CD Skripsi
Sintesis Dan Karakterisasi Lapisan Tipis Zno Menggunakan Metode Silar-Cbd Untuk Aplikasi Material Self-Cleaning
The increasing demand for hygienic, self-disinfecting and contamination-free
surfaces has increased the needs for a self-cleaning protective material or surface. In
this study a zinc oxide (ZnO) based self-cleaning thin film has been synthesized using
a combination of the SILAR (Successive Ionic Layer Adsorption Reaction) method at
the seeding step and the CBD (Chemical Bath Depositon) method at the growth step.
Samples were prepared using 0.01 M Zinc sulfate heptahydrate as a seed solution and
0.05 M Zinc nitrate hexahydrate as a growth solution along with 0.05 M hexamethyle
tetra-ammine as a surfactant at various growth times for 0, 3, 6 and 9 hours. The thin
film samples were characterized using UV-Vis Spectroscopy, XRD and FESEM to
determine UV-Vis absorption, crystal structure and morphology. The UV-Vis
spectrum shows that the maximum absorption occurs in the wavelength range of 245
- 285 nm with a band gap energy of 4.02 - 4.07 eV. The XRD pattern shows the
strongest diffraction peak at an angle of 24.33º of hkl (100) plane and a crystal size of
41.89 nm. The FESEM image shows that the ZnO thin film structure is nanorod with
a hexagonal cross section. The sample with a growth time of 6 hours has the most
orderly and homogeneous morphology. The average diameter nanorod are ranging
from 142.68 ± 45.40 nm to 203.92 ± 83.39 nm. The ZnO thin film were then applied
as a self-cleaning material by the sessile-drop method. The observation shows that the
ZnO thin film a growth time of 6 hours with a contact angle of 95,7º is the most
hydrophobic surface (>90º) which can be applied as a self-cleaning material an
industrial scale.
Key words : ZnO thin film, SILAR-CBD method, Self-Cleaning.
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