Table 1 Geometries observed for different solvents.

Information about regular structures of nanoparticle films that spontaneously formed on polar Si3N4 in different solvents as derived from liquid-phase electron micrographs. Values are indicated for the solvent’s dielectric constant εr.

SolventεrSymmetry in
single layers
Symmetry in
double layers
Toluene2.38HexagonalQuasi-crystal,
dodecagonal
Hexadecane2.09HexagonalCubic
(body-centered
cubic)
Cyclohexane2.02HexagonalHexagonal
Octane2.00HexagonalCubic