Morphological and Structural Study of Vertically Aligned Zinc Oxide Nanorods Grown on Spin Coated Seed Layers

Abstract

In this study, vertically aligned zinc oxide (ZnO) nanorod (NR) arrays were grown with the 2step method. Spin coating was used to apply the seed layer, and by increasing the number of repetitions (n), higher thickness of the seed layer was achieved. The effects of different seed layer thicknesses, spin coated at different rotational speeds (v) and how the variables (v and n) influence the morphological and crystal properties of the resulting ZnO NRs were analyzed. The effects of 1, 3, and 5 (n), with (v) of 3000 or 4000 rpm were investigated, and the formed seed layers were characterized by using scanning electron microscopy (SEM) and X-ray diffraction (XRD) profiles. The ZnO NR arrays were grown by a chemical bath deposition method because of its simplicity and ease of use. Full width at half maximum (FWHM) analysis was conducted on the XRD chart and Raman spectrum to analyze the grain size and Wurtzite distortion of the ZnO NRs. A lower FWHM value was attributed to the lower number of structural disorders in the ZnO NRs, which equated to the most stable or structured Wurtzite structures in the ZnO NRs, achieved at the lowest FWHM value. The lowest FWHM for (002) XRD peak was obtained at 0.35° for ZnO NRs grown with a seed layer spin coated at 4000 rpm once. The crystallite size calculated by Scherrer's equation gave a size of 25.14 nm. The lowest FWHM for E2(High) Raman peak was obtained at 6.00 cm-1 for ZnO NRs grown with a seed layer spin coated at 4000 rpm three times.

Growth of Zinc Oxide Nanorods with the Thickness of Less than or Equal to 1 μm through Zinc Acetate or Zinc Nitrate for Perovskite Solar Cell Applications

“…In this study, a CBD method was reported, involving the application of a waterbath machine as a heat source for the beaker container in order to grow ZnO NRs. is method was also used in the previous research to grow 1.0-1.5 μm long ZnO NRs [35]. e same method was used to grow ZnO NRs with a length of less than or equal to 1.0 μm.…”

Modulating ZnO Growth Structures for Maximum Power Output of Hybrid Piezo/Triboelectric Nanogenerator

“…An equal molar of HMTA was added and stirred at 70 °C for 2 h. Afterward, the seed solution was aged for 24 h at room temperature. [ 48 ] The aged ZnO seed solution was spun coated on cleaned FTO glass at 3000 rpm for 25 s. The substrate was annealed at 350 °C for 1 h.…”

“…An equal molar of HMTA was added and stirred at 70 °C for 2 h. Afterward, the seed solution was aged for 24 h at room temperature. [48] The aged ZnO seed solution was spun coated on cleaned FTO glass at 3000 rpm for 25 s. The substrate was annealed at 350 °C for 1 h. ZnO Nanosheets (ZnO NSs): Zinc acetate dihydrate Zn(CH 3 CO 2 ) 2 .2H 2 O (0.8 g) and 1.25 g of urea were dissolved in 50 mL of DI water and stirred for 30 min to obtain a homogeneous solution. After 30 min of stirring, NH 3 was added to adjust the pH until it reached 8.…”

Synthesis of Schiff Base Encapsulated ZnS Nanoparticles: Characterization and Antibacterial Screening

“…The broad diffraction peaks indicate that the crystallite sizes of the ZnS NPs are small. The average crystallite sizes (L) were then estimated using the Scherrer equation (Yustanti et al, 2016;Bramantyo et al, 2019).…”