Tuning the aspect ratio of hydrothermally grown ZnO by choice of precursor

Journal Article · Sat Jan 15 04:00:00 EST 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.10.024· OSTI ID:21504036

Rajeswari Yogamalar, N ^[1]

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1. Nanomaterials Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli-620 015 (India)

Variable aspect ratio (length/diameter), one dimensional ZnO nanostructures are synthesized by reacting Zn{sup 2+} precursor derived from Zn.Ac{sub 2}, Zn.Cl{sub 2} and Zn.(NO{sub 3}){sub 2} under hydrothermal treatment. The growth mechanism illustrating the formation of self-assembling from individual ZnO nanoparticles to rod-like form is explained briefly. XRD reveals that the ZnO obtained from various zinc salts are pure, wurtzite structure, with crystalline hexagonal phase. The qualitative analysis of ZnO formation and morphology of ZnO nanoparticles are estimated from FESEM and TEM micrographs. Strong UV absorption corresponding to the recombination of electron-hole pair is observed and the blue shift absorption obeys the size confinement effect. The extent of absorption relatively varies when the morphology is changed from nano-bundles to individual rod-like ZnO. When electrons are excited at wavelength of 240 nm, a strong near band edge (NBE) emission and surface defects emission are observed in the PL spectra. The broader emission situated in the blue-green region of the visible spectrum, originating from surface oxygen defects, is not observed in ZnO derived from Zn.Ac{sub 2}. -- Graphical abstract: The study investigates the effect of Zn{sup 2+} ions derived from various zinc sources (Zn.Ac{sub 2}, Zn.Cl{sub 2} and Zn.(NO{sub 3}){sub 2}) on the formation of one dimensional ZnO nanostructures with tunable aspect ratio. Display Omitted

• OSTI ID: 21504036
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 184; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ABSORPTION
ASPECT RATIO
CHALCOGENIDES
CHARGED PARTICLES
CHLORIDES
CHLORINE COMPOUNDS
COHERENT SCATTERING
DIFFRACTION
DIMENSIONLESS NUMBERS
ELECTRON MICROSCOPY
EMISSION
HALIDES
HALOGEN COMPOUNDS
IONS
MICROSCOPY
MORPHOLOGY
NANOSTRUCTURES
NITRATES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PRECURSOR
SCATTERING
SORPTION
SPECTRA
SURFACES
TRANSMISSION ELECTRON MICROSCOPY
VISIBLE SPECTRA
X-RAY DIFFRACTION
ZINC CHLORIDES
ZINC COMPOUNDS
ZINC HALIDES
ZINC IONS
ZINC NITRATES
ZINC OXIDES