Figure 8.

TEM images(a)nanotip fragments and microspheres with corresponding EDX area scans showing the composition of microspheres to be primarily(b)silicon,(c)calcium,(d)aluminum, and(e)magnesium; while nanotips are composed of(f)sodium and(g)oxygen.

Samarasekera et al. Nanoscale Research Letters 2012 7:404   doi:10.1186/1556-276X-7-404
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