Morphological, Optical, and Surface Wettability Analysis of Electron-Beam Synthesized Annealed TiO2 NW/Au TF

Nanda, RK and Nath, A and Singh, LR and Sarkar, MB (2023) Morphological, Optical, and Surface Wettability Analysis of Electron-Beam Synthesized Annealed TiO2 NW/Au TF. In: Brazilian Journal of Physics, 53 (4).

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Abstract

Self-cleaning surfaces have attracted much attention for the need to develop self-disinfected and hygienic surfaces. Surface wettability through nanomaterial fabrication has enticed the interest of researchers. The glancing angle deposition (GLAD) technique was implemented inside an electron-beam chamber to fabricate titanium oxide (TiO2) nanowire (NW) on n-type silicon (Si) substrate. Gold (Au) thin film (TF) was synthesized on top of bare TiO2 NW, and then the sample was annealed at 950 °C. The sample morphology was investigated using field emission scanning electron microscopy (FESEM), energy-dispersive analysis of X-rays (EDAX), high-resolution transmission electron microscopy (HR-TEM), and selective area diffraction (SAED) pattern analysis. The surface roughness of the samples was examined by high-resolution atomic force microscopy (HR-AFM) analysis. The photoluminescence (PL) spectrums were used to analyze the optical properties. The static contact angles of 113.2° and 41.2° were identified for the bare TiO2 NW and annealed TiO2 NW/Au TF samples, respectively. For 90 min, water contact angle was reduced from 113.2 to 82.5° for the bare TiO2 NW and from 41.2 to 14.2° for the annealed TiO2 NW/Au TF sample. The sliding angles of 17.53° and 38.1°, the maximum frictional forces of 11.8 μN and 24.19 μN, in addition with the work of adhesions of 43.64 mN/m and 126.17 mN/m have also been calculated for the bare TiO2 NW and annealed TiO2 NW/Au TF samples, respectively. The enhanced characteristics of the annealed TiO2 NW/Au TF samples indicate an excellent potential for the applications of smart tiles, anti-fogging, and self-cleaning surfaces.

Item Type:	Journal Article
Publication:	Brazilian Journal of Physics
Publisher:	Springer
Additional Information:	The copyright for this article belongs to Springer.
Keywords:	Annealing; Contact angle; Glancing angle deposition; Nanowire; Surface wettability; Titanium dioxide
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	15 Jun 2023 05:43
Last Modified:	15 Jun 2023 05:43
URI:	https://eprints.iisc.ac.in/id/eprint/81935

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