80CHAPTER 3 Advanced characterization techniques for nanostructures
these exposures may increase the effective surface area of Ti, and thus its biocompat-
ibility. Auger electron microanalysis enabled subtle changes in the modied Ti sur-
face layer to be examined in terms of local chemical composition. SEM images and
AES spectra are shown in Figure 3.16 for as-received Ti (a) and after pre-treatment
in NaOH (b).
Immersion in 5 M NaOH and subsequent heating up to 600°C results in a porous,
‘honeycomb’ morphology. In terms of the Auger spectra, the signals from Ti and O
are well distinguishable, implying that the Ti is oxidized. The relative peak ...
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