Silica field-emission scanning electron

Figure 10.12. Atomic force microscope (a) and field-emission scanning electron microscope (b) images of an ordered array of 200-nm silver-coated silica spheres. (With permission from Ref. 37.)...

After 5 minutes of reaction time in each case, the solution was centrifuged and washed with DI water three times. A few drops of washed solutions were placed on sample holders in each case and left to dry under ambient conditions. The dried sanq>les were either coated by evaporation of gold-palladium alloy or sputter coated with gold and they were further characterised by Field Emission-Scanning Electron Microscope (FE-SEM) for product morphology, which was also equipped with an Energy Dispersive Spectroscopy (EDS) facility for elemental analysis. In the control experiments without using the protein, no silica precipitation was observed even over a 24 hour period, as was described previously [13]. 

Figure 3.3 Field emission scanning electron microscopy (FESEM) image of fibronectin-coated silica nanowires.

Field Emission Scanning Elecfron Microscopy (FE-SEM) was performed in order to study the product morphologies of the samples. The aforementioned silica samples, which were suspended in water, were centrifuged (r. p. m. = 13400) and washed with ethanol. They were then placed on SEM sample holders and dried. The dried silica samples were sputter coated with gold and were then analyzed under the electron microscope. 

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