One-pot synthesis of multifunctional ZnO nanomaterials: study of superhydrophobicity and UV photosensing property

Abstract

ZnO nanomaterials are synthesized using one-pot synthesis method. Equimolar solution of Zinc Nitrate hexahydrate (Zn(NO 3 ) 2 .6H 2 O) and Hexamethylenetetramine (C 6 H 12 N 4 ) is used as a precursor for ZnO formation. Different nanostructures of ZnO are achieved by controlling the pH of the growth solution in the range 2-12 (acidic to alkali). ZnO nanostructures are evaluated for hydrophobic property using static contact angle measurement setup and UV photosensing activity. Surface morphology, structural properties and compositional analysis of ZnO nanostructures are examined by field emission scanning electron microscope (FE-SEM), energy dispersive X-ray analysis (EDX), high-resolution transmission electron microscope (FEG-TEM) and X-ray diffraction (XRD) measurements. Existence of ZnO wurtzite structure is confirmed from XRD study and is analyzed by Rietveld refinement method. Nanomaterials are characterized using Raman spectroscopy which confirms highest oxygen deficiency in ZnO nanorods. The material shows remarkable superhydrophobic and UV photosensing property and hence the name multifunctional. Among all morphologies grown at different pH values, ZnO nanorods show superhydrophobic nature with contact angle more than 170°. Total surface energy value of ZnO nanostructures is calculated using Wendt two-component theory. Different ZnO nanostructures (with variation of pH value) are used to study UV photosensing property. Responsivity and photocurrent show a strong dependence on the morphology of ZnO.

Dielectric Metasurface from Solution‐Phase Epitaxy of ZnO Nanorods for Subtractive Color Filter Application

“…Note that the spacing between the adjacent lattice planes is ≈0.26 nm, which is close to the reported values for the wurtzite structure of ZnO. [33][34][35] To obtain the crystal structure of this nanorod, selective area electron diffraction (SAED) was conducted within the region enclosed by the black dashed circle in Figure 3a. We note that the characterization region covers the majority of the nanorod, and thus, the diffraction pattern in the inset of Figure 3a implies that the grown nanorod is most likely a single crystal.…”

Electrochemical synthesis of hydroxyl group-functionalized PProDOT/ZnO for an ultraviolet photodetector

“…b) shows the FT-IR spectra of ZnO, PProDOT, PProDOT-OH, ZnO/PProDOT and ZnO/PProDOT-OH composites. As shown in the spectra, ZnO found many tensile and bending vibration peaks near 3376, 2920, 1600, 1408, 870 cm À1 , which is attributed to the water adsorption on the surface of ZnO at room temperature 44. These peaks can also be found in ZnO/PProDOT and ZnO/PProDOT-OH composites, which indicates that ZnO/PProDOT and ZnO/PProDOT-OH composites have been successfully prepared.…”

Magnetotransport Studies of Encapsulated Topological Insulator Bi2Se3 Nanoribbons

“…The d -spacing value estimated from the lattice fringes of Bi 2 Se 3 is 0.21 nm, which is in good agreement with the previous studies [ 22 ]. The d -spacing value determined for the ZnO of 0.28 nm corresponds to (100) planes of hexagonal wurtzite [ 24 ]. The interface between the Bi 2 Se 3 and ZnO is separated by a layer of amorphous material, with a thickness of ~1.5–2 nm.…”