The effect of pH was investigated at three different conditions including
acidic, neutral and basic forms. Fig. 5 shows the UV–vis spectra
of silver nanoparticles at pH = 3.0, 5.0, 7.0 and 9.0, respectively. The
result shows that the synthesis of silver nanoparticles completed at a
neutral condition and with an increase in pH can not showany upheaval
in UV–vis spectra for silver nanoparticles. On the other hand, in the
acidic condition we cannot observe any absorbance band for silver
nanoparticles. The aggregation of silver nanoparticles to form larger
nanoparticles was believed to be favored over the nucleation. In
addition, the Fig. 3 inset shows the changing silver nanoparticle color
at a different temperature that confirms UV–vis spectra in Fig. 5.
The effect of pH was investigated at three different conditions includingacidic, neutral and basic forms. Fig. 5 shows the UV–vis spectraof silver nanoparticles at pH = 3.0, 5.0, 7.0 and 9.0, respectively. Theresult shows that the synthesis of silver nanoparticles completed at aneutral condition and with an increase in pH can not showany upheavalin UV–vis spectra for silver nanoparticles. On the other hand, in theacidic condition we cannot observe any absorbance band for silvernanoparticles. The aggregation of silver nanoparticles to form largernanoparticles was believed to be favored over the nucleation. Inaddition, the Fig. 3 inset shows the changing silver nanoparticle colorat a different temperature that confirms UV–vis spectra in Fig. 5.
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