Temperature Dependant Structural and Electrical Properties of ZnO Nanowire Networks

Al-Heniti, S.; Badran, R. I.; Umar, Ahmad; Al-Ghamdi, Ahmed A.; Kim, S H; Al-Marzouki, F.; Al‐Hajry, A.; Al-Sayari, S.A.; Alharbi, Talal

doi:10.1166/jnn.2012.5117

Cited by 8 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…ZnO nanofiber networks (NFNs) have been of interest in recent years due to their potential in future technological applications [1][2][3][4][5][6][7] . ZnO is a n-type semiconductor with a direct wide band gap of 3.37 eV (UV), large exciton binding energy (60 meV), high superficial reactivity and high Curie temperature (with magnetic doping).…”

Section: Introductionmentioning

confidence: 99%

Electrical, photoelectrical and morphological properties of ZnO nanofiber networks grown on SiO2 and on Si nanowires

et al. 2013

View full text Add to dashboard Cite

ZnO nanofibre networks (NFNs) were grown by vapour transport method on Si-based substrates. One type of substrate was SiO 2 thermally grown on Si and another consisted of a Si wafer onto which Si nanowires (NWs) had been grown having Au nanoparticles catalysts. The ZnO-NFN morphology was observed by scanning electron microscopy on samples grown at 600 °C and 720 °C substrate temperature, while an focused ion beam was used to study the ZnO NFN/Si NWs/Si and ZnO NFN/SiO 2 interfaces. Photoluminescence, electrical conductance and photoconductance of ZnO-NFN was studied for the sample grown on SiO 2 . The photoluminescence spectra show strong peaks due to exciton recombination and lattice defects. The ZnO-NFN presents quasi-persistent photoconductivity effects and ohmic I-V characteristics which become nonlinear and hysteretic as the applied voltage is increased. The electrical conductance as a function of temperature can be described by a modified three dimensional variable hopping model with nanometer-ranged typical hopping distances.

show abstract

Section: Introductionmentioning

confidence: 99%

Electrical, photoelectrical and morphological properties of ZnO nanofiber networks grown on SiO2 and on Si nanowires

et al. 2013

View full text Add to dashboard Cite

show abstract

“…13b and c) is not large; these results are also in agreement with TEM data, where there is formation of spherical nanoparticles. Al-Heniti et al 50 fabricated n-ZnO nanowires on p-Si substrate. They have studied the I-V characteristics of the fabricated nanowires in the temperature range from 77-477 K in the forward and reverse bias conditions.…”

Section: I-v Measurementsmentioning

confidence: 99%

Understanding the adsorption behavior of surface active molecules on ZnO nanostructures by experimental and first-principles calculations

Singh

et al. 2015

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

Zinc oxide (ZnO) nanostructures with different morphologies are prepared in the presence of surface active molecules such as sodium dodecyl sulphate (SDS), Tween 80 and Triton X-100 by a chemical method. The experimental and first principles methods are employed to understand the microscopic origin of the asymmetric growth mechanism of ZnO in the presence of various surface active molecules. Effect of increase in the amount of surface active molecules and temperature is studied on the growth morphology of ZnO. An innovative method is developed to synthesize ZnO nanowires (NWs) in the presence of SDS. Spherical nanoparticles (NPs) to spherical clusters are obtained in the presence of Triton X-100 and Tween 80. These results are then supported by first principles calculations. The adsorption of the -OH functional group on both polar and nonpolar surfaces of ZnO is modelled by using density functional theory (DFT). The calculated binding energy (BE) is almost equivalent on both the surfaces with no preference on any particular surface. The calculated value of BE shows that the -OH group is physio-adsorbed on both the surfaces. This results in the spherical morphology of nanoparticles prepared in the presence of Tween 80. Bader charge analysis shows that the charge transfer mainly takes place on top two layers of the ZnO(101[combining macron]0) surface. The absence of high values of electron localization function (ELF) reflects the lack of covalent bonding between the -OH group and the ZnO(101[combining macron]0) surface.

show abstract

“…The average particle size increases with increase in synthesized temperature. Also, increasing temperature lowers the band gap values [12,13]. Several fabrication techniques such as hydrothermal processing, sol-gel method, thermal hydrolysis techniques, vapor condensation method, laser ablation, spray pyrolysis are used to produce ZnO NPs [14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ZnO Nanoparticles by Chemical Method and its Structural and Optical Characterization

et al. 2022

View full text Add to dashboard Cite

In this report, ZnO nanoparticles (NPs) was synthesized by chemical method using Zinc Acetate dehydrate [Zn(CH3COO)2.2H2O)] as precursors and Ethanol and distilled water as solvent. Sodium hydroxide (NaOH) was used to maintain the pH and helps to establish the NPs. The NPs are characterized by XRD, UV-visible spectroscopy and SEM image analysis. The XRD characterization gives the polycrystalline nature of ZnO NPs with the size ~23 nm and ~27 nm calculated by Scherrer’s method and Williamson–Hall method respectively. The crystalline size of these NPs calculated using XRD pattern is validated by SEM image analysis. Using the UV-Visible spectrophotometer and Tauc plot method, the optical band gap of ZnO is found to be 3.35 eV. The uniform size distribution of NPs shown in SEM image and strong UV absorption shown in UV-Visible spectra indicate that thus prepared NPs are highly desirable for photo-catalytic activity and detection applications. BIBECHANA 19 (2022) 90-96

show abstract

Temperature Dependant Structural and Electrical Properties of ZnO Nanowire Networks

Cited by 8 publications

References 6 publications

Electrical, photoelectrical and morphological properties of ZnO nanofiber networks grown on SiO2 and on Si nanowires

Electrical, photoelectrical and morphological properties of ZnO nanofiber networks grown on SiO2 and on Si nanowires

Understanding the adsorption behavior of surface active molecules on ZnO nanostructures by experimental and first-principles calculations

Synthesis of ZnO Nanoparticles by Chemical Method and its Structural and Optical Characterization

Contact Info

Product

Resources

About