Scopul nostru este sprijinirea şi promovarea cercetării ştiinţifice şi facilitarea comunicării între cercetătorii români din întreaga lume.
Autori: Sui G, Orbulescu J, Ji XJ, Gattas-Asfura KM, Micic M, Leblanc RM
Editorial: Catherine Murphy, Kluver Academinc Publishers, Journal of Cluster Science, 14 (2), p.123-133, 2003.
Since luminescent CdSe quantum dots (QDs) have shown great potential in biological labeling, the surface chemistry behavior of QDs at interfaces is of great research interest. In the present study, CdSe QDs with green luminescence were modified with hydrophobic chains of varying lengths [from C6 to C18]. These modified QDs can be utilized to form stable monolayers at the air/water interface. Surface pressure-area isotherms of modified QDs have been measured and limiting molecular areas have also been extrapolated in order to analyze the size of the QDs. UV absorption spectra of modified QDs at various surface pressures were also determined. Surface chemistry, as well as the topographic properties, of modified QDs in Langmuir and L-B films was discussed.
Cuvinte cheie: QDs, CdSe, monolayer, air/water interface, surface pressure, molecular area, ESEM