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Sol-gel synthesized zinc oxide nanorods and their structural and optical investigation for optoelectronic application.

Foo KL, Hashim U, Muhammad K, Voon CH - Nanoscale Res Lett (2014)

Bottom Line: Nanostructured zinc oxide (ZnO) nanorods (NRs) with hexagonal wurtzite structures were synthesized using an easy and low-cost bottom-up hydrothermal growth technique.In addition, the calculated results from the specific models of the refractive index are consistent with the experimental data.The ZnO NRs that grew from the 2-methoxyethanol seeded layer exhibited the smallest grain size (39.18 nm), largest diffracted intensities on the (002) plane, and highest bandgap (3.21 eV).

View Article: PubMed Central - HTML - PubMed

Affiliation: Nano Biochip Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis (UniMAP), Kangar, Perlis 01000, Malaysia.

ABSTRACT
Nanostructured zinc oxide (ZnO) nanorods (NRs) with hexagonal wurtzite structures were synthesized using an easy and low-cost bottom-up hydrothermal growth technique. ZnO thin films were prepared with the use of four different solvents, namely, methanol, ethanol, isopropanol, and 2-methoxyethanol, and then used as seed layer templates for the subsequent growth of the ZnO NRs. The influences of the different solvents on the structural and optical properties were investigated through scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, and photoluminescence. The obtained X-ray diffraction patterns showed that the synthesized ZnO NRs were single crystals and exhibited a preferred orientation along the (002) plane. In addition, the calculated results from the specific models of the refractive index are consistent with the experimental data. The ZnO NRs that grew from the 2-methoxyethanol seeded layer exhibited the smallest grain size (39.18 nm), largest diffracted intensities on the (002) plane, and highest bandgap (3.21 eV).

No MeSH data available.


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X-ray diffraction patterns of ZnO NRs with hydrothermal growth process: (a) MeOH, (b) EtOH, (c) IPA, and (d) 2-ME.
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Figure 4: X-ray diffraction patterns of ZnO NRs with hydrothermal growth process: (a) MeOH, (b) EtOH, (c) IPA, and (d) 2-ME.

Mentions: The crystal structure and microstructure of the as-synthesized ZnO NRs were studied through XRD. Figure 4 shows the XRD patterns of the ZnO NRs that were synthesized on the silicon substrate with the aqueous solutions and different seeded layers. All of the diffraction peaks are consistent with the standard card Joint Committee on Powder Diffraction Standards (JCPDS) 36–1451. The peak intensities were measured in the range of 30° to 70° at 2θ. The result showed that the ZnO NRs that were prepared through the hydrothermal growth method presented a remarkably strong diffraction peak at the (002) plane, which is located between 34.5° and 34.6° [30,31]. This finding indicated that all of the ZnO samples possessed pure hexagonal wurtzite structures with high c-axis orientations.


Sol-gel synthesized zinc oxide nanorods and their structural and optical investigation for optoelectronic application.

Foo KL, Hashim U, Muhammad K, Voon CH - Nanoscale Res Lett (2014)

X-ray diffraction patterns of ZnO NRs with hydrothermal growth process: (a) MeOH, (b) EtOH, (c) IPA, and (d) 2-ME.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4150024&req=5

Figure 4: X-ray diffraction patterns of ZnO NRs with hydrothermal growth process: (a) MeOH, (b) EtOH, (c) IPA, and (d) 2-ME.
Mentions: The crystal structure and microstructure of the as-synthesized ZnO NRs were studied through XRD. Figure 4 shows the XRD patterns of the ZnO NRs that were synthesized on the silicon substrate with the aqueous solutions and different seeded layers. All of the diffraction peaks are consistent with the standard card Joint Committee on Powder Diffraction Standards (JCPDS) 36–1451. The peak intensities were measured in the range of 30° to 70° at 2θ. The result showed that the ZnO NRs that were prepared through the hydrothermal growth method presented a remarkably strong diffraction peak at the (002) plane, which is located between 34.5° and 34.6° [30,31]. This finding indicated that all of the ZnO samples possessed pure hexagonal wurtzite structures with high c-axis orientations.

Bottom Line: Nanostructured zinc oxide (ZnO) nanorods (NRs) with hexagonal wurtzite structures were synthesized using an easy and low-cost bottom-up hydrothermal growth technique.In addition, the calculated results from the specific models of the refractive index are consistent with the experimental data.The ZnO NRs that grew from the 2-methoxyethanol seeded layer exhibited the smallest grain size (39.18 nm), largest diffracted intensities on the (002) plane, and highest bandgap (3.21 eV).

View Article: PubMed Central - HTML - PubMed

Affiliation: Nano Biochip Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis (UniMAP), Kangar, Perlis 01000, Malaysia.

ABSTRACT
Nanostructured zinc oxide (ZnO) nanorods (NRs) with hexagonal wurtzite structures were synthesized using an easy and low-cost bottom-up hydrothermal growth technique. ZnO thin films were prepared with the use of four different solvents, namely, methanol, ethanol, isopropanol, and 2-methoxyethanol, and then used as seed layer templates for the subsequent growth of the ZnO NRs. The influences of the different solvents on the structural and optical properties were investigated through scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, and photoluminescence. The obtained X-ray diffraction patterns showed that the synthesized ZnO NRs were single crystals and exhibited a preferred orientation along the (002) plane. In addition, the calculated results from the specific models of the refractive index are consistent with the experimental data. The ZnO NRs that grew from the 2-methoxyethanol seeded layer exhibited the smallest grain size (39.18 nm), largest diffracted intensities on the (002) plane, and highest bandgap (3.21 eV).

No MeSH data available.


Related in: MedlinePlus