Effect of pH on the morphology of ZnO nanostructures and its influence on structural and optical properties

Pristine ZnO nanostructure of rods, flakes and flowers are synthesized by hydrothermal method, using equimolar aqueous solutions of zinc-nitrate and hexamethylenetetramine at different pH. The influence of pH value on the formation of different morphological structures of ZnO is investigated. The st...

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Published inPhysica. B, Condensed matter Vol. 457; pp. 96 - 102
Main Authors Rayerfrancis, Arokiyadoss, Balaji Bhargav, P., Ahmed, Nafis, Chandra, Balaji, Dhara, Sandip
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.01.2015
Subjects
Annealing
Condensed matter
Field emission
Flakes
Hydrothermal method
Nanostructure
Nanstructures
Raman spectroscopy
Wurtzite
X-ray diffraction
Zinc oxide
ZnO
Zone boundary phonon
Zone boundary phonon
ZnO
Nanstructures
Hydrothermal method
Raman spectroscopy
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Summary:Pristine ZnO nanostructure of rods, flakes and flowers are synthesized by hydrothermal method, using equimolar aqueous solutions of zinc-nitrate and hexamethylenetetramine at different pH. The influence of pH value on the formation of different morphological structures of ZnO is investigated. The structural and morphological properties were investigated by X-ray diffraction (XRD) studies and field emission scanning electron microscopic (FESEM) analyses. The XRD results confirm that the crystallinity of ZnO nanostructures are improved after annealing with the wurtzite crystal structure. FTIR studies are carried out in order to ascertain the presence of various functional groups present in the material. Optical studies, using Raman and photoluminescence spectroscopy shows presence of novel defects with newly assigned zone boundary phonon mode.
Bibliography:ObjectType-Article-1
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content type line 23
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2014.09.044