Zinc Oxide Nanorods Thin Films Research Articles

Surface-Catalyzed Zinc Oxide Nanorods and Interconnected Tetrapods as Efficient Methane Gas Sensing Platforms

Nanostructured metal oxide semiconductors have proven to be promising for the gas sensing domain. However, there are challenges associated with the fabrication of high-performance, low-to-room-temperature operation sensors for methane and other gases, including hydrogen sulfide, carbon dioxide, and ammonia. The functional properties of these semiconducting oxides can be improved by altering the morphology, crystal size, shape, and topology. Zinc oxide (ZnO) is an attractive option for gas sensing, but the need for elevated operating temperatures has limited its practical use as a commercial gas sensor. In this work, we prepared ZnO nanorod (ZnO-NR) arrays and interconnected tetrapod ZnO (T-ZnO) network sensing platforms as chemiresistive methane sensors on silicon substrates with platinum interdigitated electrodes and systematically characterized their methane sensing response in addition to their structural and physical properties. We also conducted surface modification by photochemical-catalyzed palladium, Pd, and Pd-Ag alloy nanoparticles and compared the uniformly distributed Pd decoration versus arrayed dots. The sensing performance was assessed in terms of target gas response magnitude (RM) and response percentage (R) recorded by changes in electrical resistance upon exposure to varying methane concentration (100–10,000 ppm) under thermal (operating temperatures = 175, 200, 230 °C) and optical (UV A, 365 nm illumination) excitations alongside response/recovery times, and limit of detection quantification. Thin film sensing platforms based on T-ZnO exhibited the highest response at 200 °C (RM = 2.98; R = 66.4%) compared to ZnO-NR thin films at 230 °C (RM = 1.34; R = 25.5%), attributed to the interconnected network and effective bandgap and barrier height reduction of the T-ZnO. The Pd-Ag-catalyzed and Pd dot-catalyzed T-ZnO films had the fastest response and recovery rates at 200 °C and room temperature under UV excitation, due to the localized Pd nanoparticles dots resulting in nano Schottky barrier formation, as opposed to the films coated with uniformly distributed Pd nanoparticles. The experimental findings present morphological differences, identify various mechanistic aspects, and discern chemical pathways for methane sensing.

Structure, functional groups, and optical properties of Al doped ZnO nanorods thin films

Zinc oxide (ZnO) in the form of thin films is a semiconductor that has a direct energy gap of 3.37 eV and an exciton binding energy of 60 meV. These attractive properties make ZnO widely used as a transparent conducting material application in liquid crystal displays, solar cells, etc. Undoped and doped ZnO thin films are widely used in transparent conductor layers due to their better thermal resistance and resistance. In this study, thin films of Al doped ZnO (Zn1-xAlxO) nanorods (x = 1 wt% and 3 wt%) were synthesized by hydrothermal method. The effect of Al doping on microstructure, binding vibration, and optical properties was characterized by XRD (X-Ray Diffraction), SEM (Scanning Electron Microscopy), FTIR (Fourier Transform Infra Red) and UV–Vis (Ultraviolet–visible light) Spectroscopy. Furthermore, the (002) peak of ZnO was shifted because of Al doped ZnO. The diameter of hexagonal is around 78 nm. The binding vibrations found are Zn-O (531, 512, 985, 911 cm−1), Al-O (812 cm−1), Zn-hydroxyl group (1132, 1107 cm−1), CH3 group (2167, 2837, 2861 cm−1), and the hydroxyl group (3560, 3547 cm−1). The energy gap had a moderate drop from 2.97 eV to 2.95 eV.

ZnO Multilayer Thin Films as The Seed Layer for ZnO Nanorods: Morphology, Structural and Optical properties

The effect of zinc oxide (ZnO) multilayer thin film thicknesses, deposited via the sol-gel spin coating technique, on the morphology, structural and optical properties of ZnO nanorods (ZNR) grown on the ZnO thin films were explored in this investigation. The ZNR was grown using the chemical bath deposition method on the ZnO thin film seed layer (SL). We found that ZnO thin film SL morphology changes according to the number of layers based on the results. Eventually, these changes also influence the structures of ZNR. ZNR structures improved when the thickness of the seed layer increased. Besides the surface roughness, better crystalline quality films were obtained when more layers were deposited. This crystalline quality then influenced the optical characteristics of both ZnO and ZNR thin films. The optical properties from UV-Vis showed transmittance in the visible region, showing that the ZnO films produced were suitable to be applied to solar cells. ZNR-based solar cells have become one of the promising materials to be studied further due to the environment-friendly, low-cost, and well-abundant material for solar cell applications.

Ionization Radiation Shielding Effectiveness of Lead Acetate, Lead Nitrate, and Bismuth Nitrate-Doped Zinc Oxide Nanorods Thin Films: A Comparative Evaluation.

The fabrication of Nano-based shielding materials is an advancing research area in material sciences and nanotechnology. Although bulky lead-based products remain the primary choice for radiation protection, environmental disadvantages and high toxicity limit their potentials, necessitating less costly, compatible, eco-friendly, and light-weight alternatives. The theme of the presented investigation is to compare the ionization radiation shielding potentialities of the lead acetate (LA), lead nitrate (LN), and bismuth nitrate (BN)-doped zinc oxide nanorods-based thin films (ZONRs-TFs) produced via the chemical bath deposition (CBD) technique. The impact of the selected materials’ doping content on morphological and structural properties of ZONRs-TF was investigated. The X-ray diffractometer (XRD) analyses of both undoped and doped TFs revealed the existence of hexagonal quartzite crystal structures. The composition analysis by energy dispersive (EDX) detected the corrected elemental compositions of the deposited films. Field emission scanning electronic microscope (FESEM) images of the TFs showed highly porous and irregular surface morphologies of the randomly aligned NRs with cracks and voids. The undoped and 2 wt.% BN-doped TFs showed the smallest and largest grain size of 10.44 nm and 38.98 nm, respectively. The linear attenuation coefficient (µ) values of all the optimally doped ZONRs-TFs measured against the X-ray photon irradiation disclosed their excrement shielding potency. The measured µ values of the ZONRs-TFs displayed the trend of 1 wt.% LA-doped TF > 1 wt.% LN-doped TF > 3 wt.% BN-doped TF > undoped TFs). The values of μ of the ZONRs-TFs can be customized by adjusting the doping contents, which in turn controls the thickness and morphology of the TFs. In short, the proposed new types of the LA-, LN- and BN-doped ZONRs-TFs may contribute towards the development of the prospective ionization radiation shielding materials.

Photocatalytic activity and photoelectrochemical properties of Ag/ZnO core/shell nanorods under low-intensity white light irradiation

Zinc oxide (ZnO) nanorod thin films were prepared by CBD onto glass and FTO/glass substrates. Silver (Ag) nanoparticles were synthesized on the surface of the prepared ZnO nanorod thin films using electrochemical methods. The scanning electron microscopy images of the Ag/ZnO/glass core/shell nanostructure confirmed that the average particles size is 20 nm while it was 41 nm for Ag NPs that synthesized onto ZnO/FTO NRs. The photocatalytic activity of the prepared Ag/ZnO core/shell nanostructure was studied by analyzing the degradation of methylene blue (MB) dye under visible light. Various pH values (6 and 10) and exposure time (30–240) min were controlled to investigate the photocatalytic activity of as-prepared Ag/ZnO core/shell nanostructure and that annealed at 200 °C and 300 °C for 1 h. It was observed that when the pH was 6, the degradation rate increased with the annealing temperature and irradiation time reaching 51% at the annealing temperature of 300 °C and exposure time of 240 min. In other hands, when the pH was 10, and the sample was annealed at 200 °C, it showed a good degradation rate of 100% at the irradiation time of 90 min. By contrast, the sample annealed at 300 °C required 180 min to degrade the MB dye completely. The photoelectrochemical cell measurement based on photocurrent density revealed a slight response to light. Cycle voltammetry (CV) measurement was conducted, and the CV curves of the Ag/ZnO core/shell electrodes indicated nonfaradaic and pseudocapacitance behavior. The electrodes showed nearly rectangular CV curves, which indicated the dominance of the nonfaradaic capacitance behavior. The specific capacitance of the electrodes remained at approximately 99%. Mott–Schottky analysis revealed that the semiconductor was an n-type with dependence on flat band potential V FB deviation in the negative direction.

ICMMS-2: Zinc Oxide nano-rods: Challenges for Glucose Biosensors

Zinc oxide nano-rod thin films (ZNR) will be deposited on silicon substrate (ZNRS) and borosilicate glass capillary tube tip (0.5 and 0.7 µm as inner and outer diameters, respectively) (ZNRT) using both Sol-Gel (SG) and aqueous chemical growth (ACG) techniques for glucose biosensor fabrication. It will be functionalized with membranes or enzymes to produce selective glucose biosensor for glucose concentration measurements in extracellular solutions. The prepared thin film samples provided a favourable environment for the glucose oxidase (GOD) immobilization and introduced a shuttling way for electronic communication between electrodes and GOD. The prepared ZNRS and ZNRT structures and morphologies will be characterized by X-ray diffraction (XRD) and Field emission high resolution scanning electron microscopy (FESEM).

C-axis oriented ZnO nanorods based quantum dot solar cells

In this work, for the growth of ZnO (Zinc Oxide) nanorod thin films, the seed layer is prepared by sol-gel dip coating and spin coating methods. We studied the effect of seed layer on structural and optical properties of the ZnO nanorods. FESEM image revealed the difference between the growth of ZnO nanorods on spin and sol-gel dip coated seed layers. It has been observed that ZnO nanorods with uniform size and highly oriented along the c-axis have been grown on spin coated seed layer. HRTEM and Transmission electron microscopy study shows that the ZnO nanorods have an average length of 300 nm and the average diameter is 50 nm, the interplanner spacing is found to be d = 2.63 Å. The X-ray diffraction pattern revealed that the ZnO nanorods are of hexagonal structure. Absorption spectra showed that the ZnO nanorods exhibit UV absorption with absorption peak at 365 nm and the optical band gap has been found to be 3.23 eV. PL spectra indicated the presence of UV and visible emission lying in the range of 380–550 nm. ZnO nanorods based solar cells have been constructed using CdSe quantum dots.

Comprehensive experimental study on production of vertically aligned ZnO nanorod thin films and their electrical, optical and antimicrobial properties

One-dimensional (1D) zinc oxide (ZnO) nanomaterials (e.g. nanorods, nanowires) are the most important due to their electrical and optical properties. As the surface-to-volume ratio in ZnO nanorods (NRs) is very high, the surface states have a crucial role on optical and other properties. So, determination of the production parameters of the ZnO-NRs is important. In this study, a well-aligned ZnO-NRs thin film was produced via the sol–gel and hydrothermal methods. For this purpose, in the first step, a ZnO seed layer was coated onto a cleaned microscope glass slide (sizes of 1.25 × 3.75 cm) by the sol–gel spin coating method. In the second step, ZnO-NRs were grown on the ZnO seed layer by the hydrothermal method. Production parameters for the first step, such as type of the zinc salt; type of the solvent; solution concentration; type of the stabilizer; ageing time process of the solution; spin speed; duration of the spin process; number of repeated coating cycle; heating treatment temperature between coating cycles; duration between coating cycles; final heating treatment temperature and final heating treatment duration of the ZnO seed layer, were obtained. Then similar optimization processes were repeated for the second stage for the ZnO-NRs. The crystal structure, morphological and optical properties of all the produced samples were characterized via X-ray diffraction (XRD) spectroscopy; scanning electron microscopy (SEM); and ultraviolet–visible (UV–Vis) spectroscopy. For comparison, ZnO-NR powders were produced via the mechanochemical solid-state combustion method. The electrical conductivity and optical transparency of the ZnO-NR thin film samples were higher than those of the ZnO-NR powder sample. It was also observed that the well-aligned ZnO-NR thin film sample had a higher bactericidal effect against Bacillus thuringiensis than the ZnO-NR powder sample.

Temperature Effect of Chemical Bath Deposition (CBD) to Fabrication and Characterization of Zinc Oxide Nanorods Thin Films Based Gas Sensing: Ethanol

Fabrication of zinc oxide (ZnO) nanorods thin films based gas sensing ethanol have been done. Ethanol belongs to volatile organic compound (VOC) that are dangerous if inhaled by humans in high concentrations, so that its detection is necessary. Temperature as kinetic controller of chemical bath deposition (CBD) process take effect to ZnO fabrication and characterization. ZnO nanorods thin films was synthesized onto glass substrate by dip-coating technique. ZnO nanorods was grown using Zn(NO3)2.4H2O and HMTA with ratio 1:1 under CBD condition at temperature 75°C, 83°C, and 87°C. Result of SEM showing ZnO CBD 83°C has nanorods shape with diameter size is 95.56 nm, furthermore at 75°C the formation of the nanorods was not completed yet while at nanorods became deconstructed. XRD result showed all of ZnO sample have hexagonal wurzite which are match well with ICDS-094004 card. Ethanol gas sensing tested at 100°C, 150°C, 200°C showed high sensitivity of the sensor up to 77.31% for ZnO CBD 75°C at 100°C. ZnO CDB 83°C sample at test 200°C have highest response on 2.22 min (tres) and 0.45 min (trec). Time respond and recovery will increase along with increasing of test temperature.

Optoelectronic properties of hybrid diodes based on vanadyl- phthalocyanine and zinc oxide nanorods thin films

Herein, we report the optoelectronic properties of hybrid diodes fabricated using vanadyl phthalocyanine (VOPc) and zinc oxide nanorods (ZNR) with the configuration: ITO/ZNR/VOPc/MoO3/Al. Vertically aligned ZnO nanorods were grown using a simple aqueous solution (AS) method as a function of growth temperature. The correlation between the morphology of ZNR films and the optoelectronic properties of the ZNR/VOPc hybrid devices was investigated. The results show that the hybrid diodes with ZNR films grown at 120 °C offer the best optoelectronic properties. The higher photocurrent responsivity, Rph, (16.28 A/W) was achieved for devices with ZNR films grown at 120 °C. This value is 25 times higher than the Rph value obtained for the devices made with ZnO nanoparticle films that were reported earlier.

Development of organic/inorganic PANI/ZnO 1D nanostructured hybrid thin film solar cell by soft chemical route

Polyaniline (PANI)/zinc oxide (ZnO) nanorods hybrid solar cell device was fabricated via a two-step process. The first step involved soft chemical synthesis of ZnO nanorods thin film on the indium-doped tin oxide (ITO) substrate and subsequent annealing in air at 300 °C. The second step of involved chemisorption of PANI on the surface of the ZnO nanorods by Doctor Blade Method. The fabricated heterojunction films were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), fourier transform infrared (FT-IR), and Raman spectra. The results confirmed chemical interactions between PANI and ZnO and thus the formation of the heterojunction. Both the PANI coated pristine and annealed ZnO nanorods thin films were studied for their solar cell characteristics. The results of solar cell measurements showed that the overall light-conversion efficiency of PANI coated pristine ZnO thin film to be ~ 80% higher than for PANI coated annealed ZnO thin film. This is attributed to more effective charge separation and faster interfacial charge transferring occurred in the pristine ZnO thin films.

Nano-rods oxide materials for biosensor application.

Iron ions selective biosensor (Fe3+) based on zinc oxide nano-rods thin film symbolic as ZnO-(NRs)TF will be developed and prepared. The potentiometric response for ZnO-(NRs)TF deposited on conducting plastic and silicon substrates as working electrode versus reference electrode (Ag/AgCl) was found to be linear against logarithmic FeCl3 with concentration range between 10-6 M and 10-2 M. The ZnO-(NRs)TF will be grown on conducting plastic and silicon substrates using two methods (Sol - Gel and aqueous chemical growth (ACG)) by seed layers and nano-rod growth will be investigated. For fabricate an advanced extracellular iron biosensor, the ZnO-(NRs) on plastic and silicon substrates were coated with a thin layer of specific ionophore membrane to be used for iron concentration measurements in extracellular solution. The prepared sample crystallinity and microstructure will be characterized by x-ray diffraction (XRD) which, imply that ZnO-(NRs)TF sample crystallite sizes are in the nano-scale. The prepared samples morphology was characterized by Field emission scanning electron microscope (FESEM).

(Invited) Hydrothermal Growth of Zinc Oxide (ZnO) Nanorods and Structural and Optical Studies for Soil pH Measurement Applications

Zinc Oxide (ZnO) nanorods (NRs) are developed by a hydrothermal growing method using zinc acetate as the precursor material. The synthesized ZnO particle solution deposited on the Aluminum and Glass substrate by using a spin coating and thermal evaporation method. ZnO nanoparticle layer is treated for hydrothermal growing procedure and further annealing at high temperature to obtain uniform ZnO NRs. The structural and optical properties of the ZnO NRs are examined with field emission scanning electron microscopy with Energy Dispersive Spectrometer, X-ray diffraction meter and UV visible spectrometer. The crystal qualities, grain size, diameter, and optical bandgap of the ZnO NRs were affected by the type of solvent and substrates used. The developed ZnO NRs thin film structure has high potential application in soil pH measurement. Keywords: ZnO NRs; Spin Coating; Thermal Evaporation; FESEM/EDS; XRD; UV Visible spectrometer Figure 1

Graphene quantum dots enhance UV photoresponsivity and surface-related sensing speed of zinc oxide nanorod thin films

Thin films of almost vertically-grown zinc oxide nanorods (ZnO NR) were prepared via a solvothermal method, and graphene quantum dots (GQDs) were synthesized by pyrolyzing citric acid. Various amounts of GQDs were loaded onto ZnO NR thin films by applying a dip-coating process for different times. Field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), transmission electron microscopy (TEM), and X-ray diffractometry (XRD) were employed to characterize the structures. UV–visible spectra of the thin films showed no significant change in the bandgap (~3.3eV) after incorporating GQDs, which is appropriate for visible-blind UV sensing applications. Photoluminescence (PL) spectra showed a significant decrease in the PL intensity of the ZnO NR thin film after incorporating GQDs, suggesting that the generated electrons can be better separated from their hole counterparts and hence contribute to the generated photocurrent. Finally, UV sensing analysis was performed, indicating that GQDs can enhance both the UV-induced photocurrent and the sensing speed of ZnO NR thin films; however, the improvement in the surface-related UV sensing was higher than in the bulk-related one, which could be attributed to the numerous active sites and edge effects of GQDs. The enhanced photocurrent was discussed based on the band diagram.

Preparation and spectroscopic analysis of zinc oxide nanorod thin films of different thicknesses

AbstractZinc oxide thin films with different thicknesses were prepared on microscopic glass slides by sol-gel spin coating method, then hydrothermal process was applied to produce zinc oxide nanorod arrays. The nanorod thin films were characterized by various spectroscopic methods of analysis. From the images of field emission scanning electron microscope (FESEM), it was observed that for the film thickness up to 200 nm the formed nanorods with wurtzite hexagonal structure were uniformly distributed over the entire surface substrate. From X-ray diffraction analysis it was revealed that the thin films had good polycrystalline nature with highly preferred c-axis orientation along (0 0 2) plane. The optical characterization done by UV-Vis spectrometer showed that all the films had high transparency of 83 % to 96 % in the visible region and sharp cut off at ultraviolet region of electromagnetic spectrum. The band gap of the films decreased as their thickness increased. Energy dispersive X-ray spectroscopy (EDS) showed the presence of zinc and oxygen elements in the films and Fourier transform infrared spectroscopy (FT-IR) revealed the chemical composition of ZnO in the film.

Hydrothermal Growth of 1D ZnO Nanorods Thin Films for Hydrogen Gas Production through Water Splitting Reaction

Current study aims to control the growth of vertically aligned zinc oxide (ZnO) nanorods (NRs) arrays on indium tin oxide (ITO) substrate with tuneable diameter and length by using hydrothermal method. FESEM result shows that the diameter of NRs are tuneable from 95 nm to 107 nm and its length can be varied from 2.0 μm to 5.0 μm by prolonging the synthesis duration. According to FESEM images, extent the synthesis duration renders denser NRs occupancy. XRD result reveals that the NRs have prefer orientation along 002 direction, which is distinguishly different from relative peak intensity of standard ZnO. The NRs are employed as photocatalyst thin film to produce hydrogen gas (H2) via photocatalytic water splitting reaction.

Electrochemical growth of controlled tip shapes of ZnO nanorod arrays on silicon substrate and enhanced photoluminescence emission from nanopyramid arrays compared with flat-head nanorods

Zinc oxide (ZnO) nanorod arrays (NRAs) with different morphologies such as; perfect hexagon flat-head, pyramidal, compact pencil, nail-shaped, and high-compact ZnO nanorod thin films, were successfully grown on silicon substrates. These NRAs were formed on substrates using a simple low-temperature electrochemical method without adding any catalyst or template via the precursors of zinc nitrate hexahydrate [Zn(NO3)2·6H2O] and hexamethylenetetramine [HMT; C6H12N4] with an equal molar concentration of 0.025 mol/l. The morphologies of the ZnO nanorods (NRs) could be controlled and transformed successfully in to other morphologies by changing the growth conditions, such as; growth temperature and applied current density. Detailed structural investigations reveal that the synthesized various NRs are single crystalline with wurtzite hexagonal phase and preferentially grow along the c-axis direction. The room temperature photoluminescence spectra show that each spectrum consists of an ultraviolet (UV) band and a relative broad visible light emission and infrared emission peak. The enhanced light emission intensity at UV peak (∼375 nm) is observed significantly from ZnO nanopyramid (NP) arrays because of the conical shape of NP. The photoluminescence intensity of the UV peak from the NPs is found to be 1.5–17 times larger than those from the other various NRs.

A study of hydrothermally grown ZnO nanorod-based metal-semiconductor-metal UV detectors on glass substrates

This study reports hydrothermally grown zinc oxide nanorod-based metal-semiconductor-metal ultraviolet detectors with palladium metal as the electrodes. The zinc oxide nanorods were deposited on glass substrates in two steps, seed layer deposition and growth of nanorods. The structural and optical properties of nanorods were examined using scanning electron microscopy and ultraviolet–vis spectroscopy, respectively. The scanning electron microscopy image showed that the growth of nanorods was uniform, and the ultraviolet–vis results indicate that the bandgap of zinc oxide nanorods was 3.23 eV. For metal-semiconductor-metal devices, interdigited metal electrodes with equal interelectrode spacing and a width of 0.3 mm were deposited above the zinc oxide nanorod thin films with a shadow mask using a thermal evaporation system. The current–voltage characteristics of the metal-semiconductor-metal detector were investigated and it showed a contrast ratio of approximately 2.10 and responsivity of approximately 0.199 A/W at 1.8 V. These results are expected to be beneficial to fabricating cheap and practical ultraviolet detection applications.

Enhancement of SO2 gas sensing performance using ZnO nanorod thin films: the role of deposition time

In this study, a sensor with a controllable thin film of zinc oxide (ZnO) nanostructures with different deposition times is successfully synthesized over alumina substrates by chemical bath deposition methods. The seed of ZnO is grown using the dip-coating method, and ZnO thin film is grown by chemical bath deposition (CBD) using the precursor of Zn(NO3)2·4H2O. Chemical bath deposition was done three times to investigate the role of deposition time toward gas sensing properties. Structure, morphology, and composition of the ZnO thin films are characterized using X-ray diffraction, scanning electron microscopy, and energy dispersive spectroscopy, respectively. From the morphology characterization, the ZnO nanostructure from two-times CBD and three-times CBD process shows different sizes and densities of nanorods compared to the ZnO thin film from one-time CBD process. Increasing thickness of thin film is also observed in two-times CBD of ZnO. The gas sensor characterization test results show that the ZnO thin films from two-times CBD can improve the sensing response to be 93% for SO2 gas at 70 ppm of concentration at working temperature of 300 °C, which is an increase of 15% compared to ZnO thin films from one-time CBD. At different operation temperatures, the response of two-times CBD ZnO nanorod increases 20–40% over one-time CBD ZnO nanorod. The three-times CBD ZnO nanorod showed non-order and high-density nanostructure yielding low resistance value and cause low sensor response.

Synthesis of Zinc Oxide Thin Films by Modified Sol-Gel Route for Solar Water Splitting

Zinc oxide (ZnO) is one of the promising candidates for solar water splitting application. Due to immerging of nanotechnology, ZnO nanostructures have been extensively studied and the properties are still under debate. Vertically aligned ZnO nanorods (NRs) offer higher surface-to-volume ration compared to other shapes and become the most seeked by researches ever since. The facile growth of vertically aligned ZnO NRs thin films out of two different zinc salt, namely , zinc acetate and zinc nitrate using the modified sol-gel route were performed with the assistant of ultrasonic rinse. Sonication of ZnO NRs thin films has significant improvement on the structural and optical properties. Several sonication periods have been employed to synthesize these ZnO NRs thin films. Deposited ZnO NRs films were characterized under FE-SEM, AFM, XRD and UV-Vis. Comparative investigation performed on acetate and nitrate precursor materials showed a preferable (0 0 2) with homogeneous surface formation single crystal growth, high quality transparent thin film of 3.23 eV in acetate precursor material at 30 seconds sonication were reported in this paper.