Photoinduced formation of thin-film structures in titanium alkoxides via direct deposition from solution and from spin-coated solid-state precursor films

Z. V. Schneider, J. D. Musgraves, K. Simmons-Potter, B. G. Potter, T. J. Boyle

Research output: Contribution to journalArticlepeer-review

Abstract

The photoinduced formation of thin film structures from a Ti-alkoxide precursor (OPy)2Ti(TAP)2, where OPy = OC6H6N, TAP = OC6H2[CH2N(CH3)2] 3-2,4,6, was demonstrated via direct deposition from a pyridine-based solution and by optical illumination of a solid-state spin-coated thin film of the compound. Photopatterned physical relief structures were produced using both of these deposition methods and feature sizes as small as ∼1 μm were readily achieved. Surface investigations of the material's nanostructure revealed that films photo-deposited from solution exhibited nanometer-scale surface roughness with evenly distributed surface porosity (∼10 nm sized pores) while films produced through the illumination of spin-coated thin films exhibited, in comparison, a reduction in surface roughness. Vibrational spectra were compared with the results of quantum chemical computations (density-functional theory) of potential photoproducts in an attempt to identify and distinguish the dominant structural groups resulting from the optical processing of each precursor form (i.e., solution versus solid-state). It was determined that ultraviolet irradiation for both thin-film formation techniques resulted in a disruption of the ligand groups, facilitating the initiation of hydrolysis and condensation reactions in the films.

Original languageEnglish (US)
Pages (from-to)754-762
Number of pages9
JournalJournal of Materials Research
Volume26
Issue number6
DOIs
StatePublished - Mar 28 2011

Keywords

  • Nanostructure
  • Photochemical
  • Sol-gel

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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