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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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SEM images of ZnO NRs prepared with different solvents: (a) MeOH, (b) EtOH, (c) IPA, and (d) 2-ME.
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Figure 3: SEM images of ZnO NRs prepared with different solvents: (a) MeOH, (b) EtOH, (c) IPA, and (d) 2-ME.

Mentions: The top-view SEM images of the ZnO NRs that were synthesized with the use of different solvents are shown in Figure 3. All of the synthesized ZnO NRs showed a hexagonal-faceted morphology. The diameter of the obtained ZnO NRs was approximately 20 to 50 nm. The NRs covered the entire surface of the substrate, and most of these NRs grew into an unchain-like and branched structure. On the basis of the SEM images, the utilization of different solvents evidently resulted in different diameters of the synthesized ZnO NRs. The ZnO NRs that were synthesized using 2-ME provided the smallest diameter, whereas those synthesized with EtOH displayed the largest diameters. The size of the ZnO NRs in diameter is strongly dependent on the grain size of the ZnO seed layer [29]. As the grain size of the seed layer increases, larger sizes of ZnO NRs in diameter are produced.


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)

SEM images of ZnO NRs prepared with different solvents: (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 3: SEM images of ZnO NRs prepared with different solvents: (a) MeOH, (b) EtOH, (c) IPA, and (d) 2-ME.
Mentions: The top-view SEM images of the ZnO NRs that were synthesized with the use of different solvents are shown in Figure 3. All of the synthesized ZnO NRs showed a hexagonal-faceted morphology. The diameter of the obtained ZnO NRs was approximately 20 to 50 nm. The NRs covered the entire surface of the substrate, and most of these NRs grew into an unchain-like and branched structure. On the basis of the SEM images, the utilization of different solvents evidently resulted in different diameters of the synthesized ZnO NRs. The ZnO NRs that were synthesized using 2-ME provided the smallest diameter, whereas those synthesized with EtOH displayed the largest diameters. The size of the ZnO NRs in diameter is strongly dependent on the grain size of the ZnO seed layer [29]. As the grain size of the seed layer increases, larger sizes of ZnO NRs in diameter are produced.

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