Hydrothermal Growth of Zinc Oxide (ZnO) Nanorods (NRs) on Screen Printed IDEs for pH Measurement Application

Morphology of Zinc Oxide (ZnO) is an important parameter to enhance the efficiency of optoelectronic devices. Morphology also plays a significant role in gas sensing properties of ZnO. In this research work, different morphologies of Zinc Oxide including nanorods, disks and flakes were obtained using Zinc Acetate, Sodium Dodecyl Sulphate and Trisodium Citrate as additives to a parent solution of Zinc nitrate hexahydrate (Zn(NO3)2·6H2O) and Hexamethylenetetramine (HMTA, (CH2)6N4) for hydrothermal growth. Use of Zinc Acetate as an additive has been rarely reported. This work presents the ability of Zinc Acetate to transform the morphology of ZnO nanorods to nanoneedles. Furthermore, in this study addition of Sodium Dodecyl Sulphate and Trisodium Citrate to the parent solution has shown potential for growing continuous granular films by the low cost and low temperature hydrothermal technique. Variation in crystallite size and band gap values with increasing concentration of Zinc Acetate, Sodium Dodecyl Sulphate and Trisodium Sulphate has been studied. Films with crystallite sizes of 7.48 nm and 6.77 nm were achieved with 5 mM Sodium Dodecyl Sulphate and 5 mM Trisodium Citrate respectively. The band gap of films produced with 5 mM Sodium Dodecyl Sulphate and with 5 mM Trisodium Citrate were 3.43 eV and 3.45 eV respectively. Therefore hydrothermal growth with Sodium Dodecyl Sulphate or Trisodium Citrate is a potential technique for obtaining granular ZnO films.

Download Full-text

Influence of Ammonia Solution on Zinc Oxide Nanostructures by Hydrothermal Growth

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.875-877.1549 ◽

2014 ◽

Vol 875-877 ◽

pp. 1549-1553 ◽

Cited By ~ 1

Author(s):

Z.B. Huang ◽

X.P. Zou ◽

G.Q. Yang ◽

X.M. Lv ◽

C.L. Wei ◽

...

Keyword(s):

Zinc Oxide ◽

Tin Oxide ◽

Indium Tin Oxide ◽

Zno Nanorods ◽

Precursor Solution ◽

Ammonia Solution ◽

Zinc Nitrate ◽

Hydrothermal Growth ◽

Zinc Oxide Nanostructures ◽

Oxide Nanostructures

In previous work, ZnO nanorods and nanoflowers were synthesized on indium-tin-oxide (ITO) substrates by hydrothermal growth at low temperature ,using the different concentrations of equimolar (1:1) zinc nitrate Zn (NO3)26H2O and methenamine (C6H12N4) mixed as precursors solution, and adding ammonia solution to control the pH levels. In this paper, for comparison, the same experiment without ammonia solution was also discussed. SEM, XRD were utilized to characterize morphologies and crystal structures of ZnO. It was indicated that the pH of precursor solution leads to the significantly changes in the nanostructured ZnO. Besides, a hierarchical structure of some of the micro/nanotubes was obtained .The possible growth mechanism is discussed in this work.

Download Full-text

Fabrication and characterization of a highly sensitive hydroquinone chemical sensor based on iron-doped ZnO nanorods

Dalton Transactions ◽

10.1039/c5dt03364k ◽

2015 ◽

Vol 44 (48) ◽

pp. 21081-21087 ◽

Cited By ~ 24

Author(s):

Ahmad Umar ◽

Ali Al-Hajry ◽

Rafiq Ahmad ◽

S. G. Ansari ◽

Mohammed Sultan Al-Assiri ◽

...

Keyword(s):

Zinc Oxide ◽

Chemical Sensor ◽

Zno Nanorods ◽

Screen Printed Electrode ◽

Highly Sensitive ◽

Iron Doped ◽

Doped Zno ◽

Fabrication And Characterization ◽

Screen Printed

Herein, we report the development of a simple and highly sensitive hydroquinone (HQ) chemical sensor based on an electrochemically activated iron-doped zinc oxide nanorod modified screen-printed electrode.

Download Full-text

Photo-initiated growth of zinc oxide (ZnO) nanorods

Materials Letters ◽

10.1016/j.matlet.2008.05.066 ◽

2008 ◽

Vol 62 (24) ◽

pp. 4044-4046 ◽

Cited By ~ 6

Author(s):

E.T.Y. Lee ◽

Y. Shimotsuma ◽

M. Sakakura ◽

M. Nishi ◽

K. Miura ◽

...

Keyword(s):

Zinc Oxide ◽

Zno Nanorods

Download Full-text

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.

Download Full-text

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.

Download Full-text

Butane/Propane Gas Sensing Using Zinc Oxide Film Grown by Successive Ionic Layer Adhesion and Reaction

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.705.273 ◽

2016 ◽

Vol 705 ◽

pp. 273-277 ◽

Cited By ~ 1

Author(s):

Emmanuel A. Florido ◽

Sarah Allyssa Solidum

Keyword(s):

Zinc Oxide ◽

Oxide Film ◽

Response Time ◽

Recovery Time ◽

Zno Nanorods ◽

Hot Water ◽

Zinc Oxide Film ◽

Zno Film ◽

Voltage Output ◽

Ionic Layer

This study was aimed to test the ability of zinc oxide (ZnO) film fabricated by successive ionic layer adsorption and reaction (SILAR) to detect liquid petroleum gas consisting of a mixture of butane/propane gas. The film was fabricated by alternate dipping of pre-cleaned glass substrates in a sodium zincate bath and in a 95°C hot water bath using an automated dipping machine to control the sequence and dipping time. Scanning electron microscopy (SEM) revealed a uniform film consisting of wurtzite ZnO nanorods for the sample grown using 0.1M concentration of sodium zincate and 200 dippings. Current-voltage characterization of the samples showed an average resistivity of 1.343 Ω-m. EDS analysis of the film confirmed the existence of zinc oxide with 65.9% zinc and 34.1% oxygen. The ZnO film exhibited an ability to detect the gas with an average gas response of 0.44, average response time of 14 seconds and average recovery time of 25 seconds using a gas concentration in air of 1.5 % by volume. Response time is the time for the sensor to reach the peak voltage output from the start of gas exposure while recovery time is the time for the voltage output to return to the initial value without gas when the gas is removed from the chamber. The zinc oxide film also showed a voltage output of 100, 109.31, 118.92, 123.61, 133.5, and 149.52 mV when exposed to percent volume gas concentrations of 0, 0.5, 0.75, 1.0, 1.25, and 1.5, respectively with a correlation coefficient of 0.97. The sensor sensitivity is 32 Δ(mV)/Δ(%conc).

Download Full-text

Morphological Study of Zinc-Oxide Nanorods Grown by Hot Water Treatment Suitable for Solar Cells Conversion Efficiency Enhancement

10.20944/preprints202005.0344.v1 ◽

2020 ◽

Author(s):

Mohammad Khairul Basher ◽

S. M. Shah Riyadh ◽

Md. Khalid Hossain ◽

Mahmudul Hassan ◽

Md. Abdur Rafiq Akand ◽

...

Keyword(s):

Zinc Oxide ◽

Solar Cells ◽

Water Treatment ◽

Conversion Efficiency ◽

Zno Nanorods ◽

Hot Water ◽

Zinc Oxide Nanorods ◽

Hot Water Treatment ◽

Time Duration ◽

Zinc Surface

Zinc-oxide (ZnO) nanostructures including nanorods are currently considered as a pioneer research of interest world-wide due to their excellent application potentials in various applied fields especially for the improvement of energy harvesting photovoltaic solar cells (PSC). We report on the growth and morphological properties of zinc-oxide (ZnO) nanorods grown on the surface of plain zinc (non-etched and chemically etched) plates by using a simple, economical, and environment-friendly technique. We apply hot water treatment (HWT) technique to grow the ZnO nanorods and varies the process parameters, such as temperature and the process time duration. The morphological, and elemental analysis confirm the agglomeration of multiple ZnO nanorods with its proper stoichiometry. The obtained nanostructures for different temperatures with different time duration showed the variation in uniformity, density, thickness and nanonorods size. The ZnO nanorods produced on the etched zinc surface were found thicker and uniform as compared to those grown on the non-etched zinc surface. This chemically etched Zinc plates preparation can be an easy solution to grow ZnO nanorods with high density and uniformity suitable for PSC applications such as to enhance the energy conversion efficiency of the photovoltaic (PV) solar cells towards the future sustainable green earth.

Download Full-text