Atomic positional versus electronic order in semiconducting ZnSe nanoparticles.
Size-controlled ZnSe nanoparticles with high extents of atomic positional order are shown to exhibit large size-dependent variations in their local electronic environments. Solid-state ;{77}Se and ;{67}Zn NMR spectra reveal increasingly broad distributions of ;{77}Se and ;{67}Zn environments with decreasing nanoparticle sizes, in contrast with high degrees of atomic positional order established by transmission electron microscopy and x-ray diffraction. First-principles calculations of NMR parameters distinguish between atomic positional and electronic disorder that propagate from the nanoparticle surfaces and yield insights on the order and disorder present.
Cadars
S
S
Department of Chemical Engineering, University of California, Santa Barbara, California 93106, USA.
Smith
B J
BJ
Epping
J D
JD
Acharya
S
S
Belman
N
N
Golan
Y
Y
Chmelka
B F
BF