Effects of Substrate Type on the Morphology and Optical Properties of ZnO Nanorods Grown via Chemical Bath Deposition

In this study, zinc oxide nanorods (ZnO NRs) were prepared through chemical bath deposition using glass and fluorine-doped tin oxide (FTO) substrates, and their crystalline structure was investigated through X-ray diffraction. Results showed that the prepared ZnO NRs had wurtzite structure and grew along the [002] orientation, and ZnO NRs grown on the FTO substrate was more crystalline than those grown on the glass substrate. Field-emission scanning electron microscopy images showed that the glass sample had rod-like morphology and uniform distribution with 95 nm diameter and average length of approximately 980 nm, whereas the FTO-coated glass had 110 nm diameter and average length of approximately 1000 nm. The direct transition optica1 band gaps of the glass and FTO-coated glass samples were 3.28 and 3.97 eV, respectively.

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Optical and structural properties of synthesized ZnO nanorods through chemical bath deposition on various substrates

Iraqi Journal of Physics (IJP) ◽

10.30723/ijp.v18i45.536 ◽

2020 ◽

Vol 18 (45) ◽

pp. 40-48

Author(s):

Hanaa Flayeh AL Taay ◽

Yasimine Taha Mohammed ◽

Hind Fadhil Oleiwi

Keyword(s):

Optical Properties ◽

Chemical Bath Deposition ◽

Glass Sample ◽

Large Scale ◽

Optical Transition ◽

Average Length ◽

Zno Nanorods ◽

X Ray Diffraction ◽

Direct Optical Transition ◽

Microscopy Images

Chemical bath deposition was used to synthesize ZnO nanorods (NRs) on glass and fluorine_doped tin oxide (FTO) substrates. X-ray diffraction was performed to examine the crystallinity of ZnO nanorod. Results showed that ZnO NRs had a wurtzite crystal structure. Field emission scanning electron microscopy images showed that glass sample had rod-like structure distribution with (50 nm) diameter and average length of approximately (700 nm), whereas the FTO-coated glass sample had 25 nm diameter and average length of approximately 950 nm. The direct optical transition band gaps of the glass and FTO_coated glass samples were( 4 and 4.43 eV), respectively. The structural and optical properties of the synthesized ZnO products were described. The grown ZnO NRs have good optical properties. The proposed method is simple, inexpensive, soft, and environmentally friendly compared with other methods, making it appropriate for the large-scale manufacturing of devices and other app1ications.

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Fabrication and Material Analysis of Zinc Oxide Nanorods Grown on Gallium Nitride Substrate

Journal of New Materials for Electrochemical Systems ◽

10.14447/jnmes.v19i4.285 ◽

2016 ◽

Vol 19 (4) ◽

pp. 181-183 ◽

Cited By ~ 2

Author(s):

Tzu-Yi Yu ◽

Yi Cian Chen ◽

Wang Ting Chiu ◽

Yang Luo ◽

Sheng Shin Wang ◽

...

Keyword(s):

Au Nanoparticles ◽

Zno Nanorods ◽

Nano Particles ◽

Zinc Oxide Nanorods ◽

X Ray Diffraction ◽

Thermal Methods ◽

X Ray ◽

Oxide Nanorods ◽

Different Temperatures ◽

Multiple Material

In this study, we address process how the ZnO nanorods were deposited on GaN substrates with spin-coating by using the hydro-thermal methods. After ZnO was spin coated, the samples were annealed with different temperatures to incorporate with Au nano particles. Multiple material analyses, such as the field emission scanning electron microscopy (FESEM), the energy dispersive X-ray spectroscopy (EDX) and the X-ray diffraction (XRD) analyses were carried out to characterize the Au nanoparticles/ZnO nanorods/GaN nanocomposites.

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pH study of zinc oxide nanorods grown on indium tin oxide coated substrate,

Canadian Journal of Physics ◽

10.1139/cjp-2013-0616 ◽

2014 ◽

Vol 92 (7/8) ◽

pp. 838-841 ◽

Cited By ~ 5

Author(s):

Kevin Farmer ◽

Parameswar Hari ◽

Kenneth Roberts

Keyword(s):

Zinc Oxide ◽

Chemical Bath Deposition ◽

Tin Oxide ◽

Indium Tin Oxide ◽

Electronic Device ◽

Ph Dependence ◽

Zno Nanorods ◽

Zinc Oxide Nanorods ◽

Visible Range ◽

Oxide Nanorods

Controlled growth of ZnO nanorods on various substrates is of great interest in photonic and electronic device applications. Also of interest is increasing the optical activity of zinc oxide nanorods in the visible spectrum. In this study, we report pH dependence for the morphology and photoluminescence of aligned ZnO nanorods grown on an indium tin oxide (ITO) coated glass substrate deposited by a wet chemical bath deposition method. The ZnO nanorods were grown by a chemical bath deposition technique using equimolar ratios of zinc (II) nitrate and hexamethylenetetramine in solution at 95 °C. The pH of the reaction solution prior to oven heating was varied from pH 5 to 10.6. Surface properties of the ZnO nanorods on ITO substrates were studied using scanning electron microscopy and photoluminescence spectroscopy. We also compared the use of NaOH to adjust the pH with the use of NH4OH, the latter necessary at higher pH due to the relative insolubility of zinc. It was found that the size of the nanorods can vary twofold with pH and the choice of base. Uniformity of coverage is also significantly dependent upon these variables and will be discussed as it relates to solubility and crystal growth. It was also found that the intensity of the photoluminescence in the visible range is pH dependent. For example, the intensity of luminescence at 550 nm for ZnO nanorods grown at pH 7 using NH4OH is 532% of the corresponding emission for a sample prepared at pH 5.

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Structural and Optical Properties of ZnO Nanorods Thin Films Prepared Using Hydrothermal Technique and Effect of growth time

Journal of Kufa Physics ◽

10.31257/2018/jkp/2020/120208 ◽

2020 ◽

Vol 12 (02) ◽

pp. 76-88

Author(s):

Ahmed S. Abed ◽

◽

Sattar J. Qasim ◽

Abbas F. Abbas ◽

Keyword(s):

Optical Properties ◽

Zno Nanorods ◽

Band Gap Energy ◽

Zinc Oxide Nanorods ◽

Morphological Properties ◽

Growth Time ◽

X Ray Diffraction ◽

Hydrothermal Technique ◽

X Ray ◽

Oxide Nanorods

This paper describes, Synthesis of zinc oxide nanorods (ZnO NRs) using hydrothermal technique at different growth time. The structural and morphological properties were characterized by X-ray diffraction (XRD), Energy Dispersive X-Ray (EDX) and Field Emission Scanning Electron Microscope (FE-SEM). The ZnO NRs were obvious hexangular wurtzite structure and preferentially oriented along the c-axis (002) and growth vertically to the substrates. The optical properties were studied. From UV-Visible spectrophotometer and Photoluminescence (PL), the optical band gap energy of all ZnO NRs samples (S1, S2 and S3) were calculated to be (3.425 eV, 3.4 eV, 3.425 eV) respectively. Also, the effect of growth time on ZnO nanorods was studied.

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Growth of Multidimensional Zinc Oxide Nanorods Array for Enhanced UV Photoresponsivity

10.21203/rs.3.rs-332687/v1 ◽

2021 ◽

Author(s):

Ashish Yengantiwar ◽

Arun G Banpurkar

Keyword(s):

Zno Nanorods ◽

Nanorod Array ◽

Zinc Oxide Nanorods ◽

X Ray Diffraction ◽

Solution Deposition ◽

Copper Electrodes ◽

Nanorods Array ◽

Current Voltage ◽

Oxide Nanorods ◽

Diffraction Patterns

Abstract Ultraviolet (UV) photosensitive device was fabricated using ZnO nanorod array on substrate with copper electrodes. Facile open aqueous solution deposition technique was used to grow the ZnO nanorods forming an electrical bridge between copper electrodes. Powder X-ray diffraction patterns was used to confirm the polycrystalline wurtzite ZnO phase and scanning electron microscopy (SEM) techniques was employed to characterize the growth morphology of ZnO nanorods. A current-voltage (I-V) characterization in the dark exhibits the back-to-back diode characteristics. In the presence of ultraviolet (UV) radiation, enhanced photo-response was reported wherein photocurrent increases by two orders of magnitude at 2 V bias. This enhancement is mainly due to lateral interfacial contacts between neighboring grain-boundary of the nanorods arrays.

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Influence of Solution Temperature for Hydrothermally Grown Zinc Oxide Nanorods

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.925.385 ◽

2014 ◽

Vol 925 ◽

pp. 385-389

Author(s):

Kalyani Nadarajah ◽

Yern Chee Ching

Keyword(s):

Zno Nanorods ◽

Growth Direction ◽

Emission Peak ◽

Zinc Oxide Nanorods ◽

Solution Temperature ◽

X Ray Diffraction ◽

X Ray ◽

Aligned Arrays ◽

Uv Emission ◽

Oxide Nanorods

Well-aligned arrays of vertically oriented ZnO nanorods were synthesized using hydrothermal method using equal molar concentration of zinc acetate hexahydrate (Zn (CH3COO)2.6H2O) and hexamethylenetetramine (C6H12N4) at various deposition temperatures. The resulting nanorods were analyzed by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), photoluminescence (PL), and UV-vis spectrophotometer. XRD and FESEM results indicate that the crystallinity improved for nanorods grown at 85 °C. The preferred growth direction of these nanorods is in (002) direction. However, the nanorods were grown at 55 °C shows poor crystalline characteristics. Typically, these nanorods have grown up to 1000 nm with the diameter range of 25-50 nm. The obtained ZnO nanorods exhibit a weaker UV emission peak located around ~380-390 nm and a relatively stronger yellow-red emission band located at 625 nm to 675 nm.

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Two-Photon Excited Ultraviolet Photoluminescence of Zinc Oxide Nanorods

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2008.263 ◽

2008 ◽

Vol 8 (11) ◽

pp. 5854-5857 ◽

Cited By ~ 11

Author(s):

Guangping Zhu ◽

Chunxiang Xu ◽

Jing Zhu ◽

Changgui Lu ◽

Yiping Cui ◽

...

Keyword(s):

Zinc Oxide ◽

Emission Band ◽

Single Photon ◽

Zno Nanorods ◽

Zinc Oxide Nanorods ◽

Excitation Wavelength ◽

Photoluminescence Intensity ◽

Vapor Phase Transport ◽

Two Photon ◽

Oxide Nanorods

High density zinc oxide nanorods with uniform size were synthesized on (100) silicon substrate by vapor-phase transport method. The scanning electron microscopy images reveal that the nanorods have an average diameter of about 400 nm. The X-ray diffraction pattern demonstrates the wurtzite crystalline structure of the ZnO nanorods growing along [0001] direction. The single-photon excited photoluminescence presents a strong ultraviolet emission band at 394 nm and a weak visible emission band at 600 nm. When the ZnO nanorods were respectively pumped by various wavelength lasers from 520 nm to 700 nm, two-photon excited ultraviolet photoluminescence was observed. The dependence of the two-photon excited photoluminescence intensity on the excitation wavelength and power was investigated in detail.

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EFFECT OF PRE-HEATING AND SEED LAYER ON HYDROTHERMAL GROWTH AND OPTICAL PROPERTIES OF ZINC OXIDE NANORODS

International Journal of Nanoscience ◽

10.1142/s0219581x11009283 ◽

2011 ◽

Vol 10 (04n05) ◽

pp. 845-849

Author(s):

GAURAV SHUKLA ◽

ALIKA KHARE

Keyword(s):

Optical Properties ◽

Seed Layer ◽

Zno Nanorods ◽

Pulsed Laser ◽

Heating Time ◽

Hydrothermal Growth ◽

Zinc Oxide Nanorods ◽

Growth Time ◽

Oxide Nanorods ◽

Reported Effect

Hydrothermal growth of highly c-axis oriented ZnO nanorods with high aspect ratio on pulsed laser deposited ZnO seed layer is reported. Effect of pre-heating time, growth time and seed layer on the structural, morphological and optical properties of ZnO nanorods is presented. The possible growth mechanism for ZnO nanorods is also discussed.

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Effect of Annealing Temperature of Magnesium Doped Zinc Oxide Nanorods Growth on Silicon Substrate

Journal of Nano Research ◽

10.4028/www.scientific.net/jnanor.26.33 ◽

2013 ◽

Vol 26 ◽

pp. 33-38 ◽

Cited By ~ 7

Author(s):

Ruziana Mohamed ◽

Zuraida Khusaimi ◽

A.N. Afaah ◽

Aadila Aziz ◽

Mohamad Hafiz Mamat ◽

...

Keyword(s):

Silicon Substrate ◽

Annealing Temperature ◽

Zno Nanorods ◽

Zinc Oxide Nanorods ◽

Immersion Method ◽

Xrd Diffraction ◽

Zinc Oxides ◽

Good Crystallinity ◽

Oxide Nanorods ◽

Mg Doped

Magnesium (Mg)-doped zinc oxides (ZnO) have been prepared on a silicon substrate by using the solution-immersion method. The nanorods films were annealed at different temperature 0°C, 250°C, 500°C respectively for 1 hour. The XRD diffraction indicated that the Mg-doped ZnO nanorods have good crystallinity with a hexagonal wurzite structure preferentially oriented along the (002) direction. PL spectroscopy at room temperature shows strong UV peaks appearing at 383 nm when annealed at 250°C. The intensity of broad emission peaks increases with increasing annealing temperature to 500°C which is possibility attributed to intrinsic defects.

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