. The silica-titania nanohybrid materials exhibited good photoinitiator solubility and effective photocurability with a high degree of degree under ultraviolet (UV) exposure. Because of their high photocurability and solution processability, the silica-titania nanohybrid materials were readily converted into silica-titania nanohybrid films and were used for direct photopatterning without requiring the developing process used in the photomask method. In particular, the refractive indices of the silica-titania nanohybrid materials could be decreased by decreasing the content of chelated titanium alkoxide in the materials. Moreover, the silica-titania nanohybrid films exhibited high transmittance in the visible wavelength range, and their surface roughnesses were very smooth, exhibiting values <1 nm. On the basis of these observations, the fabricated silica-titania nanohybrid materials can be used in solution-processable materials for producing optical and electro-optical elements.

Original languageEnglish
Pages (from-to)1732-1737
Number of pages6
JournalCurrent Applied Physics
Volume13
Issue number8
DOIs
Publication statusPublished - 2013 Aug 9

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy(all)

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