Skip to main content
. 2021 Oct 15;33(52):2106229. doi: 10.1002/adma.202106229

Figure 3.

Figure 3

Electrical (charge) properties of {100} and {110} facets SrTiO3 nanoparticles. a) Surface charge of {100} and {110} facets of SrTiO3 nanoparticle as a function of pH in 10 × 10−3 m NaCl. The thick dashed blue and orange lines represent the best‐fit surface complexation model (see the Experimental Section for details). The thin black dotted line is the calculated particle charge accounting for particle {110} and {100} facets areas ({100}:{110} = 0.224:0.776). b–e) SEM images of SrTiO3 nanoparticle after silica nanoparticles (12 nm) adsorption experiment at different pH. At pH 4 and 5.7 negatively charged SiO2 nanoparticles are adsorbed only on positively charged squared {100} facets. At pH 3.5 both {100} and {110} facets of SrTiO3 are positively charged and negatively charged SiO2 are deposited on both facets. At pH 10.8 negatively charged facets and silica nanoparticles repel each other, thus no adsorption of SiO2 particles is observed.