Microwave assisted synthesis of ZnS quantum dots using ionic liquids
2012 (English)In: Materials letters (General ed.), ISSN 0167-577X, E-ISSN 1873-4979, Vol. 89, 316-319 p.Article in journal (Refereed) Published
In this work we report results from microwave (MW) assisted synthesis of highly crystalline ZnS quantum dots (QDs) using ionic liquid (ILs) as MW absorbing medium. Two types of ionic liquids, imidazolium and phosphonium based, were used. The QDs are less than 5 nm in size and of wurtzite ZnS type, as characterized by high-resolution transmission electron microscopy (HR-TEM) and selected area electron diffraction (SAED) pattern. The optical properties were investigated by UV-vis absorption and show a blue shift in absorption as compared to bulk wurtzite ZnS due to quantum confinement effects. The photoluminescence (PL) spectra of the QDs show different trap state emissions.
Place, publisher, year, edition, pages
2012. Vol. 89, 316-319 p.
Nanocrystalline materials, Semiconductors, Chemical synthesis, Electron microscopy, Crystal structure, Optical properties
Other Chemical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-104989DOI: 10.1016/j.matlet.2012.08.143ISI: 000311327200089ScopusID: 2-s2.0-84867537888OAI: oai:DiVA.org:kth-104989DiVA: diva2:567982
FunderSwedish Research CouncilStandUp
QC 201211152012-11-152012-11-152013-04-16Bibliographically approved