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Preparation and Optical Absorption Properties of Cds, Zns, Znxcd1-xs and Core/shell Cds/zns Nanoparticles
| Content Provider | Semantic Scholar |
|---|---|
| Author | Svoboda, Ladislav Hořínková, Petra |
| Copyright Year | 2013 |
| Abstract | CdS, ZnS, ZnxCd1-xS and CdS/ZnS nanoparticles were synthesized by precipitation of zinc and cadmium cations with sulphide anions in aqueous dispersions of cetyltrimethylammonium bromide (CTAB). UV-VIS absorption spectra of these dispersions were recorded and used for evaluation of the nanoparticles gap energies (Eg). In case of ZnS and CdS nanoparticles the gap energies were used for calculations of their size according to the Brus equation [1]. Size of ZnS and CdS nanoparticles was tuned by the concentration of CTAB. The gap energies of ZnxCd1-xS were found to be linearly dependent on the composition x (varying from 0 to 1) in agreement with to the Vegard law: Eg = 2.57 + 1.40 x. The gap energies of CdS/ZnS systems revealed tunnelling of electrons and holes from the CdS core through the ZnS shell and also indicated relaxation of a strain in the shell with increasing thickness. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://nanocon2014.tanger.cz/files/proceedings/14/reports/2172.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
