Figure 4

TEM images of (a) the SiO2 micro-pillar; (b) the oxide-substrate system; (c) enlarged view of the oxide-substrate system in (b) along with EDS elemental maps.

TEM images of (a) the SiO2 micro-pillar; (b) the oxide-substrate system; (c) enlarged view of the oxide-substrate system in (b) along with EDS elemental maps.