Synthesis, structure, and optical properties of Au–TiO2 composite thin films

Ranade, Alpana N.; Fulton, Christopher J.; Seebergh, Jill E.; Nichols, Mark; Remillard, J. T.; Graham, Michael E.; Chung, Yip Wah

doi:10.1016/j.tsf.2010.08.083

Cited by 4 publications

(1 citation statement)

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“…Titanium dioxide is also a principal component used in planar waveguide technology [14,15]. Several synthesis methods concerning titanium dioxide thin films are described in the literature, such as e-beam evaporation [2], magnetron sputtering [7,16], ultrasonic spray pyrolysis [17], chemical vapor deposition [18,19], metal organic chemical vapor deposition [13], pulsed laser deposition [20], and sol-gel method [1, 5,6,[9][10][11][12][13]. The sol-gel method has advantages, due to low temperature processing, easy coating of large area, and being suitable for preparation of porous films and homogeneous multicomponent oxide films.…”

Section: Introductionmentioning

confidence: 99%

Nano-sized blue spectral shift in sol–gel derived mesoporous titania films

Karasiński

Gondek

Drewniak

et al. 2011

J Sol-Gel Sci Technol

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Following the spectral energy shift of the energy gap (blue shift) of the TiO 2 sol-gel derived films we have evaluated diameters of the nanocrystallites. The TiO 2 films were deposited by dip-coating technique. Two types of mesoporous films were studied: films with porosity *16% and refractive index (2.15 at wavelength 633 nm) and films with porosity *46% and refractive index (1.61 at wavelength 633 nm). High porosity and consequently low refractive index was achieved by adding the non-ionic surfactant Triton X-100 to the starting solution as template. The principal goal of the work is to establish the influence of the Triton X-100 on the morphology as well as to establish a possible correlation between the morphology and optical features of the titania films. The surface morphology was explored using AFM method. And the energy gap was determined from the transmission spectra. Analysis of the blue energy spectral shift is performed following the excitonic model.

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