Surface morphology dependent photoluminescence from colloidal silicon nanocrystals.
Monodisperse 1-2 nm silicon nanocrystals are synthesized in reverse micelles and have their surfaces capped with either allylamine or 1-heptene to produce either hydrophilic or hydrophobic silicon nanocrystals. Optical characterization (absorption, PL, and time-resolved PL) is performed on colloidal solutions with the two types of surface-capped silicon nanocrystals with identical size distributions. Direct evidence is obtained for the modification of the optical properties of silicon nanocrystals by the surface-capping molecule. The two different surface-capped silicon nanocrystals show remarkably different optical properties.
Warner
Jamie H
JH
Rubinsztein-Dunlop
Halina
H
Tilley
Richard D
RD
D000499:Allylamine / Q000737:chemistry; D003102:Colloids / Q000737:chemistry*; D049449:Luminescence; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D010777:Photochemistry; D012825:Silicon / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013499:Surface Properties
D003102:Colloids; D000499:Allylamine; D012825:Silicon