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2011 | 9 | 4 | 572-584
Tytuł artykułu

Characterization of CdSe quantum dots with bidentate ligands by capillary electrophoresis

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The CdSe quantum dots (QDs) with bidentate ligands: a-diimine (NN) and dihydrolipoic acid (DHLA) were synthesized and characterized by UV-Vis, particle size and capillary electrophoretic techniques. Two systems were analyzed: CdSe with one ligand (CdSe/ligand) and CdSe with two different ligands (CdSe//ligand1/ligand2), where ligand = α-diimine or DHLA. Hydrodynamic features of functionalized QDs were characterized by zone capillary electrophoretic (CZE), and particle size techniques and these methods were consistent. It was established that CZE, micellar (MEKC) and microemulsion (MEEKC) modes were suitable for separating charged CdSe QDs and that no peaks were obtained for QDs passivated with electrically neutral ligands. For CdSe QDs with neutral (NN) ligands, a preconcentration method with the use of a micellar plug was introduced for visualizing these QDs. A sharp peak representing neutral QDs was obtained within the zone of micellar plug of a non-ionic surfactant, Here, a ligand character used for CdSe modification and the type of the electrophoretic method applied were the determining factors for the QDs peak visualization. Moreover, examples of visualization of charged and neutral QDs on the same run were presented, and for this purpose, dual mechanism (separation/preconcentration) was proposed. [...]
Wydawca

Czasopismo
Rocznik
Tom
9
Numer
4
Strony
572-584
Opis fizyczny
Daty
wydano
2011-08-01
online
2011-06-04
Twórcy
  • Department of Analytical Chemistry, Faculty of Chemistry, Warsaw University of Technology, 00-664, Warsaw, Poland, slaosw@ch.pw.edu.pl
  • Department of Analytical Chemistry, Faculty of Chemistry, Warsaw University of Technology, 00-664, Warsaw, Poland
  • Department of Chemistry and Biochemistry, The University of Tulsa, Tulsa, OK, 74104, USA
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11532-011-0037-3
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