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In order to allow the titanium dioxide film to enhance its characteristics and observe the hydrophilic effect, the TiO2 film was deposited by a continuous sputtering machine, which was three film thicknesses (film thickness 5 nm, film thickness 15 nm, film thickness 50 nm). In the treatment and post-production mode, the physical properties of the original Tio2 are retained; when the characteristics are analyzed at different thicknesses, the analysis is compared, and the microstructure analysis is observed by atomic force microscopy (AFM); the hydrophilicity is tested by the water drop angle; UV-visible (UV-VIS) spectrometer for optical characterization. From the experimental data, it was found that the roughness of the film surface roughness (RA=0.46 nm), the roughness of the film thickness of 15 nm (RA=0.39 nm), and the roughness of the film thickness of 50 nm (RA=0.86 nm). From this, it is understood that when the film thickness is 15 nm, the surface roughness is preferable.
In the measurement of the water drop angle, the contact angle of the 5 nm film thickness (51.81 degrees), the contact angle of the film thickness of 15 nm (51.60 degrees), and the contact angle of the film thickness of 50 nm (61.78 degrees) were found on the surface of different titanium dioxide films. It can be seen that when the film thickness is 5 nm and the film thickness is 15 nm, the contact angle of the coating film is not much different, and the contact angle is smaller than the film thickness of 50 nm. It is found that the 50 nm hydrophilicity is the worst, and the film structure is inferior to the film thickness of 5 nm and The film thickness was 15 nm.
The optical characteristic analysis results of UV-VIS spectrometer were used to find the average visible light transmittance and near-infrared reflectance (96.89%, 10.81%) of the film thickness of 5 nm, and the average visible light transmittance of the film thickness of 15 nm. And near-infrared reflectance (90.53%, 13.16%), 50 nm visible light transmittance and near-infrared reflectance (66.34%, 21.41%), it is known that when the film thickness is 5 nm optical properties, slightly better than the film thickness At 15 nm, it is obviously better than nearly 30% of 50 nm. It can be seen that when the film thickness is 5 NM, the average visible light transmittance and near-infrared reflectance are better, followed by 15 nm, but the performance at 50 nm is poor.
Based on the experimental results of this study, it is found that when the thickness of the titanium dioxide film is not 5 mm, the surface roughness is better (0.39 nm), and the contact angle between the coating surface and 15 nm is not much different. However, compared with the 50 nm film thickness, the contact angle is small, and it can be seen that in order to maintain its hydrophilic effect, glass having a TiO2 film thickness of 50 nm should not be used.
Therefore, when the TIO2 coated glass is used at different film thicknesses, the optical and physical effects produced by the TIO2 will be significantly different.
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