Transmittance of TiO2 Nanoparticle-based Films Deposited by CO2 Laser Heating

Yahya Bougdid; Francois Chenard; John Sugrim; Ranganathan Kumar; Aravinda Kar

doi:10.1117/12.2647981

17 March 2023 Transmittance of TiO₂ nanoparticle-based films deposited by CO₂ laser heating

Yahya Bougdid, Francois Chenard, John Sugrim, Ranganathan Kumar, Aravinda Kar

Proceedings Volume 12412, Laser 3D Manufacturing X; 1241209 (2023) https://doi.org/10.1117/12.2647981
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

Nanoelectrospray laser deposition (NELD) of semiconductor and metal nanoparticles is a powerful and potential technology for the on-demand printing of precise and complex functional microarchitectures. In this study, a CO₂ laser is used to deposit and sinter titanium dioxide (TiO₂) nanoparticles on borosilicate and quartz substrates for transparent film applications. The CO₂ laser is chosen for sintering because TiO₂ has a lower spectral absorption at 10.6 μm wavelength. Therefore, the 10.6 μm laser can transmit through the deposited TiO₂ films, and then, the whole film thickness can be thermally modified by the heating effect of laser. The effects of wet-deposition process parameters and laser processing parameters on the morphological, optical, and structural properties of TiO₂ patterns are examined. The TiO₂ microstructure and surface morphology were studied by optical and scanning electron microscopy techniques. X-ray diffraction (XRD) was used to investigate the structural characteristics after laser sintering. The optical transmittance of the wet and sintered TiO₂ films was characterized by UV/Vis/NIR spectrophotometry. We established that the overall improvement of the morphological and optical properties of the sintered films originates from the enhanced bonding and physical interconnectivity of TiO₂ nanoparticles, resulting in the formation of a dense and compact ceramic layer. XRD data points out that the anatase phase of TiO₂ is preserved after laser sintering, eliminating the presence of TiO₂ rutile traces. An average transmittance above ~90% was achieved in the NIR region.

Conference Presentation

Citation Download Citation

Yahya Bougdid, Francois Chenard, John Sugrim, Ranganathan Kumar, and Aravinda Kar "Transmittance of TiO₂ nanoparticle-based films deposited by CO₂ laser heating", Proc. SPIE 12412, Laser 3D Manufacturing X, 1241209 (17 March 2023); https://doi.org/10.1117/12.2647981

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