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The electron absorption spectra of silicon dioxide nanoparticles were studied in the range of 400-700 nm by the Japanese 317PC UV-Vis absorption spectrophotometer, and ethanol was used as a substrate for all media. Figure 9 shows the effect of different concentrations of ethanol, water, TEOS and ammonia on the absorbance of silica nanoparticles. All spectra have been normalized to samples with a spectral wavelength of 650 nm. All spectra, except Sample 6, have the same shape and are concentrated at a wavelength of 525 nm. An absorption peak of about 525 nm can be referred to as a van derific point, which appears in the localized silica nanoparticle dense state, according to Li Bai, showing the dependence of bandgap energy and van der Waois's peak. This information allows us to confirm that the silicon dioxide is far conductive and is therefore considered to be isolated. However, the peak values of these samples around 525 nm have different spectral widths, usually interacting with the particles, and predicting that the silica has large diameter and small diameter particles. This prediction is confirmed by scanning electron microscopy (SEM), as shown in Fig. Thus, the composition of these samples modifies their absorption spectra. 

So far, we have studied all the parameters that affect the size of the silicon dioxide particles. Experimental study of the effect of ultrasonic power on the size of silica particles is underway. The effect of multi-parameter optimization in a continuous manner will take action.



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