Role of surface ligands in optical properties of colloidal CdSe/CdS quantum dots
2011 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 13, no 13, 5848-5854 p.Article in journal (Refereed) Published
In order to study the role of surface ligands in determining optical properties of colloidal quantum dots (QDs), we have selectively fabricated and studied CdSe/CdS core-shell QDs with strongly confined electron and hole states attached with commonly used surface ligands. Optical properties, viz. absorption and fluorescence of these QDs, are characterized from which salient changes have been observed for different ligand substitutions which, through theoretical analysis, can be associated with electronic structure properties of the QD-ligand composite systems, in particular localization of wave functions of electrons and holes in the QDs and the band matching of the HOMO-LUMO gap of the ligands. The findings can be utilized to facilitate the understanding and optimization of properties of QD biomarkers with functionalizing surface ligands for targeting cellular objects.
Place, publisher, year, edition, pages
2011. Vol. 13, no 13, 5848-5854 p.
IdentifiersURN: urn:nbn:se:kth:diva-33395DOI: 10.1039/c0cp02688cISI: 000288447100043ScopusID: 2-s2.0-79952722232OAI: oai:DiVA.org:kth-33395DiVA: diva2:415001
FunderSwedish e‐Science Research Center
QC 201105052011-05-052011-05-052012-05-23Bibliographically approved