A Study Aimed at Understanding the Use of Nanomaterial-Treated Filters …
99
Fig. 3 Scanning electron microscopy images of a 21 nm gold nanoparticles prepared in the absence
of stainless-steel wool, b 25 nm gold nanoparticles prepared in the presence of stainless-steel
wool—images collected from gold nanoparticles solution, c–f 13 nm gold nanoparticles produced
on stainless-steel wool, and g–i scanning electron microscopy image of untreated stainless-steel
wool control
is broad indicating the production of larger size nanoparticle and/or polydisperse in
nature.
The scanning electron microscopy analysis (Fig. 3) conducted on these structures
supports the ultraviolet–visible results, showing that the nanoparticles were slightly
polydisperse in size and shape. While an average of 25 ± 5 nm in diameter (Fig. 3b)
was determined for gold nanoparticle solutions prepared in the presence of stainlesssteel wool, three distinct different size populations were recorded with dimensions
that varied from ≈9.8 to ≈43 nm. These two different gold nanoparticle solutions,
prepared in the absence or presence of stainless-steel wool, were also evaluated and
compared with gold nanoparticles grown onto stainless-steel wool. Scanning electron
microscopy studies were conducted to investigate the gold nanoparticle produced on
stainless-steel wool. These studies show the production of individual and also clusters
of gold nanoparticles on stainless-steel wool. We also found that gold nanoparticles
formed on stainless-steel wool were different in size from both those present in
the absence or presence of stainless-steel wool solutions. The gold nanoparticles
produced on the stainless-steel wool filters were, on average, 13 ± 1 nm in diameter
(Fig. 3c). These dimensions are smaller than the 21 ± 1 nm diameter average gold
99
Fig. 3 Scanning electron microscopy images of a 21 nm gold nanoparticles prepared in the absence
of stainless-steel wool, b 25 nm gold nanoparticles prepared in the presence of stainless-steel
wool—images collected from gold nanoparticles solution, c–f 13 nm gold nanoparticles produced
on stainless-steel wool, and g–i scanning electron microscopy image of untreated stainless-steel
wool control
is broad indicating the production of larger size nanoparticle and/or polydisperse in
nature.
The scanning electron microscopy analysis (Fig. 3) conducted on these structures
supports the ultraviolet–visible results, showing that the nanoparticles were slightly
polydisperse in size and shape. While an average of 25 ± 5 nm in diameter (Fig. 3b)
was determined for gold nanoparticle solutions prepared in the presence of stainlesssteel wool, three distinct different size populations were recorded with dimensions
that varied from ≈9.8 to ≈43 nm. These two different gold nanoparticle solutions,
prepared in the absence or presence of stainless-steel wool, were also evaluated and
compared with gold nanoparticles grown onto stainless-steel wool. Scanning electron
microscopy studies were conducted to investigate the gold nanoparticle produced on
stainless-steel wool. These studies show the production of individual and also clusters
of gold nanoparticles on stainless-steel wool. We also found that gold nanoparticles
formed on stainless-steel wool were different in size from both those present in
the absence or presence of stainless-steel wool solutions. The gold nanoparticles
produced on the stainless-steel wool filters were, on average, 13 ± 1 nm in diameter
(Fig. 3c). These dimensions are smaller than the 21 ± 1 nm diameter average gold