6533b82dfe1ef96bd129121b
RESEARCH PRODUCT
Structure determination and homogeneous optical properties of CdS/HgS quantum dots
Alf MewsA. P. AlivisatosUri BaninA. V. Kadavanichsubject
SemiconductorNanocrystalQuantum dotPhononChemistrybusiness.industryGeneral Chemical EngineeringAnalytical chemistryCrystalliteHigh-resolution transmission electron microscopyAbsorption (electromagnetic radiation)Spectroscopybusinessdescription
The structural and optical properties of heterogeneous semiconductor nanoparticles consisting of CdS and HgS are investigated by High Resolution Electron Microscopy (HRTEM) and selective spectroscopy like Hole Burning (HB) and Fluorescence Line Narrowing (FLN). The HRTEM study shows that epitaxy is possible in nanocrystals, provided the crystallites have well defined faceted shapes to begin with. From the HB- and FLN experiments homogeneous absorption and fluorescence spectra are calculated. It could be shown that the absorption is coupled to HgS-like phonons (250 cm -1 ) whereas the emission frequency is closer to the LO phonon frequency of CdS.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1997-11-01 | Berichte der Bunsengesellschaft für physikalische Chemie |