optical, electrical, and physicochemical properties using remarkable applications.
These zinc oxide nanostructures have been developed by a variety of physical and
chemical techniques; however, the chemical techniques offer better control of the
particle size and morphology. The most approved synthesized methods include
thermal evaporation of zinc oxide powders at 1400
C, hydrothermal synthesis,
sol-gel technique, simple thermal sublimation, self-combustion, polymerized complex method, vapor-liquid-solid technique, double-jet precipitation, and solution
synthesis. The solution processes are used by few researchers to yield selective
zinc oxide nanostructures. Normally, the antibacterial tests are done in aqueous
media or cell culture media. Zinc oxide is known as nearly insoluble in water, and
it agglomerates immediately with water during synthesis due to the high polarity of
water leading to deposition. The matters of accumulation, re-precipitation, settling,
or non-dissolution are delaying the synthesis processes.
The zinc oxide nanoparticles are prepared from the aqueous solution of zinc
sulfate and sodium hydroxide in the ratio of 1:2. Initially, the synthesized zinc oxide
nanoparticles are identified by UV–Visible spectroscopy. The synthesized zinc
oxide nanoparticles are observed by UV–Visible absorption spectrophotometer as
shown in Fig. 3. The spectrum shows a peak at 210 nm formed due to the conversion
of bulk zinc oxide particles to nanozinc oxide particles. The bulk zinc oxide particles
lies the bandgap wavelength of 388 nm while the nanozinc oxide particles bandgap
wavelength at 210 nm due to the interband transition of copper electron from deep
level of the valence band [51]. The particle size analyzer also confirms that the
synthesized zinc oxide nanoparticles are in nanosize at about approximately 296 nm
as seen in Table 2. The average size of the synthesized zinc oxide nanoparticles are
further confirmed by SEM analysis (Fig. 4). The surface morphology of the
Fig. 3 UV Spectrum of
synthesized zinc oxide
nanoparticles (a) 3%
dilution (b) 1% dilution
234
E. Thangaraju and R. Muthuraj
These zinc oxide nanostructures have been developed by a variety of physical and
chemical techniques; however, the chemical techniques offer better control of the
particle size and morphology. The most approved synthesized methods include
thermal evaporation of zinc oxide powders at 1400
C, hydrothermal synthesis,
sol-gel technique, simple thermal sublimation, self-combustion, polymerized complex method, vapor-liquid-solid technique, double-jet precipitation, and solution
synthesis. The solution processes are used by few researchers to yield selective
zinc oxide nanostructures. Normally, the antibacterial tests are done in aqueous
media or cell culture media. Zinc oxide is known as nearly insoluble in water, and
it agglomerates immediately with water during synthesis due to the high polarity of
water leading to deposition. The matters of accumulation, re-precipitation, settling,
or non-dissolution are delaying the synthesis processes.
The zinc oxide nanoparticles are prepared from the aqueous solution of zinc
sulfate and sodium hydroxide in the ratio of 1:2. Initially, the synthesized zinc oxide
nanoparticles are identified by UV–Visible spectroscopy. The synthesized zinc
oxide nanoparticles are observed by UV–Visible absorption spectrophotometer as
shown in Fig. 3. The spectrum shows a peak at 210 nm formed due to the conversion
of bulk zinc oxide particles to nanozinc oxide particles. The bulk zinc oxide particles
lies the bandgap wavelength of 388 nm while the nanozinc oxide particles bandgap
wavelength at 210 nm due to the interband transition of copper electron from deep
level of the valence band [51]. The particle size analyzer also confirms that the
synthesized zinc oxide nanoparticles are in nanosize at about approximately 296 nm
as seen in Table 2. The average size of the synthesized zinc oxide nanoparticles are
further confirmed by SEM analysis (Fig. 4). The surface morphology of the
Fig. 3 UV Spectrum of
synthesized zinc oxide
nanoparticles (a) 3%
dilution (b) 1% dilution
234
E. Thangaraju and R. Muthuraj