Surface chemistry controls crystallinity of ZnS nanoparticles.
Combined small-angle and high energy wide-angle X-ray scattering measurements of nanoparticle size and structure permit interior strain and disorder to be observed directly in the real-space pair distribution function (PDF). PDF analysis showed that samples of ZnS nanoparticles with similar mean diameters (3.2-3.6 nm) but synthesized and treated with different low-temperature procedures possess a dramatic range of interior disorder. We used Fourier transform infrared spectroscopy to detect the surface species and the nature of surface chemical interactions. Our results suggest that there is a direct correlation between the strength of surface-ligand interactions and interior crystallinity.
Gilbert
Benjamin
B
Department of Earth and Planetary Sciences, University of California, Berkeley, California 94720, USA. bgilbert@lbl.gov
Huang
Feng
F
Lin
Zhang
Z
Goodell
Carmen
C
Zhang
Hengzhong
H
Banfield
Jillian F
JF
D003460:Crystallization / Q000379:methods*; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D013440:Sulfides / Q000032:analysis / Q000737:chemistry*; D013499:Surface Properties; D017967:Zinc Compounds / Q000032:analysis / Q000737:chemistry*
D013440:Sulfides; D017967:Zinc Compounds; C031238:zinc sulfide